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1. 发明授权

US07555917B2 Process for purification of anhydrous hydrogen chloride gas 有权
标题翻译：纯化无水氯化氢气体的方法
公开(公告)号：US07555917B2
公开(公告)日：2009-07-07
申请号：US10787608
申请日：2004-02-26
申请人： Bill L. Brady, Jr. , Guenther Weymans , Berthold Keggenhoff , Friedhelm Steffens
发明人： Bill L. Brady, Jr. , Guenther Weymans , Berthold Keggenhoff , Friedhelm Steffens
IPC分类号： F25J3/00
CPC分类号： B01D53/002 , C01B7/0706
摘要： High boiling contaminants such as chloro-aromatic compounds are removed from a gas by compressing the gas containing the contaminant, cooling the compressed gas to reduce the temperature of the gas to at least 20° C. above the outlet temperature of a second cooling stage but above the freezing point of the highest melting compound in the first cooling stage, further cooling the gas in a second cooling stage to at least −20° C., returning cooled gas from the second cooling stage to the first cooling stage, and recovering condensate streams which contain the contaminant compound from the first and second cooling stages. An apparatus suitable for carrying out this process is also disclosed. The process of the present invention is particularly useful for removing chloro-aromatic compounds from anhydrous hydrogen chloride gas.
摘要翻译：通过压缩含有污染物的气体从气体中除去高沸点污染物，例如氯 - 芳族化合物，冷却压缩气体，将气体的温度降低至高于第二冷却阶段的出口温度至少20℃，但是高于第一冷却阶段中最高熔融化合物的凝固点，在第二冷却阶段进一步将气体冷却至至少-20℃，将冷却的气体从第二冷却段返回到第一冷却阶段，并回收冷凝物含有来自第一和第二冷却阶段的污染化合物的物流。还公开了一种适于实施该方法的装置。本发明的方法特别适用于从无水氯化氢气体中除去氯代芳族化合物。

2. 发明授权

US06719957B2 Process for purification of anhydrous hydrogen chloride gas 有权
公开(公告)号：US06719957B2
公开(公告)日：2004-04-13
申请号：US10124795
申请日：2002-04-17
申请人： Bill L. Brady, Jr. , Guenther Weymans , Berthold Keggenhoff , Friedhelm Steffens
发明人： Bill L. Brady, Jr. , Guenther Weymans , Berthold Keggenhoff , Friedhelm Steffens
IPC分类号： C01B707
CPC分类号： B01D53/002 , C01B7/0706
摘要： High boiling contaminants such as chloro-aromatic compounds are removed from a gas by compressing the gas containing the contaminant, cooling the compressed gas to reduce the temperature of the gas to at least 20° C. above the outlet temperature of a second cooling stage but above the freezing point of the highest melting compound in the first cooling stage, further cooling the gas in a second cooling stage to at least −20° C., returning cooled gas from the second cooling stage to the first cooling stage, and recovering condensate streams which contain the contaminant compound from the first and second cooling stages. An apparatus suitable for carrying out this process is also disclosed. The process of the present invention is particularly useful for removing chloro-aromatic compounds from anhydrous hydrogen chloride gas.

3. 发明授权

US07504533B2 Process for the production of isocyanates 有权
标题翻译：生产异氰酸酯的方法
公开(公告)号：US07504533B2
公开(公告)日：2009-03-17
申请号：US11409940
申请日：2006-04-24
申请人： Matthias Böhm , Wolfgang Lorenz , Bill L. Brady, Jr. , Donald L. Pferdehirt
发明人： Matthias Böhm , Wolfgang Lorenz , Bill L. Brady, Jr. , Donald L. Pferdehirt
IPC分类号： C07C263/00 , C07C249/00
CPC分类号： C07C263/10 , C01B7/0706 , C01B7/0731 , C07C263/20 , C07C265/14
摘要： Isocyanates are produced by a) reacting at least one amine with phosgene, optionally in the presence of a solvent to produce the corresponding isocyanate and a stream containing hydrogen chloride, phosgene and optionally solvent, low-boiling compounds and inert substances is obtained, b) separating the stream containing hydrogen chloride, phosgene and optionally solvent, low-boiling compounds and inert substances in an at least two-stage sequence of absorption steps that includes (1) at least one isothermal absorption step and (2) at least one adiabatic absorption step, to obtain (i) a hydrogen chloride stream containing phosgene in concentrations of at most 0.5 wt. % (based on the weight of the hydrogen chloride stream) and (ii) a liquid phosgene stream, and c) recycling the liquid phosgene stream (ii) to the reaction of amine with phosgene.
摘要翻译：异氰酸酯通过以下方法制备：a）任选地在溶剂存在下使至少一种胺与光气反应以产生相应的异氰酸酯，并且获得含有氯化氢，光气和任选溶剂的低沸点化合物和惰性物质的流，b）在至少两级的吸收步骤序列中分离含有氯化氢，光气和任选溶剂的低沸点化合物和惰性物质，其包括（1）至少一个等温吸收步骤和（2）至少一个绝热吸收步骤，以获得（i）含有至多0.5重量％浓度的光气的氯化氢流。％（基于氯化氢流的重量）和（ii）液体光气流，和c）将液体光气流（ii）再循环到胺与光气的反应中。

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