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Polymer production method and polymer cleaning device

A manufacturing method and a cleaning device technology, which are applied in the field of polymer manufacturing and polymer cleaning devices, can solve problems such as time-consuming and labor-intensive problems, and achieve the effects of reducing recycling losses and shortening the time of washing processes

Active Publication Date: 2016-01-27
KUREHA KAGAKU KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the cleaning treatment method described in Patent Document 1, since the process of removing the water layer without using a filter material and the process of removing the water layer using a filter material are performed using different devices, it takes time and effort.

Method used

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  • Polymer production method and polymer cleaning device
  • Polymer production method and polymer cleaning device
  • Polymer production method and polymer cleaning device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] Inward volume 10m 36,091 kg of water, 100 kg of methyl cellulose aqueous solution (methyl cellulose concentration 1.43% by mass), 2,850 kg of vinylidene fluoride, 17.2 kg of di-n-propyl peroxydicarbonate, 35.1 kg of ethyl acetate were charged into the polymerization tank , Suspension polymerization was carried out at 25° C. for 11 hours. Cleaning of the polymerized vinylidene fluoride polymer is performed using a cleaning device having the same configuration as the cleaning device 100 shown in the above-mentioned embodiment. Accordingly, corresponding parts are described by appending appropriate part numbers.

[0120] (filter material)

[0121] A sintered body of a SUS304 / SUS316L stainless steel wire mesh with 20, 30, 60, 200, 30, and 20 meshes in this order from the top was used. Among them, a porous plate is arranged at the lower part of the filter material.

[0122] First, after the polymerization is completed, the polymer slurry is transferred to the cleaning ta...

Embodiment 2

[0132] In Example 1, the same operation as in Example 1 was performed except that the first step was continuously repeated three times, followed by the second step, and the third step was continuously repeated twice. As a result, 2,353 kg of vinylidene fluoride polymer was obtained. In addition, as a result of measuring the color difference (b value), the b value was +1.89. Here, the b value is measured by heating and melting the dried vinylidene fluoride polymer powder at 240° C. for 10 minutes to form a pellet of 50 mm×50 mm×3 mm. The measurement of the b value was carried out by placing the center of the tablet in the opening of a color difference meter (ZE2000 manufactured by Nippon Denshoku Industries Co., Ltd.) and measuring the color tone. Wherein, the b value used in this embodiment is the b value in the L*a*b* colorimetric system.

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Abstract

The utility model provides a polymer cleaning device. The polymer cleaning device (100) comprises a cleaning trough (50), a filter material (10), and a pedestal (4) arranged at the lower part of the filter material (10) and used for holding the filter material (10), wherein a through hole (5), through which liquid ingredients of an object to be cleaned can pass when filtering is not carried out, is formed in the filter material (10); a first drain hole (7) is formed in the pedestal (4) in a position superposed with the through hole (5); a second drain hole (6) is formed in the pedestal (4) at a position which is not superposed with the through hole (5).

Description

technical field [0001] The present invention relates to a polymer manufacturing method and a polymer cleaning device. Background technique [0002] In the production method of vinylidene fluoride-based polymers, the vinylidene fluoride polymer obtained by the suspension polymerization method is repeatedly washed with pure water or the like after polymerization to remove impurities such as organic substances adhering to the polymer. . Then, it is recovered as a powder through a dehydration process by a dehydrator and a drying process by a drier. [0003] As a cleaning treatment method for polymers obtained by suspension polymerization, Patent Document 1 discloses a method of (a) allowing the reaction mixture obtained by suspension polymerization to stand, removing the water phase, and obtaining porous polymer particles. Cake, (b) disintegrate the filter cake, suspend the porous polymer particles in water and let stand to remove the water phase, (c) disintegrate the filter c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F14/22C08F6/24
Inventor 轰麻优子作山晃原健二郎根本义德根本辉靖
Owner KUREHA KAGAKU KOGYO KK
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