JPH0678975B2 - Measuring method of solid specific gravity - Google Patents
Measuring method of solid specific gravityInfo
- Publication number
- JPH0678975B2 JPH0678975B2 JP63071259A JP7125988A JPH0678975B2 JP H0678975 B2 JPH0678975 B2 JP H0678975B2 JP 63071259 A JP63071259 A JP 63071259A JP 7125988 A JP7125988 A JP 7125988A JP H0678975 B2 JPH0678975 B2 JP H0678975B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- sample
- liquid
- specific gravity
- water
- 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
- 230000005484 gravity Effects 0.000 title claims description 38
- 239000007787 solid Substances 0.000 title claims description 13
- 238000000034 method Methods 0.000 title claims description 12
- 239000007788 liquid Substances 0.000 claims description 41
- 239000000725 suspension Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 70
- 238000005259 measurement Methods 0.000 description 11
- 238000001035 drying Methods 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- 238000007654 immersion Methods 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003758 nuclear fuel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Description
【発明の詳細な説明】 「産業上の利用分野」 この発明は固体比重の測定方法に係わり、特に核燃料棒
内に多数装填される燃料ペレットの比重を測定するもの
に関する。TECHNICAL FIELD The present invention relates to a method for measuring a solid specific gravity, and more particularly to a method for measuring the specific gravity of a large number of fuel pellets loaded in a nuclear fuel rod.
「従来の技術」 従来、燃料ペレットの比重を測定するには、水浸式の固
体比重測定器を用いて行っている。この固体比重測定器
を用いた比重測定は、試料を秤量器の下に吊下治具を用
いて吊下し、この吊下された試料の重量を空気中と液体
中で測定し、この測定された重量の差から試料の体積を
求め比重を求めるものである。"Prior Art" Conventionally, the specific gravity of a fuel pellet is measured using a water-immersion type solid specific gravity measuring instrument. Specific gravity measurement using this solid specific gravity measuring instrument is performed by suspending a sample under a weigher using a suspending jig, and measuring the weight of this suspended sample in air and in a liquid. The specific gravity is obtained by calculating the volume of the sample from the difference in weight.
「発明が解決しようとする課題」 ところで、上記の比重測定方法では、測定の度に試料を
のせ、浸漬して液中重量を測定する吊下治具を都度完全
に乾燥させなければならず、このため測定に多大の時間
を要すると共に、このような測定方法を自動化するに
は、吊下治具を都度取出して乾燥させる乾燥装置等を設
けなければならないので、装置自体が大掛かりなものと
なるばかりでなく、この乾燥装置の熱が精密な測定に悪
影響を及ぼすので、自動化が困難であるという問題点が
あった。"Problems to be solved by the invention" By the way, in the above-described specific gravity measuring method, a sample is placed on each measurement, and the hanging jig for immersing and measuring the weight in liquid must be completely dried each time, For this reason, it takes a lot of time for measurement, and in order to automate such a measuring method, it is necessary to provide a drying device or the like for taking out the hanging jig and drying it each time, so that the device itself becomes large-scale. Not only that, the heat of the drying device adversely affects the precise measurement, which makes it difficult to automate.
「発明の目的」 この発明は上記事情に鑑みてなされたものであり、容易
かつ正確に比重の測定ができると共に、自動化も容易に
行うことができる固体比重の測定方法を提供することを
目的としている。"Object of the Invention" The present invention has been made in view of the above circumstances, and an object thereof is to provide a method for measuring a specific gravity of a solid that can easily and accurately measure the specific gravity and can be easily automated. There is.
「課題を解決するための手段」 この発明の固体比重の測定方法は、容器内に比重ｄの液
体を充填した状態で計量して、上記容器とこの容器内の
液体の重量とを合計した重量W0を計測した後、吊下部に
より試料を挟持し上記容器の液体中に吊下げた状態で計
量して、上記容器の重量とこの容器内の液体の重量と上
記試料の体積に対応する液体の重量と上記吊下部の液体
内に浸漬した部分の体積に対応する液体の重量とを合計
した重量WVを計測し、次いで、上記吊下部による試料の
挟持を解除した状態で計量して、上記容器の重量とこの
容器内の液体の重量と上記試料の重量と上記吊下部の液
体内に浸漬した部分の体積に対応する液体の重量とを合
計した重量WWを計測し、これらの計測した重量W0、WV、
WWと、上記吊下部の液体内に浸漬した部分の体積に対応
する液体の重量WPとに基づいて上記試料の比重Ｓを、 Ｓ＝（WW−W0−WP）d/（WV−W0−WP） により求めることを特徴としている。"Means for Solving the Problem" The method for measuring the specific gravity of a solid according to the present invention is a total weight of the container and the weight of the liquid in the container, which is measured in a state where a liquid having a specific gravity d is filled in the container. After measuring W0, the sample is clamped by the hanging part and weighed in the state of being suspended in the liquid of the container, the weight of the container, the weight of the liquid in the container, and the liquid corresponding to the volume of the sample. The weight WV, which is the sum of the weight and the weight of the liquid corresponding to the volume of the portion immersed in the liquid of the suspension portion, is measured, and then the sample is weighed with the suspension portion released, and the container is , The weight of the liquid in this container, the weight of the sample, and the weight of the liquid corresponding to the volume of the portion of the suspension immersed in the liquid were measured WW, and these measured weights W0 , WV,
Based on WW and the weight WP of the liquid corresponding to the volume of the portion of the suspension that is immersed in the liquid, the specific gravity S of the sample is S = (WW-W0-WP) d / (WV-W0-WP ).
「実施例」 以下この発明の一実施例を第１図ないし第８図を参照し
て説明する。[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 8.
第１図ないし第８図は固体比重測定装置の概略構成を示
すものであり、図において符号１は、デジタル式の秤量
器を示す。この秤量器１の受皿２には水槽（容器）３が
載置されている。この水槽３内には水が充填されると共
に、試料４を載置するためのＶブロック５が載置されて
いる。また、水槽３の上方には、一対の略Ｌ字状をなす
細い針金6,6と、これら針金6,6を上下方向および互いに
接近離間させる方向に移動させる移動部7,7とから構成
された吊下部８が設けられている。1 to 8 show a schematic configuration of a solid-state specific gravity measuring apparatus, and in the figures, reference numeral 1 denotes a digital weighing machine. A water tank (container) 3 is placed on a pan 2 of the weighing device 1. The water tank 3 is filled with water, and a V block 5 for mounting the sample 4 is mounted. Above the water tank 3, a pair of thin wires 6 having a substantially L-shape and moving parts 7, 7 for moving the wires 6, 6 in the vertical direction and in the direction of approaching and separating from each other are provided. A hanging part 8 is provided.
次に、上記構成の装置を用いて試料４の比重を測定する
方法を説明する。Next, a method of measuring the specific gravity of the sample 4 using the apparatus having the above-mentioned configuration will be described.
まず、第１図および第２図に示すように、水が充填され
た水槽３を秤量器１の受皿２に載置して、水槽３の重量
とこの水槽３内の水の重量とを合計した重量W0を秤量器
１により計測した後、第３図および第４図に示すよう
に、この水槽３の上方において試料４を吊下部８の針金
6,6により挟持して吊下し、移動部7,7を降下させること
により試料４を水中に浸漬し、この時の水槽３の重量と
この水槽３内の水の重量と上記試料４の体積に対応する
水の重量と上記針金6,6の水内に浸漬した部分の体積に
対応する水の重量とを合計した重量WVを計測する。First, as shown in FIGS. 1 and 2, the water tank 3 filled with water is placed on the pan 2 of the weighing machine 1, and the weight of the water tank 3 and the weight of the water in the water tank 3 are added together. After the measured weight W0 is measured by the weighing machine 1, the sample 4 is suspended above the water tank 3 as shown in FIGS.
The sample 4 is immersed in water by being sandwiched and hung by 6,6, and the moving parts 7,7 are lowered. The weight of the water tank 3 at this time, the weight of the water in the water tank 3 and the sample 4 The total weight WV of the weight of water corresponding to the volume and the weight of water corresponding to the volume of the portion of the wires 6, 6 immersed in water is measured.
次いで、第５図および第６図に示すように、上記吊下部
８の針金6,6を互いに離間させることにより上記試料４
の挟持を解除して水槽３の底部に設置されたＶブロック
５に試料４を載置し、この時の水槽３の重量とこの水槽
３内の水の重量と上記試料４の重量と上記針金6,6の水
内に浸漬した部分の体積に対応する水の重量とを合計し
た重量WWを計測する。Then, as shown in FIG. 5 and FIG. 6, the wires 6 of the hanging portion 8 are separated from each other to separate the sample 4
The sample 4 is placed on the V block 5 installed at the bottom of the water tank 3 by releasing the sandwiching between the water tank 3, the weight of the water tank 3, the weight of the water in the water tank 3, the weight of the sample 4 and the wire. The weight WW, which is the sum of the weight of water and the weight of water corresponding to the volume of the parts 6 and 6 immersed in water, is measured.
そして、このようにして計測された重量W0、WV、WWと、
上記針金6,6の水内に浸漬した部分の体積に対応する水
の重量WPとに基づいて試料４の比重Ｓを求める。And the weight W0, WV, WW measured in this way,
The specific gravity S of the sample 4 is obtained based on the weight WP of water corresponding to the volume of the portion of the wires 6, 6 immersed in water.
すなわち、一般に、固体比重Ｓは、 Ｓ＝W1・d/（W1−W2） …… で表される。なお、式におけるW1、W2、ｄは、 W1:空気中における固体の重量、 W2:液体中における固体の重量、 d:液体の比重、 である。That is, in general, the solid specific gravity S is represented by S = W 1 · d / (W 1 −W 2 ). In the formula, W 1 , W 2 and d are W 1 : weight of solid in air, W 2 : weight of solid in liquid, d: specific gravity of liquid.
また、W1およびW2を上記W0、WV、WWを用いて表すと、 W1＝WW−W0−WP ……、 であり、またアルキメデスの原理により、 W2＝WW−WV ……、である。Further, when W 1 and W 2 are expressed by using W 0, WV, and WW, W 1 = WW−W0−WP ……, and by Archimedes' principle, W 2 = WW−WV ……, is there.
したがって、式に式および式を代入すると、 Ｓ＝（WW−W0−WP）d/（WV−W0−WP） ……が得られ
る。Therefore, by substituting the equation and the equation into the equation, S = (WW-W0-WP) d / (WV-W0-WP).
そして、式に、計測された数値を代入して試料４の比
重を求める。Then, the measured value is substituted into the formula to obtain the specific gravity of the sample 4.
また、比重測定が終了した試料４は第７図および第８図
に示すように、吊下部８により水槽３外に取り出される
が、この時、試料４に水槽３内の水の一部が付着して外
部に取り出されて、水槽３の重量とこの水槽３内の水の
重量とを合計した重量が当初のW0より減少したW0′とな
る。しかしこの発明の比重測定方法では、このW0′を次
の試料４の比重測定における基準値（W0）にすることが
できるので、水槽３内の水量の増減に影響されることな
く比重を測定することができる。Further, as shown in FIGS. 7 and 8, the sample 4 whose specific gravity has been measured is taken out of the water tank 3 by the hanging portion 8. At this time, part of the water in the water tank 3 adheres to the sample 4. Then, it is taken out to the outside, and the total weight of the weight of the water tank 3 and the weight of the water in the water tank 3 becomes W0 ′ which is smaller than the initial W0. However, in the specific gravity measuring method of the present invention, this W0 'can be used as the reference value (W0) in the specific gravity measurement of the next sample 4, so that the specific gravity is measured without being affected by the increase or decrease in the amount of water in the water tank 3. be able to.
また、試料４の保持に使用している針金6,6は、水に浸
る部分が少なく、水滴がつきにくいため、次の試料４を
吊下げる間に自然乾燥してしまい強制乾燥の必要はな
い。Further, the wires 6 and 6 used for holding the sample 4 do not need to be forcibly dried because they are naturally dried while the next sample 4 is hung because there are few parts soaked in water and water droplets are hard to attach. .
なお、上記式においてはアルキメデスの原理に基づい
て、水中における試料４の重量W2を、吊下部８による試
料４の挟持を解除した状態における試料４の重量と、吊
下部８の針金6,6により試料４を挟持して水槽３の水中
に吊下げた状態における試料４の体積に対応する液体の
重量との差から求めるようにしている。従って、重量WW
における水槽３の重量とこの水槽３内の水の重量と針金
6,6の水内に浸漬した部分の体積に対応する水の重量
と、重量WVにおける水槽３の重量とこの水槽３内の水の
重量と針金6,6の水内に浸漬した部分の体積に対応する
水の重量とは、式において互いに相殺されることとな
る。ここで、水槽３の重量とこの水槽３内の水の重量と
は変動することがないから、重量WWと重量WVとにおける
針金6,6の水内に浸漬した部分の体積に対応する水の重
量も互いに等しくなり、すなわち針金6,6の水内に浸漬
する部分の体積が等しくなる。このため、重量WWを計測
する際と重量WVを計測する際とにおいて吊下部８は、第
３図および第４図と第５図および第６図とに示されるよ
うに、その針金6,6の水槽３内の水への浸漬深さが一致
するように取り扱われることとなる。In the above formula, based on the Archimedes principle, the weight W 2 of the sample 4 in water is calculated based on the weight of the sample 4 in a state in which the sample 4 is not clamped by the hanging part 8 and the wires 6, 6 of the hanging part 8. Thus, it is determined from the difference between the sample 4 and the weight of the liquid corresponding to the volume of the sample 4 in the state where the sample 4 is held in the water tank 3 and suspended in water. Therefore, the weight WW
Weight of water tank 3 and weight of water in this water tank 3 and wire
The weight of water corresponding to the volume of the portion of 6,6 immersed in water, the weight of the water tank 3 in weight WV, the weight of water in this water tank 3, and the volume of the portion of wire 6,6 immersed in water The weights of water corresponding to will cancel each other out in the equation. Here, since the weight of the water tank 3 and the weight of the water in the water tank 3 do not fluctuate, the water corresponding to the volume of the portion of the wires 6, 6 immersed in the water in the weight WW and the weight WV. The weights are also equal to each other, that is, the volumes of the portions of the wires 6, 6 to be immersed in water are equal. Therefore, when measuring the weight WW and when measuring the weight WV, the hanging part 8 has its wires 6, 6 as shown in FIGS. 3 and 4 and FIGS. 5 and 6. Will be handled so that the immersion depths in the water in the water tank 3 are the same.
しかして、上記固体比重の測定方法によれば、試料４を
水中に浸漬する前、試料４を吊下部８により水中に吊下
した時、および試料４を水槽３内のＶブロック５に載置
した時のそれぞれの状態において、秤量器１により上記
各重量を計量し、これら計測値に基づいて試料４の比重
を求めるようにしたので、試料４の比重を正確かつ容易
に求めることができる。よって、試料吊下部に試料を載
せる必要がなく針金6,6のみで測定できるため、従来の
水浸式の固体比重測定器のように、試料を吊下する吊下
部８を測定の度に乾燥させる必要性がなく、この結果、
装置を小型化でき、測定に要する時間を大幅に縮減する
ことができると共に、特に乾燥装置を必要とせず、また
この乾燥装置による熱が精密な測定に悪影響を及ぼすこ
ともないので、容易に比重測定の自動化を図ることがで
きる。Therefore, according to the above-mentioned method for measuring the solid specific gravity, before the sample 4 is immersed in water, when the sample 4 is suspended in water by the suspension part 8, and the sample 4 is placed on the V block 5 in the water tank 3. In each of the above states, the respective weights are weighed by the weighing machine 1 and the specific gravity of the sample 4 is determined based on these measured values. Therefore, the specific gravity of the sample 4 can be determined accurately and easily. Therefore, it is not necessary to place the sample on the sample suspension part, and it is possible to measure with only the wires 6,6. Therefore, the suspension part 8 for suspending the sample is dried at each measurement like the conventional water immersion type solid specific gravity measuring instrument. As a result, there is no need to let
The device can be downsized, the time required for measurement can be greatly reduced, and since a drying device is not particularly required and the heat from this drying device does not adversely affect the precise measurement, the specific gravity is easy. It is possible to automate the measurement.
「発明の効果」 以上説明したように、この発明の固体比重の測定方法
は、容器内に比重ｄの液体を充填した状態で計量して、
上記容器とこの容器内の液体の重量とを合計した重量W0
を計測した後、吊下部により試料を挟持し上記容器の液
体中に吊下げた状態で計量して、上記容器の重量とこの
容器内の液体の重量と上記試料の体積に対応する液体の
重量と上記吊下部の液体内に浸漬した部分の体積に対応
する液体の重量とを合計した重量WVを計測し、次いで、
上記吊下部による試料の挟持を解除した状態で計量し
て、上記容器の重量とこの容器内の液体の重量と上記試
料の重量と上記吊下部の液体内に浸漬した部分の体積に
対応する液体の重量とを合計した重量WWを計測し、これ
らの計測した重量W0、WV、WWと、上記吊下部の液体内に
浸漬した部分の体積に対応する液体の重量WPとに基づい
て上記試料の比重Ｓを、 Ｓ＝（WW−W0−WP）d/（WV−W0−WP） により求めるものであるから、試料を吊下部により挟持
して水槽内の液体中に浸漬し、次いで、挟持を解除して
水槽内に載置し、さらに、上記吊下部により試料を挟持
して水槽外に取り出す一連の操作を行なうだけで、面倒
な試料の移し替え等のハンドリング操作を極力なくすこ
とができると共に、精度良く試料の比重を測定すること
ができる。"Effects of the Invention" As described above, the method for measuring a specific gravity of a solid according to the present invention is performed by measuring with a liquid filled with a specific gravity d in a container,
Weight W0 that is the sum of the weight of the above container and the liquid in this container
After measuring, the sample is clamped by the hanging part and weighed in the state of being suspended in the liquid of the container, the weight of the container, the weight of the liquid in the container, and the weight of the liquid corresponding to the volume of the sample. And the weight WV of the total weight of the liquid corresponding to the volume of the portion immersed in the liquid of the suspension portion, and then,
A sample corresponding to the weight of the container, the weight of the liquid in the container, the weight of the sample, and the volume of the portion of the suspension immersed in the liquid is measured with the sample held by the suspension being released. The total weight WW of the samples is measured, and these measured weights W0, WV, WW and the weight WP of the liquid corresponding to the volume of the portion of the suspension immersed in the liquid Since the specific gravity S is obtained by S = (WW-W0-WP) d / (WV-W0-WP), the sample is clamped by the suspension part, immersed in the liquid in the water tank, and then clamped. It is possible to eliminate troublesome handling operations such as transfer of samples as much as possible by simply releasing and placing in the water tank, and further performing a series of operations to clamp the sample by the above hanging part and take it out of the water tank. The specific gravity of the sample can be accurately measured.
なお、上記実施例では、この発明を核燃料ペレットの比
重測定に適用したが、これに限ることなく一般産業分野
において、精密な比重測定が必要とされる種々のものに
適用することができる。Although the present invention is applied to the measurement of the specific gravity of the nuclear fuel pellets in the above-mentioned embodiments, the present invention is not limited to this and can be applied to various kinds of fields requiring precise specific gravity measurement in the general industrial field.
第１図ないし第８図はこの発明の一実施例を示すもので
あり、第１図は試料を水中に浸漬する前の状態を示す概
略構成正面図、第２図は同側面図、第３図は試料を吊下
部により水中に吊下した状態を示す概略構成正面図、第
４図は同側面図、第５図は試料を水槽内のＶブロックに
載置した状態を示す概略構成正面図、第６図は同側面
図、第７図は試料を水槽外に取り出した状態を示す概略
構成正面図、第８図は同側面図である。 １……秤量器、３……水槽（容器）、 ４……試料、８……吊下部。1 to 8 show an embodiment of the present invention. FIG. 1 is a schematic configuration front view showing a state before a sample is immersed in water, FIG. 2 is a side view of the same, and FIG. The figure is a schematic configuration front view showing a state in which a sample is suspended in water by a suspension portion, FIG. 4 is a side view of the same, and FIG. 5 is a schematic configuration front view showing a state in which a sample is placed on a V block in a water tank. FIG. 6 is a side view of the same, FIG. 7 is a schematic configuration front view showing a state in which the sample is taken out of the water tank, and FIG. 8 is a side view of the same. 1 ... Weigher, 3 ... Water tank (container), 4 ... Sample, 8 ... Suspended part.
Claims (1)
量して、上記容器の重量とこの容器内の液体の重量とを
合計した重量W0を計測した後、吊下部により試料を狭持
し上記容器の液体中に吊下げた状態で計量して、上記容
器の重量とこの容器内の液体の重量と上記試料の体積に
対応する液体の重量と上記吊下部の液体内に浸漬した部
分の体積に対応する液体の重量とを合計した重量WVを計
測し、次いで、上記吊下部による試料の狭持を解除した
状態で計量して、上記容器の重量とこの容器内の液体の
重量と上記試料の重量と上記吊下部の液体内に浸漬した
部分の体積に対応する液体の重量とを合計した重量WWを
計測し、これらの計測した重量W0、WV、WWと、上記吊下
部の液体内に浸漬した部分の体積に対応する液体の重量
WPとに基づいて上記試料の比重Ｓを、 Ｓ＝（WW−W0−WP）d/（WV−W0−WP） により求めることを特徴とする固体比重の測定方法。1. A container is filled with a liquid having a specific gravity d and is weighed to measure a total weight W0 of the weight of the container and the liquid in the container. Hold and weigh in a state of being suspended in the liquid of the container, and immersed in the weight of the container, the weight of the liquid in the container, the weight of the liquid corresponding to the volume of the sample, and the liquid in the hanging portion. The weight WV, which is the sum of the weight of the liquid corresponding to the volume of the part, is measured, and then the weight of the container and the liquid in the container are weighed with the suspension of the sample released. And the weight of the sample and the weight of the liquid corresponding to the volume of the portion of the suspension immersed in the liquid was measured WW, these measured weight W0, WV, WW, and the suspension Weight of liquid corresponding to the volume of the part immersed in the liquid
The specific gravity S of the sample is determined by S = (WW-W0-WP) d / (WV-W0-WP) based on WP and the solid specific gravity measuring method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63071259A JPH0678975B2 (en) | 1988-03-25 | 1988-03-25 | Measuring method of solid specific gravity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63071259A JPH0678975B2 (en) | 1988-03-25 | 1988-03-25 | Measuring method of solid specific gravity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01244336A JPH01244336A (en) | 1989-09-28 |
| JPH0678975B2 true JPH0678975B2 (en) | 1994-10-05 |
Family
ID=13455545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63071259A Expired - Lifetime JPH0678975B2 (en) | 1988-03-25 | 1988-03-25 | Measuring method of solid specific gravity |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0678975B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT388554B (en) * | 1987-12-11 | 1989-07-25 | Vianova Kunstharz Ag | METHOD FOR PRODUCING ALKENYLSBERSTAIC ACID ANHYDRIDES WITH IMPROVED OWN COLOR |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002243614A (en) * | 2001-02-14 | 2002-08-28 | Mirage Boeki Kk | Specific gravity measuring device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0213961Y2 (en) * | 1980-01-29 | 1990-04-17 |
-
1988
- 1988-03-25 JP JP63071259A patent/JPH0678975B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT388554B (en) * | 1987-12-11 | 1989-07-25 | Vianova Kunstharz Ag | METHOD FOR PRODUCING ALKENYLSBERSTAIC ACID ANHYDRIDES WITH IMPROVED OWN COLOR |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01244336A (en) | 1989-09-28 |
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