Calcium stearate and preparation process thereof

A calcium stearate and preparation technology, which is applied in the chemical industry, can solve the problems of substandard detection indicators, serious environmental pollution, high free acid content, etc., and achieve the effects of low production cost, good color and low free acid content

Active Publication Date: 2016-09-21
HUIZHOU AIMSEA NEWWAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method prepares the calcium stearate process simple, and filter cake water content is low, is easy to dry, and finished product bulk density is little, but its product yield is low, and total production cost is high
[0004] The calcium stearate produced by most domestic calcium stearate manufacturers has high production cost to varying degrees, serious environmental pollution in the production process or the prepared calcium stearate is in accordance with the chemical industry standard of the People's Republic of China "HG / T 2424- In 2012 Calcium Stearate, some indicators failed to meet the standards, especially the high content of free acid and low melting point. The preparation process and quality still need to be further improved

Method used

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  • Calcium stearate and preparation process thereof
  • Calcium stearate and preparation process thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation of embodiment 1 calcium stearate

[0027] S1: Take glyceryl tristearate, stir while feeding, keep the temperature at 100°C, add catalyst A, antioxidant and water after the glyceryl tristearate is completely melted, at a temperature of 140°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;

[0028] Wherein, by mass ratio, in catalyst A, calcium hydroxide: Al 2 o 3 -MgO is 1:9, its dosage is 6% 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;

[0029] In terms of mass ratio, in antioxidants, antioxidant DLTDP: antioxidant T501 is 0.55: 1, and its consumption is 0.3% of the glyceryl tristearate quality;

[0030] By mass ratio, glyceryl tristearate: water is 1: 0.5;

[0031] S2: Add the st...

Embodiment 2

[0036] The preparation of embodiment 2 calcium stearate

[0037] S1: Take glyceryl tristearate, stir while feeding, keep the temperature at 90°C, add catalyst A, antioxidant and water after the glyceryl tristearate is completely melted, at a temperature of 130°C, a pressure of 0.8MPa Carry out hydrolysis reaction under the condition of condition, hydrolyzate stands still 50min, oil-water separation, oil phase pressure filtration reclaims catalyst and promptly obtains stearic acid;

[0038] Wherein, by mass ratio, in catalyst A, calcium hydroxide: Al 2 o 3 -MgO is 1:10, its dosage is 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 2.5:1;

[0039] In terms of mass ratio, in antioxidants, antioxidant DLTDP: antioxidant T501 is 0.45: 1, and its consumption is 0.4% of tristearin quality;

[0040] By mass ratio, glyceryl tristearate: water is 1: 0.6;

[0041] S2: Add the stearic acid in S1 into the c...

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Abstract

The invention belongs to the technical field of chemical engineering and particularly relates to calcium stearate and a preparation process thereof. The calcium stearate is prepared from tristearin, a catalyst A, an antioxidant, water, calcium oxide, a catalyst B and sodium hydroxide, wherein the catalyst A is a mixture of calcium hydroxide and Al2O3-MgO, and the antioxidant is a mixture of DLTDP and an antioxidant T501; the catalyst B is selected from one or more of peroxides. The calcium stearate is low in raw material cost, high in yield, good in color, low in free acid content, high in melting point and stable in property, and related quality indexes meet the requirement of Chemical Industry Standard of the People's Republic of China HG / T 2424-2012 Calcium Stearate for superior products. The preparation process of the calcium stearate is safe and environment friendly in production process, low in energy consumption and low in overall production cost, and is more practical and comparable than 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 calcium stearate and a preparation process thereof. Background technique [0002] Calcium stearate is a kind of stearate, which is mainly used as a non-toxic heat stabilizer for polyvinyl chloride and a lubricant and release agent for various plastic processing. In addition, calcium stearate can also be used as a halogen absorbent for polyethylene and polypropylene to eliminate the adverse effects of residual catalysts on color and stability during the preparation of polyethylene and polypropylene; calcium stearate is also used as a polyolefin Lubricants for fibers and molding compounds, thickeners for grease, waterproofing agents for textiles, flat mirrors for paint, plasticizers for rubber processing and plastic records, etc., are widely used, and the market demand is increasing year by year. [0003] At present, the domestic production methods of calcium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/41C07C51/09C07C53/126B01J23/02
CPCB01J23/04C07C51/09C07C51/412C07C53/126
Inventor 严一丰严睛
Owner HUIZHOU AIMSEA NEWWAY TECH CO LTD
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