FIELD: chemistry.
SUBSTANCE: invention can be used in hydrometallurgical industry, as well as in recycling lewisite group toxic substances at facilities for destroying chemical weapons. Caustic soda and thiourea dioxide in crystalline or solution form are periodically added to an aqueous solution of sodium arsenite or products of lewisite detoxification. The reaction is carried out at temperature between 40 and 80°C. The solution is stirred for 120 minutes. Elementary arsenic is separated from the liquid phase, washed with water and dried.
EFFECT: provision for maximum conversion of arsenic ions to elementary arsenic with minimal loss and reduced amount of toxic wastes, gas emissions and waste water.
10 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF REMOVING ARSENIC (V) COMPOUNDS FROM TECHNOLOGICAL SOLUTIONS | 2013 |
|
RU2574449C2 |
| METHOD OF OBTAINING ELEMENTARY ARSENIC AND SODIUM CHLORIDE FROM PRODUCTS OF ALKALINE HYDROLYSIS OF LEWISITE | 2009 |
|
RU2412734C2 |
| METHOD OF LEWISITE DETOXICATION | 2001 |
|
RU2209103C1 |
| DISPOSAL OF YPERITE, LEWISITE, AND MIXTURES THEREOF | 1992 |
|
RU2071799C1 |
| METHOD FOR CONVERSION OF REACTION MASSES PRODUCED IN ALKALINE HYDROLYSIS OF LEWISITE INTO TECHNICAL PRODUCTS | 2009 |
|
RU2396099C1 |
| METHOD OF REUSING LEWISITE-TYPE SKIN ABSCESS-EFFECT POISON GASES | 1999 |
|
RU2172196C2 |
| METHOD OF UTILIZATION OF TOXIC SUBSTANCES OF THE GROUP LEWISITE, YPERITE AND THEIR MIXTURES | 1994 |
|
RU2073542C1 |
| METHOD FOR REPROCESSING LEWISITE DETOXICATION PRODUCTS | 2001 |
|
RU2198707C1 |
| METHOD FOR OBTAINING ARSENIC ACID FROM HYDROLYZED SODIUM ARSENITE | 2020 |
|
RU2756475C1 |
| METHOD OF PROCESSING HYDROLYSED SODIUM ARSENITE INTO COMMERCIAL PRODUCT | 2012 |
|
RU2513846C1 |
