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1. 发明授权

US3957868A Process for preparing urea from ammonia and carbon dioxide 失效
标题翻译：从氨和二氧化碳制备尿素的方法
公开(公告)号：US3957868A
公开(公告)日：1976-05-18
申请号：US470663
申请日：1974-05-16
申请人： Johannes D. M. Verstegen , Petrus J. C. Kaasenbrood
发明人： Johannes D. M. Verstegen , Petrus J. C. Kaasenbrood
IPC分类号： C07C273/02 , C07C67/00 , C07C239/00 , C07C273/04 , C07C126/00
CPC分类号： C07C273/04
摘要： An improved urea synthesis process is disclosed in which carbon dioxide and ammonia are reacted at 210.degree. to 245.degree.C under pressures of 250 to 600 atm., the gross molar NH.sub.3 /CO.sub.2 ratio in the liquid phase in the synthesis zone of the order of 2.5 and 8, the carbon dioxide and ammonia being reacted together in a synthesis zone then the resulting urea synthesis solution being stripped in a stripping zone which is in heat exchange relation with the synthesis zone through a wall, and the gas mixture resulting from the stripping is partially recycled to the synthesis zone.

2. 发明授权

US3936500A Process for preparing urea 失效
标题翻译：制备尿素的方法
公开(公告)号：US3936500A
公开(公告)日：1976-02-03
申请号：US369391
申请日：1973-06-12
申请人： Petrus J. C. Kaasenbrood , Johannes D. M. Verstegen
发明人： Petrus J. C. Kaasenbrood , Johannes D. M. Verstegen
IPC分类号： C07C67/00 , C07C239/00 , C07C273/04 , C07C126/00
CPC分类号： C07C273/04
摘要： Ammonium carbamate is decomposed and removed in the form of its gaseous components by contacting a urea synthesis solution comprising the carbamate with a stripping gas, such as carbon dioxide, the countercurrent stripping conducted at adiabatic conditions in the stripper unit. Urea synthesis solution to be treated is supplied at higher pressures and temperatures, at least 205.degree.C and at a pressure of at least 225 atm. Conveniently, the decomposition of the ammonium carbamate and the removal of the liberated gases are carried out at these temperatures and pressures so that the stripper is operative under the same conditions as well.
摘要翻译：通过使包含氨基甲酸酯的尿素合成溶液与诸如二氧化碳的汽提气体接触，氨基甲酸铵以气态组分的形式被分解和除去，在汽提器单元中在绝热条件下进行逆流汽提。待处理的尿素合成溶液在至少205℃和至少225atm的压力的较高压力和温度下供应。方便地，在这些温度和压力下进行氨基甲酸铵的分解和去除释放的气体，使得汽提器在相同的条件下也是可操作的。

3. 发明授权

US4115208A Recovery of styrene from cracked hydrocarbon fractions 失效
$Recovery of styrene from cracked hydrocarbon fractions$
标题翻译：从裂化烃馏分回收苯乙烯
公开(公告)号：US4115208A
公开(公告)日：1978-09-19
申请号：US838883
申请日：1977-10-03
申请人： Johannes D. M. Verstegen
发明人： Johannes D. M. Verstegen
IPC分类号： C07C15/46 , C10G9/00 , C10G51/06 , B01D3/14 , C07C15/10 , C10G9/44
CPC分类号： C07C15/46 , C10G9/00 , C10G2400/20 , C10G2400/30
摘要： A process for recovering maximum amounts of styrene from hydrocarbon fractions produced by thermal cracking of hydrocarbons. The cracked products are subjected to quench cooling and in a separating column separated into a bottom fraction comprised predominantly of hydrocarbons with 9 and more carbon atoms and into a top fraction comprised predominantly of hydrocarbons having less than 9 carbon atoms. The top fraction is fed to a cooling and separating device wherein a cracked gasoline fraction is recovered from which fraction styrene is recovered by fractionation. The cracked gasoline fraction from the separating device can be combined with the hydrocarbon condensates from the first and second compressor stages of a multistage compressor in which the vaporous fraction from the cooling and separating device is compressed.
摘要翻译：从碳氢化合物热裂解产生的烃馏分中回收最大量苯乙烯的方法。将裂化产物进行淬火冷却，并在分离塔中分离成主要由具有9个或更多个碳原子的烃构成的底部馏分，并分成主要由少于9个碳原子的烃组成的顶部馏分。将顶部馏分进料到冷却和分离装置，其中回收裂解汽油馏分，通过分馏回收馏分苯乙烯。来自分离装置的裂化汽油馏分可以与来自冷却和分离装置的蒸汽馏分被压缩的多级压缩机的第一和第二压缩机级的烃冷凝物组合。

4. 发明授权

US4554386A Process for the preparation of methyl tertiary butyl ether 失效
标题翻译：制备甲基叔丁基醚的方法
公开(公告)号：US4554386A
公开(公告)日：1985-11-19
申请号：US595165
申请日：1984-03-30
申请人： Christiaan Groeneveld , Dirk Knol , Johannes D. M. Verstegen , Jacobus Jansen
发明人： Christiaan Groeneveld , Dirk Knol , Johannes D. M. Verstegen , Jacobus Jansen
IPC分类号： C07C41/06
CPC分类号： C07C41/06
摘要： A process for the preparation of methyl tertiary butyl ether (MTBE) in two stages:the first stage comprising the reaction of isobutene with methanol in the presence of an acid catalyst, yielding MTBE, while the second stage comprises firstly the conversion of normal-butenes present in the hydrocarbon flow, which remains behind after separation of the MTBE formed in the first stage into isobutene and secondly passing the mixture thus obtained to a reaction zone to form MTBE.Optionally an extra amount of methanol can be supplied to said reaction zone. Said reaction zone can be the same as that used in the same first stage or another one.
摘要翻译：制备甲基叔丁基醚（MTBE）的两个阶段的方法：第一阶段包括在酸催化剂存在下异丁烯与甲醇的反应，产生MTBE，而第二阶段首先包括正丁烯转化存在于在第一阶段中形成的MTBE分离成异丁烯之后留下的烃流，其次将由此获得的混合物通过反应区形成MTBE。任选地，可向该反应区提供额外量的甲醇。所述反应区可以与在相同的第一阶段或另一阶段中使用的相同。

5. 发明授权

US3970742A Process for preparing cyanic acid 失效
标题翻译：氰酸制备方法
公开(公告)号：US3970742A
公开(公告)日：1976-07-20
申请号：US535838
申请日：1974-12-23
申请人： Johannes D. M. Verstegen
发明人： Johannes D. M. Verstegen
IPC分类号： C01C3/00 , C01C3/14
CPC分类号： C01C3/001
摘要： The invention is directed to a process for preparing cyanic acid from urea, comprising atomizing urea in a tubular reactor in the presence of a stream of a carrier gas to obviate the formation and deposition of by-products on the inner walls of the tubular reactor, thereby increasing the efficiency and production yields of the process.
摘要翻译：本发明涉及一种从尿素制备氰酸的方法，包括在载体气流存在下在管式反应器中雾化尿素以避免副产物在管状反应器的内壁上的形成和沉积，从而提高该方法的效率和产量。

6. 发明授权

US3950497A Process for preparing alkali metal and alkaline-earth metal cyanates 失效
标题翻译：制备碱金属和碱土金属氰酸盐的方法
公开(公告)号：US3950497A
公开(公告)日：1976-04-13
申请号：US481120
申请日：1974-06-19
申请人： Johannes D. M. Verstegen
发明人： Johannes D. M. Verstegen
IPC分类号： A01N59/24 , C01C1/08 , C01C3/00 , C01C3/14
CPC分类号： G02B3/02 , C01C3/001
摘要： Cyanates of alkali and alkaline-earth metals are prepared by reacting a salt such as the hydroxide, carbamate or carbonate of the metal in aqueous solution or slurry with cracked urea gas which is a gaseous mixture of ammonia and (iso)cyanic acid.
摘要翻译：碱金属和碱土金属的氰酸盐可通过使水溶液或浆料中的金属如氢氧化物，氨基甲酸盐或碳酸盐等盐与作为氨和（异）氰酸的气体混合物的裂解尿素气体反应来制备。

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