Polyester polymer polyol preparation reaction device

Abstract

The invention provides a polyester polymer polyol preparation reaction device which comprises a reaction kettle A and at least two reaction kettles B. The reaction kettles B are arranged in parallel. A liquid outlet A and a liquid inlet A are formed in the top of the reaction kettle A, a valve A is mounted at the liquid inlet A, and the valve A is communicated with the atmosphere; a liquid conveying pipe A is mounted in the liquid outlet A, and the bottom end of the liquid conveying pipe A extends into the reaction kettle A and is close to the inner bottom surface of the reaction kettle A; a liquid inlet B is formed in the top of the reaction kettle B, a liquid conveying pipe B is mounted in the liquid inlet B, and the bottom end of the liquid conveying pipe B extends into the reaction kettle B and is positioned at the middle upper part of the reaction kettle B; the top end of the infusion tube A is connected with the top end of the infusion tube B through a valve B; the reaction kettle A is connected with a vacuum pump A, and the reaction kettle B is connected with a vacuum pump B; and the vacuum degree of the reaction kettle A is smaller than that of the reaction kettle B. The reaction device has the advantages of high practicability and convenience in use.

Description

technical field [0001] The invention relates to the technical field of polyol synthesis equipment, in particular to a polyester polymer polyol preparation reaction device. Background technique [0002] The synthesis reaction device is one of the essential equipment in the synthesis process of polyester polyol. In order to meet the synthesis of polyester polyol, the current synthesis reaction device mainly includes a reactor and a vacuum pump. By connecting the reactor to the vacuum pump, when the polyester After the esterification reaction and polycondensation reaction in the polyol synthesis process, the vacuum degree in the reactor is controlled to dehydrate the reaction liquid to obtain the product. [0003] The current synthesis reaction device mainly has the following problems in actual use. The first is that the equipment is poor in practicability, and the dehydration process and the esterification reaction and polycondensation reaction process cannot be carried out in...

AI Technical Summary

Problems solved by technology

[0003] The current synthesis reaction device mainly has the following problems in actual use. The first is that the equipment is poor in practicability, and the dehydration process and the esterification reaction and polycondensation reaction process cannot be carried out independently, resulting in the polyester polyol synthesis reaction can only be carried out intermittently, which seriously affects the synthesis. Efficiency, unable to meet the growing demand for polyester polyols; second, when the esterification reaction and polycondensation reaction are carried out in the reaction device first, and then the pressure-controlled dehydration treatment is carried out, the pressure inside and on the surface of the solution is difficult to balance, resulting in the dehydration process. It is prone to the problems of slow water removal and low removal efficiency, which affects the smooth progress of the synthesis process and thus affects the synthesis efficiency

Images