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[Chemical Knowledge]：Production process and preparation method of trioctyl trimellitic acid TOTM

Read： 490 Time：20months ago Source：Transform the World with Simplicity

Trioctyl trimellitic acid (TOTM) is a new type of environment-friendly and efficient plasticizer, which is widely used in plastics, coatings, rubber and other fields because of its environmental friendliness and good biodegradability. This article will introduce the production process and preparation method of TOTM.

1. TOTM production process

TOTM production process is generally divided into two parts, namely esterification reaction and dehydration reaction. Wherein, the esterification reaction is carried out by introducing octanoic acid and mellitic triol into a reaction kettle, the reaction temperature is about 180-200 ℃, and the reaction time is about 3-4 hours. The dehydration reaction was carried out by adding the freshly formed trimellitic octanoate to a dehydrating agent at a reaction temperature of about 180 ° C. and for a reaction time of about 2 hours.

2. Preparation of TOTM Method

1. Esterification

Esterification is one of the preparation methods of TOTM. The specific steps are as follows:

(1) Put octanoic anhydride and mellitic triol into a reaction kettle.

(2) Stir the liquid in the reactor while heating to 180-200°C and react for 3-4 hours.

(3) After the reaction is completed, the reaction product is first distilled to remove non-reactive substances, and finally trimellitic octoate is obtained.

2, dehydration method

dehydration reaction is the preparation method of TOTM two. The specific steps are as follows:

(1) The trimellitic octylate just obtained by the esterification reaction is added to a dehydrating agent.

(2) The liquid in the reaction vessel was stirred while heating to 180 ° C. and reacted for 2 hours.

(3) After the reaction is completed, the reaction product is distilled to remove non-reactive substances, and finally trioctyl trimellitate is obtained.

3. summary

TOTM is a highly efficient plasticizer that is very suitable for the development trend of environmental protection. Its production process is relatively simple, and there are two preparation methods, namely esterification reaction and dehydration reaction. However, in the preparation process should pay attention to master the reaction conditions, to ensure the quality of the products produced. Finally, it is hoped that TOTM can continue to play its advantages in the fields of plastics and coatings, and make greater contributions to the cause of environmental protection.