JPH0687941B2 - Hygroscopic agent - Google Patents
Hygroscopic agentInfo
- Publication number
- JPH0687941B2 JPH0687941B2 JP58077582A JP7758283A JPH0687941B2 JP H0687941 B2 JPH0687941 B2 JP H0687941B2 JP 58077582 A JP58077582 A JP 58077582A JP 7758283 A JP7758283 A JP 7758283A JP H0687941 B2 JPH0687941 B2 JP H0687941B2
- Authority
- JP
- Japan
- Prior art keywords
- zeolite
- hygroscopic agent
- refrigerant
- weight
- sol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Drying Of Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
【発明の詳細な説明】 本発明は吸湿剤、特にカークーラー用の冷媒に含まれる
水分を吸収せしめる吸湿剤に係るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hygroscopic agent, particularly to a hygroscopic agent that absorbs water contained in a refrigerant for a car cooler.
カークーラーの冷媒にはフロンガス（フロン12）が通常
用いられている。そしてこのクーラーは振動に耐える
為、特に配管系に合成樹脂製等のパイプが用いられてい
る。この為、このパイプを通してどうしても冷媒中に大
気中の水分が持ち込まれる。これをそのままにしておく
と一部冷媒が分解され、冷却能力の低減を招来せしめ
る。従来、かかる不都合に対処する為、比較的低湿度に
対し効果的な水分吸着能を示すゼオライトを冷媒留に入
れて水分の吸着除去を行なうようになされてきた。Freon gas (Freon 12) is usually used as the refrigerant for the car cooler. Since this cooler withstands vibrations, a pipe made of synthetic resin or the like is used for the piping system. Therefore, moisture in the atmosphere is inevitably brought into the refrigerant through this pipe. If this is left as it is, a part of the refrigerant is decomposed and the cooling capacity is reduced. In the past, in order to deal with such inconvenience, it has been attempted to adsorb and remove water by putting zeolite showing a water adsorbing ability effective in a relatively low humidity into a refrigerant fraction.
しかしながら、この方法はゼオライトが十分水分の吸着
能を有している間は有効手段であるが、ゼオライトの吸
着能が低下してくるにつれて冷媒中の水分によつて冷媒
が一部分解を受け、酸が生成し、これがゼオライトを一
部侵蝕し粉状体が生成する。この粉状体は配管や伝熱面
を詰めたり覆つたりしてクーラーの機能を著しく低下せ
しめる欠点を有している。However, this method is an effective means as long as the zeolite has sufficient water adsorption capacity, but as the zeolite adsorption capacity decreases, the water in the refrigerant partially decomposes the refrigerant, and the acid Are produced, which partially erode the zeolite to produce powder. This powdery material has a drawback that the function of the cooler is significantly deteriorated by filling or covering the pipe and the heat transfer surface.
本発明者はかかる欠点に対処し、冷媒中の水分を有効に
且長期間にわたり吸着除去し得る手段を見出すことを目
的として種々研究、検討した結果、本来低湿度雰囲気中
ではあまり有効な吸湿能を示さない処のシリカゲルを併
用することにより、前記目的を達成し得ることを見出し
た。かくして本発明は、ゼオライトを分散させたシリカ
ゾルをゲル化して得た単一成形体であつて、かつ、シリ
カゲルとゼオライトとの混合割合は全重量に対してゼオ
ライトが10〜60重量％であるクーラー冷媒用吸湿剤を提
供することにある。The present inventor has variously studied and studied for the purpose of finding a means capable of effectively adsorbing and removing water in a refrigerant over a long period of time in order to deal with such a drawback, and as a result, originally, a hygroscopic ability which is not so effective in a low humidity atmosphere. It was found that the above object can be achieved by using in combination with silica gel which does not show. Thus, the present invention is a single molded body obtained by gelling silica sol in which zeolite is dispersed, and the mixing ratio of silica gel and zeolite is 10 to 60% by weight of zeolite based on the total weight of the cooler. To provide a hygroscopic agent for a refrigerant.
本発明において用いられるクーラー冷媒用吸湿剤のシリ
カゲルとゼオライトとの混合割合が前記範囲を逸脱する
場合には、ゼオライトの好ましい吸湿性が阻害された
り、ゼオライトの酸による粉化を実質的に防止し得ない
虞れがあるので好ましくない。When the mixing ratio of the silica gel and the zeolite of the moisture absorbent for the cooler refrigerant used in the present invention deviates from the above range, the preferred hygroscopicity of the zeolite is inhibited, or the zeolite is substantially prevented from being powdered by an acid. It is not preferable because there is a risk of not being obtained.
本発明の吸湿剤は、ゼオライトを分散させたシリカゾル
をゲル化する方法で製造する。具体的には、次の様な手
段を採用するのが好ましい。珪酸アルカリ水溶液と酸と
を放出口を有する容器内に別個の導入口から同時に導入
して例えばSiO2濃度に換算して130〜175g/、pH6〜11.
5程度で１〜２秒以内にゲル化し得るシリカゾルを生成
せしめ、該ゾルを前記放出口から空気中に放出させてゲ
ル化せしめる。そしてこのとき、かかるゾル中若しくは
別のノズル等によつて所定量のゼオライトをゾル中に混
入せしめ、ゾルのゲル化によつてシリカゲル中に混入せ
しめる。The hygroscopic agent of the present invention is produced by a method of gelling silica sol in which zeolite is dispersed. Specifically, it is preferable to adopt the following means. Simultaneously introducing an alkaline silicate aqueous solution and an acid into a container having a discharge port from separate inlets, for example, 130 to 175 g / pH 6 to 11 in terms of SiO 2 concentration.
A silica sol capable of gelling is formed within about 1 to 2 seconds at about 5, and the sol is discharged into the air from the discharge port to cause gelation. Then, at this time, a predetermined amount of zeolite is mixed into the sol through such a sol or another nozzle, and mixed into the silica gel through gelation of the sol.
このとき用いられるゼオライトとしては特に制限はな
く、各種天然若しくは合成ゼオライトを適宜採用するこ
とができる。ゼオライトは水分を吸着し得るものであれ
ばよく、この為それ程高級なゼオライトを特に用いる必
要はない。合成ゼオライトは適宜公知の手段により珪酸
源と苛性ソーダを用い、水熱合成せしめることができ
る。The zeolite used at this time is not particularly limited, and various natural or synthetic zeolites can be appropriately adopted. Zeolites are only required to be able to adsorb water, and therefore, it is not necessary to use such high-grade zeolite. The synthetic zeolite can be hydrothermally synthesized by a known method using a silicic acid source and caustic soda.
次に本発明を実施例により説明する。Next, the present invention will be described with reference to examples.
実施例１ 珪酸ソーダ，水酸化アルミニウム，苛性ソーダを出発原
料とし、常法に従って水熱合成された粒径１〜５μの4A
型の合成ゼオライトを、スラリー濃度20％に調整しこれ
を最終製品の乾量に対し40重量％となるように噴出容器
の一つの入口から導入し、又別の入口からSiO2換算20重
量％の珪酸ソーダ水溶液を、又別の入口から20重量％の
硫酸を夫々同時に導入混合することにより、SiO2 150g/
,pH7.3のゾルを得、噴出容器に設けられた内径3mm、
長さ20cmのポリプロピレン製ノズルから空気中に噴出さ
せ、２秒間滞留させることによりゲル化せしめた。この
ゲルはそのpHが4.5に維持される様に硫酸浴中に５時間
浸漬後、水道水で７時間水洗し、180℃で６時間乾燥し
た。この結果、シリカゲルとゼオライトとが混合された
単一成形体が得られた。この成形体を27℃で一定の関係
湿度に調整された空気中に48時間曝露し、前後の重量を
測定することにより水分吸着量を求め下表に示す結果を
得た。Example 1 4A having a particle size of 1 to 5 μ and hydrothermally synthesized according to a conventional method using sodium silicate, aluminum hydroxide and caustic soda as starting materials.
-Type synthetic zeolite is adjusted to a slurry concentration of 20%, and this is introduced from one inlet of the ejection container so as to be 40% by weight with respect to the dry weight of the final product, and from another inlet 20% by weight in terms of SiO 2 150 wt.% Of SiO 2 by simultaneously introducing and mixing 20% by weight sulfuric acid from another inlet, respectively.
, sol of pH 7.3 was obtained, and the inner diameter of the squirt container was 3 mm,
A polypropylene nozzle having a length of 20 cm was jetted into the air and allowed to stay for 2 seconds to be gelated. The gel was immersed in a sulfuric acid bath for 5 hours so that its pH was maintained at 4.5, washed with tap water for 7 hours, and dried at 180 ° C. for 6 hours. As a result, a single molded body in which silica gel and zeolite were mixed was obtained. This molded body was exposed to air at 27 ° C. and adjusted to a constant relative humidity for 48 hours, and the weight before and after it was measured to determine the water adsorption amount, and the results shown in the table below were obtained.
関係湿度（％） 水分吸着率（％） 20 14.2 50 30.5 90 38.2Related humidity (%) Moisture adsorption rate (%) 20 14.2 50 30.5 90 38.2
Claims (1)
化して得た単一成形体であって、かつ、シリカゲルとゼ
オライトとの混合割合は全重量に対してゼオライトが10
〜60重量％であるクーラー冷媒用吸湿剤。1. A single molded product obtained by gelling a silica sol in which zeolite is dispersed, and the mixing ratio of silica gel and zeolite is 10 zeolite based on the total weight.
Hygroscopic agent for cooler refrigerant which is up to 60% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58077582A JPH0687941B2 (en) | 1983-05-04 | 1983-05-04 | Hygroscopic agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58077582A JPH0687941B2 (en) | 1983-05-04 | 1983-05-04 | Hygroscopic agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59203638A JPS59203638A (en) | 1984-11-17 |
| JPH0687941B2 true JPH0687941B2 (en) | 1994-11-09 |
Family
ID=13637974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58077582A Expired - Lifetime JPH0687941B2 (en) | 1983-05-04 | 1983-05-04 | Hygroscopic agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0687941B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPQ219399A0 (en) * | 1999-08-13 | 1999-09-02 | Currumbin Sand & Gravel Pty Ltd | Improvements to hydrated aluminosilicates |
| FR2918579B1 (en) * | 2007-07-13 | 2010-01-01 | Air Liquide | PROCESS FOR PURIFYING CO2-CONTAINING GAS BY INTEGRATION OF ADSORPTION PURIFICATION UNIT |
| CN109331619A (en) * | 2018-09-04 | 2019-02-15 | 江苏兆佳建材科技有限公司 | A kind of bentonite efficient drying agent |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS529301B2 (en) * | 1972-09-02 | 1977-03-15 | ||
| JPS5062188A (en) * | 1973-10-04 | 1975-05-28 |
-
1983
- 1983-05-04 JP JP58077582A patent/JPH0687941B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59203638A (en) | 1984-11-17 |
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