Method for producing PVC profile by taking phosphogypsum-produced hemihydrate gypsum and anhydrite as filler

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

Inactive Publication Date: 2016-02-17
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] The invention provides a method for producing hemihydrate gypsum+anhydrite as a filler to produce PVC profiles with phosphogypsum, comprising the following raw materials: 70kg of polyvinyl chloride resin, 30kg of phosphogypsum, 3kg of stabilizer, 0.5kg of antioxidant, lubricant 1kg, compound plasticizer 5kg; of which:

[0020] The stabilizer is an equal amount of isooctyl antimony trimercaptoacetate, amidinothiourea, and magnesium-aluminum-zinc ternary hydrotalcite.

[0021] The antioxidant is p-, p-octyl diphenylamine, carbamate, alkylated phenyl-α-naphthylamine, octyl-butyl diphenylamine, ester-containing phenol, ester-containing hindered phenol, containing One or more types of thioether phenols.

[0022] The lubricant is at least one of stearyl alcohol, paraffin, trimethylolpropane, oleamide, dioctadecyldimethylammonium chloride, abietic acid and polydimethylsiloxane.

[0023] The composite plasticizer is at least one of palm oil, dioctyl phthalate, diisooctyl phth...

Embodiment 2

[0030] The present invention provides a method for producing hemihydrate gypsum + anhydrite as a filler to produce PVC profiles with phosphogypsum, comprising the following raw materials: 100kg of polyvinyl chloride resin, 45kg of phosphogypsum, 6kg of stabilizer, 2kg of antioxidant, and 2kg of lubricant , Composite plasticizer 10kg; of which:

[0031] The stabilizer is an equal amount of isooctyl antimony trimercaptoacetate, amidinothiourea, and magnesium-aluminum-zinc ternary hydrotalcite.

[0032] The antioxidant is p-, p-octyl diphenylamine, carbamate, alkylated phenyl-α-naphthylamine, octyl-butyl diphenylamine, ester-containing phenol, ester-containing hindered phenol, containing One or more types of thioether phenols.

[0033] The lubricant is at least one of stearyl alcohol, paraffin, trimethylolpropane, oleamide, dioctadecyldimethylammonium chloride, abietic acid and polydimethylsiloxane.

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

Embodiment 3

[0041] The present invention provides a method for producing hemihydrate gypsum+anhydrite as a filler to produce PVC profiles with phosphogypsum, comprising the following raw materials: 90kg of polyvinyl chloride resin, 40kg of phosphogypsum, 4kg of stabilizer, 1kg of antioxidant, and 1kg of lubricant , Composite plasticizer 5kg; Among them:

[0042] The stabilizer is an equal amount of isooctyl antimony trimercaptoacetate, amidinothiourea, and magnesium-aluminum-zinc ternary hydrotalcite.

[0043] The antioxidant is p-, p-octyl diphenylamine, carbamate, alkylated phenyl-α-naphthylamine, octyl-butyl diphenylamine, ester-containing phenol, ester-containing hindered phenol, containing One or more types of thioether phenols.

[0044] The lubricant is at least one of stearyl alcohol, paraffin, trimethylolpropane, oleamide, dioctadecyldimethylammonium chloride, abietic acid and polydimethylsiloxane.

[0045] The composite plasticizer is at least one of palm oil, dioctyl phthalate...

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Abstract

The invention provides a method for producing a PVC profile by taking phosphogypsum-produced hemihydrate gypsum and anhydrite as filler. According to the invention, phosphogypsum is taken as a raw material to produce the PVC profile, so that the phosphogypsum replaces calcium powder in the traditional PVC profile production process, the source of the calcium powder for the PVC is expanded, the costs of the calcium powder for producing the PVC profile are reduced, the comprehensive utilization way of the phosphogypsum is expanded, and the comprehensive utilization rate of the phosphogypsum is improved. Furthermore, the hemihydrate gypsum and the anhydrite are respectively produced by utilizing the phosphogypsum and are taken as the filler to produce the PVC profile, so that the cooling time of the PVC profile to be produced is shortened, and furthermore, the PVC profile has a more compact structure; therefore, the hardness of the PVC profile can be improved, the produced PVC profile 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 hemihydrate gypsum+anhydrite from phosphogypsum as fillers 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 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K13/02C08K3/30B29C47/92B29C48/92
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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