Defoamer and processing aid for wet process phosphoric acid
AssigneeNational Distillers and Chemical Corporation
InventorsEugene F. McCaffrey, Alfred J. Dieterman, Luba Knazko
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Abstract
A defoamer composition comprising a mixture of defoaming effective amounts of monocarboxylic acid having from 12 to 26 carbon atoms, a monoalkanolamide, and an alcohol selected from the group consisting of primary linear aliphatic alcohols ranging from C.sub.4 to C.sub.20, primary branch aliphatic alcohols ranging from C.sub.4 to C.sub.20, and secondary alcohols ranging from C.sub.6 to C.sub.12 ; and a method of inhibiting foaming in a phosphate rock and sulfuric acid medium employed in the synthesis of phosphoric acid by the "wet process" manufacture of phosphoric acid which comprises adding to the reaction medium an effective amount of the above described defoamer composition.
Claims13
A defoamer composition comprising a mixture of defoaming effective amounts of:
- (a) a monocarboxylic acid having from 12 to 26 carbon atoms and melting points below about 20.degree. C.;
- (b) a monoalkanolamide, wherein said monoalkanolamide is derived from a monocarboxylic acid having from 12 to 26 carbon atoms and melting point below about 20.degree. C. and a monoalkanolamine;
- and
- (c) an alcohol selected from the group consisting of primary linear aliphatic alcohols ranging from C.sub.4 to C.sub.20, primary branched aliphatic alcohols ranging from C.sub.4 to C.sub.20, and secondary alcohols ranging from C.sub.6 to C.sub.12, wherein the proportion in weight percent of the components (a), (b) and (c) are:
- 50 to 95 weight percent of (a);
- 5 to 45 weight percent of (b);
- and
- 0.25 to 20 weight percent of (c).
A method of inhibiting foaming in a phosphate rock and sulfuric acid medium employed in the synthesis of phosphoric acid which comprises adding to the reaction medium an effective amount of a defoamer composition comprising a mixture of:
- (a) 50 to 95 weight percent of a monocarboxylic acid from 12 to 26 carbon atoms and a melting point below about 20.degree. C.;
- (b) 5 to 45 weight percent of a monoalkanolamide, wherein said monoalkanolamide is derived from a monocarboxylic acid having from 12 to 26 carbon atoms and a melting point below about 20.degree. C. and a monoalkanolamine;
- and
- (c) 0.25 to 20 weight percent of an alcohol selected from the group consisting of primary linear aliphatic alcohols ranging from C.sub.4 to C.sub.20, primary branched aliphatic alcohols ranging from C.sub.4 to C.sub.20, and secondary alcohols ranging from C.sub.6 to C.sub.12.
Dependencies are inferred from the claim text.