摘要:
A catalyst composition comprising palladium, silver and a support material (preferably alumina) is contacted at a relatively low temperature (of up to about 60°C) with a liquid composition comprising an effective reducing agent (preferably an alkali metal borohydride, hydrazine, formaldehyde, formic acid, ascorbic acid, dextrose, aluminum powder). Preferably, at least one alkali metal compound (more preferably KOH, RbOH, CsOH, KF) is also present in the liquid composition. An improved process for selectively hydrogenating acetylene (to ethylene) employs this wet-reduced catalyst composition.
摘要:
A catalyst composition comprising palladium, silver and a support material (preferably alumina) is contacted at a relatively low temperature (of up to about 60°C) with a liquid composition comprising an effective reducing agent (preferably an alkali metal borohydride, hydrazine, formaldehyde, formic acid, ascorbic acid, dextrose, aluminum powder). Preferably, at least one alkali metal compound (more preferably KOH, RbOH, CsOH, KF) is also present in the liquid composition. An improved process for selectively hydrogenating acetylene (to ethylene) employs this wet-reduced catalyst composition.
摘要翻译:的催化剂组合物包含钯,银和载体材料(优选氧化铝)在用液体组合物,包括相对低的温度(高达约60℃的)(优选的碱金属硼氢化物,肼,甲醛的有效还原剂接触 ,甲酸,抗坏血酸,葡萄糖,铝粉末)。 优选地,至少一种碱金属化合物(更优选KOH,R B OH,CsOH,三KF)因此在该液体组合物中存在。 为选择性氢化乙炔(以乙烯)的改进的方法采用该湿式还原的催化剂组合物。
摘要:
A process for the disproportionation of pentane to alkanes containing fewer carbon atoms per molecule and alkanes containing more atoms per molecule in the presence of a catalyst composition containing hydrogen fluoride (HF), titanium tetrafluoride (TiF 4 ) and sulfolane.
摘要:
A system and process for removing water and heteroatom-containing compounds from hydrocarbons and for regenerating the adsorbent used in the system and process is disclosed and includes contacting the hydrocarbon stream with a water adsorbent and a heteroatom-containing compound adsorbent. The regeneration includes passing an isoparaffin over the water-adsorbent followed by passing the isoparaffin over the heteroatom-containing compound adsorbent; and, optionally; cooling the resulting effluent; separating such into a hydrocarbon phase and a water phase in a settler; removing a portion of the hydrocarbon phase for contact with and mixing with water; returning the hydrocarbon/water mixture to the settler; removing a portion of the hydrocarbon phase from the settler to form a recycle isoparaffin stream for use as at least a portion of the stripping stream; and removal of at least a portion of the water phase from the settler to form a waste water stream containing water and heteroatom-containing compound.
摘要:
C 2 -C 6 alkynes (preferably acetylene) contained in feeds which also contain sulfur impurities are hydrogenated to the corresponding alkenes in the presence of a supported palladium catalyst which has been promoted with alkali metal fluoride (preferably potassium fluoride).
摘要:
A supported catalyst composition, which is effective as a diolefin hydrogenation catalyst, comprises palladium, silver and alkali metal fluoride. This catalyst composition is employed in the selective hydrogenation of C₄-C ₁₀ diolefins (preferably 1,3-butadiene) with hydrogen gas to the corresponding monoolefins.