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A kind of preparation method of PVDC composition for carbon molecular sieve

A technology of carbon molecular sieve and composition, applied in the field of preparation of PVDC composition, can solve the problems of small apparent density and micropore volume of PVDC composition, unsuitable for PVDC carbon molecular sieve, restricting the application field of PVDC composition, etc. The effect of stable polymerization process, excellent product performance and mild reaction

Active Publication Date: 2016-03-16
ZHEJIANG QUZHOU JUSU CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the apparent density and pore volume of the prepared PVDC composition are small, and it is not suitable for making PVDC carbon molecular sieves for gas adsorption, which limits the application fields of PVDC compositions

Method used

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  • A kind of preparation method of PVDC composition for carbon molecular sieve
  • A kind of preparation method of PVDC composition for carbon molecular sieve
  • A kind of preparation method of PVDC composition for carbon molecular sieve

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example 1

[0039] A kind of preparation method of PVDC composition for carbon molecular sieve, comprises the following steps:

[0040] (1) Prepare the reaction raw materials for subsequent use, and the reaction raw materials consist of:

[0041]

[0042] (2) Preparation of pH buffer regulator aqueous solution and dispersant aqueous solution: Sodium pyrophosphate 1.6kg and disodium hydrogen phosphate 0.4kg, deionized water 20kg are mixed with pH buffer regulator aqueous solution; Methyl cellulose ether 2.5kg, deionized 375kg of ionized water is prepared into aqueous solution of dispersant;

[0043] (3) Preparation of nanofiller aqueous solution: 1.8kg of nano silicon dioxide and 88.2kg of deionized water are prepared into nanofiller aqueous solution;

[0044] (4) Add 257.3kg deionized water and pH buffer regulator aqueous solution to 3M 3 In the polymerization kettle (stainless steel polymerization kettle with stirring device, length-to-diameter ratio of 2:1, three-leaf anchor paddle),...

example 2

[0046] A kind of preparation method of PVDC composition for carbon molecular sieve, comprises the following steps:

[0047] (1) Prepare the reaction raw materials for subsequent use, and the reaction raw materials consist of:

[0048]

[0049]

[0050] (2) Preparation of pH buffer regulator aqueous solution and dispersant aqueous solution: Sodium pyrophosphate 1kg, deionized water 12.5kg are mixed with pH buffer regulator aqueous solution; Hydroxypropyl methylcellulose 1.9kg, deionized water 285kg are formulated into ingredients Aqueous solution of powder;

[0051] (3) Prepare nanofiller aqueous solution: 1kg nanometer calcium carbonate, 49kg deionized water are mixed with nanofiller aqueous solution;

[0052] (4) Add 129.4kg deionized water and pH buffer regulator aqueous solution to 3M 3 In the polymerization kettle (stainless steel polymerization kettle with stirring device, length-to-diameter ratio of 2:1, three-leaf anchor paddle), the kettle is sealed and replace...

example 3

[0055] A kind of preparation method of PVDC composition for carbon molecular sieve, comprises the following steps:

[0056] (1) Prepare the reaction raw materials for subsequent use, and the reaction raw materials consist of:

[0057]

[0058] (2) Prepare pH buffer regulator aqueous solution and dispersant aqueous solution: disodium dihydrogen pyrophosphate 0.6kg, deionized water 7.5kg are mixed with pH buffer regulator aqueous solution; Methyl cellulose 0.8kg, deionized water 134.4kg Prepared as an aqueous solution of dispersant;

[0059] (3) Preparation of nanofiller aqueous solution: 0.4kg nanometer titanium dioxide, 19.6kg deionized water are mixed with nanofiller aqueous solution;

[0060] (4) Add 102.4kg deionized water and pH buffer regulator aqueous solution to 3M 3 In the polymerization kettle (stainless steel polymerization kettle with stirring device, length-to-diameter ratio of 2:1, three-leaf anchor paddle), the kettle is sealed and replaced with nitrogen for...

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Abstract

The invention discloses a preparation method of a PVDC (polyvinyl dichloride) composition for a carbon molecular sieve. The preparation method comprises the following steps of adding 160-165 parts (in parts by weight) of deionized water, 0.07-0.35 part of a dispersing agent, 0.2-0.5 part of an initiator, 0.04-0.25 part of a pH buffer regulator, 70-100 parts of a vinylidene chloride monomer and 0.05-0.25 part of nano filler into a polymerization kettle; ending polymerization reaction after carrying out polymerization reaction for 8-15 hours at 45-65 DEG C under stirring; removing residual monomers in vacuum, cooling and discharging, centrifuging, and drying to obtain the PVDC composition for the carbon molecular sieve. The preparation method disclosed by the invention has the advantages of simple process and good performance of prepared products.

Description

technical field [0001] The invention relates to a method for preparing a PVDC composition, more specifically, the invention relates to a method for preparing a PVDC composition for carbon molecular sieves. Background technique [0002] Polyvinylidene chloride (PVDC) is a homopolymer of vinylidene chloride (VDC) or a polymer formed by copolymerization of vinylidene chloride as the main component and other monomers. Due to the symmetrical structure of the molecular chain and the presence of hydrophobic base chlorine, PVDC has high crystallinity and melting point, good water and oxygen barrier properties, and the gas barrier property is not affected by ambient humidity. It is widely used in chemical industry, light Industry, packaging, food and other fields. [0003] PVDC with large apparent density and micropore volume, high melting point, low volatile matter content, and high three-mesh concentration rate produces porous non-graphitizable carbon with a highly cross-linked st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F114/08C08F214/08C08F214/06C08F220/14C08F220/44C08F2/44C08K3/36C08K3/26C08K3/22
Inventor 吴宇鹏韩金铭邓建明马季郑九丽苏兰辉吕颖琦苏刚
Owner ZHEJIANG QUZHOU JUSU CHEM IND CO LTD
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