Synthesis method of C10 mixed ester plasticizer

A synthesis method and technology of plasticizer, which are applied in chemical instruments and methods, preparation of carboxylic acid esters, preparation of organic compounds, etc., can solve the problems of not exerting the application value of by-products, not conforming to clean production, and high processing costs, and achieve The effect of promoting steady development, obvious promotion and application value, and reducing waste discharge

Inactive Publication Date: 2015-12-23
NANJING POLYTECHNIC INSITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The by-products of all production enterprises are entrusted to solid waste treatment companies to dispose of them. The disposal cost is relatively high, which does not conform to the social consensus and economic concept of clean production, energy saving and emission reduction, and circular economy. Waste, if its by-products can be comprehensively utilized, on the one hand, it can generate certain economic benefits, and on the other hand, it can reduce environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of C10 mixed ester plasticizer synthetic method, comprises the following steps:

[0021] In the first step, the mixed anhydride and isooctyl alcohol are mixed in a certain ratio and then catalyzed. In the first step, the molar ratio of the mixed anhydride to isooctyl alcohol is 7:1. The mixed anhydride is a mixture of phthalic anhydride and partial anhydride. In the first step, the catalyst for the catalytic reaction is La-SO4 modified by rare earth La element loading. 4 2- / TiO 2- al 2 o 3 , the amount of the catalyst is 2.7% of the amount of mixed anhydride and isooctyl alcohol. In the first step, the catalytic reaction time is 2.5 hours, and the reaction temperature is controlled at 225 degrees Celsius. Wherein, the mixed anhydride and isooctyl alcohol described in the first step are by-products after the oxidation of durene.

[0022] In the second step, after the catalytic reaction is completed, the catalyst is filtered out from the reaction product; ...

Embodiment 2

[0026] A kind of C10 mixed ester plasticizer synthetic method, comprises the following steps:

[0027] In the first step, the mixed anhydride and isooctyl alcohol are mixed in a certain ratio and then catalyzed. In the first step, the molar ratio of the mixed anhydride to isooctyl alcohol is 5:1. The mixed anhydride is a mixture of phthalic anhydride and partial anhydride. In the first step, the catalyst for the catalytic reaction is La-SO4 modified by rare earth La element loading. 4 2- / TiO 2- al 2 o 3 , the amount of catalyst used is 3% of the amount of mixed anhydride and isooctyl alcohol. In the first step, the catalytic reaction time is 2.7 hours, and the reaction temperature is controlled at 215 degrees Celsius. Wherein, the mixed anhydride and isooctyl alcohol described in the first step are by-products after the oxidation of durene.

[0028] In the second step, after the catalytic reaction is completed, the catalyst is filtered out from the reaction product;

...

Embodiment 3

[0033] A kind of C10 mixed ester plasticizer synthetic method, comprises the following steps:

[0034] In the first step, the mixed anhydride and iso-octanol are mixed in a certain ratio and then catalyzed. In the first step, the molar ratio of the mixed anhydride to iso-octanol is 6:1. The mixed anhydride is a mixture of phthalic anhydride and partial anhydride. In the first step, the catalyst for the catalytic reaction is La-SO4 modified by rare earth La element loading. 4 2- / TiO 2- al 2 o 3 , the amount of the catalyst is 2.5% of the amount of mixed anhydride and isooctyl alcohol. In the first step, the catalytic reaction time is 3 hours, and the reaction temperature is controlled at 220 degrees Celsius. Wherein, the mixed anhydride and isooctyl alcohol described in the first step are by-products after the oxidation of durene.

[0035] In the second step, after the catalytic reaction is completed, the catalyst is filtered out from the reaction product;

[0036] The...

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Abstract

The invention discloses a synthesis method of a C10 mixed ester plasticizer, which comprises the following steps: (1) mixing mixed anhydride and isooctyl alcohol in a certain proportion, and then carrying out catalytic reaction; (2) after the catalytic reaction, filtering the catalyst out of the reaction product; (3) carrying out dealcoholization and dehydration treatment on the reaction product in which the catalyst is removed; and (4) carrying out decoloration treatment on the reaction product to obtain a finished product of the C10 mixed ester plasticizer, wherein the mixed anhydride and isooctyl alcohol used in the step (1) are byproducts obtained after oxidation of durene. In the invention, the synthesis raw material used for the synthesis method of the C10 mixed ester plasticizer is a C10 mixed anhydride byproduct, and byproducts obtained in actual production, such as phthalic anhydride and trimellitic anhydride, can be comprehensively utilized, so that the utilization ratio of C10 aromatic hydrocarbon is greatly increased, the waste discharge is reduced and the environment is protected.

Description

technical field [0001] The invention relates to the field of reuse of chemical by-products, in particular to a method for synthesizing a C10 mixed ester plasticizer. Background technique [0002] Plasticizers are generally also called plasticizers. Plasticizer is a polymer material additive widely used in industry. Adding this substance in plastic processing can make it more flexible, easy to process, and can be legally used for industrial purposes. The production of high-carbon plasticizers produced by some developed countries such as the United States and Western Europe is constantly developing, and the output continues to increase. However, the production of high-carbon plasticizer alcohols above C9 is almost blank in China. At present, there are more than 70 sets of pyromellitic acid plants in the country, which produce more than 100,000 tons of C10 mixed anhydride by-products every year. The by-products produced by the plants are mainly mixtures such as phthalic anhydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/003C07C69/80C07C69/76C08K5/12
CPCC07C67/08C07C67/12C08K5/12C07C69/003C07C69/80C07C69/76
Inventor 黄裕娥张东海仓理
Owner NANJING POLYTECHNIC INSITUTE
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