Preparation method of PVC heat stabilizer

A heat stabilizer and filter cake technology, which is applied in the field of PVC heat stabilizer preparation, can solve problems such as unstable quality, poor lipophilicity, and low alkali capacity of alkaline clay, and achieve stable quality, good compatibility, The effect of shortening the production process cycle

Inactive Publication Date: 2016-08-03
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 alkali capacity, unstable quality and poor lipophilicity of alkaline clay in the prior art.

Method used

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  • Preparation method of PVC heat 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 13%-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 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%, the inorganic mixed acid is sulfuric acid with a concentration of 16-18wt%, carbonic acid with a concentration of 32-36wt%, and 18-20wt% oxalic acid is a mixed acid composed of 2-6:3-5:2-3 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 ammonium sulfide and stir at 550r / min, the weight ratio of ammonium sulfide to slurry material A is 1-2:50-150, heat to 82-93°C, keep at 82-93°C for 1.2-3.2h to obtain Slurry material B;

[0040] S3: press-filter the slurry material B prepared in step S2 at a pressur...

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 15% in 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%, the inorganic mixed acid is sulfuric acid with a concentration of 17wt%, carbonic acid with a concentration of 34wt%, and oxalic 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, add ammonium sulfide and stir at a speed of 400r / min, the weight ratio of ammonium sulfide to slurry material A is 2 : 120, heated to 85° C., kept at 85° C. for 2.5 h to make slurry material B;

[0053] S3: press-filter the slurry material B prepared in step S2 under a pressure of 0.92 MPa to obtain a filter cake A with a water c...

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 sulfuric acid with a concentration of 18wt%, carbonic acid with a concentration of 36wt%, and oxalic 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 ammonium sulfide and stir at a speed of 550r / min, the weight ratio of ammonium sulfide to slurry material A is 2 : 150, heated to 93 DEG C, kept at 93 DEG C for 1.2h reaction, obtained slurry material B;

[0065] S3: press-filter the slurry material B prepared in step S2 at a pressure of 0.95 MPa to obtain a fi...

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Abstract

The invention discloses a preparation method of a PVC heat stabilizer, and belongs to the technical field of deep processing of bentonite. The PVC heat stabilizer is prepared by the following steps of: ingredient pulping, acid activating reaction, filter pressing, alkalization, alkaline clay particle surface modification, drying, crushing and the like. According to the produced PVC heat stabilizer, the NaOH content is 40wt%-43wt%; the active index is 96%-98%; the heat stabilization time is 153-160 minutes. The produced PVC heat stabilizer is load-type; the shape and form of the heat stabilizer are kept invariable after hydrogen chloride is adsorbed; no salt or organic material is released to pollute PVC; the prepared PVC heat stabilizer is nontoxic, tasteless, safe and environmentally friendly.

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 Applications(China)
IPC IPC(8): C08L27/06C08K9/12C08K9/08C08K3/22C08K3/34
CPCC08K9/12C08K3/22C08K3/346C08K9/08C08L2201/08C08L27/06
Inventor 梁福珏梁福瑜
Owner GUANGXI LONGAN RUIFENG IND TRADING CO LTD
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