SU859320A1 - Method of purifying cyan-containing and chromium-containing waste water of galvanic industry - Google Patents
Method of purifying cyan-containing and chromium-containing waste water of galvanic industry Download PDFInfo
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- SU859320A1 SU859320A1 SU792798081A SU2798081A SU859320A1 SU 859320 A1 SU859320 A1 SU 859320A1 SU 792798081 A SU792798081 A SU 792798081A SU 2798081 A SU2798081 A SU 2798081A SU 859320 A1 SU859320 A1 SU 859320A1
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- SU
- USSR - Soviet Union
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- chromium
- waste water
- purifying
- cyan
- catalyst
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- Removal Of Specific Substances (AREA)
Description
II
Изобретеиие относитс к очистке сточилх вод, содержапих циаииды и шестивалентный хром, и может быть применено дл очистки сточных вод гальванического производства.The invention relates to the treatment of waste water, cyaide content and hexavalent chromium, and can be applied to the purification of wastewater from electroplating.
Известен способ очистки вод, содержащих цианиды и ионы хрома,, заключающийс в том, что сточную воду обрабатывают серной кислотой, аэрируют с целью отдувки образовавшейс сишльной кислоты, окис л ют синильнук сислоту при 800 с, добавл ют -сульфит натри дл восстановлени шестивалентного хрома до трехвалентного и осаждают трехг валентной хром известью ГОA known method of purifying waters containing cyanides and chromium ions, which consists in treating waste water with sulfuric acid, aerating the resulting acid, removes sulphurous acid, oxidizes blueberry acid at 800 s, adds sodium sulfate to reduce hexavalent chromium to trivalent and precipitated by threeg valent chrome lime GO
Heдocтaткa вl указанного способа вл ютс сложна технологи очистки, состо ща из нескольких ступеней, и большой расход реагентов,The waste of this method is a complex purification process consisting of several steps and a high consumption of reagents,
Известен также способ очистки хром- и циансодержащих сточных вод, в котором цианиды непосредственно окисл ютс шестивапентным хромомThere is also a known method for purifying chromium and cyanogen-containing wastewater, in which cyanides are directly oxidized with six per cent chromium.
в присутствии катализатора - двух валентной меди. В этом способе сточале воды,содержащие хром и цнашды, перемешивают в резервуаре-реакторе вместе с катализатором - медным купоросом. рН раствора поддерживают в пределах 4,0-5,0. После снижени концентращш цианидов в воду ввод т серную кислоту и двуокись серы дл восстаиовлени конов шестивалеитноto го хрома до трехвалентного. Далее смесь нейтрализуют щелочью, в осадок выпадает гидроокись трехвалентного хран и больша часть оксамнда Г2.in the presence of a catalyst - two valence copper. In this method, water containing chromium and chunks is mixed in the tank reactor with a copper sulphate catalyst. The pH of the solution is kept between 4.0 and 5.0. After the cyanide concentrate is reduced, sulfuric acid and sulfur dioxide are introduced into water to reduce the hexavalent chromium to trivalent chromium. The mixture is then neutralized with alkali, trivalent stored hydroxide precipitates and most of the oxamnd G2 precipitates.
1515
Недостатками данного способа вл ютс высока стоимость очистки из-за большого расхода медного купороса и загр знение воды после очистки ионами меди.The disadvantages of this method are the high cost of cleaning due to the high consumption of copper sulphate and water pollution after cleaning with copper ions.
Цель изобретени - сш жение стоимости очистки.The purpose of the invention is to reduce the cost of cleaning.
Поставленна цель достигаетс тем, что в способе очистки цианThe goal is achieved by the fact that in the method of cleaning cyan
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792798081A SU859320A1 (en) | 1979-07-18 | 1979-07-18 | Method of purifying cyan-containing and chromium-containing waste water of galvanic industry |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792798081A SU859320A1 (en) | 1979-07-18 | 1979-07-18 | Method of purifying cyan-containing and chromium-containing waste water of galvanic industry |
Publications (1)
Publication Number | Publication Date |
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SU859320A1 true SU859320A1 (en) | 1981-08-30 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU792798081A SU859320A1 (en) | 1979-07-18 | 1979-07-18 | Method of purifying cyan-containing and chromium-containing waste water of galvanic industry |
Country Status (1)
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SU (1) | SU859320A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5015396A (en) * | 1990-09-11 | 1991-05-14 | The Boc Group, Inc. | Removal of cyanide from aqueous streams |
-
1979
- 1979-07-18 SU SU792798081A patent/SU859320A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5015396A (en) * | 1990-09-11 | 1991-05-14 | The Boc Group, Inc. | Removal of cyanide from aqueous streams |
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