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    • 2. 发明授权
    • Process for bleaching lignocellulosic matter
    • 漂白木质纤维素物质的方法
    • US4812206A
    • 1989-03-14
    • US99762
    • 1987-09-22
    • Michel DevicRobert Angelier
    • Michel DevicRobert Angelier
    • D21C9/00D21B1/16D21C3/22D21C9/02D21C9/10D21C9/16D21C3/26D21C3/00
    • D21C9/1057
    • A process for bleaching a lignocellulosic matter in the form of a mechanical, thermomechanical, chemicomechanical or chemicothermomechanical papermaking pulp, or of wood chips while being converted into one of these pulp types by processing in a machine consisting essentially of two interpenetrating spiral surfaces wound around parallel shafts driven in synchronous rotation in the same direction inside a barrel which encloses them, and determining between upstream and downstream in the direction of forward travel of the matter a series of zones for drawing and braking the matter, which comprises combining a bleaching treatment using a reducing agent and a bleaching treatment using an oxidizing agent, characterized in that, after pretreatment using at least one metal-complexing or sequestering agent, the lignocellulosic matter undergoes a washing operation with an efficiency greater than 96% before undergoing in succession a bleaching treatment using a reducing agent at a pH of between about 8 and 12, a washing operation to remove the reducing agent and a bleaching treatment using an oxidizing agent.
    • 一种在机械,机械机械,化学机械或化学机械造纸纸浆或木屑的形式中漂白木质纤维素物质的方法,同时通过在基本上由围绕平行缠绕的两个互穿螺旋表面的机器中加工而转化成这些纸浆类型之一 在围绕它们的桶内以相同的方向同步旋转驱动的轴,以及在物体的向前行进方向上的上游和下游之间确定一系列用于拉制和制动该物质的区域,其包括将使用 还原剂和使用氧化剂的漂白处理,其特征在于,在使用至少一种金属络合或螯合剂进行预处理之后,所述木质纤维素物质经历洗涤操作,其效率大于96%,然后连续进行漂白处理,使用 在pH之间的还原剂 约8和12,用于除去还原剂的洗涤操作和使用氧化剂的漂白处理。
    • 10. 发明申请
    • METHOD FOR PREPARING FLUORINE COMPOUNDS
    • 氟化合物的制备方法
    • US20120136183A1
    • 2012-05-31
    • US13382574
    • 2010-05-21
    • Michel DevicNicolas DoucetLaurent WendlingerGeraldine CavalliniPierre-Marie SedatKarine Avril
    • Michel DevicNicolas DoucetLaurent WendlingerGeraldine CavalliniPierre-Marie SedatKarine Avril
    • C07C17/25C07C17/383
    • C07C17/25C07C17/354C07C21/18C07C19/08
    • The invention relates to a method for preparing fluoropropenes of formula (I) CF3CF═CHR, where R is a hydrogen or a fluorine atom from at least one compound of formula (Ia) CF3CF═CFR, where R has the same meaning as in formula (I), said method including the following steps: (i) hydrogenating at least one compound of formula (Ia) in an adiabatic reactor in the presence of a catalyst with a superstoichiometric amount of hydrogen so as to produce a hydrofluoropropane; (ii) partially condensing the flow from the adiabatic reactor of step (i) so as to produce a gaseous phase fraction, including unreacted hydrogen and a portion of the formed hydrofluoropropane, which is recirculated to step (i), and a liquid phase fraction including the residue of the hydrofluoropropane; (iii) dehydrofluorinating hydrofluoropropane from the liquid fraction of step (ii) using potassium hydroxide in an aqueous reaction medium contained in an agitated reactor so as to produce the fluoropropene of formula (I); and (iv) purifying the fluoropropene obtained in step (iii).
    • 本发明涉及一种制备式(I)CF 3 CF = CHR的氟丙烯的方法,其中R是至少一种式(Ia)CF 3 CF = CFR的化合物的氢或氟原子,其中R的定义与式 (I),所述方法包括以下步骤:(i)在具有超化学计量的氢的催化剂存在下,在绝热反应器中氢化至少一种式(Ia)化合物以产生氢氟丙烷; (ii)部分冷凝来自步骤(i)的绝热反应器的流,以便产生气相馏分,包括未反应的氢气和一部分所形成的氢氟丙烷,其循环至步骤(i),以及液相馏分 包括氢氟丙烷的残留物; (iii)使用氢氧化钾在搅拌反应器中的含水反应介质中,从步骤(ii)的液体馏分中脱氢氟化氢氟丙烷,以制备式(I)的氟丙烯; 和(iv)纯化步骤(iii)中获得的氟丙烯。