CN102730721A - Recovering method of by-product sodium chloride in polyphenylene sulfide production - Google Patents
Recovering method of by-product sodium chloride in polyphenylene sulfide production Download PDFInfo
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- CN102730721A CN102730721A CN2012101896224A CN201210189622A CN102730721A CN 102730721 A CN102730721 A CN 102730721A CN 2012101896224 A CN2012101896224 A CN 2012101896224A CN 201210189622 A CN201210189622 A CN 201210189622A CN 102730721 A CN102730721 A CN 102730721A
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- sodium chloride
- chlor
- sodium
- polyphenylene sulfide
- aqueous solution
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Abstract
The invention discloses a recovering method of a by-product sodium chloride in polyphenylene sulfide production. The method comprises the steps that: (1) impurities are removed by absorption, wherein a water solution containing sodium chloride is added into a collection tank and is stirred and mixed, a temperature is controlled at 55-65 DEG C, active carbon is added, the mixture is well mixed by stirring, and absorption is carried out for 25-35min; (2) solid-liquid separation is carried out, wherein the mixed liquid obtained in the step (1) is filtered, and active carbon and sodium chloride aqueous solution are obtained by separation; and (3) concentration and crystallization are carried out, wherein the sodium chloride aqueous solution obtained in the step (2) is injected into a multi-effect distillation system for concentration, solid-liquid separation is carried out after sodium chloride is precipitated, and sodium chloride crystals are obtained. In the above method, the active carbon used for absorption can be recovered and repeatedly used, such that resource is not wasted. Multi-effect distillation is adopted, such that energy consumption can be greatly reduced. The appearance and content of the recovered sodium chloride satisfy industrial sodium chloride standards, and provide a certain economic benefits. Further, adverse influences of sodium chloride to the environment can be avoided.
Description
Technical field
The present invention relates to the polyphenylene sulfide production field of (being called for short PPS), refer more particularly to the recovery method of by product sodium-chlor in the polyphenylene sulfide suitability for industrialized production.
Background technology
In the polyphenylene sulfide suitability for industrialized production, producing by product sodium-chlor, at present domesticly how by product sodium-chlor is handled with Study on Separation less, generally all is that by product sodium-chlor is worked as waste treatment.
The shortcoming that the treatment process of above-mentioned by product sodium-chlor exists is: restricted the industrialization development of polyphenylene sulfide, and environment is caused very big disadvantageous effect.
Summary of the invention
The purpose of this invention is to provide a kind of polyphenylene sulfide that can isolate sodium-chlor effectively produce in the recovery method of by product sodium-chlor.
For realizing above-mentioned purpose, the present invention has adopted following technical scheme.
The recovery method of by product sodium-chlor during described polyphenylene sulfide is produced; May further comprise the steps: the ⑴ adsorption-edulcoration, the aqueous solution that will contain sodium-chlor is put into collecting tank and is mixed, and temperature is controlled at 55 ℃～65 ℃; Add the gac mixing and stirring, adsorbed 25 minutes～35 minutes; ⑵ solid-liquid separation with the mixed solution filtration of step ⑴, is isolated gac and sodium chloride aqueous solution; ⑶ condensing crystal injects multi-effect distillation system with the isolated sodium chloride aqueous solution of step ⑵ and concentrates, and solid-liquid separation obtains sodium chloride crystal to treat to separate out afterwards by sodium-chlor.
Further, the recovery method of by product sodium-chlor during aforesaid polyphenylene sulfide is produced, wherein, the dosage of said gac is 0.6～1.0% of a weight sodium chloride.In actual production, weight sodium chloride can draw through online analytical instrument.
Further, the recovery method of by product sodium-chlor during aforesaid polyphenylene sulfide is produced, wherein, isolated gac is reused through regeneration.
The invention has the beneficial effects as follows: the gac repeated use of can regenerating of absorption usefulness, do not waste resource; Adopt multi-effect distilling to cut down the consumption of energy greatly; All meet the standard of industrial sodium-chlor on the sodium-chlor outward appearance that reclaims, the content, have certain economic benefits; And can avoid sodium-chlor that environment is caused disadvantageous effect.
Embodiment
Be further described below in conjunction with the recovery method of preferred embodiment by product sodium-chlor in the polyphenylene sulfide production of the present invention.
The recovery method of by product sodium-chlor during embodiment one, polyphenylene sulfide are produced may further comprise the steps: the ⑴ adsorption-edulcoration, sodium chloride aqueous solution is squeezed into a 30m
3Collecting tank mixes, and temperature is controlled at 55 ℃, presses 0.6% of weight sodium chloride and adds the gac mixing and stirring, adsorbs 30 minutes; Wherein, weight sodium chloride can draw through online analytical instrument.⑵ solid-liquid separation is filtered the mixed solution of step ⑴ through strainer, isolate gac and sodium chloride aqueous solution, and isolated gac is reused through regeneration; ⑶ condensing crystal injects multi-effect distillation system with the isolated sodium chloride aqueous solution of step ⑵ and concentrates, treat that sodium-chlor is separated out after; When the solid sodium chloride content in the aqueous solution reaches 10% left and right sides; Through the continuous solid-liquid separation of whizzer, obtain sodium chloride crystal, then dry packing.
The recovery method of by product sodium-chlor during embodiment two, polyphenylene sulfide are produced may further comprise the steps: the ⑴ adsorption-edulcoration, sodium chloride aqueous solution is squeezed into a 30m
3Collecting tank mixes, and temperature is controlled at 60 ℃, presses 0.8% of weight sodium chloride and adds the gac mixing and stirring, adsorbs 25 minutes; Wherein, weight sodium chloride can draw through online analytical instrument.⑵ solid-liquid separation is filtered the mixed solution of step ⑴ through strainer, isolate gac and sodium chloride aqueous solution, and isolated gac is reused through regeneration; ⑶ condensing crystal injects multi-effect distillation system with the isolated sodium chloride aqueous solution of step ⑵ and concentrates, treat that sodium-chlor is separated out after; When the solid sodium chloride content in the aqueous solution reaches 10% left and right sides; Through the continuous solid-liquid separation of whizzer, obtain sodium chloride crystal, then dry packing.
The recovery method of by product sodium-chlor during embodiment three, polyphenylene sulfide are produced may further comprise the steps: the ⑴ adsorption-edulcoration, sodium chloride aqueous solution is squeezed into a 30m
3Collecting tank mixes, and temperature is controlled at 65 ℃, presses 1.0% of weight sodium chloride and adds the gac mixing and stirring, adsorbs 35 minutes; Wherein, weight sodium chloride can draw through online analytical instrument.⑵ solid-liquid separation is filtered the mixed solution of step ⑴ through strainer, isolate gac and sodium chloride aqueous solution, and isolated gac is reused through regeneration; ⑶ condensing crystal injects multi-effect distillation system with the isolated sodium chloride aqueous solution of step ⑵ and concentrates, treat that sodium-chlor is separated out after; When the solid sodium chloride content in the aqueous solution reaches 10% left and right sides; Through the continuous solid-liquid separation of whizzer, obtain sodium chloride crystal, then dry packing.
Through detecting, each item index of resulting sodium-chlor all meets the standard of industrial sodium-chlor among above-mentioned each embodiment, and concrete each item index is seen table 1.
Table 1
| Index | Analytical results |
| Sodium-chlor | ≥95% |
| Moisture content | ≤3% |
| Water-insoluble | ≤0.2% |
| Calcium ions and magnesium ions | ≤0.4% |
| Sulfate ion | ≤0.8% |
Claims (3)
1. the recovery method of by product sodium-chlor during polyphenylene sulfide is produced; It is characterized in that: may further comprise the steps: the ⑴ adsorption-edulcoration, the aqueous solution that will contain sodium-chlor is put into collecting tank and is mixed, and temperature is controlled at 55 ℃～65 ℃; Add the gac mixing and stirring, adsorbed 25 minutes～35 minutes; ⑵ solid-liquid separation with the mixed solution filtration of step ⑴, is isolated gac and sodium chloride aqueous solution; ⑶ condensing crystal injects multi-effect distillation system with the isolated sodium chloride aqueous solution of step ⑵ and concentrates, and solid-liquid separation obtains sodium chloride crystal to treat to separate out afterwards by sodium-chlor.
2. the recovery method of by product sodium-chlor during polyphenylene sulfide according to claim 1 is produced, it is characterized in that: the dosage of said gac is 0.6～1.0% of a weight sodium chloride.
3. the recovery method of by product sodium-chlor during polyphenylene sulfide according to claim 1 and 2 is produced is characterized in that: isolated gac is reused through regeneration.
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| CN201210189622.4A CN102730721B (en) | 2012-06-11 | 2012-06-11 | Recovering method of by-product sodium chloride in polyphenylene sulfide production |
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| CN201210189622.4A CN102730721B (en) | 2012-06-11 | 2012-06-11 | Recovering method of by-product sodium chloride in polyphenylene sulfide production |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085905A (en) * | 2014-07-18 | 2014-10-08 | 安徽佳先功能助剂股份有限公司 | Method for purifying sodium chloride as by-product in production of dibenzoyl methane |
| CN104277220A (en) * | 2014-09-24 | 2015-01-14 | 中国石油化工股份有限公司 | Method for removing salts out of polyphenyl thioether recovery solvent |
| CN104609442A (en) * | 2015-01-15 | 2015-05-13 | 浙江工商大学 | Method for recycling waste residues produced by synthesis of TAIC (triallyl isocyanurate) |
| CN105293531A (en) * | 2015-11-26 | 2016-02-03 | 山东潍坊润丰化工股份有限公司 | Byproduct industrial salt refined processing method |
| CN106565956A (en) * | 2016-10-21 | 2017-04-19 | 天津科技大学 | Method for comprehensive recycling of by-product slurry in polyphenylene sulfide productive process |
| CN106565581A (en) * | 2016-10-21 | 2017-04-19 | 天津科技大学 | A method for comprehensive recovery and utilization of lithium containing mixed salts in a polyphenylene sulfide production process |
| CN110105573A (en) * | 2019-05-21 | 2019-08-09 | 中国石油化工股份有限公司 | A method of reducing polyphenylene sulfide by-product salt COD |
| CN113620317A (en) * | 2021-06-24 | 2021-11-09 | 安徽佳先功能助剂股份有限公司 | Treatment process of dibenzoyl methane production waste |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085905A (en) * | 2014-07-18 | 2014-10-08 | 安徽佳先功能助剂股份有限公司 | Method for purifying sodium chloride as by-product in production of dibenzoyl methane |
| CN104277220A (en) * | 2014-09-24 | 2015-01-14 | 中国石油化工股份有限公司 | Method for removing salts out of polyphenyl thioether recovery solvent |
| CN104609442A (en) * | 2015-01-15 | 2015-05-13 | 浙江工商大学 | Method for recycling waste residues produced by synthesis of TAIC (triallyl isocyanurate) |
| CN105293531A (en) * | 2015-11-26 | 2016-02-03 | 山东潍坊润丰化工股份有限公司 | Byproduct industrial salt refined processing method |
| CN106565956A (en) * | 2016-10-21 | 2017-04-19 | 天津科技大学 | Method for comprehensive recycling of by-product slurry in polyphenylene sulfide productive process |
| CN106565581A (en) * | 2016-10-21 | 2017-04-19 | 天津科技大学 | A method for comprehensive recovery and utilization of lithium containing mixed salts in a polyphenylene sulfide production process |
| CN106565956B (en) * | 2016-10-21 | 2018-09-28 | 天津科技大学 | By-product slurry comprehensive reutilization method in a kind of polyphenylene sulfide production process |
| CN106565581B (en) * | 2016-10-21 | 2019-07-12 | 天津科技大学 | The comprehensive reutilization method of mixed salt containing lithium in a kind of polyphenylene sulfide production process |
| CN110105573A (en) * | 2019-05-21 | 2019-08-09 | 中国石油化工股份有限公司 | A method of reducing polyphenylene sulfide by-product salt COD |
| CN110105573B (en) * | 2019-05-21 | 2022-03-08 | 中国石油化工股份有限公司 | Method for reducing COD (chemical oxygen demand) of polyphenylene sulfide byproduct salt |
| CN113620317A (en) * | 2021-06-24 | 2021-11-09 | 安徽佳先功能助剂股份有限公司 | Treatment process of dibenzoyl methane production waste |
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| CN102730721B (en) | 2014-07-30 |
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Effective date of registration: 20200710 Address after: 215600 Donglai Jiangqiao, Yangshe Town, Zhangjiagang City, Jiangsu Province (in Zhangjiagang East China Marine Valve Manufacturing Co., Ltd.) Patentee after: Jiangsu Xinren Environmental Protection Technology Co.,Ltd. Address before: 215621, Zhangjiagang, Jiangsu, Suzhou Province Yu Yu Town Chemical Industry Park, Zhangjiagang Xin Sheng new materials Co., Ltd. Patentee before: ZHANGJIAGANG XINSHENG NEW MATERIAL Co.,Ltd. |
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