Production method of trioctyl trimellate

Abstract

The invention discloses a production method of trioctyl trimellate. In order to control the quality of a raw material trimellitic anhydride, nitrogen protection is used during a production process; a small quantity of titanate catalysts is added to completely carry out esterification reaction on the conditions that two-stage esterification reaction and the byproduct water generated by the reaction is removed, thus the synthesised product does not need to be neutralized or only needs to be neutralized with a small quantity of a neutralizer, which means that the product possibly reaches the standards of high-quality products in terms of indexes such as chroma and acid value without being absorbed and decolored by activated carbon, thus avoiding the influence on chroma due to the existence of active carbon micro-particles and the problems occurring in downstream applications of the product due to the addition of lots of the neutralizer and the residue of lots of salts in the product; and the given aftertreatment method can be carried out to solve the problem when the acid value of the product is slightly high due to the low raw material purity of trimellitic anhydride, or acid regurgitation and the like occurring in a process of adding water to destroy the titanate catalysts.

Description

Technical field [0001] The present invention involves a production method of a plasticizer, especially the production method of a phenyl acid tritenuette plasticizer, which is the field of organic chemical raw material manufacturing. Background technique [0002] Trimetal ester is the same as other common plasticizers, because it is liquid at room temperature, which is convenient to transport and use. In addition, the boiling point of this type of ester is high, the volatile is low, and the molecular amount is moderate.The branches are very good for improving the plasticity and softness of plastic and rubber, so they are often used as plasticizers. [0003] As the EU officially implemented the ROHS 2.0 (2011 / 65 / EU) regulations since January 2013, the dihp (DeHP), bonetate (BBP) and bonitamate of the deotonate (DEHP), bonhaxolic acid (BBP)The larger plasticizer (DBP) and other dosage are listed as a preferred harmful substance, and will be listed as a list of substances before Jul...

AI Technical Summary

Problems solved by technology

TiO 2 It is doubtful whether it can play a catalytic role in the esterification reaction of trimellitic anhydride and octanol, and this method does not mention the use of nitrogen protection during the reaction process, strict control of the chromaticity of trimellitic anhydride raw materials and other measures to achieve adsorption without activated carbon Decolorization can produce trioctyl trimellitate whose color meets the requirements