Method for inhibiting hydrate formation
    1.
    发明授权
    Method for inhibiting hydrate formation 失效
    抑制水合物形成的方法

    公开(公告)号:US6028233A

    公开(公告)日:2000-02-22

    申请号:US624277

    申请日:1996-03-28

    摘要: A method for inhibiting the formation of clathrate hydrates in a fluid having hydrate forming constituents is claimed. More specifically, the method can be used in treating a petroleum fluid stream such as natural gas conveyed in a pipe to inhibit the formation of a hydrate restriction in the pipe. The hydrate inhibitors used for practicing the method comprise substantially water soluble polymers having N-vinyl amide or N-allyl amide units. Specific examples of such copolymers include, N-vinyl-N-methylacetamide (VIMA) copolymerized with acryloylpyrrolidine (APYD) or acryloylpiperidine (APID), and more preferably, VIMA copolymerized with N-substituted methacrylamides, such as N-isopropylmethacrylamide (iPMAM) and methacryloylpyrrolidine (MAPYD) to produce inhibitors for practicing the claimed method.

    摘要翻译: 要求保护在具有水合物形成成分的流体中形成笼形水合物的方法。 更具体地说,该方法可用于处理在管道中输送的天然气等石油流体流,以抑制管道中的水合物限制。 用于实施该方法的水合物抑制剂包括基本上具有N-乙烯基酰胺或N-烯丙基酰胺单元的水溶性聚合物。 这种共聚物的具体实例包括与丙烯酰基吡咯烷(APYD)或丙烯酰基哌啶(APID)共聚的N-乙烯基-N-甲基乙酰胺(VIMA),更优选与N-取代的甲基丙烯酰胺如N-异丙基甲基丙烯酰胺(iPMAM)共聚的VIMA和 甲基丙烯酰基吡咯烷(MAPYD)以产生用于实施所要求保护的方法的抑制剂。

    Maleimide copolymers and method for inhibiting hydrate formation
    2.
    发明授权
    Maleimide copolymers and method for inhibiting hydrate formation 失效
    马来酰亚胺共聚物和抑制水合物形成的方法

    公开(公告)号:US5744665A

    公开(公告)日:1998-04-28

    申请号:US659550

    申请日:1996-06-06

    摘要: Novel maleimide copolymers have at least two monomeric units, a maleimide unit and a vinyl unit having a pendant group, the pendant group having two to twenty-one carbon atoms, at least one nitrogen atom and at least one oxygen atom. The copolymer has an average molecular weight between about 1,000 and about 6,000,000. Preferred maleimide copolymers include acrylamide/maleimide copolymers, N-vinyl amide/maleimide copolymers, vinyl lactam/maleimide copolymers, alkenyl cyclic imino ether/maleimide copolymers, and acryloylamide/maleimide copolymers. The substantially water soluble maleimide copolymers are useful for inhibiting the formation of clathrate hydrates in a fluid having hydrate-forming constituents by reducing the rate of nucleation, growth, and/or agglomeration of gas hydrate crystals in a petroleum fluid stream, thereby inhibiting the formation of a hydrate blockage in the pipe conveying the petroleum fluid stream. The inhibitor can be used conveniently at low concentrations, for example in the range of from about 0.01% to about 5% by weight of the water present in the oil or gas stream, to effectively treat a petroleum fluid having a water phase.

    摘要翻译: 新型马来酰亚胺共聚物具有至少两个单体单元,马来酰亚胺单元和具有侧基的乙烯基单元,侧基具有2至21个碳原子,至少一个氮原子和至少一个氧原子。 共聚物的平均分子量为约1,000至约6,000,000。 优选的马来酰亚胺共聚物包括丙烯酰胺/马来酰亚胺共聚物,N-乙烯基酰胺/马来酰亚胺共聚物,乙烯基内酰胺/马来酰亚胺共聚物,烯基环亚氨基醚/马来酰亚胺共聚物和丙烯酰胺/马来酰亚胺共聚物。 基本上水溶性的马来酰亚胺共聚物可用于通过降低石油流体物流中气体水合物晶体的成核,生长和/或附聚的速率来抑制在具有水合物形成成分的流体中形成笼形水合物,由此抑制形成 在输送石油流体的管道中存在水合物堵塞。 抑制剂可以以低浓度方便地使用,例如在油或气流中存在的水的约0.01重量%至约5重量%的范围内,以有效地处理具有水相的石油流体。

    Method for inhibiting hydrate formation using maleimide copolymers
    3.
    发明授权
    Method for inhibiting hydrate formation using maleimide copolymers 失效
    使用马来酰亚胺共聚物抑制水合物形成的方法

    公开(公告)号:US5936040A

    公开(公告)日:1999-08-10

    申请号:US976438

    申请日:1997-11-21

    CPC分类号: F17D1/05 C10L3/06 C09K2208/22

    摘要: Novel maleimide copolymers have at least two monomeric units, a maleimide unit and a vinyl unit having a pendant group, the pendant group having two to twenty-one carbon atoms, at least one nitrogen atom and at least one oxygen atom. The copolymer has an average molecular weight between about 1,000 and about 6,000,000. Preferred maleimide copolymers include acrylamide/maleimide copolymers, N-vinyl amide/maleimide copolymers, vinyl lactam/maleimide copolymers, alkenyl cyclic imino ether/maleimide copolymers, and acryloylamide/maleimide copolymers. The substantially water soluble maleimide copolymers are useful for inhibiting the formation of clathrate hydrates in a fluid having hydrate-forming constituents by reducing the rate of nucleation, growth, and/or agglomeration of gas hydrate crystals in a petroleum fluid stream, thereby inhibiting the formation of a hydrate blockage in the pipe conveying the petroleum fluid stream. The inhibitor can be used conveniently at low concentrations, for example in the range of from about 0.01% to about 5% by weight of the water present in the oil or gas stream, to effectively treat a petroleum fluid having a water phase.

    摘要翻译: 新型马来酰亚胺共聚物具有至少两个单体单元,马来酰亚胺单元和具有侧基的乙烯基单元,侧基具有2至21个碳原子,至少一个氮原子和至少一个氧原子。 共聚物的平均分子量为约1,000至约6,000,000。 优选的马来酰亚胺共聚物包括丙烯酰胺/马来酰亚胺共聚物,N-乙烯基酰胺/马来酰亚胺共聚物,乙烯基内酰胺/马来酰亚胺共聚物,烯基环亚氨基醚/马来酰亚胺共聚物和丙烯酰胺/马来酰亚胺共聚物。 基本上水溶性的马来酰亚胺共聚物可用于通过降低石油流体物流中气体水合物晶体的成核,生长和/或附聚的速率来抑制在具有水合物形成成分的流体中形成笼形水合物,由此抑制形成 在输送石油流体的管道中存在水合物堵塞。 抑制剂可以以低浓度方便地使用,例如在油或气流中存在的水的约0.01重量%至约5重量%的范围内,以有效地处理具有水相的石油流体。

    Production of elastomeric functionalized olefin polymers
    4.
    发明申请
    Production of elastomeric functionalized olefin polymers 有权
    弹性体官能化烯烃聚合物的生产

    公开(公告)号:US20090062475A1

    公开(公告)日:2009-03-05

    申请号:US12231384

    申请日:2008-09-02

    摘要: In a process for producing a functionalized polyalkenamer, at least one monomer comprising a monocyclic olefin having at least one pendant alkyl group bonded thereto, wherein the pendant alkyl group has at least two carbon atoms and is substituted with a polar moiety spaced by at least one carbon atom from the monocyclic olefin, is contacted with a polymerization catalyst under conditions effective to effect ring opening polymerization of the monocyclic olefin and produce the functionalized polyalkenamer.

    摘要翻译: 在制备官能化的聚链烯聚合物的方法中,至少一种包含具有至少一个与其键合的侧链烷基的单环烯烃的单体,其中所述侧基烷基具有至少两个碳原子并且被极性部分取代,所述极性部分被至少一个 来自单环烯烃的碳原子在有效地实现单环烯烃的开环聚合的条件下与聚合催化剂接触并产生官能化的聚链烷醇。

    Production of elastomeric functionalized olefin polymers
    6.
    发明授权
    Production of elastomeric functionalized olefin polymers 有权
    弹性体官能化烯烃聚合物的生产

    公开(公告)号:US08263712B2

    公开(公告)日:2012-09-11

    申请号:US12231384

    申请日:2008-09-02

    摘要: In a process for producing a functionalized polyalkenamer, at least one monomer comprising a monocyclic olefin having at least one pendant alkyl group bonded thereto, wherein the pendant alkyl group has at least two carbon atoms and is substituted with a polar moiety spaced by at least one carbon atom from the monocyclic olefin, is contacted with a polymerization catalyst under conditions effective to effect ring opening polymerization of the monocyclic olefin and produce the functionalized polyalkenamer.

    摘要翻译: 在制备官能化的聚链烯聚合物的方法中,至少一种包含具有至少一个与其键合的侧链烷基的单环烯烃的单体,其中所述侧基烷基具有至少两个碳原子并且被极性部分取代,所述极性部分被至少一个 来自单环烯烃的碳原子在有效地实现单环烯烃的开环聚合的条件下与聚合催化剂接触并产生官能化的聚链烷醇。

    Ethylene/dicyclopentadiene copolymers and functionalized derivatives thereof
    8.
    发明申请
    Ethylene/dicyclopentadiene copolymers and functionalized derivatives thereof 有权
    乙烯/二环戊二烯共聚物及其官能化衍生物

    公开(公告)号:US20080015314A1

    公开(公告)日:2008-01-17

    申请号:US11801633

    申请日:2007-05-10

    IPC分类号: C08L45/00

    摘要: Disclosed is a selected type of copolymer composition comprising copolymers having units derived from ethylene and dicyclopentadiene (DCPD) co-monomers. Such copolymer compositions: a) have a DCPD-derived comonomer unit content of from about 25 mole % to about 45 mole %; b) have a Weight Average Molecular Weight, Mw, of greater than about 170,000; c) comprise amorphous material and have glass transition temperatures, Tg, of from about 8° C. to about 129° C., which also fit the equation Tg (in ° C.)≧[(mole % DCPD×3.142)−4.67]; and d) comprise no significant amount of crystalline polyethylene homopolymer or crystallizable polyethylene segments within the ethylene-dicylopentadiene copolymers. Such copolymers can be readily derivatized by hydrogention and/or epoxidation to provide polymeric materials suitable for use as engineering thermoplastics.Also disclosed are processes for preparing and optionally further derivatizing ethylene/dicyclopentadiene copolymers having the characteristics hereinbefore described. Such processes comprise: a) contacting ethylene with a polymerization mixture comprising greater than about 4.0 molar dicyclopentadiene, in the presence of a selected activated cyclopentadienyl-fluorenyl metallocene catalyst bearing a substituent, preferably a methyl substituent, at the 3-position of the cyclopentadienyl ring, under specific polymerization conditions including relatively high ethylene pressures to thereby form the desired ethylene-dicyclopentadiene copolymers within the polymerization mixture. Such copolymers are then recovered and/or further hydrogenated or functionalized.

    摘要翻译: 公开了一种选择类型的共聚物组合物,其包含具有衍生自乙烯和二环戊二烯(DCPD)共聚单体的单元的共聚物。 这种共聚物组合物:a)具有约25摩尔%至约45摩尔%的DCPD衍生的共聚单体单元含量; b)具有大于约170,000的重均分子量,M < c)包含非晶材料,并且具有约8℃至约129℃的玻璃化转变温度,其也适合方程式T(g) (℃)] = [(摩尔%DCPDx 3.142)-4.67]; 和d)在乙烯 - 二茂二烯共聚物内不含有显着量的结晶聚乙烯均聚物或可结晶的聚乙烯链段。 这样的共聚物可以通过水合和/或环氧化来容易地衍生,以提供适合用作工程热塑性塑料的聚合材料。 还公开了制备和任选地进一步衍生具有上述特征的乙烯/二环戊二烯共聚物的方法。 这样的方法包括:a)在选择的活化的环戊二烯基 - 芴基茂金属催化剂存在下,在含有大于约4.0摩尔二环戊二烯的聚合混合物的存在下,使乙烯与环戊二烯基环的3位具有取代基,优选甲基取代基接触 在包括相对较高的乙烯压力的特定聚合条件下,从而在聚合混合物内形成所需的乙烯 - 二环戊二烯共聚物。 然后回收和/或进一步氢化或官能化此类共聚物。

    PRODUCTION OF ELASTOMERIC FUNCTIONALIZED OLEFIN POLYMERS
    10.
    发明申请
    PRODUCTION OF ELASTOMERIC FUNCTIONALIZED OLEFIN POLYMERS 有权
    生产弹性功能烯烃聚合物

    公开(公告)号:US20120322948A1

    公开(公告)日:2012-12-20

    申请号:US13596567

    申请日:2012-08-28

    IPC分类号: C08F20/42 C08F4/80

    摘要: In a process for producing a functionalized polyalkenamer, at least one monomer comprising a monocyclic olefin having at least one pendant alkyl group bonded thereto, wherein the pendant alkyl group has at least two carbon atoms and is substituted with a polar moiety spaced by at least one carbon atom from the monocyclic olefin, is contacted with a polymerization catalyst under conditions effective to effect ring opening polymerization of the monocyclic olefin and produce the functionalized polyalkenamer.

    摘要翻译: 在制备官能化的聚链烯聚合物的方法中,至少一种包含具有至少一个与其键合的侧链烷基的单环烯烃的单体,其中所述侧基烷基具有至少两个碳原子并且被极性部分取代,所述极性部分被至少一个 来自单环烯烃的碳原子在有效地实现单环烯烃的开环聚合的条件下与聚合催化剂接触并产生官能化的聚链烷醇。