Continuous regeneration adsorption purification process of trimethylolpropane trioleate

Abstract

The invention discloses a continuous regeneration adsorption purification process of trimethylolpropane trioleate. The process comprises the following operation steps: (1) putting an adsorbing agent into an adsorption tower or a plurality of adsorption towers which are connected in series; (2) enabling a trimethylolpropane trioleate crude product to continuously pass through the adsorption tower filled with the adsorbing agent at certain flow velocity and temperature to ensure that impurities such as micro solid particles, gelatine and the like which can influence the oxidation resistance and emulsification resistance of the product are adsorbed by the adsorbing agent; and (3) continuously regenerating the adsorbing agent: performing circulating washing by using low carbon alcohol to remove organic impurities such as the gelatine and the like adsorbed by the adsorbing agent, then purging by using inert gas, and performing vacuum drying and regeneration to obtain a regenerated adsorbing agent which can be recycled. Trimethylolpropane trioleate prepared by virtue of the process disclosed by the invention has excellent oxidation stability and emulsification resistance, and can be better used as base oil of various lubricating oil.

Description

technical field [0001] The invention relates to a continuous regeneration adsorption purification process of trimethylolpropane oleate, which belongs to the post-treatment process of chemical production. technical background [0002] Trimethylolpropane oleate (TMPTO) is a polyol ester with the characteristics of large molecular weight, low volatility and high thermal stability. It has been widely used in lubricating oils for aircraft and automobile engines at home and abroad. [0003] The trimethylolpropane oleate obtained by the direct esterification of oleic acid and trimethylolpropane or the transesterification of methyl oleate and trimethylolpropane contains some tiny solid particles, colloids and other impurities, which affect its Antioxidant and demulsifying properties. [0004] Patents CN102887825A, CN102010332A and US7126018 disclose different catalytic esterification processes of TMPTO and methods for improving the appearance and color of products. [0005] Patent...

AI Technical Summary

Problems solved by technology

[0010] The above-mentioned documents and materials mainly focus on the research on the esterification catalyst and esterification process of synthesizing trimethylolpropane oleate, and only use heterogeneous kettle The method of formula adsorption comes purification product, and its shortcoming is:

[0012]⑵ The used adsorbent cannot be reused, the amount of solid waste residue is large, the cost of treatment increases, and the production cost of the product is also increased

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