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1. 发明授权

US6149766A Process for peroxide bleaching of chemical pulp in a pressurized bleaching vessel 失效
标题翻译：在加压漂白容器中过氧化物漂白化学纸浆的方法
公开(公告)号：US6149766A
公开(公告)日：2000-11-21
申请号：US740832
申请日：1996-11-04
申请人： Petter Tibbling , Ulla Ekstrom , Erik Nilsson , Lars-Ove Larsson
发明人： Petter Tibbling , Ulla Ekstrom , Erik Nilsson , Lars-Ove Larsson
IPC分类号： D21C9/10 , D21C9/16 , D21C9/153
CPC分类号： D21C9/1026 , D21C9/1005 , D21C9/163
摘要： A process for chlorine-free bleaching of chemical pulp in association with the production thereof, where a suspension of the pulp preferably has a concentration exceeding 8% of cellulose-containing fiber material and where the pulp entering into a bleaching line is preferably fed continuously through at least one bleaching vessel in the bleaching line, is treated with at least one acid for adjusting the pH to a value below 7, and with a chelating agent, and is subsequently bleached in at least one stage to a brightness exceeding 75% ISO, preferably exceeding 80%, with hydrogen peroxide or the corresponding quantity of another peroxide, employed in a quantity exceeding 5 kg/BDMT, where the peroxide bleaching takes place at elevated temperature and at a pressure in the bleaching vessel which exceeds 2 bar and where the cross-sectional area of the bleaching vessel exceeds 3 m.sup.2 and the area of the metal surface exposed towards the interior of the bleaching vessel is less than 4V m.sup.2, where V indicates the volume in m.sup.3.
摘要翻译：一种与其生产相关的无氯漂白化学纸浆的方法，其中纸浆的悬浮液优选具有超过8％的含纤维素纤维材料的浓度，并且其中进入漂白线的纸浆优选连续地通过漂白线中的至少一个漂白容器用至少一种酸调节至低于7的值，并用螯合剂处理，随后在至少一个阶段漂白至超过75％ISO的亮度，优选超过80％，过氧化氢或相应量的另一种过氧化物，其用量超过5kg / BDMT，其中过氧化物漂白在漂白容器中的升高的温度和压力下发生超过2巴，并且其中漂白容器的横截面积超过3m 2，暴露于漂白容器内部的金属表面面积小于4Vm2，其中 V表示体积（m3）。

2. 发明授权

US5571377A Process for peroxide bleaching of chemical pulp in a pressurized bleach vessel 失效
标题翻译：在加压漂白容器中过氧化物漂白化学纸浆的方法
公开(公告)号：US5571377A
公开(公告)日：1996-11-05
申请号：US244637
申请日：1994-06-07
申请人： Petter Tibbling , Ulla Ekstroom , Erik Nilsson , Lars-Ove Larsson
发明人： Petter Tibbling , Ulla Ekstroom , Erik Nilsson , Lars-Ove Larsson
IPC分类号： D21C9/00 , D21C9/10 , D21C9/147 , D21C9/16 , D21C9/153
CPC分类号： D21C9/163 , D21C9/10 , D21C9/1005 , D21C9/1026
摘要： A process for chlorine-free bleaching of chemical pulp in association with the production thereof, where a suspension of the pulp preferably has a concentration exceeding 8% of cellulose-containing fiber material and where the pulp entering into a bleaching line is preferably fed continuously through at least one bleaching vessel in the bleaching line, is treated with at least one acid for adjusting the pH to a value below 7, and with a chelating agent, and is subsequently bleached in at least one stage to a brightness exceeding 75% ISO, preferably exceeding 80%, with hydrogen peroxide or the corresponding quantity of another peroxide, employed in a quantity exceeding 5 kg/BDMT, where the peroxide bleaching takes place at elevated temperature and at a pressure in the bleaching vessel which exceeds 2 bar and where the cross-sectional area of the bleaching vessel exceeds 3 m.sup.2 and the area of the metal surface exposed towards the interior of the bleaching vessel is less than 4 V m.sup.2, where V indicates the volume in m.sup.3.
摘要翻译： PCT No.PCT / SE93 / 00988 Sec。 371日期：1994年6月7日 102（e）日期1994年6月7日PCT 1993年11月18日PCT公布。 No.W094 / 29511 PCT出版物日期1994年12月22日一种与其生产相关的无氯漂白化学纸浆的方法，其中浆料的悬浮液优选具有超过8％的含纤维素纤维材料的浓度，并且其中纸浆进入漂白线优选通过漂白线中的至少一个漂白容器连续进料，用至少一种酸调节pH至低于7的值，并用螯合剂处理，随后在至少一个阶段中漂白至亮度超过75％的ISO，优选超过80％，过氧化氢或相应量的另一种过氧化物，其用量超过5kg / BDMT，其中过氧化物漂白在漂白容器中的高温和高压下进行，超过 2巴，漂白容器的横截面积超过3平方米，并且暴露于漂白容器内部的金属表面的面积较小超过4 V m2，其中V表示体积（m3）。

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