Method for producing PVC (polyvinyl chloride) section bar by preparing beta-semi-hydrated gypsum from phosphogypsum as filler

A technology of hemihydrate gypsum and phosphogypsum, applied in the field of PVC pipe production, can solve the problems of less than 10%, achieve the effects of improving hardness, improving comprehensive utilization rate, and reducing cost

Inactive Publication Date: 2016-02-24
GUIZHOU KAILIN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a large number of researchers began to engage in the comprehensive utilization research of phosphogypsum, and used phosphogypsum as a raw material for building materials, such as thermal insulation blocks, etc.; some researchers used it as a raw material for the preparation of calcium oxide and sulfur dioxide etc.; but despite this, the annual comprehensive utilization rate of phosphogypsum is less than 10%, making the comprehensive utilization and development of phosphogypsum still need to further increase the process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for producing β-hemihydrate gypsum from phosphogypsum as a filler to produce PVC profiles provided by the invention comprises the following raw materials: 70kg of polyvinyl chloride resin, 30kg of phosphogypsum, 3kg of stabilizer, 0.5kg of antioxidant, and 1kg of lubricant , compound plasticizer 5kg;

[0020] Further, the stabilizer is an equal amount of isooctyl antimony trimercaptoacetate and magnesium-aluminum binary structure hydrotalcite.

[0021] Further, the antioxidant is p-, p-octyl diphenylamine, carbamate, alkylated phenyl-α-naphthylamine, octyl-butyl diphenylamine, ester-containing phenol, ester-containing hindered Phenol, one or more types of thioether group-containing phenols.

[0022] Further, the lubricant is at least one of stearyl alcohol, paraffin, trimethylolpropane, oleamide, dioctadecyldimethyl ammonium chloride, abietic acid, polydimethylsiloxane kind.

[0023] Further, the composite plasticizer is at least one of palm oil, dioctyl pht...

Embodiment 2

[0030] A method for producing β-hemihydrate gypsum from phosphogypsum as a filler to produce PVC profiles provided by the invention comprises the following raw materials: 100kg of polyvinyl chloride resin, 45kg of phosphogypsum, 6kg of stabilizer, 2kg of antioxidant, 2kg of lubricant, Composite plasticizer 10kg;

[0031] Further, the stabilizer is an equal amount of isooctyl antimony trimercaptoacetate and magnesium-aluminum binary structure hydrotalcite.

[0032] Further, the antioxidant is p-, p-octyl diphenylamine, carbamate, alkylated phenyl-α-naphthylamine, octyl-butyl diphenylamine, ester-containing phenol, ester-containing hindered Phenol, one or more types of thioether group-containing phenols.

[0033] Further, the lubricant is at least one of stearyl alcohol, paraffin, trimethylolpropane, oleamide, dioctadecyldimethyl ammonium chloride, abietic acid, polydimethylsiloxane kind.

[0034] Further, the composite plasticizer is at least one of palm oil, dioctyl phthala...

Embodiment 3

[0041] A method for producing β-hemihydrate gypsum from phosphogypsum as a filler to produce PVC profiles provided by the invention comprises the following raw materials: 90kg of polyvinyl chloride resin, 40kg of phosphogypsum, 4kg of stabilizer, 0.5kg of antioxidant, and 1 kg of lubricant ~2kg, compound plasticizer 5kg;

[0042] Further, the stabilizer is an equal amount of isooctyl antimony trimercaptoacetate and magnesium-aluminum binary structure hydrotalcite.

[0043]Further, the antioxidant is p-, p-octyl diphenylamine, carbamate, alkylated phenyl-α-naphthylamine, octyl-butyl diphenylamine, ester-containing phenol, ester-containing hindered Phenol, one or more types of thioether group-containing phenols.

[0044] Further, the lubricant is at least one of stearyl alcohol, paraffin, trimethylolpropane, oleamide, dioctadecyldimethyl ammonium chloride, abietic acid, polydimethylsiloxane kind.

[0045] Further, the composite plasticizer is at least one of palm oil, dioctyl...

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Abstract

The invention provides a method for producing a PVC (polyvinyl chloride) section bar by preparing beta-semi-hydrated gypsum from phosphogypsum as a filler. The PVC section bar is prepared from the following raw materials in parts by weight: 70-100 parts of polyvinyl chloride resin, 30-45 parts of the phosphogypsum, 3-6 parts of a stabilizer, 0.5-2 parts of an anti-oxidant, 1-2 parts of a lubricant and 5-10 parts of a composite plasticizer. According to the method, the phosphogypsum is taken as the raw material to produce the PVC section bar, so that the phosphogypsum replaces calcium powder in the preparation process of a conventional PVC section bar, the source of the calcium powder for PVC is expanded, the cost of the calcium powder for PVC production is reduced, the comprehensive utilization way of the phosphogypsum is expanded, and the comprehensive utilization rate of the phosphogypsum is improved; the phosphogypsum is used for producing a part of the beta-semi-hydrated gypsum and the beta-semi-hydrated gypsum is taken the filler to manufacture the PVC section bar, so that the cooling time for manufacturing the PVC section bar is shortened, the PVC section bar has a relatively compact structure, the hardness of the PVC section bar can be improved, and the manufactured PVC section bar has compression resistance, stretching resistance and wear resistance.

Description

technical field [0001] The invention relates to the technical field of PVC pipe production, in particular to a method for producing β-hemihydrate gypsum from phosphogypsum as a filler to produce PVC profiles. Background technique [0002] Phosphogypsum is the solid waste of the phosphate fertilizer industry, and phosphoric acid is the foundation of the phosphate fertilizer industry. The wet process phosphoric acid production process is the most commonly used phosphoric acid production process. In the wet-process phosphoric acid production process, sulfuric acid is first used to decompose phosphate rock powder to produce extraction slurry, and then filter and wash to obtain phosphoric acid, and phosphogypsum waste will be generated during the process of filter and wash. Generally, about 5-6 tons of phosphogypsum are produced for every ton of phosphoric acid produced, and 2.5-5 tons of phosphogypsum are discharged for every ton of diammonium phosphate produced. With the rapi...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08K13/02C08K3/30C08K5/37C08K3/26B29C47/92B29C48/92
Inventor 杨步雷杨永彬向前勇李泽钢王伟
Owner GUIZHOU KAILIN GRP CO LTD
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