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Synthesis method of pentaerythritol polyoxyethylene ether stearate

A technology of pentaerythritol polyoxyethylene ether and stearate, which is applied in the field of polymer compound preparation, can solve the problems of low synthesis conversion rate and difficulty in meeting the production needs of enterprises, and achieve the effect of improving synthesis conversion rate and good catalytic activity

Pending Publication Date: 2020-08-28
JIAHUA CHEM MAOMING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the synthesis conversion rate of pentaerythritol polyoxyethylene ether stearate is not high, and it is difficult to meet the production needs of enterprises

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Step 1: heating and melting: 227g stearic acid, 999g pentaerythritol polyoxyethylene ether and 12g fixed super acid catalyst are dropped into reactor, wherein, the molecular weight of pentaerythritol polyoxyethylene ether is 5000; The add-on of pentaerythritol polyoxyethylene ether= (the molecular weight of the addition of stearic acid * pentaerythritol polyoxyethylene ether) / (284 * 4)=(227 * 5000) / (284 * 4)=999.11≈999g; The addition of solid superacid catalyst=(stearic acid Addition amount of acid+addition amount of pentaerythritol polyoxyethylene ether)×1%=(227+999)×1%=12.26≈12g. The reactor was heated to 100°C, the stirring rate of the reactor was 80r / min, and the reactor was evacuated to a negative pressure above -0.95MPa until all the materials in the reactor were melted; the solid superacid catalyst in this example was from Jiangyin Nanda Purchased by Synthetic Chemical Effective Company, the immobilized superacid catalyst was reused for the 6th time.

[0023] St...

Embodiment 2

[0027] Step 1: heating and melting: 227g stearic acid, 1798g pentaerythritol polyoxyethylene ether and 41g fixed super acid catalyst are dropped into reactor, wherein, the molecular weight of pentaerythritol polyoxyethylene ether is 9000; The add-on of pentaerythritol polyoxyethylene ether= (the molecular weight of the addition of stearic acid × pentaerythritol polyoxyethylene ether) / (284 × 4)=(227 × 9000) / (284 × 4)=1798.41≈1798g; The addition of solid superacid catalyst=(stearic acid Addition amount of acid+addition amount of pentaerythritol polyoxyethylene ether)×2%=(227+1798)×2%=40.5≈41g. The reactor was heated to 120°C, the stirring rate of the reactor was 200r / min, and the reactor was evacuated to a negative pressure above -0.95MPa until all the materials in the reactor were melted; the solid superacid catalyst in this example was from Jiangyin Nanda Purchased by Synthetic Chemical Effective Company, the fixed superacid catalyst was reused for the 5th time.

[0028] Step...

Embodiment 3

[0032] Step 1: heating and melting: 220g stearic acid, 1307g pentaerythritol polyoxyethylene ether and 23g fixed superacid catalyst are dropped into reactor, wherein, the molecular weight of pentaerythritol polyoxyethylene ether is 6750; The add-on of pentaerythritol polyoxyethylene ether= (the molecular weight of the addition of stearic acid × pentaerythritol polyoxyethylene ether) / (284 × 4)=(220 × 6750) / (284 × 4)=1307.21≈1307g; The addition of solid superacid catalyst=(stearic acid Addition amount of acid+addition amount of pentaerythritol polyoxyethylene ether)×1.5%=(220+1307)×1.5%≈22.9=23g. The reactor was heated to 110°C, the stirring rate of the reactor was 150r / min, and the reactor was evacuated to a negative pressure above -0.95MPa until all the materials in the reactor were melted; the solid superacid catalyst in this example was from Jiangyin Nanda Purchased by Synthetic Chemical Effective Company, the immobilized superacid catalyst was reused for the 8th time.

[0...

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Abstract

The invention discloses a synthesis method of pentaerythritol polyoxyethylene ether stearate. The synthesis method comprises the following steps: 1, heating melting: adding stearic acid, pentaerythritol polyoxyethylene ether and a fixed superacid catalyst to a reaction kettle, and heating melting, the molecular weight of pentaerythritol polyoxyethylene ether being 5000-9000; stirring until the materials in the reaction kettle are completely molten; 2, esterification reaction: continuously carrying out esterification reaction on the material obtained in the step 1 in the reaction kettle until the acid value of the material is less than or equal to 15mg. KOH / g through sampling test; and 3, cooling and filtering: taking out the material obtained in step 2 from the reaction kettle, cooling, and filtering to obtain pentaerythritol polyoxyethylene ether stearate. According to the method, the synthesis conversion rate of pentaerythritol polyoxyethylene ether stearate is effectively increased,and the production requirements of enterprises are met.

Description

technical field [0001] The invention relates to the field of polymer compound preparation, in particular to a synthesis method of pentaerythritol polyoxyethylene ether stearate. Background technique [0002] Thickeners are a new class of functional polymer materials that have developed rapidly in recent years, and are mainly used to increase the viscosity or consistency of products. It has the characteristics of small dosage, obvious thickening and convenient use, so it is widely used in cosmetics, food additives, pharmaceuticals, oil extraction, papermaking, printing and dyeing, leather processing and other industries. [0003] At present, there are more than 200 kinds of thickeners used in the daily chemical industry, mainly including inorganic salts, surfactants, water-soluble polymers and fatty alcohols and fatty acids. The product is transparent, stable, rich in foam, delicate in hand and easy to rinse. It is also often used in cosmetics, toothpaste, etc. Thickeners a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/332C08G65/28
CPCC08G65/3322C08G65/2609C08G2650/04C08G2650/10
Inventor 黎明杰陈伟钧彭延平李玉博
Owner JIAHUA CHEM MAOMING
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