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Method for synthesizing polyethoxylated derivative

A technology of polyethoxylation and synthesis method, which is applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of reduced reaction conversion rate, application limitation, and increased production cost, and shortens the reaction time. , Improve product purity, strengthen the effect of stripping effect

Active Publication Date: 2013-07-03
XIAMEN JU SHENG MECHANICAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the existing preparation process of polyethoxylated derivatives, there is no step designed to reduce the occurrence of the above-mentioned by-products. Therefore, polyethylene glycol, The high content of oxirane and free oxirane reduces the reaction conversion rate, incomplete reaction of chain initiators, increases production cost, and greatly affects the activity effect of polyethoxylated derivative products , making its application limited
In addition, in the existing method, the preparation of polyethoxylated derivatives is carried out in the same reactor, and several reactions of polyethoxylated derivatives need to be carried out in sequence according to the synthesis steps, so that polyethoxylated The synthesis process of derivatives is relatively long

Method used

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  • Method for synthesizing polyethoxylated derivative
  • Method for synthesizing polyethoxylated derivative
  • Method for synthesizing polyethoxylated derivative

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of FA-3EO (fatty alcohol polyoxyethylene ether):

[0039] 1. Pre-reactor:

[0040] 1.1 The initial pressure is -0.5kg / cm 2 Add C to the prereactor of g 12 -C 14 Fatty alcohol (FA, average molecular weight=194) 7138kg and 48wt% KOH solution 20.8kg reaction;

[0041] 1.2 Vacuum the pre-reactor to reduce the pressure in the reactor to -0.952kg / cm 2 g, to remove the 12 -C 14 The fatty alcohol and KOH solution are brought into the water in the prereactor. The operating temperature of pre-reactor vacuuming is 125°C, and the operating time is 25 minutes;

[0042] 1.3 Raise the temperature of the catalytic product in the pre-reactor to 150°C and transport it to the main reactor through a pump;

[0043] The reaction formula of the reaction in the pre-reactor is as follows: RXH+KOH---->RX - K + +H 2 o

[0044] 2. The main reactor:

[0045] 2.1 After the catalytic product in the pre-reactor is added to the main reactor, it is circulated and sprayed through...

Embodiment 2

[0060] Preparation of NP-9EO (nonylphenol poly-9oxyethylene ether):

[0061] 1. Pre-reactor:

[0062] 1.1 The initial pressure is -0.4kg / cm 2 Add nonylphenol (NP, molecular weight=223) 4320kg and 48wt%KOH solution 20.8kg reaction in the prereactor of g;

[0063] 1.2 Vacuum the pre-reactor to reduce the pressure in the reactor to -0.8kg / cm 2 g, used to remove the water brought into the pre-reactor by nonylphenol and KOH solution. The operating temperature of pre-reactor vacuuming is 140°C, and the operating time is 30 minutes;

[0064] 1.3 Then raise the temperature of the catalytic product in the pre-reactor to 170°C, and pump it to the main reactor;

[0065] The reaction formula of the reaction that takes place in the prereactor is as follows:

[0066] RXH+KOH----------------->RX - K + +H 2 o

[0067] 2. The main reactor:

[0068] 2.1 After the material in the pre-reactor is added to the main reactor, it is sprayed circularly through the spray nozzle set in the main...

Embodiment 3

[0083] Preparation of PEG1000 (polyethylene glycol, average molecular weight=1000):

[0084] The production of PEG1000 is divided into two steps:

[0085] In the first step, PEG400 is produced by DEG:

[0086] 1. Pre-reactor:

[0087] 1.1 The initial pressure is -0.6kg / cm 2 Add diethylene glycol (DEG, molecular weight=106) 2544kg and 48wt% KOH solution 20.8kg reaction in the prereactor of g;

[0088] 1.2 Vacuum the pre-reactor to reduce the pressure in the reactor to -1kg / cm 2 g, used to remove the water brought into the pre-reactor by diethylene glycol and KOH solution. The operating temperature of pre-reactor vacuuming is 120°C, and the operating time is 25 minutes;

[0089] 1.3 Raise the temperature of the catalytic product in the pre-reactor to 150°C and transport it to the main reactor through a pump;

[0090]The reaction formula of the reaction that takes place in the prereactor is as follows:

[0091] R(XH) 2 +2KOH ------------>RX 2- (K + ) 2 +2H 2 o

[009...

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Abstract

The invention discloses a method for synthesizing a polyethoxylated derivative. In the method for synthesizing the polyethoxylated derivative, a process for producing the polyethoxylated derivative serving as a nonionic surfactant is performed in three reactors according to chemical reaction steps respectively; therefore, the three reactors can selectively perform a synthetic reaction of the polyethoxylated derivative synchronously or asynchronously, so that the time required by a synthetic process is greatly shortened and the yield of a device is increased.

Description

technical field [0001] The invention relates to a method for synthesizing nonionic surfactants, in particular to a method for synthesizing ether compounds, and more specifically to a method for synthesizing polyethoxylated derivatives. Background technique [0002] Polyethoxylated derivatives are non-ionic surfactants that do not dissociate when dissolved in water. The lipophilic groups in their molecules are basically the same as those of ionic surfactants, and they also contain a certain amount of oxygen-containing hydrophilic Group, because non-ionic surfactants do not exist in an ionic state, they have high stability, are not easily affected by the presence of strong electrolytes, and are not easily affected by acids and bases. They have good compatibility with other surfactants and can be used on solid surfaces. There is no strong adsorption on the surface, and it has many functions such as good washing, dispersing, foaming, wetting, solubilizing, antistatic, anti-corro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C41/26C07C41/03C07C43/11C07C43/23C08G65/28
Inventor 蔡一铭李坤黄燕珍
Owner XIAMEN JU SHENG MECHANICAL ENG
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