Method of filtering

Details Method of filtering Method of filtering

1983-10-27

1985-04-09

Wyse, Thomas

Liquid purification or separation

Processes

Separating

210777, 210784, B01D 3702

Patent

active

045100616

ABSTRACT:
This invention provides a non-fibrous combustible filter aid for vacuum pre-coat filter units which is effective to maintain a filter bed coating on rotary filter drums just sufficiently porous to pass the liquid of a slurry while retaining the slurry solids thereon and is capable of being scraped off the bed in thin film form with the slurry solids thereon. The filter aid comprises relatively non-compressible non-fibrous granular charcoal or nut shell particles having a dry bulk density from about 0.3 to about 0.6 grams per cubic centimeter, a particle density of about 1.4 to 1.7 grams per cubic centimeter and a particle size range of 30 to 125 microns. The filter aid of this invention is capable of being burned with the solids deposited thereon to recover the heat value thereof or to dispose of the solids, is free from silicates or other non-combustible ingredients, and is devoid of fibers which will interfere with the proper operation of the filter unit.

REFERENCES:
patent: 3279603 (1966-10-01), Busse
patent: 3486621 (1969-12-01), Hirs
patent: 3635341 (1972-01-01), Davis
patent: 3780861 (1973-12-01), Hirs
patent: 3870632 (1975-03-01), Erskine
patent: 3900395 (1975-08-01), Hirs
patent: 4046690 (1977-09-01), Rodgers et al.
patent: 4197205 (1980-04-01), Hirs
patent: 4238334 (1980-12-01), Halbfoster
patent: 4315824 (1982-02-01), Karolkiewicz et al.
Johns-Manville, "Celite Filter Aids", Brochure FA-84A-RWC.
Eagle-Picher Celatom, "Diatomite Filter Aids", Brochure A-500.
Grefco, Inc., "Diacalite Perlite Filter Aid", Technical Bulletin P-11-E.
Eagle Picher, "Pre-co-Floc", Cellulose Fiber Filter Aids Provide Superior Performance, Bulletin, Form C-100.
Johns-Manville, "Celite", Technical Data Sheet FF-238A.

Affiliated with

Also associated with

Rating

Method of filtering does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of filtering, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of filtering will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1168494