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    • 3. 发明授权
    • Non-enolizable oxygenates as antifoulants
    • 不可烯化的含氧化合物作为防污剂
    • US5770041A
    • 1998-06-23
    • US804050
    • 1997-02-21
    • Vincent E. LewisRobert D. McClainMichael K. Poindexter
    • Vincent E. LewisRobert D. McClainMichael K. Poindexter
    • C07C17/42C10G19/02C10G75/04C10G9/16
    • C10G75/04C07C17/42C10G19/02Y10S585/95
    • The invention is a method of inhibiting the formation of fouling deposits occurring on the surface of an alkaline scrubber used to remove acid gases, such as hydrogen sulfide, carbon dioxide and mercaptans, from hydrocarbon streams. These deposits are formed during the scrubbing of pyrolytically produced hydrocarbons contaminated with oxygen-containing compounds with a caustic solution having a pH>7 which comprises adding an effective deposit-inhibiting amount of a non-enolizable carbonyl compound to the caustic solution. The invention is also a method of inhibiting the formation of fouling deposits occurring in spent caustic wash/stripper systems used for hydrocarbon manufacturing processes. Fouling occurs in these systems when they are in contact with hydrocarbon processing streams contaminated with oxygen-containing compounds, such as aldehydes. These deposits are formed in hydrocarbon processing streams contaminated with oxygen-containing compounds while in contact with a caustic solution having a pH>7. The invention comprises adding an effective deposit-inhibiting amount of a non-enolizable carbonyl compound to the caustic solution. Preferred non-enolizable carbonyl compounds are formaldehyde, glyoxal, benzaldehyde, p-anisaldehyde, formic acid, glyoxalic acid and paraformaldehyde.
    • 本发明是一种抑制在用于从烃流中除去酸性气体如硫化氢,二氧化碳和硫醇的碱性洗涤器表面上发生的结垢沉积物形成的方法。 这些沉积物是在用含有氢的化合物污染的热解生成的碳氢化合物的洗涤过程中形成的,所述氢氧化物溶液具有pH> 7的苛性碱溶液,其包括向苛性碱溶液中加入有效的沉积物抑制量的不可烯化的羰基化合物。 本发明还是抑制在用于烃制造过程的废碱洗涤/汽提器系统中发生的结垢沉积物的形成的方法。 当它们与含氧化合物如醛类污染的烃加工流接触时,这些系统中会发生结垢。 这些沉积物在与含氧化合物污染的烃加工流中形成,同时与pH> 7的苛性碱溶液接触。 本发明包括向苛性碱溶液中加入有效的沉积抑制量的非烯醇化羰基化合物。 优选的不可烯化羰基化合物是甲醛,乙二醛,苯甲醛,对茴香醛,甲酸,乙二醛酸和多聚甲醛。
    • 8. 发明授权
    • Fouling prevention in ethylene dichloride distillation units
    • 二氯乙烷蒸馏装置防污
    • US5324393A
    • 1994-06-28
    • US48337
    • 1993-04-15
    • Michael K. Poindexter
    • Michael K. Poindexter
    • C07C17/383C07C17/386C23F11/00C07C17/00C23F14/00
    • C07C17/386C07C17/383
    • A method for preventing fouling of ethylene dichloride distillation units which comprises treating the feed to such unit with a fouling preventing amount of a composition comprising (a) 2-15 weight % of an oil soluble polyacrylate ester or methacrylate ester with alcohol radical of the ester group containing from C.sub.4 -C.sub.22 carbon atoms which contains between 0.1-25 mole % of amino alcohol ester groups; (b) 20-40 weight % a phenylene diamine compound having the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are the same or different and are hydrogen, C.sub.1 -C.sub.20 alkyl, C.sub.1 -C.sub.20 aryl, C.sub.1 -C.sub.20 alkaryl or C.sub.1 -C.sub.20 aralkyl, with the proviso that at least one of R.sub.1, R.sub.2, R.sub.3 or R.sub.4 is hydrogen; and (c) the balance is a heavy aromatic solvent.
    • 一种用于防止二氯乙烯蒸馏单元结垢的方法,其包括用防污垢量的组合物处理进料至该单元,所述组合物包含(a)2-15重量%的油溶性聚丙烯酸酯或甲基丙烯酸酯与酯的醇基 含有0.1-25摩尔%氨基醇酯基的C 4 -C 22碳原子的基团; (b)20-40重量%的具有式“IMAGE”的苯二胺化合物,其中R 1,R 2,R 3和R 4相同或不同,为氢,C 1 -C 20烷基,C 1 -C 20芳基,C 1 -C 20烷芳基 或C 1 -C 20芳烷基,条件是R 1,R 2,R 3或R 4中的至少一个为氢; 和(c)余量为重芳族溶剂。