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    • 3. 发明授权
    • Process for the production of hydrogen peroxide
    • 过氧化氢生产工艺
    • US07048905B2
    • 2006-05-23
    • US10343323
    • 2001-08-03
    • Giuseppe PaparattoFranco RivettiPietro AndrigoGiordano De AlbertiUgo Romano
    • Giuseppe PaparattoFranco RivettiPietro AndrigoGiordano De AlbertiUgo Romano
    • C01B15/029
    • C01B15/013C01B15/029
    • Process for the production of concentrated aqueous solutions of hydrogen peroxide, comprising the following steps: (a) feeding to a reactor containing a catalyst based on palladium and platinum, heterogeneous and maintained in dispersion in a liquid reaction medium: (i) a liquid stream consisting of an alcohol or a mixture of C1–C3 alcohols or a mixture of said alcohols with water containing at least 50% by weight of alcohol, also containing an acid promoter and a halogenated promoter, the alcohol and optionally all or part of the water contained in the stream being recycled from the subsequent phase d); (ii) a gaseous stream containing hydrogen, oxygen and an inert gas, characterized in that the concentration of the hydrogen is less than 4.5% by volume and the concentration of the oxygen is less than 21% by volume, the complement to 100 being an inert gas; (b) removing from the reactor: (iii) a liquid stream consisting of stream (i) and also containing the hydrogen peroxide and water produced by the reaction, characterized in that the concentration of hydrogen peroxide ranges from 2% to 10% by weight; and (iv) a gaseous stream essentially consisting of non-reacted hydrogen and oxygen and the inert gas, (c) optionally adding to (iii) water in such a quantity so that its content is at least equal to that of the final aqueous solution of hydrogen peroxide; (d) sending the stream deriving from (c) to a system consisting of one or more evaporators or distillation columns from which the following are removed: (v) one or more streams containing all the alcohol and possibly water, which are recycled to (a); (vi) a concentrated aqueous solution of H2O2 at a concentration ranging from 15 to 60% by weight; (vii) optionally a stream containing the water fed in excess in (c).
    • 用于生产浓缩过氧化氢水溶液的方法,包括以下步骤:(a)向包含基于钯和铂的催化剂的反应器进料,在液体反应介质中分散均匀并保持分散体:(i)液体流 由醇或C1-C3醇的混合物或所述醇与含有至少50重量%醇的水的混合物组成,还含有酸促进剂和卤化促进剂,醇和任选的全部或部分水 包含在流中从后续阶段d)循环; (ii)含有氢气,氧气和惰性气体的气流,其特征在于氢气的浓度小于4.5体积%,氧气的浓度小于21体积%,补体为100为 惰性气体 (b)从反应器中除去:(iii)由流(i)组成并且还含有过氧化氢和通过反应产生的水组成的液体流,其特征在于,过氧化氢的浓度为2重量%至10重量% ; 和(iv)基本上由未反应的氢气和氧气以及惰性气体组成的气流,(c)任选地加入(iii)水,使其含量至少等于最终水溶液的含量 的过氧化氢; (d)将从(c)得到的物流送到一个由一个或多个蒸发器或蒸馏塔组成的系统,其中除去以下物质:(v)一个或多个含有所有醇和可能的水的物流,其被再循环到 一个); (vi)浓度为15至60重量%浓度的H 2 O 2的浓缩水溶液; (vii)任选地包含(c)中过量供给的水的流。