Inventors:
- Prairie Village KS, US
Brian V. Yeh - Walnut Creek CA, US
Assignee:
Nowa Technology, Inc. - Prairie Village KS
International Classification:
C05B 17/00
C10L 1/02
C10M 175/00
C07C 67/58
US Classification:
71 12, 554177, 44307, 508111
Abstract:
The method of reclaiming usable products from sludge is disclosed. A predetermined level of solvent within an extractor is heated, below boiling point, and dried sludge is immersed within the headed solvent. The solvent is a non-polar or polar aprotic solvents, such as ethyl acetate. The non-solid products, an oil/solvent mixture, within the sludge are separated and transferred to at least one evaporator with a concentration of between 5-25% oil in the solvent. The oil and solvent are is separated in one or more evaporators to remove approximately 80%-90%, and preferably 70%-95%, of the solvent. The solids are moved to a desolventizer for removal of the residual solvent and are then dried to a moisture content of below 25%, and preferably between 10 to 15%.
