Compositions and processes to increase pulp yield, reduce extractives, and reduce scaling in a chemical pulping process
OwnerMichael M. Blackstone, Atif M. Dabdoubinventors
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Abstract
In general, the present disclosure is directed to compositions and processes to increase pulp yield, reduce extractives, and reduce scaling in a chemical pulping process. In one particular embodiment, for instance, the present disclosure is directed to a composition comprising a surface active agent, an alkaline mixture, at least one polymer, the polymer having a linear backbone segment having two ends, at least one phosphorus component, the phosphorus component chemically linked along the linear backbone segment of the polymer, and at least one end component, the end component chemically linked to one or both ends of the linear backbone segment of the polymer.
Claims19
A process for cooking wood in a cooking liquor medium comprising:
- contacting wood with a composition comprising an alkaline mixture, a surface active agent, and at least one polymer stable at temperatures above 250° C., the at least one polymer comprising a carbon linear backbone segment having two end components or a carbon and phosphorous linear backbone segment having two end components, the at least one polymer comprising at least one phosphorus containing monomer, the phosphorus containing monomer comprising a phosphorous atom that is either directly chemically linked to the linear backbone segment of the polymer, forms part of the linear backbone segment of the polymer, or any combination thereof, the phosphorus containing monomer comprising a phosphonate, a phosphinate, or any combination thereof wherein the phosphinate is formed from a compound having the structure:
- wherein R1 and R2 are, independently, acrylic acid, maleic acid, methacrylic acid, hydroxypropyl acrylate, ethyl acrylate, vinyl acetate, or any combination thereof, or
- wherein R1 and R2 are, independently, acrylic acid, maleic acid, methacrylic acid, hydroxypropyl acrylate, ethyl acrylate, or vinyl acetate, and N(S) comprises the end component comprising nitrogen, sulfur, or any combination thereof;
- and
- cooking the wood that has been contacted with the composition to produce a pulp.
A process for cooking wood in a cooking liquor medium comprising:
- contacting wood with a composition comprising an alkaline mixture, a surface active agent, and at least one polymer stable at temperatures above 250° C., the at least one polymer comprising a carbon linear backbone segment having two end components, the at least one polymer comprising at least one phosphorus containing monomer, the phosphorus containing monomer comprising a phosphorous atom that is directly chemically linked to the linear backbone segment of the polymer, the phosphorus containing monomer comprising a phosphonate;
- and
- cooking the wood that has been contacted with the composition to produce a pulp.
A process for cooking wood in a cooking liquor medium comprising;
- contacting wood with a composition comprising an alkaline mixture, a surface active agent, and at least one polymer stable at temperatures above 250° C., the at least one polymer comprising a carbon and phosphorous linear backbone segment having two end components, the at least one polymer comprising at least one phosphorus containing monomer, the phosphorus containing monomer comprising a phosphorous atom that forms part of the linear backbone segment of the polymer, the phosphorus containing monomer comprising a phosphinate wherein the phosphinate is formed from a compound having the structure:
- wherein R1 and R2 are, independently, acrylic acid, maleic acid, methacrylic acid, hydroxypropyl acrylate, ethyl acrylate, vinyl acetate, or any combination thereof, or
- wherein R1 and R2 are, independently, acrylic acid, maleic acid, methacrylic acid, hydroxypropyl acrylate, ethyl acrylate, or vinyl acetate, and N(S) comprises the end component comprising nitrogen, sulfur, or any combination thereof;
- and
- cooking the wood that has been contacted with the composition to produce a pulp.
A process for cooking wood in a cooking liquor medium comprising:
- contacting wood with a composition comprising an alkaline mixture, a surface active agent, and at least one polymer stable at temperatures above 250° C., the at least one polymer comprising a carbon linear backbone segment having two end components or a carbon and phosphorous linear backbone segment having two end components, the at least one polymer comprising at least one phosphorus containing monomer, the phosphorus containing monomer comprising a phosphorous atom that is either directly chemically linked to the linear backbone segment of the polymer, forms part of the linear backbone segment of the polymer, or any combination thereof, the phosphorus containing monomer comprising a phosphonate, a phosphinate, or any combination thereof wherein the phosphorus containing monomer comprises only one phosphorus atom;
- and
- cooking the wood that has been contacted with the composition to produce a pulp.
Dependencies are inferred from the claim text.