Preparation method of modified bentonite PVC heat stabilizer

A technology of heat stabilizer and bentonite, applied in the field of preparation of modified bentonite PVC heat stabilizer, can solve the problems of low alkali capacity, poor lipophilicity and unstable quality of alkaline clay, and achieve shortened production process cycle and compatibility. Good quality, stable effect

Inactive Publication Date: 2016-09-21
GUANGXI LONGAN RUIFENG IND TRADING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved in the present invention is to provide a preparation method of modified bentonite PVC heat

Method used

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  • Preparation method of modified bentonite PVC heat stabilizer

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[0039] A preparation method of modified bentonite PVC heat stabilizer, comprising the following steps:

[0040] S1: mix bentonite and activated clay wastewater with a concentration of 7%-16% in a weight ratio of 1-2.2:3.5-14, and stir evenly at a rotating speed of 100-400r / min to obtain slurry material A;

[0041] 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%, hydrochloric acid with a concentration of 34-36wt%, and 20-22wt% phosphoric acid is a mixed acid composed of 2-6:3-5:1-2 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 reducing agent and stir under the condition of 550r / min. The reducing agent includes one or more of sodium hydrosulfide, sodium sulfide, sodium disulfide, sodium polysulfide, and ammonium sulfide. The weight ratio of reducing agent to slurry ma...

Embodiment 1

[0052] A preparation method of modified bentonite PVC heat stabilizer, comprising the following steps:

[0053] S1: Mix bentonite and activated clay wastewater with a concentration of 10% at a weight ratio of 1.5:9, and stir evenly at a rotating speed of 300r / min to obtain slurry material A;

[0054] S2: Add the slurry material A prepared in step S1 into the inorganic mixed acid with a concentration of 16%, and the inorganic mixed acid is sulfuric acid with a concentration of 17wt%, hydrochloric acid with a concentration of 35wt%, and phosphoric acid with a concentration of 22wt% by volume The mixed acid composed of 3:3:2, the weight ratio of the slurry material A to the inorganic mixed acid is 2:10, and sodium hydrosulfide is added under the condition of rotating speed of 400r / min to stir, the weight of sodium hydrosulfide and the 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;

[0055] S3: press-filter the slurry ...

Embodiment 2

[0064] A preparation method of modified bentonite PVC heat stabilizer, comprising the following steps:

[0065] 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 400r / min to obtain a slurry material A;

[0066] 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%, hydrochloric acid with a concentration of 36wt%, phosphoric acid with a concentration of 22wt% by volume The mixed acid of 6:5:2 composition, the weight ratio of slurry material A and inorganic mixed acid is 3.2:16, add sodium sulfide and stir under the condition of 550r / min at rotating speed, the weight ratio of sodium sulfide and slurry material A is 2:150, heated to 93°C, kept at 93°C for 1.2h to prepare slurry material B;

[0067] S3: press-filter the slurry material B prepared in step S2 u...

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Abstract

The invention discloses a preparation method of modified bentonite PVC heat stabilizer, and belongs to the technical field of bentonite deep processing. The modified bentonite PVC heat stabilizer is prepared by the steps such as preparation of material, slurrying, acid activation reaction, filter pressing, alkalization, surface modification of alkaline white clay particles, drying, and crushing. The alkali content of the modified bentonite PVC heat stabilizer prepared by the invention is 41-45wt%, the activity index is 97%-99%, and the heat-stable time is 152-161 min. The modified bentonite PVC heat stabilizer prepared by the invention is loaded type, the form of the heat stabilizer remains unchanged after adsorbing hydrogen chloride, and the heat stabilizer does not release salt or organic matter to pollute PVC. The modified bentonite PVC heat stabilizer prepared by the invention 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 modified bentonite 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 ca...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08K9/04C08K9/02C08K3/34C01B33/40
CPCC08K9/08C01B33/40C08K3/346C08K9/02C08K9/04C08L2201/08C08L27/06
Inventor 梁福珏梁福瑜
Owner GUANGXI LONGAN RUIFENG IND TRADING CO LTD
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