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    • 2. 发明授权
    • Preparation of organic polysulfide polymers using heavy residues from
vinylchloride manufacture
    • 使用氯乙烯重质残留物制备有机多硫化物聚合物
    • US4025495A
    • 1977-05-24
    • US593385
    • 1975-07-07
    • Fernand PeertsYvon DeLaunois
    • Fernand PeertsYvon DeLaunois
    • C08G75/00C08G75/14C08G75/16
    • C08G75/16
    • A process for abating a waste disposal problem in the manufacture of vinyl chloride wherein 1,2 dichlorethane is an intermediate and a heavy residue is recovered as still bottoms, said process comprising reacting said heavy residue at 50.degree. to 100.degree. C., in aqueous medium with an alkali metal or an alkaline earth metal polysulfide, the proportion of polysulfide being equal at least to 30% by weight of the molar theoretical quantity, the average sulfur rank of polysulfide being more than 1 and up to and including 5, the pH of the reaction medium not exceeding 10.5 when the reaction is completed, and the obtained precipitate being separated from the reaction mother liquor, said precipitate being valuable organic polysulfide polymers containing 4-80% by weight of sulfur.
    • 一种减轻制造氯乙烯中的废物处理问题的方法,其中1,2-二氯乙烷是中间体,重残余物作为塔底馏出物回收,所述方法包括使所述重质残余物在50-100℃,水溶液 具有碱金属或碱土金属多硫化物的介质,多硫化物的比例等于摩尔理论量的至少30重量%,多硫化物的平均硫等级大于1且高达并包括5,pH 的反应介质在反应完成后不超过10.5,所得沉淀物与反应母液分离,所述沉淀物是含有4-80重量%硫的有价值的有机多硫化物聚合物。
    • 4. 发明授权
    • Preparation of organic polysulfide polymers using heavy residues from
vinylchloride manufacture
    • 使用氯乙烯重质残留物制备有机多硫化物聚合物
    • US4102874A
    • 1978-07-25
    • US795600
    • 1977-05-10
    • Fernand PeertsYvon Delaunois
    • Fernand PeertsYvon Delaunois
    • C08G75/16
    • C08G75/16
    • In the abatement of a waste disposal problem in the manufacture of vinyl chloride wherein 1,2 dichloroethane is an intermediate and a heavy residue is recovered as still bottoms, from the purification by distillation of dichloroethane and/or vinyl chloride having an organic-origin chloride content ranging between 55 and 80% by weight, wherein said heavy residue is reacted at 50.degree. to 100.degree. C., in aqueous medium with an alkali metal or an alkaline earth metal polysulfide, the proportion of polysulfide being equal at least to 30% by weight of the molar theoretical quantity, the average sulfur rank of polysulfide being more than 1 and up to and including 5, the pH of the reaction medium not exceeding 10.5 when the reaction is completed, and the obtained precipitate is separated from the reaction mother liquor, said precipitate being organic polysulfide polymers containing 4-80% by weight of sulfur, the improvement of using intermediate steps prior to the separation of the precipitate from the mother liquor of:(a) at the end of the reaction, adding an additional quantity of heavy residue amounting to 10-80% by weight of the quantity of the initially added heavy residue; and(b) acidifying the reaction medium to coagulate the resultant polymer precipitate.
    • 在氯乙烯的制造中减少废物处理问题,其中1,2-二氯乙烷是中间体,重残余物作为塔底馏出物回收,通过蒸馏二氯乙烷和/或具有有机原料氯化物的氯乙烯的纯化 含量范围为55-80重量%,其中所述重质残余物在50-100℃下在水性介质中与碱金属或碱土金属多硫化物反应,多硫化物的比例等于至少30% 的摩尔理论量,多硫化物的平均硫等级大于1且至多且包括5,当反应完成时,反应介质的pH不超过10.5,并将所得沉淀物与反应母料分离 所述沉淀物是含有4-80重量%硫的有机多硫化物聚合物,在分离沉淀物f之前使用中间步骤的改进 罗马母酒: