Flocculation process using lactam or vinyl sulfonate polymer
AssigneePhillips Petroleum Company
InventorsG. Allan Stahl, Henry L. Hsieh, Ahmad Moradi-Araghi
Life of this patent
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Abstract
A process capable of operation under hostile conditions for accelerating the sedimentation of suspended solids in an aqueous suspension using a flocculating agent comprising a water-soluble polymer composition produced from a monomer composition comprising at least one of a hydrophilic N-vinyl lactam or a hydrophilic vinyl-containing sulfonate.
Claims28
A flocculating process comprising adding a polymer of an N-vinyl lactam and an unsaturated amide of the formula ##STR14## where R" is an unsaturated 1-alkenyl radical to a liquid containing solids, wherein the temperature of the liquid is at least about 170.degree. F.
A flocculating process comprising adding a polymer of an N-vinyl lactam and an unsaturated amide to a liquid containing solids, wherein said liquid has a salinity of at least 10 grams per kilogram of solution.
In a process for accelerating the sedimentation of suspended solids in an aqueous suspension by mixing with a flocculating agent, the improvement comprising using as the flocculating agent a water-soluble polymer composition produced from a monomer composition comprising at least one of a hydrophilic N-vinyl lactam, at least one unsaturated amide of the formula ##STR15## wherein R" is an unsaturated 1-alkenyl radical and at least one of a hydrophilic vinyl-containing sulfonate, wherein said polymer is contacted with said suspended solids at hostile environment conditions defined as including a temperature above 170.degree. F. for a time sufficient for polymer aging.
A flocculating process comprising combining a solids-bearing liquid and a water-soluble polymer produced from a monomeric composition comprising at least one of a hydrophilic N-vinyl lactam, at least one of a hydrophilic .alpha.-, .beta.- unsaturated carboxylic acid or a salt thereof, at least one of a hydrophilic unsaturated amide of the formula, ##STR16## where R" is an unsaturated radical and at least one of a hydrophilic vinyl-containing sulfonic acid or a salt thereof wherein said water soluble polymer is exposed to hostile conditions defined as being at a temperature and a multivalent ion concentration above the infinite days line of FIG. 14.
A flocculating process comprising combining a solids-bearing liquid and a water-soluble polymer produced from a monomer composition comprising N-methyl-N-vinylacetamide and acrylamide wherein said water soluble polymer is exposed to hostile conditions defined as being at a temperature and a multivalent ion concentration above the infinite days line of FIG. 14 thereby forming flocculated solids and a treated liquid.
A flocculating process comprising combining a solids-bearing liquid and a water-soluble polymer produced from a monomeric composition comprising N-methyl-N-vinylacetamide and at least one of a hydrophilic vinyl-containing sulfonate wherein said water soluble polymer is exposed to hostile conditions defined as being at a temperature and a multivalent ion concentration above the infinite days line of FIG. 14 thereby forming flocculated solids and a treated liquid.
A flocculating process comprising combining a solids-bearing liquid and a water-soluble polymer produced from a monomer composition comprising N-vinyl-2-pyrrolidone, at least one of an unsaturated amide of the formula ##STR17## where R" is an unsaturated 1-alkenyl radical and at least one of a hydrophilic component of the formula ##STR18## R is methyl, ethyl or H, provided further that at least one of the R groups on the terminal carbon of the vinyl group is H and the other is H or methyl, M is H, Na.sup.+, K.sup.+, Li.sup.+, R"".sub.4 N.sup.+, Ca.sup.++, Mg.sup.++, Zn.sup.++, Sr.sup.++, Fe.sup.++, Mn.sup.++, .sup.+ NH.sub.3 R.sup.1 NH.sub.3.sup.+ where R.sup.1 is a 1-20 carbon atoms divalent hydrocarbon radical, R"" is H, --ROH or a 1-3 carbon atoms alkyl group, wherein X is selected from ##STR19## where n is an integer of 1-5, and R"' is a 1-3 carbon atom alkyl group or H, wherein said water soluble polymer is exposed to hostile conditions defined as being at a temperature and a multivalent ion concentration above the infinite days line of FIG. 14 thereby forming flocculated solids and a treated liquid.
A flocculating process comprising the steps of
- (a) combining a solids-bearing solution and a water-soluble polymer produced from a monomeric composition comprising at least one of a hydrophilic N-vinyl amide and at least one of another unsaturated amide of the formula ##STR20## where R" is an unsaturated 1-alkenyl radical thereby forming a polymer-bearing, solids-bearing solution;
- (b) exposing said polymer-bearing, solids-bearing solution to hostile conditions defined as being a temperature and a multivalent ion concentration above the infinite days line of FIG. 14;
- and
- (c) separating the product of step (b) into a flocculated solids first part and a treated liquids second part wherein said polymer employed in step (a) has been preaged or said polymer in said polymer-bearing, solid-bearing solution in step (b) is aged in step (b) by exposure to said hostile conditions for a time sufficient to insure polymer aging.
A flocculating process comprising the steps of
- (a) combining a solids-bearing solution and a water-soluble polymer produced from a monomeric composition comprising at least one of a hydrophilic N-vinyl amide and at least one of a hydrophilic vinyl-containing sulfonate thereby forming a polymer-bearing, solids-bearing solution;
- (b) exposing said polymer in said polymer-bearing, solids-bearing solution to hostile conditions defined as being at a temperature and a multivalent ion concentration above the infinite days line of FIG. 14;
- and
- (c) separating the product of step (b) into a flocculated solids first part and a treated liquids second part wherein said polymer employed in step (a) has been preaged or said polymer in said polymer-bearing, solid-bearing solution in step (b) is aged in step (b) by exposure to said hostile conditions for a time sufficient to insure polymer aging.
A flocculating process comprising the steps of
- (a) combining a solids-bearing solution and a water-soluble polymer produced from a monomeric composition comprising at least one of a hydrophilic N-vinyl amide, at least one of another unsaturated amide of the formula ##STR21## where R" is an unsaturated 1-alkenyl radical and at least one of a hydrophilic component of the formula ##STR22## R is methyl, ethyl or H, provided further that at least one of the R groups on the terminal carbon of the vinyl group is H and the other is H or methyl, M is H, Na.sup.+, K.sup.+, Li.sup.+, R"".sub.4 N.sup.+, Ca.sup.++, Mg.sup.++, Zn.sup.++, Sr.sup.+ , Fe.sup.++, Mn.sup.++, .sup.+ NH.sub.3 R.sup.1 NH.sub.3.sup.+ where R.sup.1 is a 1-20 carbon atoms divalent hydrocarbon radical, R"" is H, --ROH or a 1-3 carbon atoms alkyl group, wherein X is selected from ##STR23## where n is an integer of 1-5, and R"' is a 1-3 carbon atom alkyl group or H, thereby forming a polymer-bearing, solids-bearing solution;
- (b) exposing said polymer-bearing, solids-bearing solution to hostile conditions defined as being a temperature and a multivalent ion concentration above the infinite days line of FIG. 14;
- and
- (c) separating the product of step (b) into a flocculated solids first part and a treated liquids second part wherein said polymer employed in step (a) has been preaged or said polymer in said polymer-bearing, solid-bearing solution in step (b) is aged in step (b) by exposure to said hostile conditions for a time sufficient to insure polymer aging.
Dependencies are inferred from the claim text.