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Processing method for organic volatile compositions in VAE emulsion

A treatment method and volatile matter technology are applied in the field of treatment of organic volatile matter in VAE emulsion, which can solve problems such as low treatment efficiency, and achieve the effects of improving removal rate, simple and easy production, and cost saving.

Active Publication Date: 2015-03-18
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Various methods such as steam stripping, post-polymerization, and stripping-post-polymerization have been reported abroad. These methods are carried out at room temperature or low temperature vacuum, and the removal rate of residual monomers and benzene increases with the prolongation of treatment time. low processing efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A treatment method for organic volatiles in VAE emulsion is to add 1000 grams of VAE emulsion to a 2L glass reaction bottle, add ethanol accounting for 2wt% of the total amount, and add deionized water accounting for 10wt% of the total amount, and stir evenly Afterwards, be warming up to 85 DEG C, start distillation, add the potassium persulfate that accounts for total amount 0.02wt% while distillation, after distillation 6 hours, container is purged with nitrogen, condensate is collected; Cool down and discharge after the 8th hour.

[0014] project

VAE emulsion sample (before treatment)

VAE emulsion sample (after treatment)

Residual vinyl acetate (wt%)

2

0.020

Benzene content (ppm)

2

0.030

[0015] Above-mentioned initiator can also be that those skilled in the art can think of the oxidation-reduction initiator that can be applied in this treatment method, be hydrogen peroxide, tert-butyl hydroperoxide or tert-buty...

Embodiment 2

[0018] A treatment method for organic volatiles in VAE emulsion, adding 1000 grams of VAE emulsion to a 2L glass reaction bottle, adding vinyl acetate accounting for 3wt% of the total amount, and supplementing deionized water accounting for 13wt% of the total amount, and stirring evenly Afterwards, be warming up to 90 ℃, begin distillation, add the ammonium persulfate that accounts for total amount 0.03wt% while distillation, after distillation 5.5 hours, container is purged with nitrogen, condensate is collected; Cool down and discharge after the 10th hour.

[0019] project

[0020] The obtained VAE emulsion has good stability, and its particle size, molecular weight distribution, solid content and other properties are not affected compared with those before treatment.

Embodiment 3

[0022] A kind of processing method of organic volatile matter in VAE emulsion, in the glass reaction bottle of 2L, add the VAE emulsion of 1000 grams, add the methyl acetate that accounts for 2.5wt% of total amount simultaneously, and supplement the deionized water that accounts for 12wt% of total amount, After stirring evenly, heat up to 95°C, start distillation, add 0.025wt% sodium persulfate accounting for the total amount while distilling, purge the container with nitrogen after 5 hours of distillation, and collect the condensate; Count, cool down and discharge after the 9th hour.

[0023] project

[0024] The obtained VAE emulsion has good stability, and its particle size, molecular weight distribution, solid content and other properties are not affected compared with those before treatment.

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Abstract

A processing method for organic volatile compositions in a VAE emulsion comprises preparing raw materials, concretely preparing 2 wt%-3 wt% of an organic solvent, 10 wt%-13 wt% of water, 0.02 wt%-0.03 wt% of an initiator and the balance VAE emulsion; uniformly mixing the organic solvent, water and the VAE emulsion according to the percentage, heating to 85-95 DEG C for starting distillation, adding the initiator according to the percentage when distillation is performed, after distillation is performed for 4-6 h, using nitrogen to blow the container, collecting the condensed liquid, and after collection is finished, cooling and discharging. The processing method employs a high-temperature distillation means, and by adding the organic solvent, adding the initiator for cooperation when distillation is performed, and using nitrogen to blow the container after distillation is performed, the processing method helps to improve the removal rate of a residual monomer and the removal rate of benzene and other impurities, has the residual-monomer removal rate up to 99%, also has no influence on emulsion stability, particle size and molecular weight distribution, solid content and the like, and also helps to substantially shorten the processing time of the residual monomer, and benzene and other impurities, and only 8-10 hours are needed for finishing processing.

Description

technical field [0001] The invention relates to a treatment method for organic volatile components in polymerized emulsion, in particular to a treatment method for organic volatile components in VAE emulsion. Background technique [0002] VAE emulsion (vinyl acetate-ethylene copolymer emulsion) has been widely used in adhesives, coatings, paper processing, fabric processing, packaging, construction and many other fields because of its excellent performance. Due to the emulsion polymerization method used in the production of VAE emulsion, the monomer conversion rate cannot reach 100% during polymerization, and some unreacted monomers remain in the emulsion, resulting in odor of the product, which is not environmentally friendly. As the VAE application industry has increasingly strict requirements on residual VAc monomers, benzene and other harmful organic substances in recent years, the products need to be treated to control the volatile harmful substances below the lower req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F6/16C08F6/14C08F210/02
Inventor 曹勇邱萱罗丽华肖长发宁威
Owner CHINA PETROCHEMICAL CORP
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