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    • 5. 发明授权
    • Coke inhibitors for pyrolysis furnaces
    • 用于热解炉的焦炭抑制剂
    • US5733438A
    • 1998-03-31
    • US547639
    • 1995-10-24
    • Youdong TongMichael K. PoindexterC. Tom Rowe
    • Youdong TongMichael K. PoindexterC. Tom Rowe
    • C10G9/16
    • C10G9/16Y10S585/95
    • Aromatic compounds in small amounts function as antifoulant additives in pyrolysis furnaces which are subjected to elevated temperatures from about 500.degree. C. to about 1200.degree. C. when thermally convening hydrocarbons to ethylene as well as other useful products. These furnaces produce material that deposits and accumulates upon furnace surfaces including furnace radiant coils and transfer line exchangers. The present antifoulant additives inhibit and suppress the formation and deposition of material on furnace surfaces. The present invention is a method for inhibiting the formation of coke on the surfaces of a radiant heating section of a pyrolysis furnace and the surfaces immediately downstream of such section in contact with a hydrocarbon feedstock which comprises decoking the pyrolysis furnace, and prior to processing the hydrocarbon feedstock, adding an inhibiting compound to the pyrolysis furnace. The inhibiting compound is selected from the group consisting of substituted benzenes, substituted naphthalenes, substituted anthracenes, substituted phenanthrenes, and mixtures thereof wherein the inhibiting compound contains at least one substitutent having at least 2 carbon atoms. A thin catalytically inactive coke layer is formed on the surfaces of the pyrolysis furnace. The hydrocarbon feedstock is then fed into the furnace, whereby the surfaces of the furnace are inhibited against the formation of a catalytically active coke during the processing of the hydrocarbon feedstock.
    • 少量的芳族化合物作为热解炉中的防污添加剂起作用,当将烃转化为乙烯以及其它有用的产物时,它们经历约500℃至约1200℃的升高温度。 这些炉子产生沉积并堆积在炉子表面上的材料,包括炉子辐射线圈和输送管线交换器。 本防污添加剂抑制和抑制材料在炉子表面上的形成和沉积。 本发明是一种抑制在热解炉的辐射加热部分的表面上形成焦炭的方法以及与烃原料接触的这种部分紧邻下游的表面,该方法包括对热解炉进行脱焦,并且在处理之前 烃原料,向热解炉中加入抑制化合物。 抑制化合物选自取代的苯,取代的萘,取代的蒽,取代的菲及其混合物,其中抑制化合物含有至少一个具有至少2个碳原子的取代基。 在热解炉的表面上形成薄的催化非活性焦炭层。 然后将烃原料进料到炉中,由此在烃原料的加工期间,炉的表面被抑制以防止催化活性焦炭的形成。
    • 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。