Treatment of waste water from nitrile production
US4246417A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 1978 |
| Grant date | Jan 20, 1981 |
| Priority date | — |
| Expiry date | May 15, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/03
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Waste water recovered from a nitrile production effluent, containing ammonia, hydrogen cyanide, carbon dioxide and water soluble polymers is stripped of ammonia, carbon dioxide and hydrogen cyanide to produce an aqueous stream containing the water soluble polymer. At least a portion of this stream is introduced into a steam scrubber to generate steam therefrom, with scrubber bottoms and any remaining water from the stripping operation being introduced into a reboiler to provide steam for the stripping and an aqueous concentrate of the water soluble polymer. Heat for the reboiler can be provided by indirect heat transfer with steam from the scrubber which produces a condensate suitable as feed water for steam generation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.