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A kind of technique utilizing glyceryl tristearate to synthesize zinc stearate

A technology of tristearic acid and zinc stearate, used in the preparation of carboxylate, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of short production cycle of zinc stearate. , high free fatty acid content, poor product color and other problems, to achieve the effect of low raw material cost, improve purity, and ensure chromaticity

Active Publication Date: 2018-10-19
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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  • A kind of technique utilizing glyceryl tristearate to synthesize zinc stearate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] S1: get glyceryl tristearate, stir while feeding, the temperature is kept at 100 ℃, add catalyst A, antioxidant and water after all glyceryl tristearate is melted, at a temperature of 135 ℃, the pressure is 0.7MPa The hydrolysis reaction was carried out under the condition of 100 °C, the hydrolyzed product was allowed to stand for 45 min, the oil and water were separated, and the catalyst was recovered by oil-phase pressure filtration to obtain stearic acid;

[0026] Among them, in terms of mass ratio, in catalyst A, zinc oxide: Al 2 O 3 -MgO is 1:6, and its dosage is 4% of the mass of glyceryl tristearate, Al 2 O 3 -MgO prepared by precipitation method, in molar ratio, Al 2 O 3 : MgO is 2.5:1;

[0027] In terms of mass ratio, among the antioxidants, antioxidant 1076: antioxidant DLTDP: antioxidant T501 is 0.12:0.38:1, and the amount thereof is 0.5% of the mass of glyceryl tristearate;

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

[0029] S2: a...

Embodiment 2

[0035]S1: take glyceryl tristearate, stir while feeding, keep the temperature at 100°C, add catalyst A, antioxidant and water after all glyceryl tristearate is melted, at a temperature of 120°C and a pressure of 0.8MPa The hydrolysis reaction was carried out under the condition of 100 °C, the hydrolyzed product was allowed to stand for 40 min, the oil and water were separated, and the catalyst was recovered by oil-phase pressure filtration to obtain stearic acid;

[0036] Among them, in terms of 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 prepared by precipitation method, in molar ratio, Al 2 O 3 : MgO is 2:1;

[0037] In terms of mass ratio, among the antioxidants, antioxidant 1076: antioxidant DLTDP: antioxidant T501 is 0.15:0.32:1, and the amount thereof is 0.3% of the mass of glyceryl tristearate;

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

[0039] S2: add the ...

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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 a kind of stearate, mainly used as a non-toxic stabilizer for polyvinyl chloride, a lubricant for cosmetics, a styrene resin, a mold release agent for bakelite products, a paint flattening agent and a rubber industry. The softener and release agent of rubber compound 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 water as the medium. After the stearic acid is heated and melted, sodium hydroxide is added to carry out the saponific...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C53/126C07C51/41C07C31/22C07C29/09B01J23/06
CPCY02P20/584
Inventor 严一丰严睛
Owner HUIZHOU AIMSEA NEWWAY TECH CO LTD
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