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公开(公告)号：US20240150960A1
公开(公告)日：2024-05-09
申请号：US18490110
申请日：2023-10-19
CPC分类号： D21C11/0092 , D21C11/0057 , D21C11/10
摘要： Compositions and methods for minimizing fouling and/or reducing the viscosity of black liquor in a Kraft pulping process are provided. An exemplary composition includes an anionic sulfate or sulfonate surfactant; an anionic sulfate or sulfonate dispersant; and a nonionic alkoxylated surfactant.
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公开(公告)号：US20240035232A1
公开(公告)日：2024-02-01
申请号：US18358121
申请日：2023-07-25
摘要： A strength additive composition for papermaking processes using high-kappa furnish is disclosed. The composition comprises an aqueous media and a glyoxalated polyacrylamide (gPAM) resin having a weight average molecular weight (Mw) of at least about 5 MDa, a radius of gyration (Rg) of at least about 150 nm, and a structural density (Rg/Mw) of less than about 15 nm/Mda. A method of preparing the composition is also disclosed, and may be carried out in situ during a papermaking process (i.e., as an on-site method). A process of forming paper with the composition is also disclosed, and comprises combining the composition with an aqueous suspension of cellulosic fibers, forming the cellulosic fibers into a sheet, and drying the sheet to produce a paper.
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公开(公告)号：US11879031B2
公开(公告)日：2024-01-23
申请号：US17076955
申请日：2020-10-22
发明人： Daniel F. Varnell
CPC分类号： C08F6/12 , B01D17/042 , C08F6/28 , C08F20/56 , B01D2257/80
摘要： Provided are methods for the purification of polymer solutions. In particular, the method enables the separation of impurities from an oxazoline polymer solution by raising the temperature of the polymer solution above its lower critical solution temperature (LCST), wherein a water rich phase and a polymer rich phase separation occurs. The phases are then separated with the polymer rich phase containing a lower amount of impurities than before separation.
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公开(公告)号：US20230357067A1
公开(公告)日：2023-11-09
申请号：US17661930
申请日：2022-05-04
发明人： Nathalie Bruzzano , Markus Bröcher
IPC分类号： C02F11/147 , C08F220/34 , C08F220/56 , C02F11/127 , C02F11/122
CPC分类号： C02F11/147 , C08F220/34 , C08F220/56 , C02F11/127 , C02F11/122
摘要： The present disclosure generally relates to dewatering aqueous sludge that is produced by waste water or sewage treatment facilities such as from municipal and industrial processes. The method includes treating an aqueous sludge with a cationic polyacrylamide terpolymer that includes an acrylamide; a first cationic monomer and a second cationic monomer that is different from the first monomer, and dewatering the treated aqueous sludge.
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公开(公告)号：US20230279614A1
公开(公告)日：2023-09-07
申请号：US18152876
申请日：2023-01-11
摘要： Methods for manufacturing sized paper products are provided. An exemplary method includes producing a foam of water, air, a foaming agent, and a sizing agent. Further, the exemplary method includes applying the foam to a web and processing the web to form the product.
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公开(公告)号：US20230235509A1
公开(公告)日：2023-07-27
申请号：US18156476
申请日：2023-01-19
CPC分类号： D21H17/455 , D21H17/19 , C08L33/26
摘要： A drainage-optimized additive composition for papermaking is disclosed. The composition comprises an aqueous media and a glyoxalated polyacrylamide (gPAM) resin having a weight average molecular weight (Mw) of at least about 5 MDa. The composition comprises from about 1.95 to about 2.45 wt. % of the gPAM resin. A method of preparing the composition is also disclosed, and comprises preparing a cationic acrylamide (cAM) prepolymer having at least one predetermined property, and selectively glyoxalating the cAM prepolymer by controlling the concentration of the cAM prepolymer in the aqueous media during glyoxalation in relation to the predetermined property. The method may be carried out in situ during a papermaking process (i.e., as an on-site method). A process of forming paper with the composition also disclosed, and comprises combining the composition with the aqueous suspension of cellulosic fibers, forming the cellulosic fibers into a sheet, and drying the sheet to produce a paper.
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7.发明公开公开(公告)号：US20230193562A1
公开(公告)日：2023-06-22
申请号：US18069271
申请日：2022-12-21
摘要： A method of controlling volatile fatty acid (VFA) content in a pulp, paper, and/or board making processes is disclosed. The method may be used to provide process improvements in the form of reduced microbial contamination and odor, reduced starch degradation, optimized retention, and improved runability. The method includes treating a process flow comprising a cellulosic material comprising a starch with a VFA control agent. The VFA control agent is non-biocidal, comprises a surfactant or dispersant, a chelator or sequestrant, or a combination thereof, is capable of inhibiting amylase activity in the process flow, and is utilized in an amount sufficient to inhibit microbiological production of one or more VFA. The method optionally includes treating the process flow with a biocidal agent in combination with the VFA control agent.
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8.发明公开公开(公告)号：US20230193076A1
公开(公告)日：2023-06-22
申请号：US18057823
申请日：2022-11-22
IPC分类号： C09D177/06
CPC分类号： C09D177/06
摘要： A method for preparing an adhesive resin for use in a coating composition for a crepe paper manufacturing process that includes the steps of reacting a polycarboxylic acid or a derivative of a polycarboxylic acid with a polyamine to form a polyamidoamine intermediate; reacting a polyetheramine with an epihalohydrin to form a polyetheramine-epihalohydrin intermediate and reacting the polyamidoamine intermediate with the polyetheramine-epihalohydrin intermediate to form a polyamidoamine polyetheramine-epihalohydrin resin.
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公开(公告)号：US11535538B2
公开(公告)日：2022-12-27
申请号：US16340988
申请日：2017-10-04
发明人： Stephan Nied , Helena Kondardi , Lisa Marie Winzen
摘要： Formulation F comprising A) 50 to 90 parts by weight of at least one block copolymer P of ethyleneoxide and propylene oxide, B) 0.5 to 10 parts by weight of at least one salt of an alkyl sulfate S, C) 0.05 to 0.5 parts by weight of a composition C comprising C1) 5 to 10 parts by weight of at least one polydimethylsiloxane bearing only terminal alkyl groups, C2) 1 to 3 parts by weight of at least one polydimethylsiloxane bearing at least alkoxylated hydroxy group, C3) at least one solvent, wherein said formulation F is an aqueous formulation.
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公开(公告)号：US20220228320A1
公开(公告)日：2022-07-21
申请号：US17647861
申请日：2022-01-13
发明人： Robert Pelton , Hongfeng Zhang
摘要： Treated substrates and methods of forming the same are provided. In an exemplary embodiment, a treated substrate includes lignocellulose and a polymer fixed to the lignocellulose to form the treated substrate. The polymer includes a succinic moiety that can reversibly change between a succinic anhydride and a succinic acid moiety. The treated substrate has a wet tensile index of about 3 newton meters per gram or less.
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