Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eneos Corp
Original Assignee
Nippon Mining Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Mining Co LtdfiledCriticalNippon Mining Co Ltd
Priority to JP15157479ApriorityCriticalpatent/JPS6042169B2/en
Publication of JPS5673630ApublicationCriticalpatent/JPS5673630A/en
Publication of JPS6042169B2publicationCriticalpatent/JPS6042169B2/en
PURPOSE: To efficiently recover arsenic from an arsenic-contg. soln. by carrying out extraction with dialkyl dithiophosphate having alkyl groups of a specified carbon number.
CONSTITUTION: An arsenic-contg. soln. is made acidic with sulfuric acid or the like and brought into contact with an org. solvent contg. dialkyl dithiophosphate having 8W10C alkyl groups as an extracting reagent. The extracting temp. is adjusted to 10W80, especially 20W60°C, and the contact time to 2W30, especially 5W10min. The arsenic extracted soln. is then brought into contact with an alkali soln. to recover the arsenic by back extraction.