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Technique for synthesizing zinc stearate from glyceryl tristearate

A technology of tristearic acid and zinc stearate, which is applied in the chemical industry, can solve the problems of short production cycle of zinc stearate, high content of free fatty acid, and poor color of the product, and achieve low raw material cost, improve purity, and ensure The effect of chroma

Active Publication Date: 2016-10-12
HUIZHOU AIMSEA NEWWAY TECH CO LTD
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  • Summary
  • 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.

Method used

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  • Technique for synthesizing zinc stearate from glyceryl tristearate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 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;

[0026] 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;

[0027] 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;

[0028] By mass ratio, glyceryl tristearate: water is 1: 0.45;

[0029] S2: Add the stearic acid in S1 into the zinc stearate reaction kettle, keep the temperat...

Embodiment 2

[0035]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;

[0036] 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;

[0037] 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;

[0038] By mass ratio, glyceryl tristearate: water is 1: 0.5;

[0039] S2: Add the stearic acid in S1 into the zinc stearate reaction kettle, keep...

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Abstract

The invention belongs to the technical field of chemical industry, and particularly relates to a technique for synthesizing zinc stearate from glyceryl tristearate. The technique comprises the following steps: 1) hydrolyzing glyceryl tristearate and water under the actions of a catalyst and an antioxidant; and 2) adding zinc oxide and a catalyst in multiple steps, and carrying out condensation, dewatering and salification to synthesize the zinc stearate. By using the technique provided by the invention, no wastewater containing chlorine and sulfate ions is discharged in the process; the production process is safe and environment-friendly and has low total production cost; and the synthesized zinc stearate has the advantages of high yield, favorable color and low free fatty acid content, satisfies the relevant quality standard for Type I zinc stearate in HG / T3667-2012, and has higher practicality and comparability than like products in 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 process for synthesizing 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 generally adopts the double decomposition method. The specific process is to use stearic acid as the main raw material and use water as the medium. After the stearic acid is heated and melted, sodium hydroxide is added for sap...

Claims

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Application Information

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IPC IPC(8): C07C53/126C07C51/41C07C31/22C07C29/09B01J23/06
CPCY02P20/584C07C51/412B01J23/002B01J23/06B01J2523/00C07C29/095C07C51/09C07C53/126B01J2523/31B01J2523/27B01J2523/22C07C31/225
Inventor 严一丰严睛
Owner HUIZHOU AIMSEA NEWWAY TECH CO LTD
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