Process and Plant for Ammonia-Urea Production
    13.
    发明申请
    Process and Plant for Ammonia-Urea Production 有权
    氨 - 尿素生产过程和工厂

    公开(公告)号:US20140018575A1

    公开(公告)日:2014-01-16

    申请号:US14007100

    申请日:2012-02-10

    IPC分类号: C07C273/10

    摘要: A process for ammonia -urea production where: liquid ammonia produced in an ammonia section is fed to a urea section directly at the ammonia synthesis pressure, and where the liquid ammonia is purified at high pressure with the steps of: cooling the liquid ammonia (20) obtaining a cooled liquid ammonia stream (21), separating a gaseous fraction (22) comprising hydrogen and nitrogen from said cooled liquid ammonia, obtaining purified liquid ammonia (23) at a high pressure, and reheating said purified liquid ammonia (23) after separation of said gaseous fraction, obtaining a reheated purified ammonia (24) having a temperature suitable for feeding to the urea synthesis process. The application also deals with an ammonia -urea plant comprising an ammonia cooler, a liquid-gas separator and an ammonia re-heater and with a method for revamping existing ammonia -urea plants.

    摘要翻译: 一种氨 - 脲生产方法,其中在氨段产生的液氨直接以氨合成压力供给到尿素部分,并且液氨在高压下被纯化,其步骤是:冷却液氨(20 获得冷却的液氨流(21),从所述冷却的液氨中分离包含氢和氮的气态馏分(22),在高压下获得纯化液氨(23),并在 分离所述气态馏分,获得具有适于供给到尿素合成方法的温度的再加热的纯化氨(24)。 本申请还涉及一种氨脲装置,其包括氨冷却器,液气分离器和氨再加热器以及用于改造现有氨 - 脲装置的方法。

    Pseudoisothermal ammonia process
    16.
    发明授权
    Pseudoisothermal ammonia process 有权
    假热氨法

    公开(公告)号:US07892511B2

    公开(公告)日:2011-02-22

    申请号:US12048596

    申请日:2008-03-14

    申请人: Richard B. Strait

    发明人: Richard B. Strait

    摘要: Systems and processes for producing one or more products from syngas are provided. A feedstock can be gasified in the presence of an oxidant to provide a syngas comprising carbon dioxide, carbon monoxide, and hydrogen. At least a portion of the syngas can be combusted to provide an exhaust gas. At least a portion of the exhaust gas can be introduced to a channel having one or more reaction zones at least partially disposed therein, wherein the one or more reaction zones are in indirect heat exchange with the exhaust gas, wherein the one or more reaction zones comprises one or more catalyst-containing tubes. A reactant can be reacted in at least one of the one or more reaction zones to provide one or more reactor products.

    摘要翻译: 提供了从合成气生产一种或多种产品的系统和方法。 原料可以在氧化剂存在下气化,以提供包含二氧化碳,一氧化碳和氢气的合成气。 合成气的至少一部分可以燃烧以提供废气。 废气的至少一部分可以被引入具有至少部分地设置在其中的一个或多个反应区的通道,其中一个或多个反应区与排气间接热交换,其中一个或多个反应区 包含一种或多种含催化剂的管。 反应物可以在一个或多个反应区中的至少一个中反应,以提供一种或多种反应器产物。

    Method of coproducing methanol and ammonia
    17.
    发明申请
    Method of coproducing methanol and ammonia 有权
    共同生产甲醇和氨的方法

    公开(公告)号:US20100150810A1

    公开(公告)日:2010-06-17

    申请号:US12653149

    申请日:2009-12-09

    IPC分类号: C01C1/04 C07C27/12

    摘要: The present invention enables the coproduction of methanol and ammonia by using a remarkably smaller amount of raw material, natural gas, as compared with the case of independently producing either of methanol or ammonia. Specifically, the present invention provides a process of coproducing methanol and ammonia by using natural gas, LPG, butane, or naphtha as raw material, having a methanol production process (A) composed of specific steps and an ammonia production process (B) also composed of specific steps, in which (1) directing a gas rich in hydrogen recovered in a hydrogen recoverying step in the methanol production process (A) to a certain step after an air reforming step and before a ammonia synthesis step in the ammonia production process (B) to prepare additional feedstock gas for ammonia synthesis; and also (2) cooling a synthesis gas, formed in a steam reforming step in the methanol production process (A) and separating and removing condensed water from the cooled synthesis gas, mixing the water removed synthesis gas and carbon dioxide obtained by pre-compressing carbon dioxide obtained in a CO2 removing step in the ammonia production process (B), compressing up to the methanol synthesis pressure to be supplied as reactant gas for methanol synthesis to the methanol synthesis step (A-2).

    摘要翻译: 与独立地生产甲醇或氨的情况相比,本发明能够通过使用显着更少量的原料天然气来共同生产甲醇和氨。 具体地说,本发明提供了使用天然气,LPG,丁烷或石脑油作为原料共同生产甲醇和氨的方法,其具有由特定步骤构成的甲醇生产方法(A)和还包含氨生产方法(B) 具体步骤,其中(1)在甲醇生产方法(A)中将在氢气回收步骤中回收的富含氢气的气体引导到空气重整步骤之后的一个步骤,并且在氨生产过程中的氨合成步骤之前 B)制备用于氨合成的另外的原料气体; 以及(2)在甲醇生产方法(A)中在蒸汽重整步骤中形成的合成气冷却并从冷却的合成气中分离和除去冷凝水,将除去水的合成气和通过预压缩获得的二氧化碳混合 在氨生产方法(B)中在二氧化碳去除步骤中获得的二氧化碳,压缩至作为用于甲醇合成的反应气体供应到甲醇合成步骤(A-2)的甲醇合成压力。

    Process for urea production from ammonia and carbon dioxide
    18.
    发明授权
    Process for urea production from ammonia and carbon dioxide 有权
    从氨和二氧化碳生产尿素的方法

    公开(公告)号:US07732640B2

    公开(公告)日:2010-06-08

    申请号:US11572387

    申请日:2005-07-22

    摘要: A process for urea production comprises a first process step in which ammonia (7) and carbon dioxide (6) are obtained, subjecting natural gas (1) to reforming treatments (12, 14), and a second step of urea (8a) production from such ammonia (7) and from carbon dioxide, through a formation of a solution comprising urea and ammonium carbamate in a urea synthesis reactor (20) and a subsequent decomposition of the ammonium carbamate and. urea recovery, the process comprises the steps of:—treating combustion smokes (5) comprising carbon dioxide with an aqueous solution (9a) comprising a part (7b) of such ammonia (7), obtaining an aqueous ammonium carbamate solution (9c);—supplying the solution (9c) thus obtained to the second process step.

    摘要翻译: 一种尿素生产方法包括第一工艺步骤,其中得到氨(7)和二氧化碳(6),使天然气(1)进行重整处理(12,14),第二步是制备尿素(8a) 通过在尿素合成反应器(20)中形成包含尿素和氨基甲酸铵的溶液,随后氨基甲酸铵和/或氨基甲酸铵的分解,从这种氨(7)和二氧化碳中形成包含尿素和氨基甲酸铵的溶液。 尿素回收,该方法包括以下步骤: - 将包含二氧化碳的燃烧烟雾(5)与包含这种氨(7)的部分(7b)的水溶液(9a)反应,得到氨基甲酸铵水溶液(9c); 将由此获得的溶液(9c)供应到第二处理步骤。

    Method for the Production of Urea from Natural Gas
    19.
    发明申请
    Method for the Production of Urea from Natural Gas 失效
    从天然气生产尿素的方法

    公开(公告)号:US20080207948A1

    公开(公告)日:2008-08-28

    申请号:US11665278

    申请日:2005-08-18

    IPC分类号: C07C273/02

    摘要: Disclosed is a method for the production of urea from natural gas, wherein a) natural gas undergoes partial oxidation or autothermal reformation with a gas containing oxygen in a first step and the raw synthesis gas thus arising, consisting essentially of carbon monoxide, carbon dioxide, methane and hydrogen, can be transformed by catalytic conversion of CO and H2O to form CO2 and H2, whereupon carbon monoxide and methane are removed in a multistep gas cleaning process and the hydrogen is converted into ammonia upon addition of nitrogen, and subsequently, b) the ammonia is recombined with the previously separated carbon dioxide in a second step and the ammonia is thus fully converted into urea.

    摘要翻译: 公开了一种用于从天然气生产尿素的方法,其中a)天然气在第一步中用含氧气体进行部分氧化或自热重整,由此产生的原始合成气基本上由一氧化碳,二氧化碳, 甲烷和氢气可以通过CO和H 2 O 2的催化转化而转化成CO 2 H 2和H 2 O,从而一氧化碳和甲烷 在多步骤气体清洗过程中被除去,并且在加入氮气时将氢气转化成氨,随后b)在第二步骤中氨与先前分离的二氧化碳重新组合,因此氨完全转化为尿素。