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公开(公告)号：US5447603A
公开(公告)日：1995-09-05
申请号：US89354
申请日：1993-07-09
申请人： Robert J. Michalowski , Steven H. Christiansen , R. Keith Frank , Teresa Littleton , Jaime Simon , Walter Vaughn , David A. Wilson
发明人： Robert J. Michalowski , Steven H. Christiansen , R. Keith Frank , Teresa Littleton , Jaime Simon , Walter Vaughn , David A. Wilson
CPC分类号： D21H21/06 , D21C9/002 , D21C9/1042
摘要： The invention is an improvement in a process for making cellulosic articles said process involving a separation of cellulosic material from a mixture containing a liquid, metal cations, and cellulosic material. The improvement involves adding to the mixture at least one retaining material which binds at least one metal cation and, in the separation, is retained with the cellulosic material. Suitable retaining agents are either organic or inorganic and include chelate-forming polymers, both synthetic and natural, colloidal suspensions of inorganic compounds, and mixed metal hydroxides. In each case, the metal cations remain in the cellulosic article, e.g. paper, rather going into waste water from which they would otherwise need to be removed.
摘要翻译： 本发明是制造纤维素制品的方法的改进，所述方法涉及从含有液体，金属阳离子和纤维素材料的混合物中分离纤维素材料。 该改进涉及向混合物中加入至少一种结合至少一种金属阳离子的保留材料，并且在分离中将其与纤维素材料保持在一起。 合适的保留剂是有机或无机的，并且包括无机化合物的合成和天然胶体悬浮液和混合金属氢氧化物的螯合形成聚合物。 在每种情况下，金属阳离子保留在纤维素制品中，例如， 纸，而是进入废水，否则他们将需要从中除去。
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公开(公告)号：US4732650A
公开(公告)日：1988-03-22
申请号：US907694
申请日：1986-09-15
CPC分类号： D21C9/1005
摘要： Bleaching of wood pulp is improved by the combination of a pretreatment of the pulp with a polyaminocarboxylic acid, e.g. ethylenediaminetetraacetic acid, prior to bleaching with an alkaline aqueous peroxide solution containing a stabilizing amount of an aminophosphonic acid derivative together with a polymer of an unsaturated carboxylic acid or amide or an alkylsulfonic acid substituted amide.
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3.发明授权Process for selectively concentrating the radioactivity of thorium containing magnesium slag 失效选择性浓缩含有硫酸镁的硫酸盐的放射性的方法
公开(公告)号：US5223181A
公开(公告)日：1993-06-29
申请号：US676137
申请日：1991-03-27
摘要： Magnesium is separated from magnesium slag containing radioactive thorium and its daughters by solubilizing magnesium from magnesium slurry using carbon dioxide and separating magnesium from magnesium slurry containing thorium and its daughters by filtering. The process concentrates the radioactive thorium and its radioactive daughters from the magnesium slag and reduces the volume of the radioactive waste that requires disposal.
摘要翻译： 通过使用二氧化碳从镁浆中溶解镁并从含有钍及其母体的镁浆中分离镁而将镁与含有放射性钍及其子的镁渣分离。 该过程将放射性钍及其放射性的女儿从镁渣中浓缩，并减少需要处理的放射性废物的体积。
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4.发明授权Composition for alkaline peroxide bleaching of wood pulp using a quaternary amine as additive 失效使用季胺作为添加剂的碱性过氧化物漂白木浆的组合物
公开(公告)号：US5145558A
公开(公告)日：1992-09-08
申请号：US656398
申请日：1991-02-15
IPC分类号： D21C9/10
CPC分类号： D21C9/1042
摘要： A composition for alkaline hydrogen peroxide bleaching of mechanical wood pulp which employs a quaternary amine compound, such as (3-chloro-2-hydroxy-propyl) trimethyl ammonium chloride, in the stabilized bleach solution. The brightness of the final paper product made from such bleached pulp shows marked improvement over that in which only chelating agents are employed to improve the brightness according to the known art. The process is useful in both silicate and silicate-free bleach solutions.
摘要翻译： 用于机械木浆的碱性过氧化氢漂白的组合物，其在稳定的漂白溶液中使用季胺化合物，例如（3-氯-2-羟基 - 丙基）三甲基氯化铵。 由这种漂白纸制成的最终纸制品的亮度显示出比仅使用螯合剂来提高根据已知技术的亮度的纸张的明显改善。 该方法在硅酸盐和无硅酸盐漂白剂溶液中都是有用的。
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5.发明授权Process for alkaline peroxide bleaching of wood pulp using a quaternary amine as additive 失效使用季胺作为添加剂的碱性过氧化物漂白木浆的方法
公开(公告)号：US5013404A
公开(公告)日：1991-05-07
申请号：US437482
申请日：1989-11-15
CPC分类号： D21C9/1042
摘要： A process for alkaline hydrogen peroxide bleaching of mechanical wood pulp which employs a quaternary amine compound, such as (3-chloro-2-hydroxypropyl)trimethyl ammonium chloride, in the stabilized bleach solution. The brightness of the final paper product made from such bleached pulp shows marked improvement over that in which only chelating agents are employed to improve the brightness according to the known art. The process is useful in both silicate and silicate-free bleach solutions.
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公开(公告)号：US5342593A
公开(公告)日：1994-08-30
申请号：US927584
申请日：1992-08-10
IPC分类号： B01D53/14 , B01D53/50 , B01D53/77 , C07D233/72 , C07D239/10 , C07D251/32 , C07D251/34 , C07D263/22 , C07D263/24 , C07D263/44 , C10K1/14 , B01D53/34
CPC分类号： B01D53/1493 , B01D53/507 , C10K1/14
摘要： Sulfur dioxide is removed from a fluid containing SO.sub.2 by employing as an absorbent therefor an aqueous solution of compound represented by Formula I: ##STR1## wherein X is --O--, --NR.sup.1 --, or --N.dbd.; each Y is independently --(CR.sup.2.sub.2)--, --(C.dbd.O)--, --O--, --NR.sup.1 --, --N.dbd., or --C(R.sup.2).dbd.; each R.sup.1 or R.sup.2 is independently hydrogen; an alkyl group; a hydroxyalkyl group; an aldehyde group; a carboxylic acid or salt group; or an alkyl group containing an aldehyde group, a carboxylic acid or salt group, ketone, carboxylic ester, ether, or sulfoxide group; and m is an integer preferably of from 2 to about 4. The absorbent solution preferably can be thermally regenerated by heating to remove SO.sub.2.
摘要翻译： 通过使用式I表示的化合物的水溶液作为吸收剂从含有SO 2的流体中除去二氧化硫：-N =; 每个Y独立地为 - （CR22） - ， - （C = O） - ， - O - ， - NR1 - ， - N =或-C（R2） 每个R 1或R 2独立地是氢; 烷基; 羟基烷基; 醛基; 羧酸或盐基; 或含有醛基，羧酸或盐基的烷基，酮，羧酸酯，醚或亚砜基; m优选为2〜4的整数。吸收剂溶液优选通过加热热再生以除去SO 2。
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公开(公告)号：US5108723A
公开(公告)日：1992-04-28
申请号：US569118
申请日：1990-08-16
CPC分类号： B01D53/1493 , B01D53/507 , C10K1/14
摘要： A process for removing SO.sub.2 from a fluid containing SO.sub.2 by employing as an absorbent for the SO.sub.2 an admixture of water and a compound represented by Formula I: ##STR1## wherein each R.sup.1, R.sup.2 or R.sup.3 is independently hydrogen; an alkyl group; a carboxylic acid group; a hydroxyalkyl group; an aldehyde group; and alkyl group containing a carboxylic ester, a carboxylic acid or salt, ether, aldehyde, ketone or sulfoxide group; wherein at least one R.sup.1 or R.sup.3 is carboxy methyl group and at least one R.sup.1 or R.sup.3 is hydrogen, preferably at least one R.sup.1 is carboxy methyl and at least one R.sup.3 is hydrogen. The absorbent solution preferably can be thermally regenerated by heating to remove SO.sub.2.
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公开(公告)号：US4980471A
公开(公告)日：1990-12-25
申请号：US418292
申请日：1989-10-06
IPC分类号： B01D53/14 , C07D241/08
CPC分类号： C07D241/08
摘要： The 2-piperazinones are made by reacting a 1-cyano-1-hydroxyalkane with ethylenediamine or a substituted ethylenediamine in aqueous solution. The process to make the 2-piperazinones suitable as a regenerable sulfur dioxide absorbing medium requires that the cyano compound be present in at least a molar equivalent amount to the diamine and that the resulting 2-piperazinone product be sparged with an inert gas.
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9.发明授权Process for the preparation of a stable salt-free iron chelate for use in hydrogen sulfide abatement 失效制备用于硫化氢消除的稳定的无盐铁螯合物的方法
公开(公告)号：US5472633A
公开(公告)日：1995-12-05
申请号：US957320
申请日：1992-10-06
摘要： A stable, salt-free iron chelate for use in aqueous alkaline systems is prepared by contacting iron oxide with an aqueous mixture of from 30 to 45 mole percent trisodium HEDTA and from 55 to 70 mole percent EDTA, heating the mixture to dissolve the iron, and adjusting the pH to from 7 to 10 with base.
摘要翻译： 通过使氧化铁与30至45摩尔％的HEDTA三钠和55至70摩尔％的EDTA的水性混合物接触来制备用于水性碱性体系的稳定的无盐铁螯合物，加热混合物以溶解铁， 并用碱调节pH至7至10。
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10.发明授权
公开(公告)号：US5236678A
公开(公告)日：1993-08-17
申请号：US702795
申请日：1991-05-17
申请人： Dane Chang , Steven H. Christiansen
发明人： Dane Chang , Steven H. Christiansen
CPC分类号： C10K1/14 , B01D53/1493 , B01D53/507
摘要： Sulfur dioxide is removed from a fluid containing SO.sub.2 by employing as an absorbent for the SO.sub.2 an aqueous solution of a compound represented by Formula I: ##STR1## wherein each Y is independently --(CR.sup.2.sub.2)--or--(CR.sup.2).dbd.and each R.sup.1 or R.sup.2 is independently hydrogen, an alkyl group; an hydroxyalkyl group: an aldehyde group: a carboxylic acid group or salt thereof: an alkyl group containing at least one carboxylic ester, a carboxylic acid or salt thereof, ether, aldehyde, ketone, or sulfoxide group: wherein the compound has at least one carbonyl group. The absorbent solution preferably can be thermally regenerated by heating to remove SO.sub.2.
摘要翻译： 通过使用作为SO 2的吸收剂，由式I表示的化合物的水溶液：其中每个Y独立地为 - （CR22） - 或 - （CR2）=和 每个R 1或R 2独立地是氢，烷基; 羟基烷基：醛基：羧酸基或其盐：含有至少一个羧酸酯，羧酸或其盐，醚，醛，酮或亚砜基团的烷基：其中该化合物具有至少一个 羰基。 吸收剂溶液优选通过加热热再生以除去SO 2。
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