Compositions – Leather or fur treating
Patent
1974-02-25
1978-04-04
Lechert, Jr., Stephen J.
Compositions
Leather or fur treating
423317, 252 1, 426807, C09K 700
Patent
active
040826775
ABSTRACT:
A new dry phosphoric acid product and the process for making it are disclosed. The product is a dry finely divided, brown or black, charcoal-like, extremely hygroscopic powder having an effective phosphoric acid content of up to about 122.4% by weight (based on a 75% aqueous solution) a phosphorus content of up to about 29% by weight; and a moisture content usually less than 10% by weight, typically 3 to 8%. The product is useful as a source of phosphoric acid, and in combination, it produces a new animal feed ingredient material, a new drilling mud additive, and other novel products. The process comprises first mixing a phosphoric acid solution, such as 75 or 85% by weight phosphoric acid solutions of commercial grade, with a dry, relatively fine absorbent material, preferably an organic absorbent material such as peanut hulls, rice hulls, beet pulp or other inexpensive organic by-products, and then drying the mixture in conventional drying equipment, preferably at temperatures from 150.degree. to 200.degree. C. When organic absorbent carriers are used, the phosphoric acid and the heat of drying oxidize and dehydrate the organic materials so that the resultant dried product containing the dried phosphoric acid has the powdered, burnt or charcoal-like appearance.
REFERENCES:
patent: 2379100 (1945-06-01), Partridge
patent: 3048471 (1962-08-01), Shaver
Moore Edward W.
Zollar Leland H.
Harvest Industries, Inc.
Lechert Jr. Stephen J.
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