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A kind of preparation method of PVC thermal stabilizer

A heat stabilizer and filter cake technology, which is applied in the field of PVC heat stabilizer preparation, can solve the problems of unstable quality, poor lipophilicity, and low alkaline capacity of activated clay loaded with calcium hydroxide, and achieve stable and compatible quality The effect of good performance and shortened production process cycle

Active Publication Date: 2017-10-24
GUANGXI LONGAN RUIFENG IND TRADING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved in the present invention is to provide a preparation method of PVC heat stabilizer to solve the problems of low alkaline capacity, unstable quality and poor lipophilicity of loaded calcium hydroxide active clay in the prior art.

Method used

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  • A kind of preparation method of PVC thermal stabilizer

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preparation example Construction

[0037] A preparation method of PVC heat stabilizer, comprising the following steps:

[0038] S1: Mix bentonite and activated clay wastewater with a concentration of 10%-16% in a weight ratio of 1.6-2.2:10-14, and stir evenly at a rotating speed of 200-500r / min to obtain a slurry material A;

[0039] S2: Add the slurry material A prepared in step S1 to the inorganic mixed acid with a concentration of 11%-20%, and the mixed inorganic acid is hydrochloric acid with a concentration of 25-30wt%, carbonic acid with a concentration of 32-36wt%, and a concentration of 32-36wt%. 18-20wt% phosphoric acid is a mixed acid composed of 3-6:3-5:2-3 by volume, the weight ratio of slurry material A to inorganic mixed acid is 1-3.2:4-16, and the rotating speed is 200- Add sodium disulfide and stir at 550r / min, the weight ratio of sodium disulfide to slurry material A is 1-2:50-150, heat to 82-93°C, and keep at 82-93°C for 1.2-3.2 h, making slurry material B;

[0040] S3: press-filter the slur...

Embodiment 1

[0050] A preparation method of PVC heat stabilizer, comprising the following steps:

[0051] S1: Mix bentonite and activated clay wastewater with a concentration of 12% at a weight ratio of 2:12, and stir evenly at a speed of 400r / min to obtain a slurry material A;

[0052] S2: Add the slurry material A prepared in step S1 into the inorganic mixed acid with a concentration of 15%, and the inorganic mixed acid is hydrochloric acid with a concentration of 28wt%, carbonic acid with a concentration of 34wt%, and phosphoric acid with a concentration of 19wt% by volume Mixed acid composed of 4:3:2, the weight ratio of slurry material A to inorganic mixed acid is 2:10, and sodium disulfide is added under the condition of rotating speed of 400r / min to stir, the weight of sodium disulfide and slurry material A The ratio is 2:120, heated to 85°C, and kept at 85°C for 2.5h to obtain slurry material B;

[0053] S3: press-filter the slurry material B prepared in step S2 under a pressure o...

Embodiment 2

[0062] A preparation method of PVC heat stabilizer, comprising the following steps:

[0063] S1: Mix bentonite and activated clay wastewater with a concentration of 16% at a weight ratio of 2.2:14, and stir evenly at a rotating speed of 500r / min to obtain slurry material A;

[0064] S2: Add the slurry material A prepared in step S1 into the inorganic mixed acid with a concentration of 20%, and the inorganic mixed acid is hydrochloric acid with a concentration of 30wt%, carbonic acid with a concentration of 36wt%, and phosphoric acid with a concentration of 20wt% by volume Mixed acid composed of 6:5:3, the weight ratio of slurry material A to inorganic mixed acid is 3.2:16, add sodium disulfide and stir under the condition of rotating speed of 550r / min, the weight of sodium disulfide and slurry material A The ratio is 2:150, heated to 93°C, and kept at 93°C for 1.2h to prepare slurry material B;

[0065] S3: press-filter the slurry material B prepared in step S2 under a pressu...

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Abstract

The invention discloses a preparation method of a novel PVC (polyvinyl chloride) heat stabilizer, and belongs to the technical field of deep processing of bentonite. The novel PVC heat stabilizer is prepared by the following steps of pulping of materials, acid activity reaction, press filtering, alkalizing, surface modifying of alkaline clay particle surface, drying, crushing and the like. The novel PVC heat stabilizer has the advantages that the content of Ca(OH)2 (calcium hydroxide) is 42-44wt%, the activity index is 97-99%, and the heat stabilizing time is 151-158min; the prepared novel PVC heat stabilizer is a loading type; after the hydrogen chloride is absorbed, the shape of heat stabilizer is constant, and the pollution to PVC caused by releasing of salt or organic matters is avoided; the poison and odor are avoided, and the safety and environment-protection effects are realized.

Description

【Technical field】 [0001] The invention belongs to the technical field of bentonite deep processing, and in particular relates to a preparation method of a PVC heat stabilizer. 【Background technique】 [0002] Bentonite is called natural nano material and universal clay. The quality of bentonite in my country is excellent, and its ore reserves rank second in the world. Except for a small amount of exports as raw materials for organic bentonite, the rest are sold domestically in the form of bentonite powder and activated clay. These products are primary products with low economic benefits and low resource utilization levels. . In order to obtain greater economic benefits, it is necessary to develop serialized new products with high-tech content and expand new areas of application. [0003] The patent application document "A preparation method of calcium hydroxide-loaded activated clay (application number: 201510081886.1)" discloses a preparation method of calcium hydroxide-loa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K9/02C08K9/12C08K9/04C08K3/34
CPCC08K3/346C08K9/02C08K9/08C08K9/12C08L27/06
Inventor 梁福珏梁福瑜
Owner GUANGXI LONGAN RUIFENG IND TRADING CO LTD
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