Catalyst – solid sorbent – or support therefor: product or process – Solid sorbent – Free carbon containing
Patent
1992-02-20
1993-03-09
Konopka, Paul E.
Catalyst, solid sorbent, or support therefor: product or process
Solid sorbent
Free carbon containing
55 68, 55 71, 55 74, 12820527, 423236, 423240S, 502181, 502182, 502183, 502184, 502185, 502406, B01J 2320, B01J 2032, C01B 3108, C01C 300
Patent
active
051927357
ABSTRACT:
Activated charcoal, or ASC whetlerite charcoal for use in providing protection against chemical warfare agents, contains chromium VI, which is a known carcinogen, as well as other metal impregnants. Thus disposal of the charcoal can present problems. The charcoal is usually impregnated with the chromium and other active metals by placing the charcoal in a solution of the metals, and oven drying the charcoal so that crystals are deposited thereon. It has been found that if the charcoal is freeze-dried the quantity of the metals such as chromium VI can be reduced by as much as 50% without compromising the performance of the charcoal.
REFERENCES:
patent: 1519470 (1924-12-01), Wilson
patent: 2537448 (1951-01-01), Engel
patent: 3652214 (1972-03-01), Aboutboul et al.
patent: 4033903 (1977-07-01), Maxwell
patent: 4636485 (1987-01-01), van der Smissen
patent: 4801311 (1989-01-01), Tolles
patent: 4802898 (1989-02-01), Tolles
patent: 5063196 (1991-11-01), Doughty et al.
Liang Septimus H. C.
Pagotto Jack G.
Konopka Paul E.
Minister of National Defence of Her Majesty's Canadian Governmen
LandOfFree
Preparation of low chromium active charcoal by freeze drying imp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Preparation of low chromium active charcoal by freeze drying imp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of low chromium active charcoal by freeze drying imp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-211437