公开(公告)号：US06730811B1

公开(公告)日：2004-05-04

申请号：US09586606

申请日：2000-06-02

Applicant: Johannes H. Mennen

Inventor： Johannes H. Mennen

IPC: C07C27304

CPC classification number: C07C273/04

Abstract: The invention relates to a process for the preparation of urea from ammonia and carbon dioxide in which the low-pressure carbamate stream formed in the further upgrading of the urea synthesis solution is stripped in a CO2-carbamate stripper in countercurrent contact with CO2, which results in the formation of a gas mixture consisting substantially of ammonia and carbon dioxide. This gas mixture is preferably subsequently condensed in a high-pressure carbamate condenser and then returned to the synthesis zone.

Abstract translation: 本发明涉及一种从氨和二氧化碳制备尿素的方法，其中在进一步升级尿素合成溶液中形成的低压氨基甲酸酯物流在二氧化碳 - 氨基甲酸酯汽提塔中与二氧化碳反向接触，从而得到结果 在基本上由氨和二氧化碳组成的气体混合物的形成中。优选将该气体混合物随后在高压氨基甲酸铵冷凝器中冷凝，然后返回到合成区。

公开(公告)号：US06254840B1

公开(公告)日：2001-07-03

申请号：US09266810

申请日：1999-03-12

Applicant: Johannes H. Mennen

Inventor： Johannes H. Mennen

IPC: B01J804

CPC classification number: C07C273/04 ,  B01J10/002 ,  B01J19/006 ,  B01J2219/00024 ,  B01J2219/00108 ,  B01J2219/00777

Abstract: An apparatus for effecting gas-liquid contact in a system in which the liquid is the continuous phase, the apparatus consisting of a vertical column fitted with a series of perforated trays. The perforated trays provide openings near the edges of the trays or between the trays and the inside of the column wall for the transport of liquid. The trays also include a downwardfacing flange at or near the tray edge to establish and maintain a gas cushion under the tray, the height of the flange being between 5-50% of the tray-to-tray spacing The trays further including an upwardly-facing rim on the top side of the tray within which are provided perforations designed for gas flow, the height of the rim being between 5-50% of the tray-to-tray spacing. Between adjacent trays is provided a generally cylindrical tube having a diameter smaller than that of the downwards-facing flange and larger than the upwards-facing rim, the height of the cylinder being 40-80% of the distance between two successive trays.

Abstract translation: 一种用于在其中液体是连续相的系统中进行气 - 液接触的装置，该装置由装有一系列多孔板的垂直柱组成。 多孔托盘在托盘的边缘附近提供开口，或在托盘和塔壁内部之间提供用于输送液体的开口。 托盘还包括在托盘边缘处或附近的向下的法兰，以建立和保持托盘下方的气垫，凸缘的高度在托盘间隔的5-50％之间。托盘还包括向上 - 在托盘顶部的面对边缘设有用于气体流动的穿孔，轮辋的高度在托盘到托盘间距的5-50％之间。 在相邻的托盘之间设有直径小于向下的凸缘的直径的大致圆柱形管，并且大于向上的边缘，圆柱体的高度是两个连续托盘之间的距离的40-80％。

公开(公告)号：US06392096B1

公开(公告)日：2002-05-21

申请号：US09902467

申请日：2001-07-11

Applicant: Johannes H Mennen ,  Kees Jonckers

Inventor： Johannes H Mennen ,  Kees Jonckers

IPC: C07C27304

CPC classification number: C07C273/04

Abstract: The invention relates to a process for the preparation of urea from ammonia and carbon dioxide, the preparation being effected in whole or in part in a vertical combi-reactor. The gas stream leaving the stripper is fed to the condenser section of a vertical combi-reactor in which this gas stream is wholly or partially condensed in the carbamate stream which is transferred from the scrubber section to the condenser section via a downcomer. Ammonia and carbon dioxide are partially converted into urea in this condenser section of the combi-reactor. The urea conversion is completed in the reaction section of the combi-reactor.

Abstract translation: 本发明涉及一种从氨和二氧化碳制备尿素的方法，该方法全部或部分地在立式组合反应器中进行。 离开汽提塔的气流被送入垂直组合反应器的冷凝器部分，其中该气流在氨基甲酸盐流中完全或部分冷凝，氨基甲酸酯流通过降液管从洗涤器部分转移到冷凝器部分。 在组合反应器的冷凝器部分，氨和二氧化碳部分转化为尿素。 尿素转化在组合反应器的反应段中完成。