A kind of preparation method utilizing glyceryl tristearate to prepare zinc stearate

A technology of tristearic acid and zinc stearate, applied in the chemical industry, can solve the problems of high free acid content, high price and high production cost, and achieve the effects of low free acid content, low raw material cost and low production cost

Active Publication Date: 2018-06-01
HUIZHOU AIMSEA NEWWAY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production cycle of zinc stearate prepared by melting method is short, there is no waste liquid discharge, the product does not contain other inorganic salt anions, and less water is used, but the prepared product has problems such as low purity, high free fatty acid content, and poor color of the product.
[0004] The zinc stearate produced by most domestic zinc stearate manufacturers has high production costs to varying degrees, serious environmental pollution in the production process or the prepared zinc stearate is in accordance with the chemical industry standard of the People's Republic of China "HG / T3667-2012 "Zinc stearate" detection indicators are not up to standard, especially the high content of free acid, its preparation process and quality still need to be further improved, thus limiting its application in domestic and foreign markets, most of high-quality zinc stearate relies on Imported, expensive

Method used

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  • A kind of preparation method utilizing glyceryl tristearate to prepare zinc stearate

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Effect test

Embodiment 1

[0027] The preparation of embodiment 1 zinc stearate

[0028] S1: Take tristearin, stir while feeding, keep the temperature at 100°C, add catalyst A, antioxidant and water after the tristearin is completely melted, at a temperature of 135°C and a pressure of 0.7MPa Carry out hydrolysis reaction under the condition of condition, hydrolyzate stands still 45min, oil and water are separated, and oil phase pressure filtration reclaims catalyst and promptly obtains stearic acid;

[0029] Wherein, by mass ratio, in catalyst A, zinc oxide: Al 2 o 3 -MgO is 1:6, its dosage is 4% of the mass of glyceryl tristearate, Al 2 o 3 -MgO is prepared by precipitation method, in molar ratio, Al 2 o 3 :MgO is 2.5:1;

[0030] In terms of mass ratio, in antioxidants, antioxidant 1076: antioxidant DLTDP: antioxidant T501 is 0.12: 0.38: 1, and its consumption is 0.5% of tristearin quality;

[0031] By mass ratio, glyceryl tristearate: water is 1: 0.45;

[0032] S2: Add the stearic acid in S1 i...

Embodiment 2

[0037] The preparation of embodiment 2 zinc stearate

[0038] S1: Take tristearin, stir while feeding, keep the temperature at 100°C, add catalyst A, antioxidant and water after the tristearin is completely melted, at a temperature of 120°C and a pressure of 0.8MPa Carry out hydrolysis reaction under the condition of certain conditions, hydrolyzate is left standstill 40min, oil and water are separated, and oil phase pressure filtration reclaims catalyst and promptly obtains stearic acid;

[0039] Wherein, by mass ratio, in catalyst A, zinc oxide: Al 2 o 3 -MgO is 1:4, its dosage is 5.5% of the mass of glyceryl tristearate, Al 2 o 3 -MgO is prepared by precipitation method, in molar ratio, Al 2 o 3 :MgO is 2:1;

[0040] In terms of mass ratio, in antioxidants, antioxidant 1076: antioxidant DLTDP: antioxidant T501 is 0.15: 0.32: 1, and its consumption is 0.3% of tristearin quality;

[0041] By mass ratio, glyceryl tristearate: water is 1: 0.5;

[0042] S2: Add the steari...

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Abstract

The invention belongs to the technical field of chemical engineering, and particularly relates to high-quality zinc stearate prepared from glyceryl tristearate. A preparation technology of zinc stearate comprises the following steps that 1, glyceryl tristearate and water are hydrolyzed under the action of a catalyst and an antioxidant; 2, zinc oxide and a catalyst are added stepwise, condensing, dewatering and salt forming are conducted, and zinc stearate is synthesized. Zinc stearate is high in preparation yield, good in color and cluster, low in free acid content and stable in quality, and the related quality indexes meet the related requirements on I type zinc stearate in HG / T3667-2012; in addition, no wastewater containing chlorine and sulfate ions is discharged in the preparation process of zinc stearate, the production process is safe and environmentally friendly, and the total production cost is low. Zinc stearate is high in quality and has the better practicability and comparability compared with similar products on the market in practical application.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for preparing zinc stearate by using glyceryl tristearate. Background technique [0002] Zinc stearate is one of the stearates. It is mainly used as a non-toxic stabilizer for polyvinyl chloride, a lubricant for cosmetics, a styrene resin, a release agent for bakelite products, a flatting agent for paint, and as a chemical agent in the rubber industry. Rubber softener and release agent are widely used. With the development of industries such as plastics, coatings and petrochemicals, the demand for zinc stearate in the domestic market is increasing year by year. [0003] At present, the domestic production of zinc stearate is generally synthesized by double decomposition method. The specific process is to use stearic acid as the main raw material and water as the medium. After the stearic acid is heated and melted, sodium hydroxide is added for sapo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/41C07C53/126B01J23/06
CPCB01J23/002B01J23/06B01J2523/00C07C51/09C07C51/412C07C53/126B01J2523/22B01J2523/27B01J2523/31
Inventor 严一丰严睛
Owner HUIZHOU AIMSEA NEWWAY TECH CO LTD
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