Preparation method of plant oil polyalcohol

Abstract

The invention relates to a manufacturing method of the vegetable oil polyalcohol which can be used to make various polyurethane rigid foam materials. It uses vegetable oil and low-substituted fatty amine and / or polyalcohol to act with alkali. The hydroxyl value of the formed polyalcohol is 200-700 mgKOH / g. It has the advantage of simple technology and convenient post processing. And it is fit for industrialized large scale production.

Description

technical field

[0001] The invention relates to a preparation method of vegetable oil polyol, which can be used to prepare various polyurethane rigid foam materials. Background technique

[0002] Due to the limitation of petroleum resources, people began to use vegetable oil as raw material to replace the original petroleum raw material to prepare polyols. US6107433 discloses a method for preparing polyols from vegetable oils, which uses a fluoroboric acid catalyst to epoxidize vegetable oils, and then uses another fluoroboric acid catalyst plus alcohol to hydroxylate the epoxidized oil into polyols. The disadvantages of this preparation method are that the original price is high, the reaction risk is high, and the by-product treatment is troublesome. CN1583828A discloses a method for preparing oleochemical oil-based polyols by mixing epoxidized oleochemical oils, alcohols, and acid-activated or acid-leached clays to prepare oleochemical oil-based polyols Polyol. Treatmen...