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Preparation method of PVDC composition for carbon molecular sieve

A carbon molecular sieve and composition technology, applied in the field of preparation of PVDC composition for carbon molecular sieve, can solve the problem of unsuitable PVDC carbon molecular sieve, small apparent density and micropore volume of PVDC composition, limited application field of PVDC composition, etc. problem, to achieve the effect of excellent product performance

Inactive Publication Date: 2015-11-25
HUZHOU XINAOLI ADSORPTION MATERIALS
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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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The preparation steps are as follows:

[0049] (1) Prepare the reaction raw materials for subsequent use, and the reaction raw materials are composed of: 70 parts of vinylidene chloride monomers; 5 parts of comonomers; 7 parts of dispersants; 10 parts of initiators; 3 parts of pH buffer regulators; 5 parts of nano fillers ;

[0050] (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;

[0051] (3) Preparation of nanofiller aqueous solution: 1.8kg of nano silicon dioxide and 88.2kg of deionized water are prepared into nanofiller aqueous solution;

[0052] (4) Add 257.3 kg of deionized water and pH buffer regulator aqueous solution to a 3M3 polymerization kettle (stainless steel polymeriza...

Embodiment 2

[0055] The preparation steps are as follows:

[0056] (1) Prepare the reaction raw materials for subsequent use, and the reaction raw materials are composed of: 75 parts of vinylidene chloride monomers; 10 parts of comonomers; 2 parts of dispersants; 3 parts of initiators; 5 parts of pH buffer regulators; 5 parts of nano fillers ;

[0057] (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;

[0058] (3) Preparation of nanofiller aqueous solution: 1.8kg of nano silicon dioxide and 88.2kg of deionized water are prepared into nanofiller aqueous solution;

[0059] (4) Add 257.3 kg of deionized water and pH buffer regulator aqueous solution to a 3M3 polymerization kettle (stainless steel polymeri...

Embodiment 3

[0062] The preparation steps are as follows:

[0063] (1) Prepare the reaction raw materials for subsequent use, and the reaction raw materials are composed of: 80 parts of vinylidene chloride monomer; 6 parts of comonomer; 4 parts of dispersant; 8 parts of initiator; 1 part of pH buffer regulator; ;

[0064] (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;

[0065] (3) Preparation of nanofiller aqueous solution: 1.8kg of nano silicon dioxide and 88.2kg of deionized water are prepared into nanofiller aqueous solution;

[0066] (4) Add 257.3 kg of deionized water and pH buffer regulator aqueous solution to a 3M3 polymerization kettle (stainless steel polymerization kettle with stirring dev...

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Abstract

The invention relates to a preparation method of a PVDC composition for a carbon molecular sieve. The method includes the steps that reaction raw materials are prepared for use; a pH buffer regulator aqueous solution and a dispersant aqueous solution are prepared; a nano-filler aqueous solution is prepared; 257.3 kg of deionized water and the pH buffer regulator aqueous solution are added into a 3M3 polymerization pot, nitrogen displacement is performed 3 times after pot sealing and pressure testing, VDC monomers and an initiator are added after vacuumizing, the dispersant aqueous solution and the nano-filler aqueous solution are added after even stirring and mixing, and the mixture is replenished with remaining deionized water; hot water is led into a polymerization pot jacket at the stirring speed of 70 rpm 30 min after cold dispersion, a polymerization reaction begins after the temperature is increased to 65 DEG C, the stirring speed is increased by 5.6 rpm / h at the same time, the polymerization reaction is ended after lasting for 8 h, residual monomers are separated out in a vacuum mode, the temperature is decreased to 45 DEG C, and discharging, centrifugation and drying are performed. The PVDC composition obtained through the method has excellent performance.

Description

technical field [0001] The invention relates to the technical field of carbon molecular sieves, in particular 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 structure through high-p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/08C08F214/06C08F220/14C08F220/44C08F2/44C08K3/36
Inventor 吴金星吴桂星
Owner HUZHOU XINAOLI ADSORPTION MATERIALS
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