Atmospheric pressure production process for beta-(3.5-diteritiary butyl-4-hydroxy phenyl)propionic acid octadecanol ester

Abstract

The invention relates to an atmospheric pressure production process for beta-(3.5-diteritiary butyl-4-hydroxy phenyl)propionic acid octadecanol ester. The production process comprises the following steps of: putting beta-(3.5-diteritiary butyl-4-hydroxy phenyl)methyl propionate, octadecanol and a catalyst into a reactor according to a certain proportion, heating and melting the materials under the condition of continuously introducing N2, stirring to uniformly mix the materials, reacting for 6 to 12 hours at the temperature of 160 to 200 DEG C, dissolving, decoloring, performing heat filtration, crystallizing and drying to obtain the finished products. The production process has the advantages that: 1, a methanol reactant is effectively recycled to reduce environmental pollution; 2, the vacuum pump is eliminated to reduce investment on equipment; and 3, the recycled methanol can be used a solvent during production to reduce production cost.

Description

technical field [0001] The invention relates to the improvement of the production process of β-(3.5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, and realizes the production process of β-(3.5-di-tert-butyl-4-hydroxyphenyl) by changing the technological conditions. Base) octadecyl propionate is produced under normal pressure. Background technique [0002] β-(3.5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, its trade name is antioxidant 1076, the traditional production process is the decompression method production process: the β-(3.5-di Methyl tert-butyl-4-hydroxyphenyl) propionate, stearyl alcohol and catalyst are put into a reactor in a certain proportion, heated under reduced pressure, and reacted at a temperature of 100-150° C. for 6-12 hours, and the synthesis reaction is completed. [0003] Its shortcoming is: 1, in order to make reaction move to positive reaction direction, reaction needs to remove reaction product-methanol under high vacuum condition, ...

AI Technical Summary

Problems solved by technology

[0003] Its disadvantages are: 1. In order to make the reaction move to the positive reaction direction, the reaction needs to remove the reaction product-methanol under high vacuum conditions to improve the product yield

However, under this condition, methanol recovery is difficult, and the discharge treatment causes environmental pollution.

Although a dry vacuum pump can solve this problem, the dry vacuum pump is expensive and the investment increases

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