Novel environment-friendly modified bentonite PVC heat stabilizer

A technology of heat stabilizer and bentonite, which is applied in the field of new environment-friendly modified bentonite PVC heat stabilizer, can solve the problems of unstable quality, low alkali capacity of alkaline clay, poor lipophilicity, etc. Shortening and good compatibility

Inactive Publication Date: 2016-10-26
张莘蔓
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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 new type of environmentally friendly modified bentonite 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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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] A kind of novel environmental protection modified bentonite PVC heat stabilizer, its preparation method comprises 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%, the inorganic mixed acid is carbonic acid with a concentration of 22-26wt%, oxalic acid with a concentration of 28-32wt%, and 18-20wt% phosphoric acid is a mixed acid composed of a volume ratio of 3-5:2-4:2-3, the weight ratio of the slurry material A to the inorganic mixed acid is 1-3.2:4-16, and the rotating speed is 200- Add sodium trisulfide and stir at 550r / min, the weight ratio of sodium trisulfide to slurry material A is 1-2:50-150, heat to 82-93°C, keep at 82-93°C for 1.2-3.2h, Obtain slurry material B;

...

Embodiment 1

[0050] A kind of novel environmental protection modified bentonite PVC heat stabilizer, its preparation method comprises 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 rotation speed of 400r / min to obtain 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 carbonic acid with a concentration of 22wt%, oxalic acid with a concentration of 28wt%, and phosphoric acid with a concentration of 18wt% by volume Mixed acid composed of 3:2:2, the weight ratio of slurry material A to inorganic mixed acid is 2:10, add sodium trisulfide and stir at a speed of 400r / min, the weight ratio of sodium trisulfide to slurry material A 2:120, heated to 85°C, kept at 85°C for 2.5h to prepare slurry material B;

[0053] S3: press-filter the slurry material B prepared in step S2 at a pr...

Embodiment 2

[0062] A kind of novel environmental protection modified bentonite PVC heat stabilizer, its preparation method comprises 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 speed of 500r / min to obtain a slurry material A;

[0064] S2: Add the slurry material A prepared in step S1 into the inorganic mixed acid with a concentration of 20%, the inorganic mixed acid is carbonic acid with a concentration of 26wt%, oxalic acid with a concentration of 32wt%, and phosphoric acid with a concentration of 20wt% by volume Mixed acid composed of 5:4:3, the weight ratio of slurry material A to inorganic mixed acid is 3.2:16, add sodium trisulfide and stir at a speed of 550r / min, the weight ratio of sodium trisulfide to slurry material A 2:150, heated to 93°C, kept at 93°C for 1.2h to prepare slurry material B;

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

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Abstract

The invention discloses a novel environment-friendly modified bentonite PVC heat stabilizer, which belongs to the technical field of deep processing of bentonite. The novel environment-friendly modified bentonite PVC heat stabilizer is prepared in the following steps of material preparing, pulping, acid activation reaction, filter pressing, alkalization, surface modification of alkaline clay particles, drying, crushing and the like. According to the novel environment-friendly modified bentonite PVC heat stabilizer disclosed by the invention, the Ca(OH)2 content is 41 to 43 wt%, the activity index is 97% to 99%, and the heat stable time is 153 to 158 min; the novel environment-friendly modified bentonite PVC heat stabilizer disclosed by the invention is loaded, the form of the heat stabilizer remains unchanged after adsorbing hydrogen chloride, and salt or organic pollutants PVC cannot be released; the novel environment-friendly modified bentonite PVC heat stabilizer disclosed by the invention has the advantages of no toxicity, no odor, safety and environmental friendliness.

Description

technical field [0001] The invention belongs to the technical field of bentonite deep processing, and in particular relates to a novel environmentally friendly 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K9/04C08K9/02C08K3/34
CPCC08K3/346C08K9/02C08K9/04C08K9/08C08L2201/08C08L27/06
Inventor 张莘蔓
Owner 张莘蔓
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