摘要:
A process for preparing cyclohexanol from benzene by: a) preparing cyclohexene by hydrogenating benzene in the presence of a catalyst, and b) preparing cyclohexanol by hydrating the cyclohexene in the presence of a catalyst, comprises: carrying out steps a) and b) in a reaction facility which has a bottom region at the lower end, a top region at the upper end, and a reaction zone between the top region and the bottom region which contains the catalyst according to steps a) and b), evaporating a portion of the benzene using the heat of reaction in the reaction zone, condensing it in the top region and returning it to the reaction zone, and withdrawing a reaction mixture containing cyclohexanol in the bottom region.
摘要:
A process for preparing cyclohexanol from benzene by a) preparing cyclohexene by hydrogenating benzene in the presence of a catalyst and b) preparing cyclohexanol by hydrating the cyclohexene in the presence of a catalyst, comprises carrying out steps a) and b) in a reaction facility which has a bottom region at the lower end, a top region at the upper end and a reaction zone between the top region and the bottom region which contains the catalyst according to steps a) and b), evaporating a portion of the benzene using the heat of reaction in the reaction zone, condensing it in the top region and returning it to the reaction zone, and withdrawing a reaction mixture containing cyclohexanol in the bottom region.
摘要:
In a continuous process for fractionating a C4 fraction (C4) by extractive distillation using a selective solvent (LM) in an extractive distillation column (EDK), it is proposed that a dividing wall (TW) is installed in the longitudinal direction in the extractive distillation column (EDK) to form a first region (A), a second region (B) and a lower combined column region (C) and a top stream (C4H10) comprising the butanes is taken off from the first region (A), a top stream (C4H8) comprising the butenes is taken off from the second region (B) and a stream (C4H6) comprising the hydrocarbons from the C4 fraction which are more soluble in the selective solvent (LM) than are the butanes and the butenes is taken off from the lower combined column region (C).
摘要翻译:在萃取蒸馏塔(EDK)中使用选择性溶剂(LM)通过萃取蒸馏分馏C 4 H 4馏分(C 4 H 4)的连续方法中,提出了 在萃取蒸馏塔(EDK)中沿长度方向安装分隔壁(TW)以形成第一区域(A),第二区域(B)和下部混合塔区域(C)和顶部流体 包含丁烷的C 4 H 10 H 11从第一区域(A),顶部流(C→H) 8)从第二区域(B)和包含来自C H 6 S 6)取出, 比在丁烷中更溶解的选择性溶剂(LM)中的分馏比从下部组合柱区域(C)中除去。
摘要:
In a continuous process for fractionating a C4 fraction (C4) by extractive distillation using a selective solvent (LM) in an extractive distillation column (EDK), it is proposed that a dividing wall (TW) is installed in the longitudinal direction in the extractive distillation column (EDK) to form a first region (A), a second region (B) and a lower combined column region (C) and a top stream (C4H10) comprising the butanes is taken off from the first region (A), a top stream (C4H8) comprising the butenes is taken off from the second region (B) and a stream (C4H6) comprising the hydrocarbons from the C4 fraction which are more soluble in the selective solvent (LM) than are the butanes and the butenes is taken off from the lower combined column region (C).
摘要翻译:在采用萃取蒸馏塔(EDK)中使用选择性溶剂(LM)的萃取蒸馏法分馏C4馏分(C4)的连续方法中,提出了在提取物中纵向安装分隔壁(TW) 从第一区域(A)取出蒸馏塔(EDK)以形成第一区域(A),第二区域(B)和下部混合塔区域(C)以及包含丁烷的顶部流(C 4 H 10) 包含丁烯的顶流(C 4 H 8)从第二区域(B)和包含来自C4馏分的烃(C4H6)的流(C4H6)比丁烷和丁烯更可溶于选择性溶剂(LM) 从下组合柱区域(C)中取出。
摘要:
The present invention relates to a continuous process for preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine by reacting a feed stream comprising 3-cyano-3,5,5-trimethylcyclohexylimine with hydrogen and ammonia over hydrogenation catalysts, wherein the basicity of the reaction mixture is increased during the reaction by bringing the reaction mixture into contact with a basic compound which is not ammonia and/or a basic catalyst after part of the 3-cyano-3,5,5-trimethylcyclohexylimine has been reacted.
摘要:
A system comprising of a pilot module, and other modules configured to generate a personal process consisting of milestones, goals and timelines based on a preconfigured process or input from a user of a type of event related to the process or user decisions, and link emails and other communications, contacts, events, and resources with the milestones, goals and timing within the generated process, and display messages and events in a manner prioritized based on the process and links therewith; and a plurality of other modules configured to work in conjunction with the pilot module to allow the a user to manage the generated process.
摘要:
The invention relates to a catalyst for the oxidation of SO2 to SO3 and also a process for producing it and its use in a process for the oxidation of SO2 to SO3.
摘要:
A method and apparatus for providing a voicemail notification to a subscriber or customer in a communication network are disclosed. For example, the present method uses a wireless integrated access device (WIAD) to interact with a voicemail server via the Internet. The WIAD determines whether a newly saved voicemail exists for a customer and then interacts with at least one endpoint device that is located at a customer premise to provide a voicemail notification to the customer if a newly saved voicemail exists for the customer.
摘要:
A process for regenerating a hydrogenation catalyst which has been used in a gas-phase hydrogenation, which comprises stripping at from 50 to 300° C. with a substance or a substance mixture which under the process conditions has no oxidizing action and is present in the gaseous state is described.
摘要:
The invention relates to a process for recovering 3-aminomethyl-3,5,5-trim-ethylcyclohexylamine (isophoronediamine, IPDA) having a fractionally distilled cis/trans isomer ratio of at least 73/27. The process includes the following steps: a) providing IPDA in a cis/trans isomer ratio of