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    • 2. 发明授权
    • Process for the production of alkylaromatic hydrocarbons using solid
catalysts
    • 使用固体催化剂生产烷基芳烃的方法
    • US5012021A
    • 1991-04-30
    • US584214
    • 1990-09-18
    • Bipin V. VoraPaul R. Cottrell
    • Bipin V. VoraPaul R. Cottrell
    • C07C15/107
    • C07C15/107Y02P20/582
    • An improved process for the production of alkylaromatic hydrocarbons is disclosed. Paraffinic hydrocarbons are dehydrogenated to yield an olefin-containing stream, which is later charged to an alkylation zone for reaction with an aromatic hydrocarbon in the presence of a solid alkylation catalyst. The olefin-containing stream is first passed through a selective hydrogenation zone in which diolefins are converted to monoolefins by contact with a selective catalyst. This increases the yield and the quality of the product alkylate by greatly reducing the production of biphenyl compounds and oligomers in the alkylation zone. Process efficiency is improved by passing unconverted paraffinic and monoolefinic hydrocarbons from the alkylation zone through another hydrogenation zone for the saturation of monoolefinic hydrocarbons and recycling the saturated stream to the dehydrogenation zone. The use of a solid alkylation catalyst can also allow the selective hydrogenation zone to be located downstream of the stripper for the dehydrogenation zone so that the effluent from the selective hydrogenation zone discharges directly into the alkylation zone.
    • 公开了一种生产烷基芳族烃的改进方法。 将烷烃烃脱氢以产生含烯烃的物流,随后将其装入烷基化区以在固体烷基化催化剂存在下与芳烃反应。 首先将含烯烃的物流通过选择性氢化区,其中通过与选择性催化剂接触将二烯烃转化为单烯烃。 这通过大大降低烷基化区中联苯化合物和低聚物的产生而提高了烷基化产物的产率和质量。 通过使来自烷基化区的未转化的链烷烃和单烯烃通过另一氢化区用于饱和单烯烃并且将饱和流再循环到脱氢区来提高工艺效率。 使用固体烷基化催化剂还可以使选择氢化区位于脱氢区的汽提塔的下游,使得来自选择氢化区的流出物直接排放到烷基化区。
    • 7. 发明授权
    • Process for removing polymeric by-products from acetylene hydrogenation
product
    • 从乙炔氢化产物中除去聚合物副产物的方法
    • US6015933A
    • 2000-01-18
    • US115481
    • 1998-07-15
    • Hayim AbrevayaBipin V. Vora
    • Hayim AbrevayaBipin V. Vora
    • C07C7/00C07C7/10
    • C07C7/005C07C7/10
    • A process to remove polymeric by-products from the product of an acetylene selective hydrogenation reactor has been developed. The product is generated by introducing hydrogen and a liquid hydrocarbon stream containing largely butadiene and some acetylenes to a reactor containing a catalyst effective for the selective hydrogenation of acetylenes. The product contains at least hydrogen, butadiene, and polymeric by-products. The pressure of the product is reduced and the product cooled. The cooled product is conducted to a low pressure flash drum to produce a hydrogen enriched stream and a butadiene and polymeric by-product-enriched stream. The hydrogen-enriched stream is removed. The butadiene and polymeric by-product is passed to a knockout drum to produce a stream enriched in butadiene and polymeric by-products having less than about 12 carbon atoms and a stream enriched in polymeric by-products having about 12 or more carbon atoms. The stream enriched in polymeric by-products having about 12 or more carbon atoms is removed from the process. Polymeric by-products containing less than about 12 carbon atoms may be removed from the remaining stream by conducting a solvent and the stream enriched in butadiene and polymeric by-products containing less than about 12 carbon atoms to an extractive distillation column. In the extractive distillation column, the butadiene and polymeric by-products containing less than about 12 carbon atoms are carried with the solvent and removed in a bottoms stream as an extract mixture while the butanes and butenes are removed in an extractive distillation overhead stream. The bottoms extract stream is conducted to a stripper column where the solvent and the polymeric by-products are separated from the butadiene.
    • 已经开发了从乙炔选择性氢化反应器的产物中除去聚合物副产物的方法。 该产物通过将含有大量丁二烯和一些乙炔的氢气和液体烃流引入含有对乙炔的选择性氢化有效的催化剂的反应器而产生。 该产品至少含有氢,丁二烯和聚合副产物。 产品的压力降低,产品冷却。 冷却的产物被传导到低压闪蒸鼓以产生富氢流和丁二烯和聚合副产物富集流。 除去富氢流。 丁二烯和聚合副产物被传送到分离鼓中以产生富含丁二烯的流和具有小于约12个碳原子的聚合副产物和富含约12个或更多个碳原子的聚合副产物的物流。 从该方法中除去富含约12个或更多个碳原子的聚合副产物的物流。 含有少于约12个碳原子的聚合副产物可以通过将富含丁二烯的溶剂和含有少于约12个碳原子的聚合副产物的物流引入萃取蒸馏塔从剩余物流中除去。 在萃取蒸馏塔中,含有少于约12个碳原子的丁二烯和聚合副产物与溶剂一起携带并在塔底物流中作为提取物混合物除去,同时在萃取蒸馏塔顶馏出物中除去丁烷和丁烯。 将塔底提取物流引入汽提塔,其中溶剂和聚合副产物与丁二烯分离。
    • 9. 发明授权
    • Process for producing light olefins
    • 轻质烯烃的生产工艺
    • US5990369A
    • 1999-11-23
    • US21044
    • 1998-02-09
    • Paul T. BargerR. Joe LawsonBipin V. Vora
    • Paul T. BargerR. Joe LawsonBipin V. Vora
    • C07C11/02C07C1/20C07C2/00C07C5/23
    • C07C11/02C07C2529/85Y02P20/127
    • The present invention relates to a process for the production of light olefins comprising olefins having from 2 to 4 carbon atoms per molecule from an oxygenate feedstock. The process comprises passing the oxygenate feedstock to an oxygenate conversion zone containing a metal alumninophosphate catalyst to produce a light olefin stream. The light olefin stream is fractionated and a portion of the products are metathesized to enhance the yield of the ethylene, propylene, and/or butylene products. Propylene can be metathesized to produce more ethylene, or a combination of ethylene and butene can be metathesized to produce more propylene. This combination of light olefin production and metathesis, or disproportionation provides flexibility to overcome the equilibrium limitations of the metal aluminophosphate catalyst in the oxygenate conversion zone. In addition, the invention provides the advantage of extended catalyst life and greater catalyst stability in the oxygenate conversion zone.
    • 本发明涉及一种用于生产轻质烯烃的方法,其包含每分子含有2至4个碳原子的含氧原料。 该方法包括使含氧化合物原料通入含有金属氨基磷酸盐催化剂的含氧化合物转化区以产生轻质烯烃流。 将轻质烯烃流分馏,并将一部分产物复分解,以提高乙烯,丙烯和/或丁烯产物的产率。 丙烯可以被复分解以产生更多的乙烯,或者乙烯和丁烯的组合可以被复分解以产生更多的丙烯。 轻烯烃生产和复分解的组合或歧化提供了克服金属磷酸铝催化剂在含氧化合物转化区中的平衡限制的灵活性。 此外,本发明提供了在含氧化合物转化区中延长的催化剂寿命和更大的催化剂稳定性的优点。
    • 10. 发明授权
    • Process for the dehydrogenation of paraffinic hydrocarbons
    • 石蜡烃脱氢方法
    • US5689029A
    • 1997-11-18
    • US579112
    • 1995-12-27
    • Bipin V. VoraTamotsu Imai
    • Bipin V. VoraTamotsu Imai
    • C07C5/32C07C5/333
    • C07C5/321C07C5/333
    • An improved process for the catalytic dehydrogenation of paraffinic hydrocarbons is disclosed. Feed paraffinic hydrocarbons are dehydrogenated by means of contacting the dehydrogenatable hydrocarbon with a dehydrogenation catalyst in a first dehydrogenation zone wherein the endothermic dehydrogenation reaction reduces the temperature of the resulting hydrocarbon stream containing dehydrogenated hydrocarbon compounds. The resulting effluent from the preceding dehydrogenation zone is then contacted with a hot hydrogen-rich gaseous stream having a temperature greater than the hydrocarbon stream to increase the temperature of the hydrocarbon stream and then the resulting heated stream is introduced into a subsequent dehydrogenation zone to produce additional dehydrogenated hydrocarbon compounds.
    • 公开了一种用于链烷烃的催化脱氢的改进方法。 通过在第一脱氢区中使可脱氢烃与脱氢催化剂接触来进料链烷烃脱氢,其中吸热脱氢反应降低了所得含有脱氢烃化合物的烃流的温度。 然后将来自先前脱氢区的所得流出物与具有大于烃流的温度的热富氢气流接触以增加烃流的温度,然后将所得加热的流引入随后的脱氢区中以产生 额外的脱氢烃化合物。