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    • 2. 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。
    • 7. 发明授权
    • Process for synthesizing allyl carbonates of polyhydric alcohols and
their derivatives
    • 合成多元醇及其衍生物的碳酸烯丙酯的方法
    • US4508656A
    • 1985-04-02
    • US374331
    • 1982-05-03
    • Ugo RomanoGiuseppe Iori
    • Ugo RomanoGiuseppe Iori
    • C07C69/96C07C68/06C08F18/00
    • C07C68/06
    • The application relates to a process for synthesizing carbonic allyl esters from polyhydric alcohols, which are reacted with diallyl carbonate in the presence of a basic catalyst, which can be chosen from sodium hydroxide, sodium carbonate, sodium alcoholate, organic bases or basic ion exchange resins.The final products obtained differ according to the ratio of the components of the starting mixture. Thus, in the case of diols with a diallyl carbonate/diol ratio greater than or equal to 10, the resultant product is constituted by the bis allyl carbonate of the diol together with a quantity of less than or equal to 10% of oligomers represented mainly by dimers. If the ratio is less than 10, the percentage of oligomers rises until, in the case of an approximately stoichiometric ratio, it reaches a value close to 70% of the reaction product.
    • 本申请涉及在碱性催化剂存在下与多烯醇合成碳酸烯丙酯的方法,该碱性催化剂可以选自氢氧化钠,碳酸钠,醇钠,有机碱或碱式离子交换树脂 。 获得的最终产品根据起始混合物的组分的比例而不同。 因此,在二烯丙基碳酸酯/二醇比大于或等于10的二醇的情况下,所得产物由二醇的双碳酸烯丙酯和少于或等于10%的主要代表的低聚物的量构成 二聚体。 如果该比例小于10,则低聚物的百分数上升直到在大约化学计量比的情况下达到接近70%反应产物的值。