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US 6,238,486 B1Granted
Detectable cationic flocculant and method of using same in industrial food processes
AssigneeNalco Chemical Company
InventorsAndrew J. Dunham, Cathy C. Johnson, Kristine S. Salmen, John W. Sparapany, Anthony G. Sommese
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Abstract
The invention provides novel cationic flocculant dispersion polymers that can be utilized in the methods disclosed herein. This invention also provides methods for detecting cationic flocculants wherein said flocculants may be made via a dispersion process, a latex process or a dry polymer process. The flocculants are used to flocculate solids from liquid components of an industrial food process. The detection method involves the use of monoclonal antibodies to determine the presence or concentration of the cationic flocculants in the liquids.
Claims15
A cationic flocculant dispersion polymer comprising:
- a first monomer component, which is nonionic;
- a second monomer component, which is cationic;
- and
- a third monomer component which is diallyl dimethylammonium chloride;
- wherein the first monomer component, which is nonionic, is selected from the group consisting of:
- acrylamide, vinylacetate, vinylcaprolactam, protonanted acrylamidopropylsulfonic acid, protonated 2-sulfoethylacrylate;
- substituted or non-substituted amides or esters of acrylic acid, including, but not limited to:
- N,N,-dimethylacrylamide, N-t-butylacrylamide, N-isopropyl acrylamide, hydroxymethylacrylate, hydroxyethylacrylate, hydroxypropylacrylate, and hydroxybutylacrylate;
- substituted or non-substituted amides or esters of methacrylic acid, including, but not limited to:
- N,N-dimethylmethacrylamide, N-methylmethacrylamide, N-isopropyl methacrylamide, hydroxymethylmethacrylate, hydroxyethylmethacrylate, hydroxypropylmethacrylate, and hydroxybutylmethacrylate;
- wherein the second monomer component, which is cationic, is selected from the group consisting of dimethylaminoethylacrylate methyl chloride salt;
- dimethylaminoethylmethacrylate methyl chloride salt;
- dimethylaminoethylmethacrylate methyl sulfate salt;
- dimethylaminoethylmethacrylate benzyl chloride salt;
- dimethylaminoethylacrylate methyl sulfate salt;
- dimethylaminoethylacrylate benzyl chloride salt, methacrylamidopropyl trimethylammonium chloride;
- acrylamidopropyl trimethylammonium chloride;
- 2-vinylpyridine;
- and 4-vinylpyridine.
16 more elements
A method of flocculating solids from the liquid component of an industrial food process, the method comprising the steps of:
- a) adding a cationic flocculant polymer to a liquid component of an industrial food process which causes the formation of flocculated particles, wherein said cationic flocculent polymer comprises a first monomer component, which is nonionic;
- a second monomer component, which is cationic;
- and
- a third monomer component which is diallyl dimethylammonium chloride;
- wherein the first monomer component, which is nonionic, is selected from the group consisting of:
- acrylamide, vinylacetate, vinylcaprolactam, protonated acrylamidopropylsulfonic acid, protonated 2-sulfoethylacrylate;
- substituted or non-substituted amides or esters of acrylic acid, including, but not limited to:
- N,N,-dimethylacrylamide, N-t-butylacrylamide, N-isopropyl acrylamide, hydroxymethylacrylate, hydroxyethylacrylate, hydroxypropylacrylate, and hydroxybutylacrylate;
- substituted or non-substituted amides or esters of methacrylic acid, including, but not limited to:
- N,N-dimethylmethacrylamide, N-methylmethacrylamide, N-isopropyl methacrylamide, hydroxymethylmethacrylate, hydroxyethylmethacrylate, hydroxypropylmethacrylate, and hydroxybutylmethacrylate;
- wherein the second monomer component, which is cationic, is selected from the group consisting of:
- dimethylaminoethylacrylate methyl chloride salt;
- dimethylaminoethylmethacrylate methyl chloride salt;
- dimethylaminoethylmethacrylate methyl sulfate salt;
- dimethylaminoethylmethacrylate benzyl chloride salt;
- dimethylaminoethylacrylate methyl sulfate salt;
- dimethylaminoethylacrylate benzyl chloride salt, methacrylamidopropyl trimethylammonium chloride;
- acrylamidopropyl trimethylammonium chloride;
- b) separating said flocculated particles from said liquid component;
- and
- c) determining the concentration of said cationic flocculant polymer in the liquid;
- wherein the step of determining the concentration of the cationic flocculant polymer further comprises:
- i) incubating the sample of liquid with a monoclonal antibody having an affinity for the cationic flocculant polymer, the affinity being strong enough to recognize a monomer antigen in the cationic flocculant polymer and to differentiate the cationic flocculant polymer from other polymers in the sample;
- ii) detecting and measuring the degree of binding of the monoclonal antibody with the monomer antigen;
- and
- iii) determining the concentration of the cationic flocculant polymer based on the degree of binding of the monoclonal antibody.
23 more elements
Dependencies are inferred from the claim text.