Novel alcohol-removing equipment for production of polyester polyol

Abstract

The invention discloses novel alcohol-removing equipment for production of polyester polyol. The equipment comprises a reaction kettle, alcohol-removing equipment and a condensation system, wherein a butterfly valve for preventing reflux of micromolecules and byproducts is arranged between the reaction kettle and the alcohol-removing equipment; an outlet is formed in the inclined upper side of the reaction kettle; the outlet of the reaction kettle is hermetically connected with the inlet of the alcohol-removing equipment through the butterfly valve; the outlet of the alcohol-removing equipment is connected with the inlet of the condensation system; the reaction kettle is provided with a stirring mechanism; the stirring mechanism comprises a stirring machine and a stirring shaft; the stirring machine is arranged over the reaction kettle; and the stirring shaft is fixedly connected with the stirring machine and extends into the reaction kettle. The equipment further comprises a distillate tank for collecting products out of the concentration system; and the outlet of the condensation system is connected with the inlet of the distillate tank. The novel alcohol-removing equipment for the production of the polyester polyol can effectively prevent the micromolecules from returning to the reaction kettle again so as to avoid a slightly yellow color mouth and not to influence the distribution uniformity of the molecule weight, improves the quality stability of the products, saves production time, improves quality and reduces cost.

Description

technical field [0001] The invention relates to a chemical production equipment, in particular to a novel polyester polyol resin production dealcoholization equipment. Background technique [0002] Polyester polyol resin is synthesized by polyacid and polyol through polycondensation reaction. According to the difference of basic raw material types, structures and functionalities, as well as their respective proportions and synthetic process routes, it can be prepared for different purposes and performance requirements. polyester polyol resin. Generally, polyester polyols use dibasic alcohols and dibasic acids as raw materials to prepare linear polymers through polymerization. When dibasic acids are excessive, the end groups of the generated polymers are carboxyl groups (-COOH); A polymer whose end group is a hydroxyl group (-OH) is then generated. Active hydrogen-containing polymers used as synthetic polyurethane materials are mainly hydroxyl-terminated polyester polyols p...

AI Technical Summary

Problems solved by technology

[0006] Purpose: In order to overcome the deficiencies in the prior art, the present invention provides a new type of polyester polyol resin production dealcoholization equipment, which can effectively prevent the problem of small molecule reflux during production, improve the uniformity of molecular weight distribution and thus improve product quality, and solve the problem of Poor reactivity caused by uneven molecular weight distribution when used by customers in the later stage, increasing product applicability and competitive advantage

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