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Process control method of methylallyl alcohol polyoxyethylene ether

A technology of methallyl alcohol polyoxyethylene ether and methallyl alcohol, which is applied in the field of polymer synthesis, can solve the problems of difficult stable control of process indicators, many by-products, complex synthesis process, etc., to ensure quality and Stability, fully automatic control, precise and rapid response

Active Publication Date: 2022-05-13
连云港石化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still technical bottlenecks such as complex synthesis process, many by-products, difficulty in stabilizing process indicators, and low degree of self-control.

Method used

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  • Process control method of methylallyl alcohol polyoxyethylene ether
  • Process control method of methylallyl alcohol polyoxyethylene ether
  • Process control method of methylallyl alcohol polyoxyethylene ether

Examples

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Embodiment 1

[0021] A process control method of methallyl alcohol polyoxyethylene ether, comprising the steps of:

[0022] 1) Add 70 parts by weight of methallyl alcohol to the reaction kettle, add 1 part by weight of liquid catalyst sodium metal within 30 minutes, control the reaction temperature to 60°C, and the reaction time is 15 minutes; after the reaction is completed, replace it with nitrogen and open the hot water valve Warm up to 75°C, then drop 400 parts by weight of ethylene oxide, and the feed rate of ethylene oxide is 140 parts by weight / hour. At this time, the temperature will drop slightly, and the pressure will rise slowly with a slight positive pressure. Gradually rise, when the temperature reaches 105°C, the hot water valve will open automatically, limiting the lower limit of the heat exchanger valve opening to 30%, and the upper limit to 80%; the material circulation temperature is set to 120°C, the set value According to the temperature change of the reactor, the flow r...

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Abstract

A process control method of methylallyl alcohol polyoxyethylene ether belongs to the technical field of polymer synthesis, and comprises the following steps: 1) adding methylallyl alcohol as an initiator and a catalyst into a reaction kettle for reaction, then dropwise adding ethylene oxide, controlling the temperature of the reaction kettle to be stabilized at 135 DEG C, cooling the reaction kettle to a certain temperature after the reaction is finished, and then adding a catalyst for reaction; discharging to obtain a methylallyl alcohol polyoxyethylene ether oligomer; and (2) adding ethylene oxide into the methallyl alcohol oligomer obtained in the step (1) again to carry out anionic polymerization reaction, and after the reaction is finished, cooling and discharging to obtain the methallyl alcohol polyoxyethylene ether, thereby solving the technical problem of unstable molecular weight distribution of the methallyl alcohol polyoxyethylene ether caused by stable process condition control in the production process of the existing process. The method is mainly applied to the production technology of the methylallyl alcohol polyoxyethylene ether.

Description

technical field [0001] The invention relates to the technical field of polymer synthesis, in particular to a process control method of methallyl alcohol polyoxyethylene ether. Background technique [0002] With the rapid development of the national economy, the amount of domestic construction is also increasing. The construction of various civil, railway, highway, bridge, tunnel, hydropower, seaport, wharf, airport and other major and key projects cannot do without high performance concrete. , Self-compacting concrete, high-strength concrete, and high-fluidity concrete, the amount of concrete required is increasing, and the quality requirements are increasing. The production of various performance concrete is inseparable from high-performance water reducing agents. [0003] Polycarboxylate high-performance water reducer is the third generation of high-performance water reducer developed after the common water reducer represented by wood calcium and the high-efficiency water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28
CPCC08G65/2609C08G65/2648C08G65/2696
Inventor 杨卫东陈艳丹朱晓东钟向宏练建华胡晓宇杜威杨璐
Owner 连云港石化有限公司
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