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公开(公告)号：US06902649B1
公开(公告)日：2005-06-07
申请号：US09689994
申请日：2000-10-13
申请人： Jagannadh V. Satyavolu , David E. Garlie , Kevin R. Anderson , John T. McDonald , Paula R. Krogmann
发明人： Jagannadh V. Satyavolu , David E. Garlie , Kevin R. Anderson , John T. McDonald , Paula R. Krogmann
IPC分类号： A21D2/18 , A23L1/10 , A23L1/308 , A23L1/314 , C08B30/10 , C08L5/14 , D21C3/04 , D21C5/00 , D21C9/14 , D21C9/16 , D21H11/12 , D21H11/20 , D21H17/02 , D21H21/52
CPC分类号： D21H17/02 , A21D2/188 , A23L7/115 , A23L13/426 , A23L33/24 , C08B30/10 , C08L5/14 , D01C1/02 , D06L4/13 , D21C3/04 , D21C3/12 , D21C5/00 , D21H11/12 , D21H11/20 , D21H21/52
摘要： The disclosure provides a process of modifying a seed based fiber (SBF) to form an enhanced fiber additive (EFA). The process includes an acid treatment step and optionally at least one fiber modification step. Preferred EFA products and uses are described.
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公开(公告)号：US20050067124A1
公开(公告)日：2005-03-31
申请号：US10921633
申请日：2004-08-18
IPC分类号： A21D2/18 , A23L1/10 , A23L1/308 , A23L1/314 , C08B30/10 , C08L5/14 , D21C3/04 , D21C5/00 , D21C9/14 , D21C9/16 , D21H11/12 , D21H11/20 , D21H17/02 , D21H21/52
CPC分类号： D21H17/02 , A21D2/188 , A23L7/115 , A23L13/426 , A23L33/24 , C08B30/10 , C08L5/14 , D01C1/02 , D06L4/13 , D21C3/04 , D21C3/12 , D21C5/00 , D21H11/12 , D21H11/20 , D21H21/52
摘要： The disclosure provides a process of modifying a seed based fiber (SBF) to form an enhanced fiber additive (EFA). The process includes an acid treatment step and optionally at least one fiber modification step. Preferred EFA products and uses are described.
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23.发明授权
公开(公告)号：US5876561A
公开(公告)日：1999-03-02
申请号：US843834
申请日：1992-02-28
申请人： Ted Yuan Tsai
发明人： Ted Yuan Tsai
IPC分类号： C07C41/56 , C07C43/315 , C08G4/00 , C08G18/56 , C08G65/20 , C08G65/30 , C08G65/331 , D21C9/02 , D21C9/14 , D21C9/12 , D21C9/153
CPC分类号： C08G65/30 , C07C41/56 , C07C43/315 , C08G18/56 , C08G4/00 , C08G65/20 , C08G65/331 , D21C9/02 , D21C9/14
摘要： A post-digestion treatment method for cellulosic pulps which reduces the generation of dioxins and other chlorinated organics in the pulp, treatment effluent and/or the paper product produced from the pulp. In the treatment, the pulp, following digestion, is washed with a liquid that is essentially free of dioxins or dioxin precursors and simultaneously adjusted in consistency to at least a medium, and preferably a high consistency. Thereafter, the pulp is contacted with a chlorination agent selected from the group consisting of gaseous chlorine dioxide, gaseous chlorine, and gaseous chlorine dioxide which contains a minor amount of gaseous chlorine.
摘要翻译： 用于纤维素纸浆的消化后处理方法，其减少在纸浆，处理流出物和/或由纸浆生产的纸产品中二恶英和其它氯化有机物的产生。 在处理中，消化后的纸浆用基本上不含二恶英或二恶英前体的液体洗涤，同时将稠度调节至至少介质，优选高稠度。 此后，将纸浆与选自气态二氧化氯，气态氯和含有少量气态氯的气态二氧化氯组成的组中的氯化剂接触。
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公开(公告)号：US5770011A
公开(公告)日：1998-06-23
申请号：US572147
申请日：1995-11-17
CPC分类号： D21C9/16
摘要： An elementally chlorine-free method for the delignification and bleaching of pulp which involves the use of a neutral monoperoxysulfate bleaching step to delignify and thus brighten the pulp. The process achieves good selectivities above about 3 even at high delignification degrees of 60% or greater.
摘要翻译： 用于纸浆去木质和漂白的无元素的无氯方法，其涉及使用中性单过氧硫酸盐漂白步骤来脱木素并因此使纸浆变亮。 即使在60％以上的高脱木质度下，该方法也可以获得高于约3的良好选择性。
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公开(公告)号：US5589031A
公开(公告)日：1996-12-31
申请号：US930665
申请日：1992-10-02
CPC分类号： D21C9/147 , D21C9/1057 , D21C9/144 , D21C9/163 , D21H17/00
摘要： A method of bleaching chemical pulp in a sequence comprising at least four bleaching steps with final bleaching in a first and a second chlorine dioxide step. Between the chlorine dioxide steps an alkaline extraction is carried out, and washing takes place between the first chlorine dioxide step and extraction. Immediately after said washing step, NaOH is charged in an amount of 4-10 kg/ton pulp. Thereafter an oxidizing agent is admixed in an amount of at maximum 2 kg/ton pulp. After 15-120 seconds an acid is added for terminating the oxidation treatment and for lowering the pH-value, but without effecting a complete neutralization of residual alkaline.
摘要翻译： PCT No.PCT / SE91 / 00178 Sec。 371日期：1992年10月2日 102（e）日期1992年10月2日PCT 1991年3月7日PCT PCT。 公开号WO91 / 17306 日期1991年11月14日一种在第一和第二二氧化氯步骤中以最终漂白的至少四个漂白步骤的顺序漂白化学纸浆的方法。 在二氧化氯步骤之间进行碱性萃取，并且在第一二氧化氯步骤和萃取之间进行洗涤。 在所述洗涤步骤之后立即将NaOH装入4-10kg /吨纸浆中。 此后，将氧化剂混合至最大2kg /吨纸浆的量。 在15-120秒后，加入酸以终止氧化处理和降低pH值，但不影响残留碱的完全中和。
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公开(公告)号：US5127992A
公开(公告)日：1992-07-07
申请号：US397683
申请日：1989-08-23
CPC分类号： D21C11/0007 , D21C9/14
摘要： A process is provided for the treatment of an acidic aqueous effluent derived from a chlorine or chlorine compound bleaching process. The acidic effluent is reacted with a neutralizing base selected from carbonates, hydroxides and oxides of Al, Cr, Co, Fe, Mg, Mn, and Ni. The neutralized effluent is concentrated and residual base and HCl are subsequently recovered. The concentration of neutralized effluent may be accomplished by passing the neutralized effluent through the cooling tower of the pulp mill.
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公开(公告)号：US5091167A
公开(公告)日：1992-02-25
申请号：US576948
申请日：1990-09-04
申请人： Jorgen Engstrom , Helena Falgen
发明人： Jorgen Engstrom , Helena Falgen
CPC分类号： C01B11/026 , D21C9/14 , D21C9/147
摘要： A process for the production of chlorine dioxide by reacting in a reaction vessel an alkali metal chlorate, mineral acid and a reducing agent in such proportions that chlorine dioxide is produced in a reaction medium which is maintained at a temperature of from about 50.degree. C. to about 100.degree. C. and at an acidity within a range of from about 5N to about 11N. The reaction medium is subjected to subatmospheric pressure sufficient for evaporating water, a mixture of chlorine dioxide, oxgen and water vapour being withdrawn from an evaporation zone in the reaction vessel, and alkali metal sulfate being precipitated in a crystallization zone in the reaction vessel. As the reducing agent hydrogen peroxide is used.
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公开(公告)号：US4869783A
公开(公告)日：1989-09-26
申请号：US214784
申请日：1988-07-01
申请人： Zenon C. Prusas , Clarence L. Oates
发明人： Zenon C. Prusas , Clarence L. Oates
摘要： A chemical pulping process is disclosed wherein wood chips are partially defiberized such that the fibers in the chips are substantially separated from one another but sufficient interfiber bonding is maintained to preserve chip integrity and thereby provide chips having an open porous fibrous network; and the chips are subjected to chemical pulping at an elevated temperature to remove a majority of the lignin in the chips.
摘要翻译： 公开了一种化学制浆方法，其中木屑部分地脱纤维化，使得芯片中的纤维基本上彼此分离，但是保持足够的纤维间粘合以保持芯片完整性，从而提供具有开放多孔纤维网络的芯片; 并且将芯片在升高的温度下进行化学制浆以除去芯片中的大部分木质素。
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公开(公告)号：US4840703A
公开(公告)日：1989-06-20
申请号：US213516
申请日：1988-06-28
申请人： Erkki Malmsten
发明人： Erkki Malmsten
CPC分类号： D21C9/1052 , D21C9/147
摘要： A method for controlling an oxygen-bleaching process of lignocellulosic pulp to a desired degree of delignification.The pulp is passed at a substantially constant temperature into a bleaching reactor wherein the pulp has a substantially constant level at its outlet. The hydrostatic pressure is measured and the quantity of oxygen fed into the reactor is adjusted to reach a desired degree of delignification.
摘要翻译： 控制木质纤维素纸浆的氧漂白过程达到所需脱木素度的方法。 纸浆以基本上恒定的温度通入漂白反应器中，其中纸浆在其出口处具有基本恒定的水平。 测量静水压力，并且调节进料到反应器中的氧气量以达到期望的脱木质度。
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30.发明授权
公开(公告)号：US4729817A
公开(公告)日：1988-03-08
申请号：US810590
申请日：1985-12-19
CPC分类号： D21C9/1005
摘要： The extent of delignification of chemical pulps by oxygen-containing chemicals, preferably hydrogen peroxide, is enhanced by demethylating the pulp prior to such oxidative delignification, to a degree of demethylation of at least about 30%, preferably at least about 50%. Demethylation may be achieved by chemical treatment of the already-formed pulp or by modification to the pulping process to result in demethylated pulp.
摘要翻译： 通过含氧化学物质，优选过氧化氢，化学纸浆脱木质素的程度通过在这种氧化脱木素之前将纸浆去甲基化达到至少约30％，优选至少约50％的去甲基化程度来增强。 脱甲基化可以通过化学处理已经形成的纸浆或通过对制浆方法的改进来实现，以产生脱甲基纸浆。
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