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Synthesis method of trinonyl benzene-1,2,4-tricarboxylate plasticizer

A technology of triisononyl trimellitate and a synthesis method, which is applied in the field of synthesizing triisononyl trimellitate plasticizers, and can solve the problems of phthalate dissolution, strong volatility and migration, etc. problems, to achieve the effect of easy control of process conditions, stable quality and improved conversion efficiency

Pending Publication Date: 2018-11-27
JIANGSU ZHENGDAN CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, phthalate plasticizers are extremely volatile and mobile, and plastic products containing phthalates will cause phthalates to Dissolution, a carcinogen

Method used

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  • Synthesis method of trinonyl benzene-1,2,4-tricarboxylate plasticizer
  • Synthesis method of trinonyl benzene-1,2,4-tricarboxylate plasticizer
  • Synthesis method of trinonyl benzene-1,2,4-tricarboxylate plasticizer

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Such as figure 1 As shown, it is a device for the synthesis of triisononyl trimellitate plasticizer, including an esterification reactor 1, and the gas phase outlet at the top of the esterification reactor 1 is connected to the alcohol-water separation tower through a heat exchanger 3 4. The top, and the middle part of the alcohol-water separation tower 4 is provided with a reflux pipe—2 connected to the esterification reactor 1; the bottom of the esterification reactor 1 is connected to the dealcoholization tower 7, and the bottom of the dealcoholization tower 7 is connected to the finished product tank 13 through a filter 12; The dealcoholization tower 7 is connected with a dealcoholization reflux device, which includes a rectification tower 10, and the dealcoholization tower 7 is connected to the rectification tower 10 through a circulating pump 7 and a heat exchanger 38, and the rectification tower 10 A vacuum pump 9 is connected to it, and the reflux tank 2 11 at t...

Embodiment 2

[0031] Such as figure 2 As shown, it is another device used for the synthesis of triisononyl trimellitate plasticizer, including an esterification reactor 1, and the gas phase outlet at the top of the esterification reactor 1 is connected to the alcohol-water separation through a heat exchanger 3 The top of the tower 4 and the middle part of the alcohol-water separation tower 4 are provided with a reflux pipe-2 connected to the esterification reactor 1; the bottom of the esterification reactor 1 is connected to the dealcoholization tower 7, and the bottom of the dealcoholization tower 7 is connected to the finished product tank 13 through a filter 12 ; The dealcoholization tower 7 is connected with a dealcoholization reflux device, which includes a vacuum pump 9, a circulation pump 7, a heat exchanger three 8, and the dealcoholization tower 7 passes through the circulation pump 7, the heat exchanger three 8 Since the circulation is connected, the vacuum pump 9 is connected at...

Embodiment 3

[0039] A kind of synthetic method of triisononyl trimellitate plasticizer comprises the following steps successively:

[0040] S1, esterification reaction: the content of anhydride in the raw material trimellitic anhydride ≥ 98%; the purity of the raw material isononyl alcohol ≥ 99%; the raw material trimellitic anhydride and isononyl alcohol are put into the esterification reaction kettle 1, under the condition of nitrogen protection and uniform stirring , heated to 135-155°C, the molar ratio of trimellitic anhydride to isononanol is 1:3.6; after trimellitic anhydride is completely dissolved in isononanol, then the temperature is raised to 180°C, and a catalyst is added, the catalyst is tetrapropylene titanate Ester and tetraisopropyl titanate are compounded at a mass ratio of 1:2, and the amount of catalyst is 0.08% of the total mass of the reaction raw materials; heat preservation reaction for 1 hour, and the water generated during the esterification process is separated; co...

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Abstract

The invention provides a synthesis method of a trinonyl benzene-1,2,4-tricarboxylate plasticizer and relates to the technical field of plasticizer synthesis. The method comprises the specific steps ofan esterification reaction, negative pressure dealcoholization, alkali wash and water wash, removal of low-boiling-point substances and adsorption filtering. According to the synthesis method, an adopted catalyst is a composite inorganic acid ester, the conversion efficiency of raw materials can be improved, and a prepared trinonyl benzene-1,2,4-tricarboxylate product has the advantages of high ester content, bright luster and stable quality. The synthesis method has the advantages that the technical conditions are easy to control, the pollution is avoided, the energy consumption is low, andlarge-scale production is easily achieved. The synthesis method has good economic and environmental feasibility.

Description

technical field [0001] The invention relates to a method for synthesizing a triisononyl trimellitate plasticizer, belonging to the technical field of plasticizer synthesis. Background technique [0002] Plasticizer refers to a type of organic substance used to enhance the fluidity of plastic molding and make plastic products flexible. It has the characteristics of high boiling point, difficult to volatilize, and generally does not chemically react with plastics. Adding this substance in plastic processing can enhance its flexibility, plasticity and expansion, improve the fluidity of plastic molding and processing, and make it easy to process. There are many kinds of plasticizers, thousands of kinds have appeared in the field of research and development, and more than 100 kinds of plasticizers have been produced as commodities. In addition to the wide adaptability and plasticizing effect of general-purpose plasticizers, trimellitate plasticizers also have other special funct...

Claims

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Application Information

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IPC IPC(8): C07C67/08C07C69/76
CPCC07C67/08C07C69/76
Inventor 曹正国冯龙海周伟林
Owner JIANGSU ZHENGDAN CHEM IND CO LTD
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