Novel environment-friendly PVC (polyvinyl chloride) heat stabilizer

A heat stabilizer and environmental protection technology, applied in the field of deep processing of bentonite, can solve the problems of low alkali capacity, poor lipophilicity and unstable quality of alkaline clay, and achieve a shortened production process cycle, good compatibility, and stable quality. Effect

Inactive Publication Date: 2016-08-24
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 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 novel environment-friendly PVC thermal 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 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 hydrochloric acid with a concentration of 25-30wt%, oxalic acid with a concentration of 28-32wt%, 18-20wt% phosphoric acid is a mixed acid composed of a volume ratio of 3-6:2-4:2-3, 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 sulfide and stir at 550r / min, the weight ratio of sodium 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 materi...

Embodiment 1

[0050] A novel environment-friendly PVC thermal 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%, and the inorganic mixed acid is hydrochloric acid with a concentration of 28wt%, oxalic acid with a concentration of 28wt%, and phosphoric acid with a concentration of 18wt% by volume Mixed acid composed of 4:3:3, the weight ratio of slurry material A to inorganic mixed acid is 2:10, add sodium sulfide and stir at a speed of 400r / min, the weight ratio of sodium 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 at a pressure of 0.92 MPa ...

Embodiment 2

[0062] A novel environment-friendly PVC thermal 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: The slurry material A prepared in step S1 is added to the inorganic mixed acid with a concentration of 20%, and the inorganic mixed acid is hydrochloric acid with a concentration of 30wt%, oxalic acid with a concentration of 32wt%, and phosphoric acid with a concentration of 20wt% by volume Mixed acid composed of 6:4:3, the weight ratio of slurry material A to inorganic mixed acid is 3.2:16, add sodium sulfide and stir at a speed of 550r / min, the weight ratio of sodium 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 pressur...

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Abstract

The invention discloses a novel environment-friendly PVC (polyvinyl chloride) heat stabilizer, and belongs to the field of deep-processing technologies for bentonite. The novel environment-friendly PVC heat stabilizer is prepared via steps of ingredient pulping, acid activation reaction, pressure filtration, alkalinization, alkaline argil particle surface modification, drying, smashing and the like. The novel environment-friendly PVC heat stabilizer has the advantages that the Ca(OH)2 content of the novel environment-friendly PVC heat stabilizer is 42-44wt%, the activity index of the novel environment-friendly PVC heat stabilizer is 96%-99%, and the heat stabilization time of the novel environment-friendly PVC heat stabilizer is 152-158 min; the novel environment-friendly PVC heat stabilizer is of a load type, the form of the novel environment-friendly PVC heat stabilizer keeps unchanged after hydrogen chloride is adsorbed, and PVC can be prevented from being contaminated by released salt or organic pollutants; the novel environment-friendly PVC heat stabilizer is non-toxic, odor-less and safe and is environmentally friendly.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K9/12C08K3/22C08K3/34
CPCC08K9/12C08K3/22C08K3/346C08K2003/2206C08L2201/08
Inventor 张莘蔓
Owner 张莘蔓
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