US4230599A — Process for inhibiting foaming utilizing maleic e…

Claim 1

Independent Claim 158 words

A process for inhibiting foaming in a liquid system containing water comprising adding thereto an effective foam inhibiting amount of a defoamer composition consisting of a mineral oil and about 5 to about 50 percent by weight based upon the total weight of said composition of a mineral oil-soluble polymer of the formula: ##STR10## wherein X equals hydrogen, alkyl of 1 to about 30 carbon atoms, phenyl, OR', ##STR11## wherein R' is hydrogen or alkyl of 1 to about 30 carbon atoms, R" is alkyl of 1 to about 30 carbon atoms; R is hydrogen or substituted or unsubstituted alkyl or alkyl ethers of about 8 to about 30 carbon atoms wherein at least one R is said alkyl, y is an integer of 1-5, and the sum of m and n are such that the polymer has a molecular weight of about 1000 to 100,000; the molar ratio of m:n being respectively about 50:50 to about 100:0.

Claim 2

Dependent Claim 158 words

A process for inhibiting foaming in a liquid system containing water comprising adding thereto an effective foam inhibiting amount of a defoamer composition consisting of a mineral oil and about 5 to about 50 percent by weight based upon the total weight of said composition of a mineral oil-soluble polymer of the formula: ##STR10## wherein X equals hydrogen, alkyl of 1 to about 30 carbon atoms, phenyl, OR', ##STR11## wherein R' is hydrogen or alkyl of 1 to about 30 carbon atoms, R" is alkyl of 1 to about 30 carbon atoms; R is hydrogen or substituted or unsubstituted alkyl or alkyl ethers of about 8 to about 30 carbon atoms wherein at least one R is said alkyl, y is an integer of 1-5, and the sum of m and n are such that the polymer has a molecular weight of about 1000 to 100,000; the molar ratio of m:n being respectively about 50:50 to about 100:0.

Claim 3

Dependent Claim 169 words

A process for inhibiting foaming in a liquid system containing water comprising adding thereto an effective foam inhibiting amount of a defoamer composition consisting of an effective amount of a surfactant to impart water dispersibility thereto, a mineral oil, and about 5 to about 50 percent by weight based upon the total weight of said composition of a mineral oil-soluble polymer of the formula: ##STR12## wherein X equals hydrogen, alkyl of 1 to about 30 carbon atoms, phenyl, OR', ##STR13## wherein R' is hydrogen or alkyl of 1 to about 30 carbon atoms, R" is alkyl of 1 to about 30 carbon atoms; R is hydrogen or substituted or unsubstituted alkyl or alkyl ethers of about 8 to about 30 carbon atoms wherein at least one R is said alkyl, y is an integer of 1-5, and the sum of m and n are such that the polymer has a molecular weight of about 1000 to 100,000; the molar ratio of m:n being respectively about 50:50 to about 100:0.

Claim 4

Dependent Claim 169 words

A process for inhibiting foaming in a liquid system containing water comprising adding thereto an effective foam inhibiting amount of a defoamer composition consisting of an effective amount of a surfactant to impart water dispersibility thereto, a mineral oil, and about 5 to about 50 percent by weight based upon the total weight of said composition of a mineral oil-soluble polymer of the formula: ##STR12## wherein X equals hydrogen, alkyl of 1 to about 30 carbon atoms, phenyl, OR', ##STR13## wherein R' is hydrogen or alkyl of 1 to about 30 carbon atoms, R" is alkyl of 1 to about 30 carbon atoms; R is hydrogen or substituted or unsubstituted alkyl or alkyl ethers of about 8 to about 30 carbon atoms wherein at least one R is said alkyl, y is an integer of 1-5, and the sum of m and n are such that the polymer has a molecular weight of about 1000 to 100,000; the molar ratio of m:n being respectively about 50:50 to about 100:0.

Claim 5

Dependent Claim 31 words

The process of claim 2 wherein said surfactant is present in the proportion of about 1 to about 20 percent by weight based upon the total weight of said defoamer composition.

Claim 6

Dependent Claim 36 words

The process of claim 3 wherein said surfactant is selected from the group consisting of at least one of the alkali metal stearates and polyoxyalkylene glycols having a molecular weight of about 100 to about 5000.

Claim 7

Dependent Claim 44 words

The process of claim 3 wherein said polymer is a half alkyl ester derived from the reaction of a mixture of a maleic compound and a monoethylenically unsaturated monomer copolymerizable therewith, said mixture containing one mole of said monomer per mole of maleic compound.

Claim 8

Dependent Claim 19 words

The process of claim 5 wherein said monoethylenically unsaturated monomer is styrene and said maleic compound is maleic anhydride.

Claim 9

Dependent Claim 20 words

The process of claim 5 wherein said monoethylenically unsaturated monomer is methylvinyl ether and said maleic compound is maleic anhydride.

Claim 10

Dependent Claim 26 words

The process of claim 7 wherein R is alkyl of about 18 to about 25 carbon atoms and said liquid system is pulp mill black liquor.

Claim 11

Dependent Claim 19 words

The process of claim 5 wherein said monoethylenically unsaturated monomer is octadecene and said maleic compound is maleic anhydride.

Claim 12

Dependent Claim 43 words

The process of claim 3 wherein said polymer is derived from the reaction of a mixture of a maleic compound and a monoethylenically unsaturated monomer wherein said monomer is used in a proportion to provide five moles thereof per mole of maleic compound.

Claim 13

Dependent Claim 27 words

A defoamed composition comprising a liquid system containing water and the defoamer composition of claim 1 dispersed therein as discrete particles present in an effective foam-inhibiting amount.

Claim 14

Dependent Claim 17 words

The composition of claim 11 wherein said liquid system is a mixture of water and a surfactant.

Claim 15

Dependent Claim 14 words

The composition of claim 11 wherein said liquid system is pulp mill black liquor.

Claim 16

Dependent Claim 176 words

A dispersion in an aqueous medium comprising effective foam-inhibiting amount of a defoamer consisting of a mixture of a mineral oil and about 5 to about 50 percent by weight based upon the total weight of said mineral oil and said polymer of a mineral oil-soluble polymer of the formula: ##STR14## wherein X represents hydrogen, alkyl of 1 to about 30 carbon atoms, phenyl, OR', ##STR15## wherein R' is hydrogen or an alkyl group having 1 to about 30 carbon atoms; R" is an alkyl group of 1 to about 30 carbon atoms; R is hydrogen or an unsubstituted or substituted alkyl group having about 8 to about 30 carbon atoms and at least one R is said alkyl group; y is an integer of 1-5; the sum of m, n, and o units is such that the sum of m and o units represents a major proportion thereof and the mole percentage of m, n and o units is such that n and o are each 0 to 25, and m is 50 to 100.

Claim 17

Dependent Claim 176 words

A dispersion in an aqueous medium comprising effective foam-inhibiting amount of a defoamer consisting of a mixture of a mineral oil and about 5 to about 50 percent by weight based upon the total weight of said mineral oil and said polymer of a mineral oil-soluble polymer of the formula: ##STR14## wherein X represents hydrogen, alkyl of 1 to about 30 carbon atoms, phenyl, OR', ##STR15## wherein R' is hydrogen or an alkyl group having 1 to about 30 carbon atoms; R" is an alkyl group of 1 to about 30 carbon atoms; R is hydrogen or an unsubstituted or substituted alkyl group having about 8 to about 30 carbon atoms and at least one R is said alkyl group; y is an integer of 1-5; the sum of m, n, and o units is such that the sum of m and o units represents a major proportion thereof and the mole percentage of m, n and o units is such that n and o are each 0 to 25, and m is 50 to 100.

Claim 18

Dependent Claim 187 words

A dispersion in an aqueous medium comprising an effective foam-inhibiting amount of a defoamer consisting of an effective amount of a surfactant to impart water dispersibility thereto, a mixture of a mineral oil, and about 5 to about 50 percent by weight based upon the total weight of said mineral oil and said polymer of a mineral oil-soluble polymer of the formula: ##STR16## wherein X represents hydrogen, alkyl of 1 to about 30 carbon atoms, phenyl, OR', ##STR17## wherein R' is hydrogen or an alkyl group having 1 to about 30 carbon atoms; R" is an alkyl group of 1 to about 30 carbon atoms; R is hydrogen or an unsubstituted or substituted alkyl group having about 8 to about 30carbon atoms and at least one R is said alkyl group; y is an integer of 1-5; the sum of m, n, and o units is such that the sum of m and o units represents a major proportion thereof and the mole percentage of m, n and o units is such that n and o are each 0 to 25, and m is 50 to 100.

Claim 19

Dependent Claim 187 words

A dispersion in an aqueous medium comprising an effective foam-inhibiting amount of a defoamer consisting of an effective amount of a surfactant to impart water dispersibility thereto, a mixture of a mineral oil, and about 5 to about 50 percent by weight based upon the total weight of said mineral oil and said polymer of a mineral oil-soluble polymer of the formula: ##STR16## wherein X represents hydrogen, alkyl of 1 to about 30 carbon atoms, phenyl, OR', ##STR17## wherein R' is hydrogen or an alkyl group having 1 to about 30 carbon atoms; R" is an alkyl group of 1 to about 30 carbon atoms; R is hydrogen or an unsubstituted or substituted alkyl group having about 8 to about 30carbon atoms and at least one R is said alkyl group; y is an integer of 1-5; the sum of m, n, and o units is such that the sum of m and o units represents a major proportion thereof and the mole percentage of m, n and o units is such that n and o are each 0 to 25, and m is 50 to 100.

Claim 20

Dependent Claim 13 words

The composition of claim 15 wherein said polymer is an alkyl half ester.

Claim 21

Dependent Claim 21 words

The composition of claim 16 wherein said polymer contains 5 moles of said monoethylenically unsaturated monomer per mole of maleic compound.

Claim 22

Dependent Claim 21 words

The composition of claim 16 wherein said polymer contains one mole of said monoethylenically unsaturated monomer per mole of maleic compound.

Claim 23

Dependent Claim 24 words

The composition of claim 16 wherein said monoethylenically unsaturated monomer is selected from the group consisting of styrene, methylvinyl ether, octadecene, and mixtures thereof.

Claim 24

Dependent Claim 14 words

The composition of claim 19 wherein said aqueous medium is pulp mill black liquor.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1983-10-28	1984-04-28	1984-10-28	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1987-10-28	1988-04-28	1988-10-28	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1991-10-28	1992-04-28	1992-10-28	$7700.00	Window Closed / Lapsed

Process for inhibiting foaming utilizing maleic ester copolymer based defoamers, and defoamed compositions

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