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    • 2. 发明授权
    • Delignification of lignocellulosic material with an alkaline liquor
containing a cyclic amino compound
    • 用含有环状氨基化合物的碱性液体脱木质纤维素材料
    • US4134787A
    • 1979-01-16
    • US910164
    • 1978-05-26
    • Robert C. Eckert
    • Robert C. Eckert
    • D21C3/22D21C3/02D21C3/20
    • D21C3/222
    • A process for the delignification of a lignocellulosic material, which comprises the steps of: (a) digesting the lignocellulosic material with an aqueous, alkaline pulping liquor containing from about 0.1% to about 10% based on the weight of oven-dried lignocellulosic material, of a cyclic amino compound selected from the group consisting of phenazine, dihydrophenazine, quinoxaline, and their alkyl, alkoxy, hydroxy, carboxy and amino derivatives at a temperature of from about 150.degree. C. to about 200.degree. C. for a period of from about 5 to about 480 minutes; and then (b) removing the aqueous pulping liquor from the lignocellulosic material with water or an aqueous wash liquor inert to the lignocellulosic material to obtain a delignified cellulosic material.
    • 一种用于木质纤维素材料脱木质素的方法,其包括以下步骤:(a)基于烘干的木质纤维素材料的重量,含有约0.1%至约10%的水性碱性制浆液来消化木质纤维素材料, 的选自吩嗪,二氢吩嗪,喹喔啉及其烷基,烷氧基,羟基,羧基和氨基衍生物的环状氨基化合物在约150℃至约200℃的温度下反应一段时间 约5至约480分钟; 然后(b)用对木质纤维素材料惰性的水或含水洗涤液从木质纤维素材料中除去水性制浆液,以获得脱木素纤维素材料。
    • 5. 发明授权
    • Delignification and bleaching process for lignocellulosic pulp with
peroxide in the presence of metal additives
    • 在金属添加剂存在下,用过氧化物对木质纤维素纸浆进行脱木质素和漂白工艺
    • US4427490A
    • 1984-01-24
    • US253294
    • 1981-04-13
    • Robert C. Eckert
    • Robert C. Eckert
    • D21C9/10D21C9/16
    • D21C9/1036D21C9/163
    • A process and solution for delignifying and brightening lignocellulosic pulp. The solution comprises from about 0.1 to about 5% by weight, based on oven-dried pulp of a peroxide and about 0.5 to about 20 mole percent, based on the moles of peroxide, of a metal ion selected from the group consisting of tungsten, molybdenum, chromium, osmium and selenium. The preferred process of this invention comprises contacting a lignocellulosic pulp with about 0.5 to about 20 mole percent, based on moles of peroxide, of a metal ion selected from the group consisting of tungsten, molybdenum, chromium, osmium and selenium at a temperature below about 50.degree. C.; adjusting the pH of the resultant pulp slurry to between about 1 and about 7; adding 0.1 to about 5% by weight based on oven-dried pulp of peroxide and effecting pulp delignification and brightening at about 30.degree. C. to about 100.degree. C. until most of the peroxide has been consumed.
    • 木质纤维素木浆脱木素和增白剂的工艺和解决方案。 基于过氧化物的烘干纸浆和基于过氧化物摩尔数的约0.5至约20摩尔%的溶液,所述溶液包含选自下组的金属离子的约0.1至约5重量%:钨, 钼,铬,锇和硒。 本发明的优选方法包括使木质纤维素纸浆与约0.5至约20摩尔%(以摩尔数计)的过氧化物接触,所述金属离子选自钨,钼,铬,锇和硒,温度低于约 50℃。 将所得纸浆的pH调节至约1至约7; 基于烘干的过氧化物纸浆加入0.1至约5重量%,并在约30℃至约100℃下进行纸浆脱木素和增白,直到大部分过氧化物被消耗。
    • 7. 发明授权
    • Manganic ion delignification of lignocellulosic material
    • 木质纤维素材料的锰离子脱木质素
    • US4141786A
    • 1979-02-27
    • US844553
    • 1977-10-25
    • Robert C. Eckert
    • Robert C. Eckert
    • D21C9/10
    • D21C9/1078
    • A process for delignifying lignocellulosic pulps, which comprises the steps of (a) impregnating a lignocellulosic pulp slurry with a water-soluble manganous salt having a manganous ion concentration of from about 1% to about 10%, by weight of oven-dried pulp; (b) mixing the impregnated pulp slurry with an amount of alkali equal to the stoichiometric quantity of alkali required to precipitate the soluble manganous ion as insoluble manganous hydroxide; (c) aerating the pulp slurry with an oxygen-containing gas without further addition of alkali and in the absence of alkali for a period of time sufficient to oxidize substantially all of the manganous hydroxide to manganic hydroxide; (d) treating the pulp slurry with sufficient sulfuric acid to lower the slurry pH to at least about 3, thus releasing soluble manganic ions to oxidize the pulp lignins; (e) separating the effluent containing manganous ions from the pulp slurry with a non-alkaline wash; and then (f) extracting the oxidized lignins from the pulp slurry with an alkaline solution.
    • 一种木质纤维素纸浆脱木质素的方法,其包括以下步骤:(a)用具有约1%至约10%(重量)烘干纸浆的锰离子浓度的水溶性二价锰盐浸渍木质纤维素浆液; (b)将浸渍的纸浆浆料与等于作为不溶性氢氧化锰沉淀可溶性二价锰离子所需的碱的化学计量量相同的碱量混合; (c)用含氧气体充气纸浆,而不再进一步添加碱,并且在不存在碱的条件下,足以将基本上所有的氢氧化锰氧化成氢氧化锰的时间; (d)用足够的硫酸处理纸浆,将浆料pH降至至少约3,从而释放可溶性的三价锰离子以氧化纸浆木质素; (e)用非碱性洗涤剂从纸浆中分离出含有二价锰离子的流出物; 然后(f)用碱性溶液从纸浆中提取氧化的木质素。
    • 10. 发明授权
    • Chlorine free process for bleaching lignocellulosic pulp
    • 用于漂白木质纤维素纸浆的无氯工艺
    • US4372812A
    • 1983-02-08
    • US233668
    • 1981-02-11
    • Richard B. PhillipsArthur W. KempfRobert C. Eckert
    • Richard B. PhillipsArthur W. KempfRobert C. Eckert
    • D21C9/10D21C9/16
    • D21C9/1057
    • A chlorine-free bleaching process for lignocellulosic pulp characterized by a series of bleaching stages comprising in sequence a peroxide bleaching stage, the peroxide being selected from the group consisting of alkaline hydrogen peroxide, acidic hydrogen peroxide, and peroxy acid and at least one ozone bleaching stage and in one embodiment the sequence including an initial oxygen bleaching stage before the peroxide bleaching stage. In continuous operation the effluent from each of these sequential stages provides the preferred wash for the preceding washing step and the diluent for the preceding bleaching stage, the final effluent being recyclable for effective closed cycle operation.
    • 一种用于木质纤维素纸浆的无氯漂白方法,其特征在于一系列漂白阶段,其顺序包括过氧化物漂白阶段,所述过氧化物选自碱性过氧化氢,酸性过氧化氢和过氧酸,以及至少一种臭氧漂白 在一个实施方案中,该序列包括在过氧化物漂白阶段之前的初始氧漂白阶段。 在连续操作中,来自每个这些顺序阶段的流出物为先前的洗涤步骤提供了优选的洗涤和用于前一漂白阶段的稀释剂,最终的流出物可循环使用以进行有效的闭环操作。