Integrated production of ammonia and urea
    11.
    发明授权
    Integrated production of ammonia and urea 失效
    综合生产氨和尿素

    公开(公告)号:US4690812A

    公开(公告)日:1987-09-01

    申请号:US692563

    申请日:1985-01-18

    CPC classification number: C07C273/10

    Abstract: The combined production of ammonia and urea by the reaction of gases containing hydrocarbons with steam is conducted by using a steam reformer, downstream secondary reformer, and shift converter. The ammonia synthesis gas (hydrogen, nitrogen and carbon dioxide) is subjected to a high pressure scrubbing step with a physical solvent, to remove the acid impurities, especially CO.sub.2. The pressure on the loaded solvent is reduced to a first intermediate pressure for degasing of the coabsorbed inerts and then to a second intermediate pressure for removal of the bulk of the absorbed CO.sub.2, which is then used for urea synthesis. To remove residual CO.sub.2, the solvent is stripped with air and the resultant air stream containing the stripped residual CO.sub.2 is fed to the secondary reformer.

    Abstract translation: 通过使用蒸汽重整器,下游次级重整器和换档转换器,通过含有烃与气体的气体的反应将氨和尿素合并生产。 将氨合成气(氢气,氮气和二氧化碳)用物理溶剂进行高压洗涤,除去酸性杂质,特别是二氧化碳。 负载溶剂上的压力降低到第一中间压力,用于对吸附的惰性气体进行脱气,然后降低到第二中间压力,以除去大部分吸收的CO 2,然后将其用于尿素合成。 为了除去残留的CO 2,用空气汽提溶剂,将含有汽提残余CO 2的所得空气流送入二次重整器。

    Separation of CO.sub.2 and H.sub.2 S from hydrogen containing gas
    12.
    发明授权
    Separation of CO.sub.2 and H.sub.2 S from hydrogen containing gas 失效
    从含氢气体中分离CO2和H2S

    公开(公告)号:US4533373A

    公开(公告)日:1985-08-06

    申请号:US500697

    申请日:1983-06-03

    Abstract: For the purification of hydrocarbon-containing, e.g., methane raw gases containing H.sub.2 S and CO.sub.2, the raw gas is dried, and separated by rectification into a hydrocarbon-rich overhead fraction containing some H.sub.2 S and CO.sub.2 and into a bottom fraction consisting essentially of H.sub.2 S and CO.sub.2. The overhead product is freed, in a first scrubbing column, of the acidic components with a physical acting scrubbing medium selective for H.sub.2 S and COS as against CO.sub.2, e.g., polyethylene glycol ether or toluene. The bottom product from the rectification step is vaporized and selectively desulfurized in a second scrubbing column with the same scrubbing medium, and the scrubbed gas from the second scrubbing column is discharged as CO.sub.2 under pressure.

    Abstract translation: 为了纯化含烃,例如含有H 2 S和CO 2的甲烷原料气体,干燥原料气体,并通过精馏分离成含有一些H 2 S和CO 2的富含烃的塔顶馏分,并进入基本上由H 2 S组成的塔底馏分和 二氧化碳。 在第一个洗涤塔中,塔顶产物在第一个洗涤塔中释放出酸性成分,其中物理作用的洗涤介质可以选择性地用于H2S和COS,例如聚乙二醇醚或甲苯。 来自精馏步骤的底部产物在具有相同洗涤介质的第二洗涤塔中蒸发并选择性脱硫,并且来自第二洗涤塔的洗涤气体在压力下作为CO 2排出。

    Method of treating natural gas to obtain a methane rich fuel gas
    13.
    发明授权
    Method of treating natural gas to obtain a methane rich fuel gas 失效
    处理天然气以获得富含甲烷的燃料气体的方法

    公开(公告)号:US4305733A

    公开(公告)日:1981-12-15

    申请号:US127886

    申请日:1980-03-06

    Abstract: A method for the recovery of a methane-rich natural gas from a natural gas containing, apart from methane, also hydrogen sulfide, carbondioxide, higher hydrocarbons and, in most cases, organosulfur compounds. According to the invention a hydrocarbon fraction of C.sub.4 hydrocarbons and higher is naturally removed from the natural gas which is then subjected to a selective scrubbing for the removal of hydrogen sulfide with a regeneratable extraction, of scrubbing liquid. Next a C.sub.3 fraction is removed, the remaining gas being scrubbed with a second regeneratable washing agent, for the removal of carbondioxide to leave the methane-rich gas.

    Abstract translation: 从除了甲烷以外还含有硫化氢,二氧化碳,高级烃以及大多数情况下含有有机硫化合物的天然气中回收富含甲烷的天然气的方法。 根据本发明,C4烃和更高级的烃馏分天然地从天然气中除去,然后对天然气进行选择性洗涤以用可再生萃取物除去洗涤液。 接下来,除去C3级分,剩下的气体用第二可再生洗涤剂洗涤,用于去除二氧化碳以离开富含甲烷的气体。

    Process for regenerating a scrubbing agent loaded with H.sub.2 S and/or
COS
    14.
    发明授权
    Process for regenerating a scrubbing agent loaded with H.sub.2 S and/or COS 失效
    用于再生装载有H 2 S和/或COS的洗涤剂的方法

    公开(公告)号:US5133954A

    公开(公告)日:1992-07-28

    申请号:US679840

    申请日:1991-04-01

    CPC classification number: C01B17/05 B01D53/1425 B01D53/1456

    Abstract: For regenerating a scrubbing agent loaded with H.sub.2 S and/or COS, as well as optionally with other raw gas components to be recovered, the loaded scrubbing agent is mixed, preferably without prior heating, with an oxidatively acting solvent that is immiscible with the scrubbing agent, and the H.sub.2 S dissolved in the immiscible solvent is converted to elementary sulfur.

    Abstract translation: 为了再生装载有H 2 S和/或COS的洗涤剂以及任选地与待回收的其它原料气体组分一起,将加载的洗涤剂优选不经过预先加热与与洗涤剂不混溶的氧化作用溶剂混合 ,溶解在不混溶溶剂中的H 2 S转化为元素硫。

    Scrubbing of gas to recover light hydrocarbons
    15.
    发明授权
    Scrubbing of gas to recover light hydrocarbons 失效
    清洗气体以回收轻质烃

    公开(公告)号:US4810267A

    公开(公告)日:1989-03-07

    申请号:US871988

    申请日:1986-06-09

    CPC classification number: C07C7/11

    Abstract: For scrubbing C.sub.2+ or C.sub.3+ hydrocarbons from gaseous mixture containing hydrocarbons and/or inerts like H.sub.2 N.sub.2, CO and possibly acid gases, e.g. CO.sub.2 H.sub.2 S, COS e.g. natural gas and the like, the scrubbing medium consists essentially of compounds having one to two rings formed by 5 or 6 carbon atoms, wherein the compounds comprise, in total, at least 9 and at most 17 carbon atoms, and the rings are saturated unsaturated or partially saturated especially alkylated ring compounds of 9 or 10 carbon atoms, e.g. isomeric forms of trimethylbenzene, propylbenzene, propylcyclohexane, tetrahydronaphthalene, decahydronaphthalene.

    Recovery of gaseous components from scrubbing liquid
    17.
    发明授权
    Recovery of gaseous components from scrubbing liquid 失效
    从洗涤液中回收气态组分

    公开(公告)号:US3975172A

    公开(公告)日:1976-08-17

    申请号:US451044

    申请日:1974-03-14

    Applicant: Gerhard Ranke

    Inventor: Gerhard Ranke

    CPC classification number: B01D53/14 B01D53/1418 B01D53/1425 Y02C10/06

    Abstract: Process for the recovery of one or more components of a raw gas, absorbed by the scrubbing liquid during a physical gas scrubbing step, by expanding the laden scrubbing liquid, characterized in that the expanded, laden scrubbing liquid is stripped, before its final regeneration, with a gas consisting exclusively of one or more components of the raw gas and essentially free of the components to be recovered and to be scrubbed out.

    Abstract translation: 用于在物理气体洗涤步骤期间通过膨胀装载的洗涤液体来回收原料气体的一种或多种组分被洗涤液体吸收的方法,其特征在于,在其最终再生之前剥离膨胀的载满洗涤液体, 其中气体仅由原料气体的一种或多种组分组成,并且基本上不含待回收的组分并被洗涤出来。

    Process for obtaining C.sub.2+ or C.sub.3+ hydrocarbons from gaseous
mixtures
    18.
    发明授权
    Process for obtaining C.sub.2+ or C.sub.3+ hydrocarbons from gaseous mixtures 失效
    从气体混合物中获得C2 +或C3 +烃的方法

    公开(公告)号:US4713940A

    公开(公告)日:1987-12-22

    申请号:US927986

    申请日:1986-11-07

    CPC classification number: C07C7/11

    Abstract: A process is disclosed for obtaining C.sub.2+ or C.sub.3+ hydrocarbons from hydrocarbon-containing gaseous mixtures by pressure scrubbing with a physically acting solvent selective for C.sub.2+ and, respectively, C.sub.3+ hydrocarbons. The solvent, after loading, is regenerated and reused. In order to avoid impurities in the C.sub.2+ and, respectively, C.sub.3+ product in an economical and energy-saving way, the loaded solvent is subjected to expansion to a pressure lying below the critical pressure of the solvent-gas mixture, and to heating and partial evaporation in order to drive off concomitantly dissolved inert gases. The solvent, reduced in its content of inert gases, is then to be passed on to regeneration. The process is advantageous, in particular, in cases where crude gases are to be processed which exhibit a low concentration of components to be scrubbed out.

    Abstract translation: 公开了一种用于通过用对C2 +和分别为C3 +烃选择性的物理作用溶剂的压力洗涤从含烃气体混合物中获得C2 +或C3 +烃的方法。 加载后的溶剂被再生并重复使用。 为了以经济和节能的方式避免C2 +和C3 +产品中的杂质,将负载的溶剂膨胀至低于溶剂 - 气体混合物的临界压力的压力,并加热和部分 蒸发以排除伴随溶解的惰性气体。 然后将其惰性气体含量降低的溶剂传递至再生。 该方法是有利的,特别是在粗制气体被处理的情况下,其表现出低浓度待洗涤的组分。

    Parallel stream heat exchange for separation of ethane and higher
hydrocarbons from a natural or refinery gas
    19.
    发明授权
    Parallel stream heat exchange for separation of ethane and higher hydrocarbons from a natural or refinery gas 失效
    用于从天然或炼厂气体分离乙烷和高级烃的平行流热交换

    公开(公告)号:US4592766A

    公开(公告)日:1986-06-03

    申请号:US650016

    申请日:1984-09-13

    Abstract: For the separation of ethane and higher hydrocarbons from a high pressure incoming gas containing hydrocarbons, the raw gas is cooled and expanded in several stages and the condensates that are produced are fed to a rectifying column to provide an overhead gaseous product essentially consisting of methane and a bottoms product consisting essentially of ethane and higher hydrocarbons. To save energy, the raw gas and/or the product streams are heat exchanged in parallel streams under different pressures, the cooled high-pressure gas is work-expanded and the condensates produced by cooling and expansion are fed separately to the rectifying column.

    Abstract translation: 为了从含有烃的高压进入气体中分离乙烷和高级烃,将原料气体在几个阶段中冷却和膨胀,并将生产的冷凝物加入到精馏塔中以提供基本上由甲烷和 基本上由乙烷和高级烃组成的底部产物。 为了节省能源,原料气体和/或产物流在不同压力下以平行流进行热交换,冷却的高压气体被工作膨胀,并且通过冷却和膨胀产生的冷凝物分别供给到精馏塔。

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