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    • 1. 发明授权
    • Combination pretreatment/adsorption for treating a liquid stream contaminated with an iodine-containing compound
    • 用于处理受含碘化合物污染的液态物流的组合预处理/吸附
    • US06506935B1
    • 2003-01-14
    • US09905454
    • 2001-07-13
    • Santi KulprathipanjaBipin V. VoraWilliam A. Leet
    • Santi KulprathipanjaBipin V. VoraWilliam A. Leet
    • C07C5142
    • C07B63/00C07C51/47
    • For the removal of trace quantities of iodine-containing contaminants from corrosive liquid feed streams (e.g. commercial acetic acid), an adsorbent with distinct advantages over prior-art materials is provided. The overall treatment method involves the use of a suitable zeolite having a silica to alumina molar ratio from about 5 to less than 15 that has been cation-exchanged with an iodine-reactive metal. This inorganic adsorbent may be used in unbound form, or it can be bound with a substantially insoluble porous inorganic refractory metal oxide binder. Reactivation and regeneration techniques, which are generally incompatible with prior-art adsorbent materials, are also disclosed. In general, it is advantageous to pretreat the feed streams to remove the most easily separable contaminants (e.g. iodine, hydrogen iodide, and metal cations) and thereby reduce the iodine compound loading and detrimental effects of metals on the adsorbent. Thus, the expensive iodine reactive metal (e.g. silver) used in the adsorbent preparation is judiciously used for the removal of trace quantities of iodine-containing species (e.g. alkyl iodides) that are not readily separable by other means.
    • 为了从腐蚀性液体进料流(例如商业乙酸)中除去痕量的含碘污染物,提供了与现有技术材料相比具有明显优点的吸附剂。 总体处理方法包括使用与碘反应性金属进行阳离子交换的具有约5至小于15的二氧化硅与氧化铝摩尔比的合适的沸石。 该无机吸附剂可以以未结合的形式使用,也可以与基本上不溶的多孔无机难熔金属氧化物粘合剂结合。 还公开了通常与现有技术吸附材料不相容的再活化和再生技术。 通常,有利的是预处理进料流以除去最容易分离的污染物(例如碘,碘化氢和金属阳离子),从而降低碘化合物的负载量和金属对吸附剂的不利影响。 因此,在吸附剂制备中使用的昂贵的碘反应性金属(例如银)被明智地用于除去不易通过其它方法分离的痕量的含碘物质(例如烷基碘化物)。
    • 9. 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。
    • 10. 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。