Method and apparatus for the production of urea from ammonia and carbon dioxide
    172.
    发明授权
    Method and apparatus for the production of urea from ammonia and carbon dioxide 有权
    用于从氨和二氧化碳生产尿素的方法和装置

    公开(公告)号:US09505712B2

    公开(公告)日:2016-11-29

    申请号:US14398425

    申请日:2013-05-02

    Abstract: Method for the production of urea from ammonia and carbon dioxide in a urea plant containing a high-pressure synthesis section with a horizontal pool condenser, wherein the method comprises exchanging heat from a high pressure process medium received in a shell section of the pool condenser to a medium pressure urea containing solution received in a first heat exchanging section provided in the pool condenser to at least decompose ammonium carbamate into NH3 and CO2, wherein the method further comprises exchanging heat from the high pressure process medium to a low pressure steam condensate received in a second heat exchanging section provided in the pool condenser to produce low pressure steam. The invention also relates to an apparatus for the production of urea from ammonia and carbon dioxide.

    Abstract translation: 在含有具有水平冷凝器的高压合成部分的尿素装置中由氨和二氧化碳生产尿素的方法,其中所述方法包括将从所述池冷凝器的壳部分中接收的高压处理介质的热交换到 容纳在所述池冷凝器中的第一热交换部分中的中压含尿素溶液以至少将氨基甲酸铵分解成NH 3和CO 2,其中所述方法还包括将热量从所述高压处理介质交换到低压蒸汽冷凝物 设置在池冷凝器中以产生低压蒸汽的第二热交换部分。 本发明还涉及一种用于从氨和二氧化碳生产尿素的设备。

    REMOVAL OF DUST IN UREA FINISHING
    173.
    发明申请
    REMOVAL OF DUST IN UREA FINISHING 审中-公开
    去除尿素处理中的污垢

    公开(公告)号:US20160184758A1

    公开(公告)日:2016-06-30

    申请号:US14902831

    申请日:2014-07-04

    CPC classification number: B01D47/10 B01D47/06 C07C273/02

    Abstract: Disclosed is a method for the removal of urea dust from the off- gas of a finishing section (1) of a urea production plant, the method comprises subjecting the off-gas to quenching with water (06) so as to produce quenched off-gas, and subjecting the quenched off-gas to scrubbing using at least one venturi scrubber (11). As a result, a lower pressure drop over the scrubber is attained, and a more efficient growth of urea particles, facilitating the removal thereof.

    Abstract translation: 公开了一种从尿素生产设备的精加工部分(1)的废气中除去尿素灰尘的方法,该方法包括使废气用水淬火(06),以产生骤冷的, 气体,并使用至少一个文丘里洗涤器(11)对骤冷的废气进行洗涤。 因此,可以获得比洗涤器更低的压降,更有效地生长尿素颗粒,便于其去除。

    UREA SYNTHESIS PROCESS AND PLANT
    174.
    发明申请
    UREA SYNTHESIS PROCESS AND PLANT 有权
    尿素合成过程和植物

    公开(公告)号:US20150322000A1

    公开(公告)日:2015-11-12

    申请号:US14655330

    申请日:2013-12-27

    Abstract: Disclosed is a urea plant comprising an additional reactor. With reference to the regular components of a urea plant, including a recovery section and a high pressure carbamate condenser, the additional reactor is positioned between the recovery section and the high pressure carbamate condenser. The invention also relates to a process for the synthesis of urea, comprising an additional reaction step converting, at an earlier stage than conventional, recovered carbamate into urea.

    Abstract translation: 公开了一种包含另外的反应器的尿素装置。 参考包括回收部分和高压氨基甲酸酯冷凝器的尿素装置的常规部件,附加反应器位于回收部分和高压氨基甲酸酯冷凝器之间。 本发明还涉及一种用于合成尿素的方法,其包括另外的反应步骤,其比在常规方法中将回收的氨基甲酸酯转化成尿素的步骤更好。

    STEAM REFORMER FURNACE, AND METHOD FOR THE SAME
    175.
    发明申请
    STEAM REFORMER FURNACE, AND METHOD FOR THE SAME 有权
    蒸汽改性炉及其相同方法

    公开(公告)号:US20150048277A1

    公开(公告)日:2015-02-19

    申请号:US14386327

    申请日:2013-03-26

    Abstract: A reformer furnace (1), comprising: at least one triple conduit assembly (200), including a flue gas conduit (220) enclosing a reaction conduit (240) enclosing a product gas conduit (260), wherein: the reaction conduit (240) extends between a lower end (244) defining a reaction gas inlet (245), and a closed upper end (242); the product gas conduit (260) extends between an upper end (262) defining a product gas inlet (263), and a lower end (264) defining a product gas outlet (265); the flue gas conduit (220) extends between an upper end (222) defining a flue gas inlet (223), and a lower end (224) defining a flue gas outlet (225); and an annulus (250) between the reaction conduit (240) and the product gas conduit (260) comprises a catalyst (252); a combustion chamber (100) that encloses an approximate upper half (226, 246, 266) of the at least one triple conduit assembly (200) while an approximate lower half (228, 248, 268) thereof resides outside of and below the combustion chamber, and that includes at least one burner (110), disposed inside of the combustion chamber and outside of the flue gas conduit (220), such that the approximate upper half (226) of the flue gas conduit substantially shields the reaction conduit (240) from direct burner flame heat radiation and impingement.

    Abstract translation: 一种重整炉(1),包括:至少一个三重管道组件(200),包括封闭产品气体管道(260)的反应管道(240)的烟道气导管(220),其中:反应管道(240) )在限定反应气体入口(245)的下端(244)和封闭的上端(242)之间延伸; 产品气体管道(260)在限定产品气体入口(263)的上端(262)和限定产品气体出口(265)的下端(264)之间延伸; 所述烟道气管道(220)在限定烟道气入口(223)的上端(222)和限定出烟气出口(225)的下端(224)之间延伸; 并且所述反应管道(240)和所述产物气体管道(260)之间的环(250)包括催化剂(252); 封闭所述至少一个三重导管组件(200)的近似上半部(226,246,266)的燃烧室(100),同时其近似下半部(228,248,268)位于燃烧室外面和下方 并且其包括设置在燃烧室内部和烟道气导管(220)外部的至少一个燃烧器(110),使得烟道气管道的大致上半部(226)基本上屏蔽反应管道 240)从直接燃烧器火焰的热辐射和冲击。

    Process for the preparation of 2 thion-oxazolidinones and derivatives thereof
    179.
    发明授权
    Process for the preparation of 2 thion-oxazolidinones and derivatives thereof 失效
    2种恶唑烷酮及其衍生物的制备方法

    公开(公告)号:US3905988A

    公开(公告)日:1975-09-16

    申请号:US11631171

    申请日:1971-02-18

    Applicant: STAMICARBON

    CPC classification number: C07D263/52 C07D263/46

    Abstract: A process for the preparation of 2-thionoxazolidone-5 and derivatives thereof is disclosed wherein tertiary alkyl esters of secondary amino carboxylic acid or the N-thiocarbonyl chloride of an Alpha -secondary aminocarboxylic acid is subjected to the action of a proton yielding acid. The compounds produced by the process of this invention are useful as amino acid derivatives in the synthesis of peptides.

    Abstract translation: 公开了制备2-硫代恶唑烷酮-5及其衍生物的方法,其中仲氨基羧酸的叔烷基酯或α-仲氨基羧酸的N-硫代羰基氯经受质子产生酸的作用。 通过本发明方法生产的化合物可用作肽合成中的氨基酸衍生物。

    Preparation of hydroxyl-terminated polyesters
    180.
    发明授权
    Preparation of hydroxyl-terminated polyesters 失效
    羟基封端的聚酯的制备

    公开(公告)号:US3894075A

    公开(公告)日:1975-07-08

    申请号:US12221771

    申请日:1971-03-08

    Applicant: STAMICARBON

    CPC classification number: C08G63/823 C07F5/069

    Abstract: A process for producing hydroxy-terminated polyester by polymerizing a lactone or a mixture of lactones in the presence of a catalyst having the general formula MM''(-OROH)4 where M is an alkali metal, M'' is aluminum or boron and R is alkylene, isoalkylene, cycloalkylene or aralkylene. Polyesters having the general formula

    are produced where R is a bifunctional hydrocarbon group, R'' and R'''' are alkylene groups and n is a whole number equal to or larger than 3.

    Abstract translation: 在具有通式MM'( - OROH)4的催化剂存在下,通过使内酯或内酯的混合物聚合来制备羟基封​​端的聚酯的方法,其中M是碱金属,M'是铝或硼,R是 亚烷基,异亚烷基,亚环烷基或亚芳烷基。 制备具有通式0的共聚物,其中R是双官能烃基,R'和R“是亚烷基,n是整数,由此产生并行化合物HO-RO-10 C-R'-O-N'-R” 数字等于或大于3。

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