Invention Grant
- Patent Title: Cleaning process utilizing an organic solvent and a pressurized fluid solvent
- Patent Title (中): 使用有机溶剂和加压流体溶剂的清洁方法
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Application No.: US11947704Application Date: 2007-11-29
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Publication No.: US07566347B2Publication Date: 2009-07-28
- Inventor: Timothy L. Racette , Gene R. Damaso , James E. Schulte
- Applicant: Timothy L. Racette , Gene R. Damaso , James E. Schulte
- Applicant Address: US IL Naperville
- Assignee: Eminent Technologies LLC
- Current Assignee: Eminent Technologies LLC
- Current Assignee Address: US IL Naperville
- Agency: K&L Gates LLP
- Main IPC: D06L1/02
- IPC: D06L1/02 ; D06L1/04 ; D06L1/08

Abstract:
A cleaning method and system that utilize an organic cleaning solvent and pressurized fluid solvent is disclosed. The method and system have no conventional evaporative hot air drying cycle. Instead, the method and system utilize the solubility of the organic solvent in pressurized fluid solvent as well as the physical properties of pressurized fluid solvent. After an organic solvent cleaning cycle, the solvent is extracted from the textiles at high speed in a rotating drum in the same way conventional solvents are extracted from textiles in conventional evaporative hot air dry cleaning machines. Instead of proceeding to a conventional drying cycle, the extracted textiles are then immersed in pressurized fluid solvent to extract the residual organic solvent from the textiles. This is possible because the organic solvent is soluble in pressurized fluid solvent. After the textiles are immersed in pressurized fluid solvent, pressurized fluid solvent is pumped from the drum. Finally, the drum is de-pressurized to atmospheric pressure to evaporate any remaining pressurized fluid solvent, yielding clean, solvent free textiles. The organic solvent is preferably dipropylene glycol n-butyl ether, tripropylene glycol n-butyl ether or tripropylene glycol methyl ether, a mixture thereof, or a similar solvent and the pressurized fluid solvent is preferably densified carbon dioxide.
Public/Granted literature
- US20080127427A1 Cleaning System Utilizing an Organic Solvent and a Pressurized Fluid Solvent Public/Granted day:2008-06-05
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