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    • 17. 发明授权
    • Methods for restoring the heat transfer coefficient of an oligomerization reactor
    • 恢复低聚反应器传热系数的方法
    • US06380451B1
    • 2002-04-30
    • US09474306
    • 1999-12-29
    • Bruce E. KreischerWarren M. EwertRonald D. Knudsen
    • Bruce E. KreischerWarren M. EwertRonald D. Knudsen
    • C07C208
    • B08B9/08B01J19/002B01J2219/00252C07C2/08Y02P20/52Y02P20/582Y10S585/95
    • The specification discloses a method for cleaning an oligomerization reactor after making a higher olefin in the reactor. An olefin is reacted in the presence of a catalyst comprising an aluminum alkyl to form an olefin reaction product. For example, ethylene can be trimerized in the reaction to produce 1-hexene. The reaction also causes a co-product residue of the catalyst to form on the interior surface of the reactor. The interior surface of the reactor is then contacted with an alcohol under conditions effective to remove at least a substantial amount of the catalyst residue from the interior surface of the reactor. The catalyst-removing step can be carried out by combining an alcohol with the process medium used in the reactor. The combined medium can be used to remove both the accumulated polymer co-product and the accumulated catalyst residue from the reactor.
    • 该说明书公开了在反应器中制备高级烯烃之后清洗低聚反应器的方法。 烯烃在包含烷基铝的催化剂的存在下反应以形成烯烃反应产物。 例如,乙烯可以在反应中进行三聚,以产生1-己烯。 该反应还导致催化剂的副产物残余物在反应器的内表面上形成。 然后在有效地从反应器的内表面除去至少大量催化剂残余物的条件下,将反应器的内表面与醇接触。 催化剂除去步骤可以通过将醇与反应器中使用的加工介质结合来进行。 组合的介质可用于从反应器中除去累积的聚合物共同产物和累积的催化剂残余物。
    • 18. 发明授权
    • Process and apparatus for recovering diluent, monomer, and comonomer
from a polymerization reactor effluent
    • 用于从聚合反应器流出物回收稀释剂,单体和共聚单体的方法和设备
    • US6045661A
    • 2000-04-04
    • US82398
    • 1998-05-20
    • Bruce E. KreischerDonald W. VerserJames E. Hein
    • Bruce E. KreischerDonald W. VerserJames E. Hein
    • B01D3/06B01D3/14C08F6/00
    • C08F6/003B01D3/06B01D3/146
    • A process and apparatus are provided for recovering diluent, unreacted monomer, and unreacted comonomer from a polymerization reactor effluent. The comonomer has a boiling point higher than the boiling point of the monomer and the diluent has a boiling point between the boiling points of the monomer and comonomer. The process and apparatus employ at least one flash tank, a first fractionation stage including a first column and operating at a first fractionation pressure, and a second fraction stage including a second column and operating at a higher second fractionation pressure. Comonomer is withdrawn from the first column as a fractionation product, and overhead vapor containing diluent and monomer is substantially condensed to yield a substantially condensed overhead stream. Liquid and vapor from the stream are separated in an accumulator. Vapor and liquid from the accumulator are compressed and pumped, respectively, for delivery to the second fractionation stage at approximately the second fractionation pressure. The pumped liquid is a major portion by weight of the total flow of pumped liquid and compressed vapor to the second fractionation stage. Diluent and monomer are withdrawn from the second column as fractionation products.
    • 提供了从聚合反应器流出物中回收稀释剂,未反应单体和未反应的共聚单体的方法和装置。 共聚单体的沸点高于单体的沸点,稀释剂的沸点在单体和共聚单体的沸点之间。 该方法和装置使用至少一个闪蒸罐,包括第一塔并在第一分馏压力下操作的第一分馏阶段和包含第二塔并在较高的第二分馏压力下运行的第二馏分级。 共聚单体作为分馏产物从第一塔排出,并且含有稀释剂和单体的塔顶蒸气基本上冷凝以产生基本上冷凝的塔顶馏出物流。 来自流的液体和蒸汽在蓄液器中分离。 来自蓄能器的蒸汽和液体分别被压缩和泵送,以在大约第二分馏压力下输送到第二分馏级。 泵送的液体是泵送液体和压缩蒸气到第二分馏级的总流量的主要部分。 稀释剂和单体作为分馏产物从第二塔排出。