利索-全球专利检索

  1. Login
  2. Sign Up

Search Results

572 records (took 0.017 seconds)

    Integrated process for converting hydrocarbon gas to liquids
    51.
    发明授权
    Integrated process for converting hydrocarbon gas to liquids 有权

    公开(公告)号：US06248794B1

    公开(公告)日：2001-06-19

    申请号：US09369045

    申请日：1999-08-05

    Applicant: Thomas Gieskes

    Inventor： Thomas Gieskes

    IPC: C07C2700

    CPC classification number: C01C1/0488 ,  C07C1/0485 ,  C07C273/04 ,  C10G2/30 ,  C10L3/06 ,  F25J1/0022 ,  F25J1/0229 ,  F25J1/0242 ,  F25J1/0282 ,  F25J1/0283 ,  F25J3/0209 ,  F25J3/0233 ,  F25J3/0257 ,  F25J3/0266 ,  F25J3/04539 ,  F25J3/04587 ,  F25J3/046 ,  F25J2220/62 ,  F25J2220/64 ,  F25J2220/66 ,  F25J2230/60 ,  F25J2240/70 ,  F25J2240/82 ,  F25J2260/02 ,  F25J2260/20 ,  F25J2260/60 ,  F25J2260/80 ,  Y02C10/12 ,  Y02P20/125 ,  Y02P20/152 ,  Y02P20/52

    Abstract: The present invention is an integrated process for converting light hydrocarbon gas to heavier hydrocarbon liquids. In each embodiment, a Fischer-Tropsch (FT) process comprising a thermal reformer and a reactor containing an FT catalyst is combined with one or more additional processes to achieve operational synergies. In a first embodiment, an FT process is integrated with a cryogenic liquefied natural gas (LNG) process wherein tail gas from the FT reaction is used to drive a refrigeration compressor in the LNG process. The tail gas, optionally supplemented with natural gas, may be fed directly to a gas turbine or may be combusted in steam boiler, which in turn provides steam to a steam turbine. The natural gas may be processed prior to its being fed to the LNG process and the FT process in order to remove any impurities and/or condensate. The process may be further integrated with a fertilizer production process comprising an ammonia synthesis process and a urea synthesis process. To produce ammonia, hydrogen separated from synthesis gas produced in a primary and/or secondary reformer in the FT process is combined with nitrogen produced in the LNG process. Nitrogen may also be supplied to the ammonia synthesis process from an optional air separation process, which also provides oxygen enrichment to the thermal reformer in the FT process. To produce urea, the ammonia is subsequently reacted with carbon dioxide removed during processing of the gas prior to its liquefaction. The integrated FT/LNG/Fertilizer process may be further integrated with a carbon dioxide removal process which separates flue gas from a gas turbine or steam generator driving the refrigeration compressor in the LNG process into nitrogen which is used in the ammonia synthesis process and carbon dioxide which is used in the urea synthesis unit. Alternatively, the FT process may be integrated directly with the fertilizer production process, in the absence of an LNG process. In an alternative embodiment, an FT process is integrated with a methanol synthesis process wherein tail gas from the FT reaction is used to fuel burners in a secondary thermal reformer.

    Process for the synthesis of urea and equipment therefor
    53.
    发明授权
    Process for the synthesis of urea and equipment therefor 有权
    合成尿素及其设备的方法

    公开(公告)号：US6093850A

    公开(公告)日：2000-07-25

    申请号：US269164

    申请日：1999-03-23

    Applicant: Yasuhiko Kojima ,  Hidetsugu Fujii

    Inventor： Yasuhiko Kojima ,  Hidetsugu Fujii

    IPC: B01D5/00 ,  B01D53/00 ,  B01J3/04 ,  B01J10/00 ,  B01J19/00 ,  B01J19/02 ,  B01J19/26 ,  C07C273/04 ,  C07C275/00

    CPC classification number: C07C273/04 ,  B01D5/0003 ,  B01D53/002 ,  B01J10/002 ,  B01J19/006 ,  B01J19/0073 ,  B01J19/02 ,  B01J19/26 ,  B01J3/04 ,  B01J2219/00078 ,  B01J2219/00083 ,  B01J2219/00103 ,  B01J2219/00777 ,  B01J2219/0277 ,  B01J2219/182 ,  B01J2219/185 ,  B01J2219/1943 ,  Y02P20/149 ,  Y02P70/34

    Abstract: The present invention provides an improved process for synthesizing urea from ammonia and carbon dioxide while preventing corrosion of sites, that are to be in contact with a condensate, of the joints of a tube plate and cooling tubes in a condenser installed vertically or horizontally. According to this process, the sites, that are to be in contact with the condensate, of the joints of the tube plate and the cooling tubes in the condenser are prevented from corrosion by enveloping the sites with liquid ammonia or a solution rich in ammonia in the synthesis of urea comprising separating unreacted ammonia and carbon dioxide as a gaseous mixture thereof from a urea synthesis solution at a pressure substantially equal to the urea synthesis pressure, bringing the gaseous mixture into contact with an absorption medium in the condenser to form a condensate, and recirculating the condensate to the synthesis column.

    Abstract translation: PCT No.PCT / JP98 / 05698 Sec。 371 1999年3月23日 102（e）1999年3月23日PCT 1998年12月17日PCT PCT。 公开号WO99 /​​ 31053 日期1999年6月24日本发明提供了一种从氨和二氧化碳合成尿素的改进方法，同时防止与冷凝器接触的位置的腐蚀，管冷却器的接头和冷凝器中的冷却管安装 垂直或水平 根据该过程，通过用液氨或富含氨的溶液包围所述部位，防止了冷凝器中的管板和冷却管的接头与冷凝物接触的部位被腐蚀 尿素的合成，其包括以基本上等于尿素合成压力的压力从尿素合成溶液中分离其未反应的氨和二氧化碳作为其气体混合物，使气态混合物与冷凝器中的吸收介质接触以形成冷凝物， 并将冷凝物再循环到合成塔。

    Plant for urea production involving a carbon dioxide stripping step
    54.
    发明授权
    Plant for urea production involving a carbon dioxide stripping step 失效
    涉及二氧化碳汽提步骤的尿素生产设备

    公开(公告)号：US5681537A

    公开(公告)日：1997-10-28

    申请号：US483845

    申请日：1995-06-07

    Applicant: Giorgio Pagani

    Inventor： Giorgio Pagani

    IPC: B01J12/02 ,  C07C273/04 ,  B01J8/04

    CPC classification number: C07C273/04 ,  Y02P20/582

    Abstract: An improved process for urea production as well as a method of retrofitting a pre-existing urea plant based on the Stamicarbon process are disclosed. According to the invention, a high-yield reactor with partial removal of the reaction heat and a urea recovery section of the solution leaving the high-yield reactor, are added to the pre-existing urea plant unreacted ammonia and carbon dioxide vapors as well as a carbamate solution obtained in the urea recovery section are recycled to the pre-existing reactor.

    Abstract translation: 公开了一种用于尿素生产的改进方法以及基于Stamicarbon方法改造预先存在的尿素装置的方法。 根据本发明，将具有部分去除反应热的高产率反应器和离开高收率反应器的溶液的尿素回收部分加入到预先存在的尿素装置中，未反应的氨和二氧化碳蒸气以及 在尿素回收段中获得的氨基甲酸酯溶液被再循环到预先存在的反应器中。

    Process for producing urea
    55.
    发明授权
    Process for producing urea 失效
    生产尿素的方法

    公开(公告)号：US5597454A

    公开(公告)日：1997-01-28

    申请号：US418089

    申请日：1995-04-06

    Applicant: Jing M. Lee

    Inventor： Jing M. Lee

    IPC: B01D3/34 ,  B01D3/38 ,  C07C273/04 ,  B01D3/00 ,  C07C273/16

    CPC classification number: B01D3/34 ,  B01D3/38 ,  C07C273/04 ,  Y02P20/124 ,  Y02P20/57

    Abstract: A urea production process combining lower pressure urea concentration and carbamate recovery steps into a single non-vacuum operation. Following high pressure stripping wherein a bulk of unreacted carbamate is recovered from the reaction effluent, remaining carbamate is stripped by heated air at atmospheric pressure wherein urea is concurrently concentrated without the use of vacuum evaporators. Weak carbamate solution subsequently formed is stripped of water (and residual urea is hydrolyzed) using air and steam at a medium pressure single tower hydrolyzer/stripper to obtain a concentrated carbamate stream suitable for recycle to the reactor. The process employs heat integration for enhanced energy efficiency and produces a good quality aqueous condensate suitable for direct use as boiler feed water. Thus the aqueous condensate produced requires no additional cooling and ammonia treatment. The process employs simplified and reduced process unit operation to eliminate equipment for cost reduction.

    Abstract translation: 将低压尿素浓度和氨基甲酸酯回收步骤组合成单一非真空操作的尿素生产方法。 在高压汽提之后，从反应流出物中回收大量未反应的氨基甲酸酯，剩余的氨基甲酸酯在大气压下被加热的空气汽提，其中尿素同时浓缩而不使用真空蒸发器。 使用空气和蒸汽在中压单塔水解器/汽提器上将随后形成的弱氨基甲酸酯溶液除去水（和残留的尿素水解），得到适于再循环至反应器的浓氨基甲酸酯流。 该方法采用热集成来提高能源效率，并产生适合直接用作锅炉给水的优质水凝胶。 因此，产生的水凝胶不需要额外的冷却和氨处理。 该过程采用简化和简化的过程单元操作，以消除设备降低成本。

    Apparatus for increasing the yield and the production potential of urea reactors
    56.
    发明授权
    Apparatus for increasing the yield and the production potential of urea reactors 失效
    用于提高尿素反应器的产量和生产潜力的装置

    公开(公告)号：US5304353A

    公开(公告)日：1994-04-19

    申请号：US821428

    申请日：1992-01-15

    Applicant: Mario Dente ,  Sergio Bozzano

    Inventor： Mario Dente ,  Sergio Bozzano

    IPC: B01D3/20 ,  B01D3/22 ,  B01D53/22 ,  B01J10/00 ,  B01J19/00 ,  B01J19/24 ,  C07C273/04 ,  B01J8/04 ,  B01D3/14 ,  C07C273/00

    CPC classification number: C07C273/04 ,  B01D3/20 ,  B01D3/22 ,  B01J10/00 ,  B01J19/006 ,  B01J19/24 ,  B01J2219/0077 ,  B01J2219/00777

    Abstract: Urea is formed by the synthesis of ammonia with carbon dioxide at high pressure and temperature in an internal space of reactors through which flow a liquid phase cocurrently with a gas phase. The reactors are divided into compartments to avoid excessive mixing of the entire liquid phase and to allow the intermittent redistribution of the gas in bubbles of a suitable size for increasing the exchange of heat and matter between the two phases. At each passage from one compartment to the next, the liquid phase and the gas phase are made to flow on separate routes and are distributed in each compartment with a continuous, permanent, and even flow.

    Abstract translation: 通过在反应器的内部空间中在高压和高温下合成氨与二氧化碳形成尿素，通过该反应器将液相与气相并流流动。 反应器被分成隔室以避免整个液相的过度混合，并允许气体间断地重新分配为合适尺寸的气泡，以增加两相之间的热量和物质的交换。 在从一个隔室到另一个隔室的每个通道处，使液相和气相在不同的路线上流动，并以连续的，永久的和均匀的流量分布在每个隔室中。

    Process for the modernization of existing urea plants and a modernized urea plant
    57.
    发明授权
    Process for the modernization of existing urea plants and a modernized urea plant 失效
    现有的尿素植物和现代化尿素植物现代化的方法

    公开(公告)号：US5176800A

    公开(公告)日：1993-01-05

    申请号：US634410

    申请日：1990-12-27

    Applicant: Umberto Zardi ,  Giorgio Pagani

    Inventor： Umberto Zardi ,  Giorgio Pagani

    IPC: C07C273/04

    CPC classification number: C07C273/04 ,  Y02P20/142

    Abstract: A process to modernize existing urea plants which use a stripping with carbon dioxide, and to increase urea yields and flexibility under overload conditions while at the same time reducing energy consumption, corrosion phenomena and possible risks of explosive mixtures. The plant includes: a passivation stage with the introduction of an oxidizing agent and reduction of the air fed to the system; a medium pressure distillation stage of the products leaving the stripping section, and a condensation of the products of the distillation, effected in a pre-evaporation phase to concentrate at low pressure the urea solution.The modernized plant, includes at the start at least a reactor, a scrubber, a condenser, a stripper and the evaporators, includes also a passivation section, a medium pressure distillation section, and a distillation section with double-effect technique.

Patent Agency Ranking