SU1491816A1 - Method of cleaning waste water from hexavalent chromium - Google Patents
Method of cleaning waste water from hexavalent chromium Download PDFInfo
- Publication number
- SU1491816A1 SU1491816A1 SU874241323A SU4241323A SU1491816A1 SU 1491816 A1 SU1491816 A1 SU 1491816A1 SU 874241323 A SU874241323 A SU 874241323A SU 4241323 A SU4241323 A SU 4241323A SU 1491816 A1 SU1491816 A1 SU 1491816A1
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- SU
- USSR - Soviet Union
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- chromium
- waste water
- hexavalent chromium
- cleaning waste
- reducing agent
- Prior art date
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- Treatment Of Water By Oxidation Or Reduction (AREA)
- Removal Of Specific Substances (AREA)
Abstract
Изобретение относитс к области очистки сточных вод от хрома, может быть использовано в химической, металлургической и машиностроительной отрасл х промышленности и позвол ет удешевить процесс при сохранении аналогичной степени очистки. Дл осуществлени способа сточные воды, содержащие хром /1У/ обрабатывают восстановителем-хлоридом серы. После 5-6-минутного перемешивани образующийс осадок отдел ют. В очищенной воде хром не обнаружен.The invention relates to the field of chromium wastewater treatment, can be used in the chemical, metallurgical and engineering industries and allows the process to become cheaper while maintaining a similar degree of purification. For carrying out the process, the waste water containing chromium (IV) is treated with a sulfur chloride reducing agent. After stirring for 5-6 minutes, the precipitate formed is separated. Chromium is not detected in purified water.
Description
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СОWITH
Изобретение относитс к очистке сточных вод от хрома и может быть использовано в химической, металлургической и машиностроительной отрасл х промышленности.This invention relates to the treatment of waste water from chromium and can be used in the chemical, metallurgical and engineering industries.
Целью изобретени вл етс удешевление лроцесса при сохранении аналогичной степени очистки.The aim of the invention is to reduce the process cost while maintaining a similar degree of purification.
П р и м е р. Из 3-суточных проб, вз тьк в объеме 25 л кажда готов т 75 л смешанного раствора состава, мг/л: СГ(, 53; Сг 51, рН 5,2. Хром в растворе представлен в форме 18%, 2%, 80% от общего содержани .PRI me R. From 3-day samples, take in a volume of 25 liters each and prepare 75 liters of a mixed solution of composition, mg / l: SG (, 53; Cr 51, pH 5.2. Chromium in solution is presented in the form of 18%, 2%, 80% of the total.
Методика проведени опытов следующа . Аликвоту раствора 0,5 л помещают в стакан емкостью 1 л, установленный на электромагнитной мешалке . В стакан дозируют расчетную порцию хлорида серы Она составл ет 100120% от стехиометрически необходимого по реакции:Experimental methods are as follows. An aliquot of a 0.5 l solution is placed in a 1 liter beaker mounted on an electromagnetic stirrer. A calculated portion of sulfuric chloride is dispensed into the glass. It is 100,120% of the stoichiometrically required by the reaction:
+3SiiCl5+16H50- 10Сг(ОН)5 + +6NaCl+6Na Cr04+2NaOH или 0,75-0,85 т на 1 т восстанавливаемого хрома. + 3SiiCl5 + 16H50-10Сг (ОН) 5 + + 6NaCl + 6Na Cr04 + 2NaOH or 0.75-0.85 tons per 1 ton of chromium to be reduced.
После 4-6 мин перемешивани отдел ют образующийс осадок, а воду анализируют . В очищенной воде хром не обнаружен.After 4-6 minutes of stirring, the precipitate formed is separated and the water is analyzed. Chromium is not detected in purified water.
Параллельно осуществл ют очистку вод по известному способу с использованием в качестве восстановител сернистого газа. Б очищенной воде хром не обнаружен.In parallel, the purification of water is carried out by a known method using sulfur dioxide gas as a reducing agent. Chromium is not detected in purified water.
Удешевление процесса достигаетс за счет меньшего расхода восстановител - хлорида серы и исключени необходимого приема введени щелочного реагента дл осаждени гидрок- сида хрома.The process is cheaper due to the lower consumption of the reducing agent — sulfur chloride and the exclusion of the necessary administration of the introduction of an alkaline reagent to precipitate chromium hydroxide.
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31А91816431А918164
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU874241323A SU1491816A1 (en) | 1987-03-16 | 1987-03-16 | Method of cleaning waste water from hexavalent chromium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU874241323A SU1491816A1 (en) | 1987-03-16 | 1987-03-16 | Method of cleaning waste water from hexavalent chromium |
Publications (1)
Publication Number | Publication Date |
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SU1491816A1 true SU1491816A1 (en) | 1989-07-07 |
Family
ID=21302828
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU874241323A SU1491816A1 (en) | 1987-03-16 | 1987-03-16 | Method of cleaning waste water from hexavalent chromium |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU1491816A1 (en) |
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1987
- 1987-03-16 SU SU874241323A patent/SU1491816A1/en active
Non-Patent Citations (1)
Title |
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Mracek William, А. Processing chromate wastes in tower blowdown.- Ind. Water Eng. 1969, 6, № 12, 51-53. * |
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