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公开(公告)号：US4338158A
公开(公告)日：1982-07-06
申请号：US274591
申请日：1981-06-17
Applicant: Jozef M. Bentvelzen
Inventor： Jozef M. Bentvelzen
CPC classification number: D21C3/22 , D21C9/1036
Abstract: In a two-stage cellulosic pulping and bleaching system having first-stage pulping using standard pulping chemicals and second-stage bleaching using an alkaline oxygen system, the addition of a protector occurs only in the first stage pulping instead of between the first and second stages or in the second stage bleach. A magnesium compound is normally used as the protector.
Abstract translation: 在具有使用标准制浆化学品的第一级制浆和使用碱性氧系统的第二级漂白的两阶段纤维素制浆和漂白系统中，仅在第一阶段制浆而不是在第一和第二阶段之间进行保护剂的添加 或在第二阶段漂白。 通常使用镁化合物作为保护剂。
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82.发明授权Oxygen-alkali delignification of lignocellulosic material in the presence of a manganese compound 失效在锰化合物存在下，木质纤维素材料的氧碱脱木质素
公开(公告)号：US4087318A
公开(公告)日：1978-05-02
申请号：US754717
申请日：1976-12-27
Applicant: Hans Olof Samuelson , Kjell Evert Abrahamsson
Inventor： Hans Olof Samuelson , Kjell Evert Abrahamsson
CPC classification number: D21C9/1036 , D21C1/00 , D21C3/222 , D21C9/1005
Abstract: A process is provided for the delignification of lignocellulosic material wherein the lignocellulosic material, prior to the delignification, is treated with water or an aqueous solution to remove compounds which catalyze the degradation of carbohydrates and then the delignification is carried out with oxygen and alkali in the presence of a manganese compound to improve the selectivity of the delignification and increase the rate of delignification.
Abstract translation: 提供了一种用于木质纤维素材料脱木质素的方法，其中木质纤维素材料在脱木质素之前用水或水溶液处理以除去催化降解碳水化合物的化合物，然后脱木质素用氧和碱进行 存在锰化合物以提高脱木素的选择性并增加脱木质素的速率。
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公开(公告)号：US3878037A
公开(公告)日：1975-04-15
申请号：US37483973
申请日：1973-06-29
Applicant: BETZ LABORATORIES
Inventor： HANSEN GERALD D , VARNEY ELIZABETH G , DAVIS PHILIP S
CPC classification number: D21C9/1036
Abstract: The present invention is directed to pulp bleaching processes, and in particular compositions for use in the bleaching process to enhance the efficiency of the process. It was discovered that if a low molecular weight water soluble polymer of acrylic acid, or water soluble salt thereof was added either alone or together with a carboxymethyl cellulose to the bleaching solution, that less bleaching solution was required.
Abstract translation: 本发明涉及纸浆漂白方法，特别是用于漂白方法中用于提高该方法效率的组合物。 发现如果将低分子量水溶性丙烯酸聚合物或其水溶性盐单独或与羧甲基纤维素一起加入到漂白溶液中，则需要较少的漂白溶液。
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公开(公告)号：US3749672A
公开(公告)日：1973-07-31
申请号：US3749672D
申请日：1971-04-19
Applicant: DU PONT
Inventor： GOLTON W , RUTKIEWIC A
CPC classification number: C02F1/50 , C11D3/3955 , C11D3/3956 , D21C9/008 , D21C9/1036 , D21C9/12
Abstract: DESCRIBED AND CLAIMED ARE STABLE AQUEOUS SYSTEMS CONTAINING AN N-HYDROGEN COMPOUND AND A HYPOBROMITE, HYPOCHLORIDE OR HYPOIODITE IN EQUILIBRIUM WITH THE CORRESPONDING N-HALO COMPOUND OR COMPOUNDS. STABILITY IS PROVIDED BY INCLUSION OF A BUFFER WHICH MAINTAINS PH OF THE SYSTEM BETWEEN 4 AND 11. THE SYSTEMS CAN BE USED WHEREVER GRADUAL RELEASE OF ACTIVE HALOGEN IS DESIRED, E.G. AS HOUSEHOLD LAUNDRY OR INDUSTRIAL BLEACHES OR AS AGENTS FOR CONTROL OF MICRO-ORGANISMS IN PROCESS WATER STREAMS.
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85.发明授权Bleaching of mechanical pulps with hydrosulfite in the presence of an alkali metal silikate 失效在ALKALI金属硅酸盐存在下，具有氢化石墨的机械粉末的漂白
公开(公告)号：US3709779A
公开(公告)日：1973-01-09
申请号：US3709779D
申请日：1971-11-17
Applicant: INT PAPER CANADA
Inventor： GUPTA V
IPC: D21C9/10
CPC classification number: D21C9/1036
Abstract: A PROCESS IS DESCRIBED IN WHICH MECHANICAL PULPS ARE BLEACHED WITH SODIUM OR ZINC HYDROSULFITE IN THE PRESENCE OF SODIUM SILICATE. THE ADDITION OF SILICATE INCREASES THE BRIGHTNESS GAIN OBTAINED BY HYDROSULFITE ALONE AND REDUCES THE GRINDING POWDER CONSUMPTION. SILICATE CAN THUS REPLACE SODIUM TRIPOLYPHOSPHATE FOR THIS USE AND THEREBY ELIMINATE PHOSPHATE POLLUTION DUE TO NEWSPRINT OR OTHER PAPER MILL EFFLUENTS.
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Patent Agency Ranking86.发明授权Delignification and bleaching of cellulose pulp with oxygen gas in an allsaline medium in the presence of a protector 失效在保护剂存在的情况下，在氧化铝介质中的氧气与氧气的分级和漂白
公开(公告)号：US3657065A
公开(公告)日：1972-04-18
申请号：US3657065D
申请日：1969-06-11
Applicant: SOUTH AFRICAN PULP PAPER , AIR LIQUIDE
Inventor： SMITH LEON , CALVERT DAVID W , ROBERT ANDRE , VIALLET ANDRE
IPC: D21C9/10
CPC classification number: D21C9/1036
Abstract: A method of delignifying and bleaching a chemical or semichemical cellulose pulp with oxygen gas in an alkaline medium, preferably sodium hydroxide, and in the presence of a protector, the method being characterized in that the protector is selected from the group consisting of silica; an alkali metal silicate, such as sodium silicate; an alkaline earth metal silicate, such as magnesium silicate; an alkaline earth metal phosphate, such as magnesium phosphate; an alkaline earth metal oxide, such as magnesium oxide; an alkaline earth metal peroxide; an alkaline earth metal hydroxide or a material forming an alkaline earth metal hydroxide, such as magnesium hydroxide or a material forming magnesium hydroxide in situ; and a soluble salt of magnesium other than magnesium carbonate.
Abstract translation: 一种在碱性介质（优选氢氧化钠）中用氧气将化学或半化学纤维素纸浆脱木质素和脱色的方法，并且在保护剂存在下，该方法的特征在于保护剂选自二氧化硅 ; 碱金属硅酸盐，如硅酸钠; 碱土金属硅酸盐，如硅酸镁; 碱土金属磷酸盐，如磷酸镁; 碱土金属氧化物，如氧化镁; 碱土金属过氧化物; 碱土金属氢氧化物或形成碱土金属氢氧化物如氢氧化镁或原位形成氢氧化镁的材料的材料; 以及碳酸镁以外的镁的可溶性盐。
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87.发明授权Process for treating cellulosic materials with alkali and oxygen in the presence of complex magnesium salts 失效在复合镁盐存在下用碱处理和氧化处理细胞材料的方法
公开(公告)号：US3652386A
公开(公告)日：1972-03-28
申请号：US3652386D
申请日：1969-10-27
Applicant: MO OCH DOMSJOE AB
Inventor： NOREUS STURE ERIK OLOF , SMAUELSON HANS OLOF
CPC classification number: D21C9/1036
Abstract: The invention is of particular application to the reduction of lignin content in cellulose pulps without causing deleterious degradation of the cellulose, the complex magnesium salts, such as chelates of magnesium and aliphatic alpha- and betahydroxycarboxylic acids, reducing or entirely preventing attack of oxygen on the hemicellulose and cellulose carbohydrates, without appreciably diminishing the oxidation of the lignin and its dissolution in the course of the process.
Abstract translation: 本发明特别适用于纤维素纸浆中木质素含量的降低，而不会引起纤维素的有害降解，复杂的镁盐如镁和脂族α-和β-羟基羧酸的螯合物，减少或完全防止氧的侵蚀 在半纤维素和纤维素碳水化合物上，没有明显地减少木质素的氧化及其在该过程中的溶解。
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公开(公告)号：US3472732A
公开(公告)日：1969-10-14
申请号：US3472732D
申请日：1965-12-21
Applicant: CONTINENTAL CAN CO
Inventor： BODENHEIMER VERNON B , SMITH JIMMIE H , COLEMAN HENRY C
CPC classification number: D21C9/1036
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89.发明授权
公开(公告)号：US3308012A
公开(公告)日：1967-03-07
申请号：US30317663
申请日：1963-08-19
Applicant: DU PONT
Inventor： TOBAR RAMON U
IPC: D21C9/10
CPC classification number: D21C9/1036
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公开(公告)号：US2989519A
公开(公告)日：1961-06-20
申请号：US80829859
申请日：1959-04-23
Applicant: INT PAPER CANADA
Inventor： HERBST JOHN H E , KRASSIG HANS A
IPC: D21C9/10
CPC classification number: D21C9/1036
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