Catalyst for ethoxylation and use thereof

Abstract

A catalyst for the ethoxylation of feedstock without reactive hydrogen in its terminal group with epoxy ethane contains the oxide of alkali-earth metal (30-90 wt.%), the ions of group III metal (1-40wt.%), and carrier (1-30 wt.%). Its advantages are less consumption of catalyst, high reaction speed, high conversion of methylester, and high yield of product.

Description

[0001] Field: [0002] The invention belongs to a catalyst used for the synthesis reaction of ethoxylation of terminal group-free active hydrogen raw materials and its application. Background technique: [0003] Generally speaking, the nonionic surfactants derived from ethylene oxide have an active or unstable hydrogen atom in their hydrophobic raw materials, and this hydrogen atom is connected to a heteroatom such as O or N. Catalysts such as NaOH, KOH or NaOCH 3 Under the action of etc., the active hydrogen is easily removed to form an active anion with the base, which then quickly reacts with ethylene oxide (EO) to form an ethoxylate. However, for raw materials without active end groups such as fatty acid methyl ester, under the action of the above-mentioned basic catalyst, the conversion rate of methyl ester is very low, generally <50%, and the product oxyethylene group has a wide distribution. [0004] In 1990, Vista Chemical Company (now CONDEA Vista Company) develo...

AI Technical Summary

Problems solved by technology

[0008] Although the catalysts of these two companies can effectively complete the ethoxylation reaction of raw materials without active hydrogen in the terminal group, the amount of catalyst used is relatively large and must be filtered out from the product. The reaction speed is relatively slow, and the average addition rate is about 1gEO / g cat min