摘要:
Process for the dehydrogenation of a charge incorporating saturated aliphatic hydrocarbons essentially having 3 to 5 carbon atoms per molecule, in which the charge, previously heated to the reaction temperature and without premixing with the hydrogen, is introduced at the inlet of at least one reactor, where the dehydrogenation reaction is performed in the presence of a catalyst, preferably incorporating a support having at least one oxide of an element chosen from among the groups IIA, IIB, IIIA, IIIB, IVA and IVB of the periodic classification of elements, at least one noble metal from the platinum family, at least one promotor metal and at least one alkali metal or alkaline earth metal.
摘要:
The invention relates to a process for the selective hydrogenation of diolefins in steam cracking petrol in the presence of a nickel catalyst and is characterized in that prior to the use of the catalyst, a suphur-containing organic compound is incorporated into the catalyst outside of the reactor.
摘要:
The simultaneous production of an olefin-free, tert.amyl alkyl, ether-rich fraction an n-pentane-rich paraffin fraction, wherein a charge based on isopentenes is hydrogenated (1) under appropriate conditions to bring about a distribution of the methyl butenes close to thermodynamic equilibrium and then the hydrogenation effluent is treated in an etherification zone (2).
摘要:
A C.sub.4 cut of high butadiene content is selectively hydrogenated in contact with a supported palladium catalyst, the operation being performed in admixture with a hydrocarbon and an amine.The C.sub.4 cut of high butadiene content (1) and liquid hydrocarbon containing the amine (6) pass through reactor (2). The resultant product is fractionated (13). The C.sub.4 cut is recovered in the vapor phase (15) and the liquid phase recycled (16).
摘要:
A process for the recovery of mercury and arsenic for which elementary mercury and/or mercury mercaptides are recovered prior to the recovery of arsenic and wherein the recovery temperature of the arsenic is higher than the recovery temperature of the mercury.
摘要:
The invention concerns the production of a substituted or unsubstituted aniline by selective hydrogenation of the corresponding nitroaromatic compound. It is characterized by the use of a catalyst based on a metal selected from rhodium and ruthenium and based on a metal selected from the group comprising tin, germanium and lead.
摘要:
Phenol production process wherein:1) benzene is reacted with propene and isopropylic alcohol by contacting a catalyst based on a dealuminized Y zeolite with a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio ranging from 8 to 70, then the obtained product is fractionated into a first fraction comprising non converted benzene, a second fraction comprising cumene and a third fraction comprising polyisopropylbenzenes,2) said third fraction is reacted with benzene by contacting a catalyst based on a dealuminized Y zeolite with a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio ranging from 8 to 70 or based on a dealuminized mordenite with a total Si/Al atomic ratio ranging from 20 to 60, and cumene is collected,3) the obtained cumene is converted into a mixture of acetone and phenol,4) the obtained acetone is at least partly hydrogenized into an isopropylic alcohol which is then recycled at least partly to stage 1.
摘要翻译:苯酚的制备方法,其中:1)通过使基于脱铝Y沸石的催化剂与SiO 2 / Al 2 O 3摩尔比为8至70的摩尔比使苯与丙烯和异丙醇反应,然后将所得产物分馏成不含 转化的苯,包含异丙基苯的第二馏分和包含聚异丙基苯的第三馏分; 2)所述第三馏分与苯反应,使基于脱铝Y沸石的催化剂与SiO 2 / Al 2 O 3摩尔比范围为8至70或基于 脱铝丝光沸石,总Si / Al原子比为20〜60,收集异丙基苯,3)将得到的枯烯转化成丙酮和苯酚的混合物,4)得到的丙酮至少部分氢化成异丙醇 然后将其再次回收至第一阶段。
摘要:
The invention relates to a pretreatment of a petrochemical or refining catalyst containing at least one metal in metallic or metallic oxide form, deposited on a support.The catalyst is impreganted by a solution or a suspension containing on the one hand a specific sulphur agent, e.g., diethanol disulfide and on the other an organic reducing agent, e.g., formic acid.
摘要:
This process for hydrogenating an olefin contained in a mixture of said olefin with an ether and optionally with sulfur, comprises reacting hydrogen with said mixture in the presence of a noble metal-containing catalyst, said catalyst containing at least one first noble metal from the palladium, rhodium, iridium and platinum group and at least one second other metal from the gold and platinum group.
摘要:
Process for producing 2-methyl-2-butene from a charge containing olefins of 5 carbon atoms, including 2-methyl-1-butene and at least one n-pentene, wherein a mixture of said charge with hydrogen and at least one sulfur compound is contacted with a supported catalyst comprising at least one noble metal from group VIII.The 2-methyl-1-butene of the charge is isomerized to 2-methyl-2-butene and the n-pentenes are hydrogenated.