Assignors: KOHLHAUPT, REINHOLD, LANG, ERNST, BIEG, WALTER Application granted granted Critical Publication of US5116996A publication Critical patent/US5116996A/en Assigned to DYSTAR TEXTILFARBEN GMBH & CO. 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 BASF SE filed Critical BASF SE Priority to US07/731,657 priority Critical patent/US5116996A/en Assigned to BASF AKTIENGESELLSCHAFT reassignment BASF AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST. Original Assignee BASF SE 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 or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US07/731,657 Inventor Reinhold Kohlhaupt Walter Bieg Ernst Lang Current Assignee (The listed assignees may be inaccurate.
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Google Patents US5116996A - Purification of indigoĭownload PDF Info Publication number US5116996A US5116996A US07/731,657 US73165791A US5116996A US 5116996 A US5116996 A US 5116996A US 73165791 A US73165791 A US 73165791A US 5116996 A US5116996 A US 5116996A Authority US United States Prior art keywords solution indigo indoxylate stripping indoxylate solution Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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