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Device and process for synthesizing series products of polyester polyol

A technology of polyester polyol and series products, applied in the field of polyester polyol, can solve problems such as low applicability of process technology raw materials, poor adjustability of product performance indicators, no targeted measures for production, etc., and achieve flexible product performance indicators Controllable, simple method, and the effect of improving the control range

Inactive Publication Date: 2019-08-30
CHINA CONSTR IND & ENERGY ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, polyester polyols are mostly produced in batch stirred tank reactors, and the production capacity of a single tank has reached the scale of 10,000 tons. However, once the production process route of the currently running or proposed project is determined, the performance indicators of the produced products can be adjusted. Poor and poor product quality, it is difficult to meet the needs of different indicators of downstream users
At present, the applicability of raw materials for process technology is not high, and there are no targeted measures for the production of raw materials for different organic polycarboxylic acids or anhydrides and polyols, resulting in

Method used

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  • Device and process for synthesizing series products of polyester polyol

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: as figure 1 As shown, a device for synthesizing polyester polyol series products, including: static mixer M1, feed heater E1, reactor R1, reactor circulating pump P2, reactor powder feed hopper V1, blending tank R2 , blending powder feed hopper V4, distillation tower T1, all gas phase condenser E4, defoaming separator V2, vacuum pump P1, gas-liquid separation tank V3, polyester polyol primary cooler E2 and polyester polyol two stage cooler E3;

[0030] The top of the reactor R1 is equipped with a powder feeding port, a reactor gas phase outlet, a reactor inert gas inlet and a reactor liquid phase material outlet at the bottom, and the reactor R1 powder feeding port is provided with a reactor powder feed hopper V1, the gas phase outlet of the reaction kettle is connected to the side feed port of the distillation tower T1, and the side is equipped with a feed port of the reaction kettle and a return material inlet of the distillation tower, and the return m...

Embodiment 2

[0044] Embodiment 2: In the present embodiment, adopt the device identical with embodiment 1 to carry out polyester polyol series product synthesis, its processing step is:

[0045]2.1. First, purge the whole system with nitrogen. After the purge is completed, start to add diethylene glycol, the addition amount is 410kg. Turn on the reactor circulation pump P2, and the diethylene glycol is heated to 150°C by the feed heater E1. At this time Start to add phthalic anhydride (PA) preheated to 140°C, the addition amount is 250kg, add 25g of terephthalic acid (PIA) powder through the reactor powder feed hopper V1, turn on the reactor stirring device, The material heater E1 and the reactor R1 self-heating system maintain the temperature of the material in the reactor R1 at 220°C for 8 hours. At this time, the pressure of the reactor R1 is a slight positive pressure. Keep it at 30kPa, add 340g of catalyst - n-butyl titanate (TBT) at this time, continue to react for 6 hours, and then ...

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Abstract

The invention discloses a device and process for synthesizing series products of polyester polyol. The device comprises a static mixer, a feeding heater, a reaction kettle, a reaction kettle circulation pump, a powder material feeding hopper, a blending kettle, a distillation column, a gas-phase total condenser, a defoaming separator, a vacuum pump, a gas-liquid separation tank, a primary polyester polyol cooler and a secondary polyester polyol cooler, wherein oth organic polybasic carboxylic acid or anhydride and polyhydric alcohols are preheated to a certain temperature, are fed into the static mixer for mixing, are heated by the feeding heater, and are further fed into the reaction kettle; after a certain time of reactions, a liquid-phase product is fed into the blending kettle after two-stage cooling; different types of additives are added to form a series of polyester polyol products of multiple models; and byproducts in a gas phase are subjected to defoaming separation twice, andunreacted polyol is recycled and fed into an incineration system. The method disclosed by the invention has the advantages of being good in adaptability, wide in raw material source, flexible and adjustable in product specification, wide in property index range, high in polyolrecycling efficiency, and the like.

Description

technical field [0001] The invention relates to the technical field of polyester polyols, in particular to a device and process for synthesizing polyester polyol series products. Background technique [0002] Polyester polyols are usually a type of hydroxyl-terminated polyester formed by esterification and polycondensation of polyols and organic dicarboxylic acids (anhydrides) or polymerization of polyols and lactones, with an average molecular weight of 1000-4000 and carboxyl groups The concentration shall not exceed 0.02mol•kg. Polyester polyols are mainly used as raw materials for polyurethane synthesis. Compared with polyether polyols, they have better wear resistance, oil resistance and temperature resistance, and higher mechanical strength. According to the use of different dicarboxylic acids, it can usually be divided into aliphatic polyester polyols, aromatic polyester polyols and mixed acid polyester polyols. Due to the introduction of benzene ring structure into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/78
CPCC08G63/78C08G63/785
Inventor 田强岳昌海孙玉玉朱忆宁
Owner CHINA CONSTR IND & ENERGY ENG GRP CO LTD