Pressure-swing absorption based cleaning methods and systems

Details Pressure-swing absorption based cleaning methods and systems Pressure-swing absorption based cleaning methods and systems

1996-09-09

1999-03-16

Houtteman, Scott W.

Textiles: fluid treating apparatus

Machines

With gas, steam or mist treating

68 1208, 68 1209, 239136, B08B 304

Patent

active

058815775

ABSTRACT:
The cleaning process according to the present invention includes three main steps including supercritical extraction of soluble contaminants with a solvent composition, subcritical removal of particulate material with agitation, and solvent recovery and recycle. The supercritical extraction of soluble contaminants is performed by pumping a solvent composition into a cleaning vessel containing articles to be cleaned and pressurizing and heating the fluid in the vessel to a supercritical state. Then the subcritical phase is begun to remove particulate material from the articles by reducing the pressure and temperature of the solvent composition in the cleaning vessel to a subcritical state and reforming the liquid/gas interface. Agitation of the articles in the cleaning vessel is provided by recirculation of the solvent composition or by motion of a mechanical device within the cleaning vessel. Due to a density difference between gas and liquid in the subcritical phase, the degree of agitation and resultant particulate removal is maximized. The solvent composition recovery step preferably includes further depressurization of the fluid to separate and remove soluble and insoluble contaminants from the fluid, allowing this solvent composition to be reused. The system may be operated with any gas with suitable solvent properties such as carbon dioxide, carbon dioxide based mixtures, or other known solvents.

REFERENCES:
patent: 2985003 (1961-05-01), Gelfand et al.
patent: 3086538 (1963-04-01), Voltz
patent: 3712085 (1973-01-01), Guberman et al.
patent: 4012194 (1977-03-01), Maffei
patent: 4199482 (1980-04-01), Renaud et al.
patent: 4336024 (1982-06-01), Denissenko et al.
patent: 4630625 (1986-12-01), Capella et al.
patent: 4727734 (1988-03-01), Kanazawa et al.
patent: 4824487 (1989-04-01), Heffernan
patent: 4936922 (1990-06-01), Cherry
patent: 5013366 (1991-05-01), Jackson et al.
patent: 5017423 (1991-05-01), Bossmann et al.
patent: 5032148 (1991-07-01), Baker et al.
patent: 5035921 (1991-07-01), Berneburg et al.
patent: 5064280 (1991-11-01), Ringens et al.
patent: 5068040 (1991-11-01), Jackson
patent: 5080822 (1992-01-01), Van Eenam
patent: 5080831 (1992-01-01), VanEenam
patent: 5158100 (1992-10-01), Tanaka et al.
patent: 5196134 (1993-03-01), Jackson
patent: 5213619 (1993-05-01), Jackson et al.
patent: 5215592 (1993-06-01), Jackson
patent: 5226969 (1993-07-01), Watanabe et al.
patent: 5236602 (1993-08-01), Jackson
patent: 5248588 (1993-09-01), Winston
patent: 5250078 (1993-10-01), Saus et al.
patent: 5267455 (1993-12-01), Dewees et al.
patent: 5269850 (1993-12-01), Jackson
patent: 5279615 (1994-01-01), Mitchell et al.
patent: 5306350 (1994-04-01), Hoy et al.
patent: 5313965 (1994-05-01), Palen
patent: 5316591 (1994-05-01), Chao et al.
patent: 5344493 (1994-09-01), Jackson
patent: 5368171 (1994-11-01), Jackson
patent: 5370742 (1994-12-01), Mitchell et al.
patent: 5374337 (1994-12-01), Ng et al.
patent: 5403621 (1995-04-01), Jackson et al.
patent: 5412958 (1995-05-01), Iliff et al.
patent: 5467492 (1995-11-01), Chao et al.
patent: 5482211 (1996-01-01), Chao et al.
patent: 5486212 (1996-01-01), Mitchell et al.
patent: 5514220 (1996-05-01), Wetmore et al.
Harvey Black, A Cleaner Bill of Health, Environmental Health Perspectives, May 1996, (3 pgs. Total).

Affiliated with

Also associated with

Rating

Pressure-swing absorption based cleaning methods and systems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pressure-swing absorption based cleaning methods and systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure-swing absorption based cleaning methods and systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-808315