Compositions – Leather or fur treating
Patent
1976-11-15
1978-07-18
Guynn, Herbert B.
Compositions
Leather or fur treating
166307, 252 855R, E21B 4327
Patent
active
041014260
ABSTRACT:
An acid composition comprising a substantially anhydrous liquid mixture of (1) about 50 to 99 weight percent of polyphosphoric acid having about 5 to 90 weight percent of the total P.sub.2 O.sub.5 present as polymeric P.sub.2 O.sub.5, and (2) about 1 to 25 weight percent of hydrofluoric acid, and in which the H.sub.2 O/P.sub.2 O.sub.5 mole ratio of the overall acid mixture is less than 3.4; and a method for increasing the permeability of siliceous subterranean formations in which the formation is treated with this composition. Also, the composition can optionally contain a catalyst such as a strong mineral acid, a carboxylic acid, an oxidizing agent, or mixtures thereof.
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patent: 2664398 (1953-12-01), Bond
patent: 2742425 (1956-04-01), Holbrook
patent: 3252904 (1966-05-01), Carpenter
patent: 3260569 (1966-07-01), Young
Maly George P.
Young Donald C.
Floyd Gerald L.
Guynn Herbert B.
Hartman Richard C.
Sandford Dean
Union Oil Company of California
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