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Method for preparing calcium-zinc composite heat stabilizer for PVC by utilizing crude lanolin fatty acid

A technology of calcium-zinc composite and heat stabilizer, which is applied in the field of preparation of calcium-zinc composite heat stabilizer and calcium-zinc composite heat stabilizer, can solve the problems of wool acid waste, etc., and achieve simple preparation process, wide source, easy The effect of the operation

Inactive Publication Date: 2011-04-06
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of method that utilizes crude wool acid to prepare PVC calcium-zinc composite thermal stabilizer, the method adopts crude wool acid as main raw material, solves the by-product when industry adopts lanolin as raw material to prepare cholesterol The problem of waste of wollen acid, and it is applied in the preparation of metal soaps in plastic heat stabilizers, so as to exert its polybasic acid and strong lubricating performance, turn waste into treasure, and provide a step forward for calcium zinc lanolate soap The preparation process of this method is simple, easy to operate and has good effect, and the product has excellent performance

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0014] The steps of preparation method are:

[0015] ① Melt the crude wool acid at 40-100°C;

[0016] ② Sodium hydroxide is dissolved in ethanol-water solution at 50-100°C; ethanol-water solution is ethanol-water mixed solution with ethanol volume concentration of 80-85%.

[0017] ③The lanolic acid melted in the step ① is gradually added to the solution in the step ②, and the saponification reaction is stirred at 50-100° C. for 1-4 hours; the mass ratio of the crude wool acid to sodium hydroxide is 5.3: 1~ 8:1; the reaction principle is RCOOH+NaOH→RCOONa+H 2 O, wherein RCOOH is lanolic acid;

[0018] ④ Adjust the pH of the reaction solution to 7.0-9.0 while it is hot, then cool it down to 40-70°C, add a certain volume of warm water (reaction solution: water = 1:9-1:4 volume ratio), and then add chlorinated Calcium and zinc sulfate heptahydrate, after reacting for 1 to 4 hours, the product will be finished product after suction filtration, alcohol washing, water washing, dry...

Embodiment 1

[0022] best practice

[0023] ① Saponification reaction of wollen acid: Weigh 3.75g of sodium hydroxide, then dissolve it in ethanol-water mixture with ethanol volume concentration of 80-85% at 75-78°C, and then add it while stirring 20g of molten crude woolic acid was stirred and reacted for 2h.

[0024] ②Metathesis reaction of sodium lannate soap: adjust the pH of the saponified liquid to 8.0-8.5 while it is hot, then cool down to 60°C, add warm water at 60-70°C (saponified liquid: water = 1:6 volume ratio), and wait for the saponified liquid to After stirring evenly, sequentially add 3.9g of CaCl 2 and 3.37g of ZnSO 4 ·7H 2 O. After reacting for 1 hour, filter the product with suction, wash it with water for 3 to 4 times, dry it, and grind it to get the finished product.

Embodiment 2

[0026] The steps of preparation method are:

[0027] ① Melt the crude wool acid at 40°C;

[0028] ② Dissolve sodium hydroxide in ethanol-water solution at 50°C; ethanol-water solution is an ethanol-water mixture with an ethanol volume concentration of 80%.

[0029] ③The lanolic acid melted in the step ① is gradually added to the solution in the step ②, and the saponification reaction is stirred at 50° C. for 1 hour; the mass ratio of the crude wool acid to sodium hydroxide is 5.3:1; the reaction principle is RCOOH +NaOH→RCOONa+H 2 O, wherein RCOOH is lanolic acid;

[0030] ④ Adjust the pH of the reaction solution to 7.0 while it is hot, then cool it down to 40°C, add a certain volume of warm water at 60°C (reaction solution: water = 1:7 volume ratio), then add calcium chloride and zinc sulfate heptahydrate in sequence , After 2 hours of reaction, the product is finished product after suction filtration, alcohol washing, water washing, drying and grinding; the reaction princ...

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Abstract

The invention provides a method for preparing a calcium-zinc composite heat stabilizer for PVC by utilizing a crude lanolin fatty acid, which comprises the steps of melting the crude lanolin fatty acid, dissolving sodium hydroxide in ethanol-aqueous solution, gradually adding the molten lanolin fatty acid to sodium hydroxide ethanol solution, stirring, saponification reacting, regulating pH value when the reaction solution is hot, lowering temperature, adding warm water firstly, then adding calcium salt and zinc salt in sequence, after reaction for a period, conducting suction filtration alcohol washing, water washing, drying and pulverizing on product to obtain finished product. The method adopts the crude lanolin fatty acid as a main raw material, solves the waste problem of the byproduct-lanolin fatty acid when the industry adopts lanoline as a raw material to prepare cholesterine, and applies the byproduct-lanolin fatty acid to the preparation of metallic soap type substance in plastic heat stabilizers so as to achieve the polybasic acid and stronger lubricating properties thereof and change waste into valuable. The invention provides a one-step preparation technical method of lanolin fatty acid calcium / zinc soap, the method is simple in preparation flow, easy for operation, good in effect and excellent in product property.

Description

technical field [0001] The invention belongs to the technical field of chemical preparations, and more specifically relates to a preparation method of a novel non-toxic, high-efficiency and environment-friendly calcium-zinc composite heat stabilizer for PVC, especially a calcium-zinc lanolate composite heat stabilizer. Background technique [0002] At present, the metal soap stabilizer is the second largest main stabilizer after the lead salt. The metal soap can be the metal (lead, barium, cadmium, etc.) of fatty acids (lauric acid, stearic acid, naphthenic acid, etc.). , zinc, calcium, etc.) salts, among which stearate is the most commonly used, and its activity order is: Zn salt>Cd salt>Pb salt>Ca salt>Ba salt. In addition, considering factors such as environmental protection, non-toxicity and low price, zinc salts have good initial coloring inhibition effect, and can avoid zinc burning when used together with calcium salts, so calcium-zinc compound salts are w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/098C08L27/06
Inventor 郑玉婴
Owner FUZHOU UNIV