SU893879A1 - Method of waste water purification from phenylhydrazine - Google Patents
Method of waste water purification from phenylhydrazine Download PDFInfo
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- SU893879A1 SU893879A1 SU802906984A SU2906984A SU893879A1 SU 893879 A1 SU893879 A1 SU 893879A1 SU 802906984 A SU802906984 A SU 802906984A SU 2906984 A SU2906984 A SU 2906984A SU 893879 A1 SU893879 A1 SU 893879A1
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- SU
- USSR - Soviet Union
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- phenylhydrazine
- wastewater
- waste water
- water purification
- chloroform
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- Removal Of Specific Substances (AREA)
Description
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Изобретение относитс к способам очистки сточных вод от фенилгидразина и может быть использовано дл очистки сточных вод производства феНИЛгидразина .This invention relates to methods for treating wastewater from phenylhydrazine and can be used to purify wastewater from the production of phenylhydrazine.
В производстве сол нокислого фенилгидразина образуютс сточные воды с содержанием целевого продукта около 10 г/л. Фенилгидразин трудно Q поддаетс биологической о--1ксткц и вл етс токсичным дл активного ила. Известен способ очистки сточных вод от фенилгидразина химическим реагентом - гипохлоритом .натри при рН 9-10 и 50-60°С 1.In the production of phenylhydrazine hydrochloride, wastewater is formed with a content of the target product of about 10 g / l. Phenylhydrazine is difficult to give Q biological bioassay and is toxic to activated sludge. A known method of purification of wastewater from phenylhydrazine chemical reagent - hypochlorite. Sodium at pH 9-10 and 50-60 ° C 1.
Однако очистка обработкой гипохлоритом натри не нашла промышленного применени из-за высокой стоимости. Наиболее близким к предлагаемому по технической сущности вл етс спо- 20 соб очистки сточных вод производства фенилгидразина, заключак дийс в обработке сточных вод метилэтилкетоном при 90-105°С и мол рном соотношении метилзтилкетона к фенилгидразину, равном (0,8-1,5):(1-1,2). Полученный осадок 2,3-диметилиндола выдел ют фильтрованием и очищенные сточные воды после двукратного разбавлени направл ют на биологическую доочистку.ЗОHowever, cleaning with sodium hypochlorite treatment did not find industrial use due to its high cost. The closest to the proposed technical essence is the method of wastewater treatment for the production of phenylhydrazine, concluded in the treatment of wastewater with methyl ethyl ketone at 90-105 ° C and the molar ratio of methylztilketone to phenylhydrazine equal to (0.8-1.5) : (1-1,2). The resulting precipitate of 2,3-dimethylindole is isolated by filtration and the purified wastewater, after two-fold dilution, is sent for biological purification.
Степень очистки сточных вод составл ет 96-100% 21.The degree of wastewater treatment is 96-100% 21.
Недостатком способа вл етс то, что используемлй при очистке метилэтилкетон вл етс дорогим реагентом , что делает способ дорогим, а получаемый 2,3-диметилиндол не может быть использован потребителем и вл етс отходом.The disadvantage of the method is that the methyl ethyl ketone used in the purification is an expensive reagent, which makes the method expensive, and the resulting 2,3-dimethylindole cannot be used by the consumer and is a waste.
Цель изобретени - обеспечение возможности вьщелени фенилгидразина в качестве товарного продукта.The purpose of the invention is to enable phenylhydrazine to be marketed as a marketable product.
Поставленна цель достигаетс тем, что обработку воды ведут экстракцией, фенилгидразина хлороформом при рН 8,5-9,S и соотношении объемов сточных вод к хлороформу, равном 10: :3-4.The goal is achieved by the fact that water treatment is carried out by extraction with chloroform phenylhydrazine at pH 8.5-9, S and the ratio of wastewater to chloroform is 10: 3-4.
Значение рН 8,5-9,5 вл етс оптимальным . При рН ниже 8,5 коэффициент экстракции снижаетс , а экстракци при рН выше 9,5 нежелательна, так как перед подачей на биохимочистку стоки требуетс дополнительно ней трализовать. Предпочтительно экстракцию вести при соотношении хлороформ: сточна вода 3-4;10. При уменьшении количества хлороформа извлечение фенилгидразина из сточных вод протекает недостаточно полно, увеличениеA pH of 8.5-9.5 is optimal. At pH below 8.5, the extraction rate decreases, and extraction at a pH above 9.5 is undesirable, since it is necessary to neutralize the effluent before feeding to biochemical purification. Preferably the extraction is carried out at a ratio of chloroform: waste water 3-4; 10. With a decrease in the amount of chloroform, the extraction of phenylhydrazine from wastewater does not fully proceed,
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU802906984A SU893879A1 (en) | 1980-01-03 | 1980-01-03 | Method of waste water purification from phenylhydrazine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU802906984A SU893879A1 (en) | 1980-01-03 | 1980-01-03 | Method of waste water purification from phenylhydrazine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU893879A1 true SU893879A1 (en) | 1981-12-30 |
Family
ID=20888400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU802906984A SU893879A1 (en) | 1980-01-03 | 1980-01-03 | Method of waste water purification from phenylhydrazine |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU893879A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108083536A (en) * | 2017-12-21 | 2018-05-29 | 曲阜师范大学 | A kind of phenylhydrazine hydrochloride production method for treating waste liquid and application |
| CN108585335A (en) * | 2018-05-18 | 2018-09-28 | 曲阜师范大学 | A kind of phenylhydrazine hydrochloride production liquid waste processing and recovery method as resource |
-
1980
- 1980-01-03 SU SU802906984A patent/SU893879A1/en active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108083536A (en) * | 2017-12-21 | 2018-05-29 | 曲阜师范大学 | A kind of phenylhydrazine hydrochloride production method for treating waste liquid and application |
| CN108585335A (en) * | 2018-05-18 | 2018-09-28 | 曲阜师范大学 | A kind of phenylhydrazine hydrochloride production liquid waste processing and recovery method as resource |
| CN108585335B (en) * | 2018-05-18 | 2021-07-27 | 曲阜师范大学 | A kind of phenylhydrazine hydrochloride production waste liquid treatment and resource recovery method |
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