摘要:
The present invention relates to a process for separating off solvents from solvent-comprising hydrogenation outputs from a catalytic hydrogenation process, which comprise at least one water-soluble hydrogenation product having at least one alcohol, lactone, ether, lactam or amino group in a solvent which is immiscible or not completely miscible with water and has a boiling point below 100° C., wherein water is added to the hydrogenation output, the solvent-comprising phase is separated off and recirculated to the hydrogenation.
摘要:
The present invention relates to a process for separating off solvents from solvent-comprising hydrogenation outputs from a catalytic hydrogenation process, which comprise at least one water-soluble hydrogenation product having at least one alcohol, lactone, ether, lactam or amino group in a solvent which is immiscible or not completely miscible with water and has a boiling point below 100° C., wherein water is added to the hydrogenation output, the solvent-comprising phase is separated off and recirculated to the hydrogenation.
摘要:
In a process for preparing a supported hydrogenation catalyst with increased hydrogenation activity, which comprises a hydrogenating metal and/or an oxide of a hydrogenating metal on an Al2O3-containing support material, said calcined supported hydrogenation catalyst is treated before or after the final shaping thereof and before use thereof in the hydrogenation with a base solution having a pH of >10 at a temperature in the range from 20 to 120° C. for 1 to 300 hours.
摘要翻译:在含有Al 2 O 3的载体材料上制备含氢化金属和/或氢化金属的氢化物的氢化活性增加的负载型氢化催化剂的方法中,所述煅烧的负载氢化催化剂在其最终成型之前或之后进行处理 并且在使用之前,在温度为20〜120℃的pH为> 10的碱溶液中氢化1〜300小时。
摘要:
In a process for preparing a supported hydrogenation catalyst with increased hydrogenation activity, which comprises a hydrogenating metal and/or an oxide of a hydrogenating metal on an Al2O3-containing support material, said calcined supported hydrogenation catalyst is treated before or after the final shaping thereof and before use thereof in the hydrogenation with a base solution having a pH of >10 at a temperature in the range from 20 to 120° C. for 1 to 300 hours.
摘要翻译:在含有Al 2 O 3的载体材料上制备含氢化金属和/或氢化金属的氢化物的氢化活性增加的负载型氢化催化剂的方法中,所述煅烧的负载氢化催化剂在其最终成型之前或之后进行处理 并且在使用之前,在温度为20〜120℃的pH为> 10的碱溶液中氢化1〜300小时。
摘要:
The present invention provides a process for preventing fumaric acid deposits in the preparation of maleic anhydride, comprising the following steps:a) absorption of a C4-dicarboxylic acid or of a derivative from a crude product mixture into an organic solvent or water as an absorbent,b) removal of the C4-dicarboxylic acid or of a derivative from the absorbent,the absorbent thus recovered being catalytically hydrogenated fully or partly and recycled fully or partly into the absorption stage (a).
摘要:
The present invention provides a process for preparing 2-methyltetrahydrofuran by one-stage hydrogenation of furfural with a hydrogen-comprising gas in the presence of a supported catalyst which comprises at least one noble metal from groups 8, 9 and/or 10 of the periodic table of the elements.
摘要:
The present invention provides a process for preparing 2-methyltetrahydrofuran by one-stage hydrogenation of furfural with a hydrogen-comprising gas in the presence of a structured bed of at least one copper catalyst and at least one catalyst which comprises at least one noble metal from groups 8, 9 and/or 10 of the periodic table of the elements applied on a support material.
摘要:
The present invention provides a process for preparing 2-methyltetrahydrofuran by one-stage hydrogenation of furfural with a hydrogen-comprising gas in the presence of a structured bed of at least one copper catalyst and at least one catalyst which comprises at least one noble metal from groups 8, 9 and/or 10 of the periodic table of the elements applied on a support material.
摘要:
The present invention relates to porous metallic frameworks comprising at least one at least bidentate organic compound coordinated to at least one metal ion, wherein the at least one at least bidentate organic compound is derived from 2,5-furandicarboxylic acid or 2,5-thiophenedicarboxylic acid. The present invention further relates to shaped bodies comprising these frameworks, processes for producing them and their use, in particular for the storage and separation of gases.
摘要:
A device for propelling a vehicle includes at least two electric motors, whereas each of the electric motors is equipped with a cooling device. The cooling device includes at least one cooling fluid line, whereas the cooling fluid lines are connected to the two cooling devices through a common cooling fluid connection line.