CN105348686A - Process for producing PVC (polyvinyl chloride) section bar by taking phosphogypsum as filler - Google Patents
Process for producing PVC (polyvinyl chloride) section bar by taking phosphogypsum as filler Download PDFInfo
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- CN105348686A CN105348686A CN201510845127.8A CN201510845127A CN105348686A CN 105348686 A CN105348686 A CN 105348686A CN 201510845127 A CN201510845127 A CN 201510845127A CN 105348686 A CN105348686 A CN 105348686A
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Abstract
The invention provides a process for producing a PVC (polyvinyl chloride) section bar by taking 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 antioxidant, 1-2 parts of a lubricant and 5-10 parts of a composite plasticizer. The process is mainly characterized in that the phosphogypsum is treated, crushed, soaked in a calcium hydroxide solution with the mass concentration of 10-40%, and roasted at the temperature of 600-900 DEG C after dehydration, then soaked in water, roasted at the temperature of 163-400 DEG C after dehydration to obtain anhydrite; and the anhydrite is ground into powder of 400-800 meshes. According to the process, a phosphogypsum crystal is modified, 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.
Description
Technical field
The present invention relates to pvc pipe production technical field, particularly relate to the technique of a kind of phosphogypsum as filler production PVC profile.
Background technology
Phosphogypsum is the solid waste of Phosphate Fertilizer Industry, and phosphoric acid is the basis of Phosphate Fertilizer Industry.Wet method phosphoric acid manufacture process is the phosphoric acid production technique commonly used the most.In wet method phosphoric acid manufacture process, first produce extraction slip by sulfuric acid decomposition ground phosphate rock, then filtration washing obtains phosphoric acid, and just can produce phosphogypsum waste in the process of filtration washing.General often production 1 ton of phosphoric acid about produces 5 ~ 6 tons of phosphogypsums, often produces 1 ton of diammonium phosphate and then can discharge 2.5 ~ 5 tons of phosphogypsums.Along with the fast development of China's high-concentration compound fertilizer industry in recent years, added up to by phosphate fertilizer class chemical enterprise and other enterprise (as composite additive) every year and be about more than 2,000 ten thousand tons.Therefore, there is a large amount of investigators to take to comprehensive utilizating research in phosphogypsum, and the raw material of phosphogypsum as material of construction is prepared, as insulation blocks etc.; Investigator is also had to it can be used as the raw material etc. preparing calcium oxide, sulfurous gas; However, be less than 10% to the comprehensive utilization ratio of phosphogypsum every year, the comprehensive utilization of phosphogypsum is developed also to be needed further to strengthen process.
In prior art, in polyvinyl chloride, add phosphogypsum (filler), coordinate stablizer, lubricant and other additives to make various PVC material product, as PVC, PVC profile, PVC board etc.And PVC is a kind of white powder of nontoxic, odorless, at home, the output of PVC and consumption all occupy first of five large resins for universal use; Based on this, launch to study to the filler of phosphogypsum as PVC material product herein, in conjunction with the production technique of PVC, design a set of technique utilizing phosphogypsum production PVC material product, for the comprehensive utilization of phosphogypsum provides new way.
Summary of the invention
For solving the problems of the technologies described above, the invention provides the technique of a kind of phosphogypsum as filler production PVC profile.
The present invention is achieved by the following technical programs.
A kind of phosphogypsum provided by the invention is as the technique of filler production PVC profile, comprise the raw material of following weight part: polyvinyl chloride (PVC) RESINS 70 ~ 100 parts, phosphogypsum 30 ~ 45 parts, stablizer 3 ~ 6 parts, antioxidant 0.5 ~ 2 part, lubricant 1 ~ 2 part, composite elasticizer 5 ~ 10 parts; Its technique is as follows:
1) phosphogypsum process, phosphogypsum is shattered the aqua calcis immersion that laggard mass concentration is excessively 10 ~ 40%, at the temperature lower calcination of 600 ~ 900 DEG C after dehydration, and then be soaked in water, at the temperature lower calcination of 163 ~ 400 DEG C after dehydration, obtain anhydrite, then carry out grinding to form 400 ~ 800 object powders;
2) batch mixing, anhydrite and polyvinyl chloride (PVC) RESINS, stablizer, antioxidant, lubricant, composite elasticizer are dropped in homogenizer, and is warming up to more than 120 ~ 135 DEG C, more than mix and blend 10min, then discharge material, and keep temperature of charge at 60 ~ 80 DEG C;
3) extrusion molding, puts into material and is placed in twin screw extruder, and barrel temperature controls at 120 ~ 180 DEG C, extrusion profile stock;
4) finished product, through cooling forming, cuts as requested and obtains finished product.
Further, described stablizer is calcium carboxylates, the zinc acetylacetonate of equivalent.
Further, described antioxidant is right, p octtttyl diphenylamine, carbamate, alkylation phenyl-a-naphthylamine, octyl group-butyl pentanoic, containing ester group phenol, containing ester group hindered phenol, and one or more of sulfur-bearing ether phenol.
Further, described lubricant is at least one in stearyl alcohol, paraffin, TriMethylolPropane(TMP), oleylamide, distearyl dimethyl ammonium chloride, sylvic acid, polydimethylsiloxane.
Further, described composite elasticizer is at least one in plam oil, dioctyl phthalate (DOP), dimixo-octyl phthalate and Phthalic acid, diallyl ester.
Further, described step 3) in barrel be divided into three sections, first paragraph barrel temperature is 150 ~ 170 DEG C, and second segment barrel temperature is 163 ~ 180 DEG C, and the 3rd section of barrel temperature is 120 ~ 150 DEG C.
Beneficial effect of the present invention is: in the present invention, first with calcium hydroxide, neutralizing treatment is carried out to phosphogypsum, and then the temperature lower calcination of 600 ~ 900 DEG C, part calcium carbonate is made to become calcium oxide, and remove part Vanadium Pentoxide in FLAKES, and then mix with water, calcium oxide is washed, finally carry out phosphogypsum processed again, the purity of the anhydrite obtained improves, simultaneously, by process repeatedly, the powder of the anhydrite being is even, it makes phosphogypsum instead of calcium powder in conventional P VC section bar preparation process, expand the source of PVC calcium powder, reduce the cost of PVC production calcium powder, expand phosphogypsum comprehensive Utilization Ways, improve phosphogypsum comprehensive utilization ratio, coordinate polyvinyl chloride (PVC) RESINS, stablizer, antioxidant, lubricant, composite elasticizer makes PVC profile, make its Stability Analysis of Structures, pull resistance is strong, hardness is high.
Embodiment
Further describe technical scheme of the present invention below, but described in claimed scope is not limited to.
Embodiment one
A kind of phosphogypsum provided by the invention, as the technique of filler production PVC profile, comprises following raw material: polyvinyl chloride (PVC) RESINS 70kg, phosphogypsum 30kg, stablizer 3kg, antioxidant 0.5kg, lubricant 1kg, composite elasticizer 5kg; Wherein:
Further, described stablizer is calcium carboxylates, the zinc acetylacetonate of equivalent.
Further, described antioxidant is right, p octtttyl diphenylamine, carbamate, alkylation phenyl-a-naphthylamine, octyl group-butyl pentanoic, containing ester group phenol, containing ester group hindered phenol, and one or more of sulfur-bearing ether phenol.
Further, described lubricant is at least one in stearyl alcohol, paraffin, TriMethylolPropane(TMP), oleylamide, distearyl dimethyl ammonium chloride, sylvic acid, polydimethylsiloxane.
Further, described composite elasticizer is at least one in plam oil, dioctyl phthalate (DOP), dimixo-octyl phthalate and Phthalic acid, diallyl ester.
Its technique is as follows:
1) phosphogypsum process, phosphogypsum is shattered the aqua calcis immersion that laggard mass concentration is excessively 10 ~ 40%, at the temperature lower calcination of 600 ~ 900 DEG C after dehydration, and then be soaked in water, at the temperature lower calcination of 163 ~ 400 DEG C after dehydration, obtain anhydrite, then carry out grinding to form 400 ~ 800 object powders;
2) batch mixing, anhydrite and polyvinyl chloride (PVC) RESINS, stablizer, antioxidant, lubricant, composite elasticizer are dropped in homogenizer, and is warming up to more than 120 ~ 135 DEG C, more than mix and blend 10min, then discharge material, and keep temperature of charge at 60 ~ 80 DEG C;
3) extrusion molding, puts into material and is placed in twin screw extruder, and barrel is divided into three sections, and first paragraph barrel temperature is 150 ~ 170 DEG C, and second segment barrel temperature is 163 ~ 180 DEG C, and the 3rd section of barrel temperature is 120 ~ 150 DEG C, extrusion profile stock;
4) finished product, through cooling forming, cuts as requested and obtains finished product.
Embodiment two
A kind of phosphogypsum provided by the invention, as the technique of filler production PVC profile, comprises following raw material: polyvinyl chloride (PVC) RESINS 100kg, phosphogypsum 45kg, stablizer 6kg, antioxidant 2kg, lubricant 2kg, composite elasticizer 10kg; Wherein:
Further, described stablizer is calcium carboxylates, the zinc acetylacetonate of equivalent.
Further, described antioxidant is right, p octtttyl diphenylamine, carbamate, alkylation phenyl-a-naphthylamine, octyl group-butyl pentanoic, containing ester group phenol, containing ester group hindered phenol, and one or more of sulfur-bearing ether phenol.
Further, described lubricant is at least one in stearyl alcohol, paraffin, TriMethylolPropane(TMP), oleylamide, distearyl dimethyl ammonium chloride, sylvic acid, polydimethylsiloxane.
Further, described composite elasticizer is at least one in plam oil, dioctyl phthalate (DOP), dimixo-octyl phthalate and Phthalic acid, diallyl ester.
Its technique is as follows:
1) phosphogypsum process, phosphogypsum is shattered the aqua calcis immersion that laggard mass concentration is excessively 10 ~ 40%, at the temperature lower calcination of 600 ~ 900 DEG C after dehydration, and then be soaked in water, at the temperature lower calcination of 163 ~ 400 DEG C after dehydration, obtain anhydrite, then carry out grinding to form 400 ~ 800 object powders;
2) batch mixing, anhydrite and polyvinyl chloride (PVC) RESINS, stablizer, antioxidant, lubricant, composite elasticizer are dropped in homogenizer, and is warming up to more than 120 ~ 135 DEG C, more than mix and blend 10min, then discharge material, and keep temperature of charge at 60 ~ 80 DEG C;
3) extrusion molding, puts into material and is placed in twin screw extruder, and barrel is divided into three sections, and first paragraph barrel temperature is 150 ~ 170 DEG C, and second segment barrel temperature is 163 ~ 180 DEG C, and the 3rd section of barrel temperature is 120 ~ 150 DEG C, extrusion profile stock;
4) finished product, through cooling forming, cuts as requested and obtains finished product.
Claims (6)
1. one kind by the technique of phosphogypsum as filler production PVC profile, it is characterized in that: the raw material comprising following weight part: polyvinyl chloride (PVC) RESINS 70 ~ 100 parts, phosphogypsum 30 ~ 45 parts, stablizer 3 ~ 6 parts, antioxidant 0.5 ~ 2 part, lubricant 1 ~ 2 part, composite elasticizer 5 ~ 10 parts; Its technique is as follows:
1) phosphogypsum process, phosphogypsum is shattered the aqua calcis immersion that laggard mass concentration is excessively 10 ~ 40%, at the temperature lower calcination of 600 ~ 900 DEG C after dehydration, and then be soaked in water, at the temperature lower calcination of 163 ~ 400 DEG C after dehydration, obtain anhydrite, then carry out grinding to form 400 ~ 800 object powders;
2) batch mixing, anhydrite and polyvinyl chloride (PVC) RESINS, stablizer, antioxidant, lubricant, composite elasticizer are dropped in homogenizer, and is warming up to more than 120 ~ 135 DEG C, more than mix and blend 10min, then discharge material, and keep temperature of charge at 60 ~ 80 DEG C;
3) extrusion molding, puts into material and is placed in twin screw extruder, and barrel temperature controls at 120 ~ 180 DEG C, extrusion profile stock;
4) finished product, through cooling forming, cuts as requested and obtains finished product.
2. phosphogypsum as claimed in claim 1 is as the technique of filler production PVC profile, it is characterized in that: described stablizer is calcium carboxylates, the zinc acetylacetonate of equivalent.
3. phosphogypsum as claimed in claim 1 is as the technique of filler production PVC profile, it is characterized in that: described antioxidant is right, p octtttyl diphenylamine, carbamate, alkylation phenyl-a-naphthylamine, octyl group-butyl pentanoic, containing ester group phenol, containing ester group hindered phenol, one or more of sulfur-bearing ether phenol.
4. phosphogypsum as claimed in claim 1 is as the technique of filler production PVC profile, it is characterized in that: described lubricant is at least one in stearyl alcohol, paraffin, TriMethylolPropane(TMP), oleylamide, distearyl dimethyl ammonium chloride, sylvic acid, polydimethylsiloxane.
5. phosphogypsum as claimed in claim 1 is as the technique of filler production PVC profile, it is characterized in that: described composite elasticizer is at least one in plam oil, dioctyl phthalate (DOP), dimixo-octyl phthalate and Phthalic acid, diallyl ester.
6. phosphogypsum as claimed in claim 1 is as the technique of filler production PVC profile, it is characterized in that: described step 3) in barrel be divided into three sections, first paragraph barrel temperature is 150 ~ 170 DEG C, and second segment barrel temperature is 163 ~ 180 DEG C, and the 3rd section of barrel temperature is 120 ~ 150 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510845127.8A CN105348686A (en) | 2015-11-29 | 2015-11-29 | Process for producing PVC (polyvinyl chloride) section bar by taking phosphogypsum as filler |
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| CN201510845127.8A CN105348686A (en) | 2015-11-29 | 2015-11-29 | Process for producing PVC (polyvinyl chloride) section bar by taking phosphogypsum as filler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007604A (en) * | 2016-05-13 | 2016-10-12 | 贵州开磷磷石膏综合利用有限公司 | Powdery gypsum for making high polymer material products and preparing method thereof |
| CN111607176A (en) * | 2020-05-25 | 2020-09-01 | 贵州利东环保科技有限公司 | Phosphogypsum composite PVC solid wall pipe and manufacturing process thereof |
| CN114716774A (en) * | 2022-05-25 | 2022-07-08 | 麦汉武 | Phosphogypsum stone-plastic base material and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103319762A (en) * | 2013-06-24 | 2013-09-25 | 清华大学 | Method for preparing high filling polyvinyl chloride or polyolefin composite material by employing industrial solid wastes |
| CN103372906A (en) * | 2012-04-26 | 2013-10-30 | 云南富强高新材料有限责任公司 | Method for producing decorative floors by using ardealite |
| CN103435937A (en) * | 2013-08-28 | 2013-12-11 | 贵州开磷遵义碱厂 | Method for using phosphogypsum as polyvinyl chloride resin filler |
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2015
- 2015-11-29 CN CN201510845127.8A patent/CN105348686A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103372906A (en) * | 2012-04-26 | 2013-10-30 | 云南富强高新材料有限责任公司 | Method for producing decorative floors by using ardealite |
| CN103319762A (en) * | 2013-06-24 | 2013-09-25 | 清华大学 | Method for preparing high filling polyvinyl chloride or polyolefin composite material by employing industrial solid wastes |
| CN103435937A (en) * | 2013-08-28 | 2013-12-11 | 贵州开磷遵义碱厂 | Method for using phosphogypsum as polyvinyl chloride resin filler |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007604A (en) * | 2016-05-13 | 2016-10-12 | 贵州开磷磷石膏综合利用有限公司 | Powdery gypsum for making high polymer material products and preparing method thereof |
| CN106007604B (en) * | 2016-05-13 | 2018-07-03 | 贵州开磷磷石膏综合利用有限公司 | It is a kind of to be used to make powder gypsum of macromolecule material product and preparation method thereof |
| CN111607176A (en) * | 2020-05-25 | 2020-09-01 | 贵州利东环保科技有限公司 | Phosphogypsum composite PVC solid wall pipe and manufacturing process thereof |
| CN114716774A (en) * | 2022-05-25 | 2022-07-08 | 麦汉武 | Phosphogypsum stone-plastic base material and preparation method and application thereof |
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