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公开(公告)号：US2359782A
公开(公告)日：1944-10-10
申请号：US38608341
申请日：1941-03-31
Applicant: LOCKPORT COTTON BATTING CO
Inventor： OLIVER RALPH R
CPC classification number: D21C9/1036 , D06L4/23
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公开(公告)号：US2249646A
公开(公告)日：1941-07-15
申请号：US34297640
申请日：1940-06-28
Applicant: DIAMOND ALKALI CO
Inventor： BRAGG ALFRED O
IPC: D21C9/10
CPC classification number: D21C9/1036
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公开(公告)号：US12104321B2
公开(公告)日：2024-10-01
申请号：US18113901
申请日：2023-02-24
Applicant: Beijing Forestry University
Inventor： Feng Xu , Wenqiu Zheng , Xiaoyu Wang , Tingting You , Hongwei Zhu
CPC classification number: D21C9/1036 , D21C9/02 , D21C9/1068
Abstract: An oxygen bleaching method of pulp includes the steps of: adding a solution formulated by a magnesium salt and an activator to an unbleached chemical pulp, stirring to be mixed well, and bleaching by introducing oxygen. The activators are nano zero-valent metals that are conventional, low-cost, and recyclable. These activators can activate low-concentration oxygen at low-temperature in neutral aqueous solution to efficiently generate peroxide anion radicals, so as to promote the generation of hydroperoxide anions and peroxide ions, achieving high efficient delignification. The whole process does not generate waste water, the oxygen consumption is only 50-85% of the original process, the yield is increased by 1.5-2.8% compared with the original system, the pulp brightness is increased to 28-32° SR, and the magnesium salt can be recycled and reused.
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公开(公告)号：USRE49570E1
公开(公告)日：2023-07-04
申请号：US17460632
申请日：2021-08-30
Applicant: GP Cellulose GmbH
Inventor： Arthur J. Nonni , Charles E. Courchene , Christopher Michael Slone , Peter R. Abitz
CPC classification number: D21H11/20 , A61F13/53 , D21C9/002 , D21C9/1036 , D21C9/144 , D21C9/163 , D21H11/04 , D21H11/16 , Y10T428/298
Abstract: A modified kraft pulp fiber with unique properties is provided. The modified fiber can be a modified bleached kraft fiber that is almost indistinguishable from its conventional counterpart, except that it has a low degree of polymerization (DP). Methods for making the modified fiber and products made from it are also provided. The method can be a one step acidic, iron catalyzed peroxide treatment process that can be incorporated into a single stage of a multi-stage bleaching process. The products can be chemical cellulose feedstocks, microcrystalline cellulose feedstocks, fluff pulps and products made from them.
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公开(公告)号：US20180223471A1
公开(公告)日：2018-08-09
申请号：US15504338
申请日：2015-09-07
Applicant: University of Leeds
Inventor： Stephen BURKINSHAW
IPC: D06L4/657 , D06P1/38 , D06P1/39 , D06P1/41 , D06P1/60 , D06P1/00 , D06P1/62 , D06P1/96 , C11D11/00 , C11D3/37
CPC classification number: D06L4/657 , A61K8/66 , A61K2800/884 , A61Q5/08 , C11D3/3715 , C11D3/3719 , C11D11/0017 , D06B19/0088 , D06L1/12 , D06L4/10 , D06L4/12 , D06L4/13 , D06P1/0008 , D06P1/38 , D06P1/39 , D06P1/41 , D06P1/60 , D06P1/62 , D06P1/96 , D21C9/10 , D21C9/1026 , D21C9/1036 , D21C9/163 , Y02P70/643
Abstract: The invention provides a method for the application of a bleaching agent to a substrate, the method comprising the treatment of the substrate in an aqueous system comprising a liquid bleaching agent in a closed container, the treatment being carried out at a ratio of liquor to substrate which does not exceed 3:1. Typically, the method is applied to the bleaching of textile fibres and may optionally comprise a bleaching and scouring treatment. The invention also provides a method for the removal of surplus bleaching agents following the bleaching treatment, the method comprising not more than three aqueous wash-off treatments of the substrate. In addition to facilitating the use of much reduced liquor levels, the method also allows for significant reductions to be achieved in usage levels of bleaching agents, auxiliary agents and rinsing agents, thereby reducing generation of waste liquors requiring disposal. Furthermore, treatment temperatures are also significantly lower than for prior art methods, providing yet further benefits in environmental and cost terms.
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Patent Agency Ranking
公开(公告)号：US20180155871A1
公开(公告)日：2018-06-07
申请号：US15735964
申请日：2016-09-29
Applicant: Imerys Minerals Limited
Inventor： Mikko LIKITALO , Peter BIZA , Bernhard WEBER
CPC classification number: D21C9/1063 , D21C9/08 , D21C9/10 , D21C9/1026 , D21C9/1036 , D21C9/1042 , D21C9/163 , D21H17/68 , D21H21/02 , D21H21/32
Abstract: The present invention relates to compositions for use in an aqueous pulp bleaching process, comprising one or more alkaline earth metal oxides and/or one or more alkaline earth metal hydroxides; one or more alkaline earth metal salts; and optionally, one or more pitch control additives. Methods and kits for the formation of said compositions, are also part of the invention, as is the use of said compositions, methods and kits.
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公开(公告)号：US20170204566A9
公开(公告)日：2017-07-20
申请号：US14797428
申请日：2015-07-13
Applicant: Fibria Celulose S/A
Inventor： Romolo Ranocchia , Ademilson Massoquete , Danilo Oyakawa
CPC classification number: D21H23/04 , D21C3/222 , D21C5/025 , D21C9/005 , D21C9/1036 , D21H11/20 , D21H17/21 , D21H17/24 , D21H17/28 , Y02W30/648
Abstract: The present invention relates to an improved process for producing chemical cellulose pulp wherein biopolymers are added immediately before, during or after a bleaching step, depending on pulp characteristics and on process conditions used. The biopolymers according to the present invention are starches chemically modified by an etherification reaction. This treatment results in a differentiated pulp having improved physical, chemical and mechanical properties when compared with cellulose pulps obtained by traditional processes. The use of said biopolymer alters the relations between important pulp properties rendering their application in papermaking process advantageous. This differentiation increases the possibilities of use and also of new applications, including for the substitution of pulps produced from other cellulose sources. Thus, the present invention also relates to methods of making paper, such as printing, writing, decorative, special or tissue-type papers, through the use of the cellulose pulps modified by the above process.
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158.发明申请公开(公告)号：US20170137996A9
公开(公告)日：2017-05-18
申请号：US14293773
申请日：2014-06-02
Applicant: GP Cellulose GmbH
Inventor： Arthur J. NONNI , Charles E. Courchene , Christopher Michael Slone , Peter R. Abitz
IPC: D21C9/16
CPC classification number: D21C9/163 , A61F13/53 , D21C9/002 , D21C9/1036 , D21C9/144 , D21H11/04 , D21H11/16 , D21H11/20 , Y10T428/298
Abstract: A modified kraft pulp fiber with unique properties is provided. The modified fiber can be a modified bleached kraft fiber that is almost indistinguishable from its conventional counterpart, except that it has a low degree of polymerization (DP). Methods for making the modified fiber and products made from it are also provided. The method can be a one step acidic, iron catalyzed peroxide treatment process that can be incorporated into a single stage of a multi-stage bleaching process. The products can be chemical cellulose feedstocks, microcrystalline cellulose feedstocks, fluff pulps and products made from them.
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159.发明授权公开(公告)号：US09624119B2
公开(公告)日：2017-04-18
申请号：US14303700
申请日：2014-06-13
Applicant: Ecolab USA Inc.
Inventor： David Dotzauer , Thomas R. Mohs , Erin Hill
IPC: C11D1/00 , C11D3/39 , C11D3/395 , C11D3/28 , C11D3/37 , C02F1/72 , B01J31/22 , C11D3/04 , C11D3/08 , C11D3/10 , C11D7/06 , C11D7/12 , C11D7/14 , C11D17/00 , D21C9/10 , D21C9/16 , D21H17/00 , D21H17/37 , D21H17/64 , C02F1/68
CPC classification number: C02F1/722 , B01J31/2295 , B01J2231/70 , B01J2531/72 , C02F1/683 , C02F1/725 , C02F2303/02 , C02F2305/04 , C11D1/00 , C11D3/044 , C11D3/08 , C11D3/10 , C11D3/3761 , C11D3/3776 , C11D3/3932 , C11D3/3935 , C11D7/06 , C11D7/12 , C11D7/14 , C11D17/0039 , C11D17/0047 , C11D17/0052 , D21C9/1036 , D21C9/1078 , D21C9/163 , D21H17/37 , D21H17/64 , D21H17/74
Abstract: Stabilized catalyst detergent compositions are provided in solid formulations of detergents including an active oxygen source and/or a highly alkaline detergent composition. The compositions are suitable for use with additional detergent and/or bleaching compositions while providing stabilized catalysts within a polymeric matrix. Methods or process for manufacturing the compositions, and methods of use for cleaning are disclosed.
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公开(公告)号：US09512562B2
公开(公告)日：2016-12-06
申请号：US13800941
申请日：2013-03-13
Applicant: GP Cellulose GmbH
Inventor： Arthur J. Nonni , Charles E. Courchene , Christopher Michael Slone , Peter R. Abitz
CPC classification number: D21C9/163 , A61F13/53 , D21C9/002 , D21C9/1036 , D21C9/144 , D21H11/04 , D21H11/16 , D21H11/20 , Y10T428/298
Abstract: A modified kraft pulp fiber with unique properties is provided. The modified fiber can be a modified bleached kraft fiber that is almost indistinguishable from its conventional counterpart, except that it has a low degree of polymerization (DP). Methods for making the modified fiber and products made from it are also provided. The method can be a one step acidic, iron catalyzed peroxide treatment process that can be incorporated into a single stage of a multi-stage bleaching process. The products can be chemical cellulose feedstocks, microcrystalline cellulose feedstocks, fluff pulps and products made from them.
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