JP4814435B2

JP4814435B2 - Synthetic swellable fluorinated mica containing aluminum

Info

Publication number: JP4814435B2
Application number: JP2001102959A
Authority: JP
Inventors: 俊一太田
Original assignee: Topy Industries Ltd
Current assignee: Topy Industries Ltd
Priority date: 2001-04-02
Filing date: 2001-04-02
Publication date: 2011-11-16
Anticipated expiration: 2021-04-02
Also published as: JP2002293532A

Description

【０００１】
【発明の属する技術分野】
本発明は、固体潤滑剤、増粘剤、フィラー材料等として使用される合成膨潤性フッ素雲母に係り、詳記すれば、結晶構造中にアルミニウム若しくはアルミニウムとリチウムとを含有する新規合成膨潤性フッ素雲母に関するものである。
【０００２】
【従来の技術】
合成膨潤性フッ素雲母は、従来から固体潤滑剤、増粘剤、フィラー材料等として使用されている。この従来の合成膨潤性フッ素雲母は、層間にNaを持つ四珪素雲母であった。しかしながら、この層間にＮａを持つ四珪素雲母は、合成時の回収物単位重量あたりの生成率が低く、その結果精製して不純物を取り除く必要があるという問題があった。そのため、作業工程が煩雑となる問題があった。
【０００３】
このような欠点があるにもかかわらず、合成膨潤性雲母として、層間にＮａを持つ四珪素雲母が使用されていたのは、その構造中の四面体位置にアルミニウムを含有させると膨潤能を失うと考えられていたためである。例えば下記先行技術文献には、アルミニウムとリチウムとを同時に配合するとスポデュメーン（リシア輝石）になり膨潤性雲母は形成されない旨記載されている。このような理由から、膨潤性フッ素雲母の合成においては、アルミニウムとリチウムとの配合はもとより、アルミニウムの配合についても検討されていなかった。そればかりか、製造時のアルミニウムの混入は極力避けるように工夫されており、坩堝、熔融炉の材料にはアルミニウムが含まれないものが用いられていた。
【０００４】
膨潤性フッ素雲母の先行技術文献としては、著者；Haskiel R. Shell & Kenneth H. IveyのFluorine micas p.123-141、第１６章水膨潤性フッ素雲母及びフッ素モンモリロナイト、発行元；U.S.Dept. of the Interior,Bureau of Mines,発行年；１９６９年が挙げられる。
【０００５】
【発明が解決しようとする課題】
この発明のうち請求項１記載の発明は、合成時の回収物単位重量あたりの生成率が向上し得る新規合成膨潤性フッ素雲母を提供することを目的とする。
【０００６】
また、請求項２記載の発明は、上記請求項１記載の目的に加えて、従来よりも膨潤性が高められ得る新規合成膨潤性フッ素雲母を提供することを目的とする。
【０００７】
更に、本発明は、不純物の量を減らし、用途によっては精製を不要とできる新規合成膨潤性フッ素雲母を提供することを目的とする。
【０００８】
【課題を解決するための手段】
本発明者等は、上記目的を達成するため鋭意研究を重ねた結果、従来使用を避けていたアルミニウムをあえて構造中の四面体位置の珪素に置き換えて導入することによって、膨潤性を有し、しかも従来の四珪素雲母より生成率を著しく向上させ得ることを見出し、請求項１に記載の本発明に到達した。
【０００９】
即ち、本発明のうち請求項１記載の発明は、合成雲母の結晶構造中に、アルミニウムを含有することを特徴とする。該アルミニウムは、合成雲母の結晶構造中の四面体位置にある珪素の一部を置き換える形で含有している。
【００１０】
具体的には、溶融法で合成された、化学組成が
【化１】

（式中、Ｘの値は
【数１】

である）で表される合成膨潤性フッ素雲母である。
【００１１】
アルミニウムに加えて、更にリチウムを含有させると、合成膨潤性フッ素雲母の生成率が高められるだけでなく、膨潤性もアルミニウムを含有しない従来の雲母よりも高められ得る合成膨潤性フッ素雲母が得られる。これは、従来の予測に全く反する結果である。
【００１２】
即ち、請求項２記載の発明は、合成雲母の結晶構造中に、アルミニウムとリチウムとを含有することを特徴とする。該リチウムは、合成雲母の結晶構造中の層間のナトリウムの一部若しくは全部を置き換える形で含有している。
【００１３】
具体的には、溶融法で合成された、化学組成が
【化２】

（式中、Ｘ'の値は０．５≧Ｘ’＞０であり、Ｙの値は０．８≧Ｙ＞０である）で表される合成膨潤性フッ素雲母である。
【００１４】
【発明の実施の形態】
本発明の合成膨潤性フッ素雲母は、好ましくは、前記[化１]又は[化２]になるように原料を調合し、これを加熱することによる溶融法によって製造することができる。
【００１５】
即ち、上記[化１]で表される合成膨潤性フッ素雲母は、原料として二酸化珪素、酸化マグネシウム、フッ化マグネシウム、珪フッ化ナトリウム、フッ化ナトリウム、炭酸ナトリウム、及び天然鉱物であるタルク等と四面体位置に入るアルミニウムの素となる酸化アルミニウムを、目的とする膨潤性フッ素雲母の化学組成になるように調合し、熔融炉で加熱融解し、これを冷却することによって得られる。
【００１６】
また、上記[化２]で表される合成膨潤性フッ素雲母は、上記原料に加えて、層間位置に入るリチウムの素となるフッ化リチウムもしくは炭酸リチウム等を添加して、同様に加熱融解、冷却することによって得られる。
【００１７】
加熱融解温度は、１２００℃〜１６００℃好ましくは１４００℃〜１５００℃である。加熱融解した熔融体は、好ましくは０．０１℃／分〜５０℃／分、更に好ましくは１℃／分〜１０℃／分の冷却速度で冷却し、結晶化させると良い。
【００１８】
前記[化１]中の(Al_XSi_4-X)は、雲母の結晶構造における四面体位置の陽イオンのモル数を表し、好ましくは０．５≧Ｘ＞０、特に好ましくは０．５≧Ｘ≧０．０１の値をとるようにすると良い。Ｘの値が大きすぎると、雲母の膨潤性が低下する。このような組成は、前記したように、合成時に原料配合組成を調整することによって、自由に制御することができる。
【００１９】
[化２]中の(Al_X _´Si_4-X _´)は、好ましくは１≧Ｘ´＞０、特に好ましくは０．８≧Ｘ´≧０．１の値をとるようにすると良い。前記[化１]中のＸよりも、値が大きくても差し支えなくなっているのは、Ｌｉを導入することによって、膨潤性が向上するためである。
【００２０】
[化２]中、１≧Ｘ´であるのは、雲母の構造上八面体位置は三つしかなく、単位格子当りのＭｇは、最大で３であるので、３≧２．５＋Ｘ´／２となり、１≧Ｘ´となるからである。
【００２１】
[化２]中の(Li_ＹNa_1- _Ｙ) は、雲母の結晶構造における層間の陽イオンのモル比を表し、１≧Ｙ＞０好ましくは０．８≧Ｙ≧０．１の値をとるようにすると良い。
【００２２】
本発明で得られる合成膨潤性フッ素雲母は、膨潤性を保持し、しかも従来の四珪素雲母より高い生成率を示す。
【００２３】
また、アルミニウムに加えて更にリチウムを含有させると、アルミニウムとリチウムとの相乗効果により、アルミニウムのみを有する合成膨潤性フッ素雲母に比べて、高い膨潤性が得られると共に、生成率も更に向上する。
【００２４】
本発明の合成膨潤性フッ素雲母は、従来の四珪素雲母と同様に固体潤滑剤、増粘剤、フィラー材料等の通常の用途に用いることができる。本発明の合成膨潤性フッ素雲母は、新規物質であり、従来に無い優れた性質の膨潤性雲母も含まれているので、従来にない色々な用途への応用も期待される。
【００２５】
【実施例】
次に、実施例、比較例を挙げて本発明を更に説明するが、本発明は、これら実施例に限定されない。例中、生成率は陽イオン交換容量（ＣＥＣ）の値により測定し、膨潤力については、日本ベントナイト工業会により規定された標準法に基づいて評価した。
【００２６】
実施例１
後記表1に示す配合割合で原材料を１ｋｇ調合し、熔融合成法によって、膨潤性合成フッ素雲母を合成した。得られた回収物を全量粉砕した試料について、生成率（ＣＥＣ）を測定した。結果を後記表２に示す。
【００２７】
実施例２
後記表1に示す配合割合で原材料を１ｋｇ調合し、熔融合成法で膨潤性フッ素雲母を合成し、実施例１と同様にして生成率（ＣＥＣ）を測定した。結果を後記表２に示す。
【００２８】
実施例３
後記表1に示す通り、実施例1と同じ配合割合で原材料を５００ｋｇ調合し、熔融合成法で膨潤性フッ素雲母を合成し、実施例１と同様にして生成率（ＣＥＣ）を測定した。結果を後記表２に示す。
【００２９】
実施例４
後記表1に示す配合割合で原材料を１ｋｇ調合し、熔融合成法で膨潤性フッ素雲母を合成し、実施例１と同様にして生成率（ＣＥＣ）を測定した。結果を後記表２に示す。
【００３０】
比較例１
後記表1に示す配合割合で原材料を１ｋｇ調合し、熔融合成法で膨潤性フッ素雲母を合成し、実施例１と同様にして生成率（ＣＥＣ）を測定した。結果を後記表２に示す。
【００３１】
比較例２
後記表1に示す通り、比較例1と同じ配合割合で原材料を５００ｋｇ調合し、熔融合成法で膨潤性フッ素雲母を合成し、実施例１と同様にして生成率（ＣＥＣ）を測定した。結果を後記表２に示す。
【００３２】
【表１】

【００３３】
【表２】

上記表２から明らかなように、比較例１〜２と比べて実施例１〜４では、CECが著しく高い値を示している。これは本発明の回収物単位質量あたりの生成量が、従来の四珪素雲母の生成率よりも著しく多いことを示すものである。尚、膨潤性については、比較例よりも実施例では低下していたが、いずれも膨潤性雲母として十分産業上利用し得る膨潤性（膨潤力：１０〜１５(cc/2g)）を示すことが実験により確認されている。
【００３４】
実施例５
後記表３に示す配合割合で原材料を１ｋｇ調合し、熔融合成法で膨潤性フッ素雲母を合成した。得られた回収物を全量粉砕した試料について、生成率の測定と膨潤力評価を行った。結果を後記表４に示す。
【００３５】
実施例６
後記表３に示す配合割合で原材料を１ｋｇ調合し、熔融合成法で膨潤性フッ素雲母を合成し、実施例５と同様にして生成率の測定と膨潤力評価を行った。結果を後記表３に示す。
【００３６】
実施例７
後記表３に示す通り、実施例６と同じ配合割合で原材料を５００ｋｇ調合し、熔融合成法で膨潤性フッ素雲母を合成し、実施例５と同様にして生成率の測定と膨潤力評価を行った。結果を後記表３に示す。
【００３７】
実施例８
後記表３に示す配合割合で原材料を１ｋｇ調合し、熔融合成法で膨潤性フッ素雲母を合成し、実施例５と同様にして生成率の測定と膨潤力評価を行った。結果を後記表３に示す。
【００３８】
実施例９
後記表３に示す通り、実施例４と同じ配合割合で原材料を５００ｋｇ調合し、熔融合成法で膨潤性フッ素雲母を合成し、実施例５と同様にして生成率の測定と膨潤力評価を行った。結果を後記表３に示す。
【００３９】
実施例１０
後記表３に示す配合割合で原材料を１ｋｇ調合し、熔融合成法で膨潤性フッ素雲母を合成した。実施例５と同様にして生成率の測定と膨潤力評価を行った。結果を後記表３に示す。
【００４０】
比較例３
後記表３に示す配合割合で原材料を１ｋｇ調合し、熔融合成法で膨潤性フッ素雲母を合成し、実施例５と同様にして生成率の測定と膨潤力評価を行った。結果を後記表３に示す。
【００４１】
比較例４
後記表３に示す配合割合で原材料を１ｋｇ調合し、熔融合成法で膨潤性フッ素雲母を合成し、実施例５と同様にして生成率の測定と膨潤力評価を行った。結果を後記表３に示す。
【００４２】
比較例６
後記表３に示す通り、比較例３と同じ配合割合で原材料を５００ｋｇ調合し、熔融合成法で膨潤性フッ素雲母を合成し、実施例５と同様にして生成率の測定と膨潤力評価を行った。結果を後記表３に示す。
【００４３】
【表３】

【００４４】
【表４】

【００４５】
上記表４の結果から、アルミニウムに加えてリチウムを添加した実施例５〜１０では、従来の四珪素雲母の比較例３〜５と比べて、ＣＥＣ及び膨潤力のいずれも高い値になっている。このことから、アルミニウムに加えてリチウムを添加した本発明の膨潤性雲母は、回収物単位質量あたりの生成量が高くなるだけでなく、膨潤力も向上すること明らかである。
【００４６】
また、実施例５〜１０のリチウムの添加量、比較例４及び前記実施例１〜４との比較から、リチウムを添加することにより、膨潤性が向上するだけでなく、生成率も向上することがわかる。
【００４７】
【発明の効果】
以上述べた如く、本発明のうち請求項１記載の発明によれば、従来の四珪素雲母と比べて、合成時の回収物単位重量あたりの生成率が著しく向上し得るので、不純物の量が著しく減少し、用途によっては精製を不要とすることができる。その結果、膨潤性雲母を工業的に著しく安価に供することができるという絶大な効果を示す。
【００４８】
また、請求項２記載の発明によれば、上記請求項１に記載の効果に加えて、従来よりも膨潤性が高められ得ると共に更に生成率が向上し得る利点が得られる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic swellable fluorine mica used as a solid lubricant, a thickener, a filler material, and the like, and more specifically, a novel synthetic swellable fluorine containing aluminum or aluminum and lithium in a crystal structure. It is about mica.
[0002]
[Prior art]
Synthetic swellable fluorinated mica has been conventionally used as a solid lubricant, a thickener, a filler material, and the like. This conventional synthetic swellable fluorine mica was tetrasilicon mica having Na between layers. However, the tetrasilicon mica having Na between the layers has a problem that the production rate per unit weight of the recovered product at the time of synthesis is low, and as a result, it is necessary to purify and remove impurities. Therefore, there is a problem that the work process becomes complicated.
[0003]
Despite these drawbacks, tetrasilicon mica with Na between layers was used as a synthetic swelling mica, because when aluminum is contained in the tetrahedral position in the structure, the swelling ability is lost. It was because it was thought. For example, the following prior art documents describe that when aluminum and lithium are blended simultaneously, spodumene (lithia pyroxene) is formed and no swellable mica is formed. For these reasons, in the synthesis of swellable fluoromica, not only the blending of aluminum and lithium but also the blending of aluminum has not been studied. In addition, it has been devised to avoid mixing aluminum as much as possible, and the crucible and melting furnace materials that do not contain aluminum have been used.
[0004]
Prior art literature on swellable fluorinated mica includes the author; Haskiel R. Shell & Kenneth H. Ivey's Fluorine micas p.123-141, Chapter 16 Water-swellable fluorinated mica and fluor montmorillonite, publisher; USDept. Of the Interior, Bureau of Mines, publication year; 1969.
[0005]
[Problems to be solved by the invention]
The object of the present invention is to provide a novel synthetic swellable fluorinated mica capable of improving the production rate per unit weight of the recovered product during synthesis.
[0006]
The invention of claim 2, wherein, in addition to the purpose of the claim 1, and an object thereof is to provide a novel synthetic swellable fluorinated mica that may swellability increased than before.
[0007]
Furthermore, an object of the present invention is to provide a novel synthetic swellable fluoromica capable of reducing the amount of impurities and eliminating the need for purification depending on applications.
[0008]
[Means for Solving the Problems]
As a result of intensive research to achieve the above-mentioned object, the present inventors have swelled by introducing aluminum, which was conventionally avoided, by replacing it with silicon at the tetrahedral position in the structure, In addition, the inventors have found that the production rate can be remarkably improved compared to the conventional tetrasilicon mica, and have reached the present invention according to claim 1.
[0009]
That is, the invention according to claim 1 of the present invention is characterized in that aluminum is contained in the crystal structure of the synthetic mica. The aluminum is contained in a form that replaces a part of silicon at a tetrahedral position in the crystal structure of the synthetic mica .
[0010]
Specifically , the chemical composition synthesized by the melting method is:

(In the formula, the value of X is ## EQU1 ##

It is a synthetic swelling fluorine mica represented by .
[0011]
When lithium is further contained in addition to aluminum, not only the production rate of the synthetic swellable fluorine mica is increased, but also a synthetic swellable fluorine mica that can be enhanced in comparison with the conventional mica not containing aluminum is obtained. . This is a result completely contrary to the conventional prediction.
[0012]
That is, the invention described in claim 2 is characterized in that aluminum and lithium are contained in the crystal structure of the synthetic mica. The lithium is contained in the form of replacing part or all of sodium between layers in the crystal structure of the synthetic mica .
[0013]
Specifically, the chemical composition synthesized by the melting method is

( Wherein the value of X ′ is 0.5 ≧ X ′> 0 and the value of Y is 0.8 ≧ Y> 0 ).
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The synthetic swellable fluorinated mica of the present invention can be preferably produced by a melting method in which raw materials are prepared so as to have the above [Chemical Formula 1] or [Chemical Formula 2] and heated.
[0015]
That is, the synthetic swellable fluorinated mica represented by the above [Chemical Formula 1] includes silicon dioxide, magnesium oxide, magnesium fluoride, sodium silicofluoride, sodium fluoride, sodium carbonate, and natural mineral talc as raw materials. It is obtained by preparing aluminum oxide, which is a base of aluminum entering the tetrahedron position, so as to have the chemical composition of the target swellable fluorine mica, heating and melting it in a melting furnace, and cooling it.
[0016]
Further, the synthetic swellable fluorine mica represented by the above [Chemical Formula 2], in addition to the above raw materials, is added with lithium fluoride or lithium carbonate that becomes a source of lithium entering the interlayer position, and is similarly heated and melted. Obtained by cooling.
[0017]
The heating and melting temperature is 1200 ° C to 1600 ° C, preferably 1400 ° C to 1500 ° C. The heat-melted melt is preferably cooled at a cooling rate of 0.01 ° C./min to 50 ° C./min, more preferably 1 ° C./min to 10 ° C./min, and crystallized.
[0018]
(Al _X Si _4-X ) in [Chemical Formula 1] represents the number of moles of cations at the tetrahedral position in the crystal structure of mica, preferably 0.5 ≧ X> 0, particularly preferably 0.5. It is preferable to take a value of ≧ X ≧ 0.01. When the value of X is too large, the swellability of mica is lowered. As described above, such a composition can be freely controlled by adjusting the raw material composition during synthesis.
[0019]
(Al _X _' Si _4-X _' ) in [Chemical Formula 2] preferably takes a value of 1 ≧ X ′> 0, particularly preferably 0.8 ≧ X ′ ≧ 0.1. The reason why the value can be larger than X in the above [Chemical Formula 1] is that the introduction of Li improves the swellability.
[0020]
In [Chemical Formula 2], 1 ≧ X ′ is because there are only three octahedral positions in the structure of mica, and the maximum number of Mg per unit cell is 3, 3 ≧ 2.5 + X ′ / 2. This is because 1 ≧ X ′.
[0021]
(Li _Y Na _1- _Y ) in [Chemical Formula 2] represents the molar ratio of cations between layers in the crystal structure of mica, and 1 ≧ Y> 0, preferably 0.8 ≧ Y ≧ 0.1. It is better to take it.
[0022]
The synthetic swellable fluorinated mica obtained in the present invention retains the swellability and exhibits a higher production rate than the conventional tetrasilicon mica.
[0023]
Further, when lithium is further contained in addition to aluminum, a high swellability is obtained and the production rate is further improved due to the synergistic effect of aluminum and lithium as compared with a synthetic swellable fluorine mica having only aluminum.
[0024]
The synthetic swellable fluorine mica of the present invention can be used for ordinary applications such as solid lubricants, thickeners, filler materials, etc., as in the case of conventional tetrasilicon mica. The synthetic swellable fluorine mica of the present invention is a novel substance and includes a swellable mica having an excellent property that has never been obtained.
[0025]
【Example】
EXAMPLES Next, although an Example and a comparative example are given and this invention is further demonstrated, this invention is not limited to these Examples. In the examples, the production rate was measured by the value of cation exchange capacity (CEC), and the swelling power was evaluated based on the standard method defined by the Japan Bentonite Industry Association.
[0026]
Example 1
1 kg of the raw material was blended at a blending ratio shown in Table 1 below, and a swellable synthetic fluorinated mica was synthesized by a fusion synthesis method. About the sample which grind | pulverized the whole collection | recovery obtained, the production rate (CEC) was measured. The results are shown in Table 2 below.
[0027]
Example 2
1 kg of the raw material was blended at a blending ratio shown in Table 1 below, and swellable fluorine mica was synthesized by a fusion synthesis method, and the production rate (CEC) was measured in the same manner as in Example 1. The results are shown in Table 2 below.
[0028]
Example 3
As shown in Table 1 below, 500 kg of the raw material was blended at the same blending ratio as in Example 1, and swellable fluoromica was synthesized by the fusion method, and the production rate (CEC) was measured in the same manner as in Example 1. The results are shown in Table 2 below.
[0029]
Example 4
1 kg of the raw material was blended at a blending ratio shown in Table 1 below, and swellable fluorine mica was synthesized by a fusion synthesis method, and the production rate (CEC) was measured in the same manner as in Example 1. The results are shown in Table 2 below.
[0030]
Comparative Example 1
1 kg of the raw material was blended at a blending ratio shown in Table 1 below, and swellable fluorine mica was synthesized by a fusion synthesis method, and the production rate (CEC) was measured in the same manner as in Example 1. The results are shown in Table 2 below.
[0031]
Comparative Example 2
As shown in Table 1 below, 500 kg of raw materials were blended at the same blending ratio as in Comparative Example 1, and swellable fluoromica was synthesized by the fusion method, and the production rate (CEC) was measured in the same manner as in Example 1. The results are shown in Table 2 below.
[0032]
[Table 1]

[0033]
[Table 2]

As is apparent from Table 2 above, Examples 1 to 4 show significantly higher CEC values than Comparative Examples 1 and 2. This indicates that the production amount per unit mass of the recovered material of the present invention is significantly higher than the production rate of the conventional tetrasilicon mica. In addition, although the swelling property was lower in the Examples than the Comparative Example, all exhibit swelling properties (swelling power: 10 to 15 (cc / 2g)) that can be used industrially as swelling mica. Has been confirmed by experiments.
[0034]
Example 5
1 kg of the raw material was blended at a blending ratio shown in Table 3 below, and swellable fluoromica was synthesized by a fusion synthesis method. About the sample which grind | pulverized the whole collection | recovery obtained, the production rate measurement and swelling power evaluation were performed. The results are shown in Table 4 below.
[0035]
Example 6
1 kg of the raw material was blended at a blending ratio shown in Table 3 below, and swellable fluorine mica was synthesized by the fusion synthesis method, and the production rate was measured and the swelling power was evaluated in the same manner as in Example 5. The results are shown in Table 3 below.
[0036]
Example 7
As shown in Table 3 below, 500 kg of the raw material was blended at the same blending ratio as in Example 6, and a swellable fluorinated mica was synthesized by the fusion method, and the production rate was measured and the swelling power was evaluated in the same manner as in Example 5. It was. The results are shown in Table 3 below.
[0037]
Example 8
1 kg of the raw material was blended at a blending ratio shown in Table 3 below, and swellable fluorine mica was synthesized by the fusion synthesis method, and the production rate was measured and the swelling power was evaluated in the same manner as in Example 5. The results are shown in Table 3 below.
[0038]
Example 9
As shown in Table 3 below, 500 kg of the raw material was blended at the same blending ratio as in Example 4, and swellable fluorine mica was synthesized by the fusion method, and the production rate was measured and the swelling power was evaluated in the same manner as in Example 5. It was. The results are shown in Table 3 below.
[0039]
Example 10
1 kg of the raw material was blended at a blending ratio shown in Table 3 below, and swellable fluoromica was synthesized by a fusion synthesis method. In the same manner as in Example 5, the production rate was measured and the swelling power was evaluated. The results are shown in Table 3 below.
[0040]
Comparative Example 3
1 kg of the raw material was blended at a blending ratio shown in Table 3 below, and swellable fluorine mica was synthesized by the fusion synthesis method, and the production rate was measured and the swelling power was evaluated in the same manner as in Example 5. The results are shown in Table 3 below.
[0041]
Comparative Example 4
1 kg of the raw material was blended at a blending ratio shown in Table 3 below, and swellable fluorine mica was synthesized by the fusion synthesis method, and the production rate was measured and the swelling power was evaluated in the same manner as in Example 5. The results are shown in Table 3 below.
[0042]
Comparative Example 6
As shown in Table 3 below, 500 kg of the raw material was blended at the same blending ratio as in Comparative Example 3, and the swellable fluoromica was synthesized by the fusion synthesis method, and the production rate was measured and the swelling power was evaluated in the same manner as in Example 5. It was. The results are shown in Table 3 below.
[0043]
[Table 3]

[0044]
[Table 4]

[0045]
From the result of the said Table 4, in Examples 5-10 which added lithium in addition to aluminum, both CEC and swelling power are high values compared with the comparative examples 3-5 of the conventional tetrasilicon mica. . From this, it is clear that the swellable mica of the present invention, in which lithium is added in addition to aluminum, not only increases the yield per unit mass of recovered material but also improves the swelling power.
[0046]
In addition, from the amount of lithium added in Examples 5 to 10, Comparative Example 4 and the comparison with Examples 1 to 4 above, addition of lithium not only improves the swellability but also improves the production rate. I understand.
[0047]
【Effect of the invention】
As described above, according to the invention described in claim 1 of the present invention, the production rate per unit weight of the recovered product at the time of synthesis can be remarkably improved as compared with the conventional tetrasilicon mica. It is significantly reduced and, depending on the application, no purification is required. As a result, it shows a great effect that the swellable mica can be industrially provided at a very low cost.
[0048]
Further, according to the invention described in claim 2 , in addition to the effect described in claim 1, there can be obtained an advantage that the swellability can be enhanced as compared with the conventional technique and the production rate can be further improved.

Claims

The chemical composition synthesized by the melting method

(In the formula, the value of X is

A synthetic swellable fluorine mica represented by:

The chemical composition synthesized by the melting method

( Wherein , the value of X ′ is 0.5 ≧ X ′> 0 and the value of Y is 0.8 ≧ Y> 0 ).

A raw material selected from silicon dioxide, magnesium oxide, magnesium fluoride, sodium silicofluoride, sodium fluoride, sodium carbonate, talc, and aluminum oxide is represented by the formula (1):
NaMg _{2.5 + X / 2} (Al _X Si _4-X ) O ₁₀ F ₂
[0.5 ≧ X> 0]
The method for producing a synthetic swellable fluorinated mica according to claim 1, wherein the composition is prepared so as to have a chemical composition of 1 mol.

A raw material selected from silicon dioxide, magnesium oxide, magnesium fluoride, sodium silicofluoride, sodium fluoride, sodium carbonate, talc, aluminum oxide, lithium fluoride, and lithium carbonate is represented by the formula (2):
_{_{_{(Li Y Na 1-Y)}}} Mg 2.5 + X '/ 2 (Al X' Si 4-X ') O 10 F 2
[ 0.8 ≧ Y> 0, 0.5 ≧ X ′> 0]
3. The method for producing a synthetic swellable fluorinated mica according to claim 2, wherein the composition is prepared so as to have a chemical composition of, melted at 1200 to 1600 ° C., and then cooled.