摘要:
The invention concerns a process for the skeletal isomerisation of n-olefins containing 4 to 20 carbon atoms, consisting in bringing a feedstock containing the olefins into contact with a catalyst prepared from an alumina-based compound which is treated with a polyoroanosiloxane then heat treated. The quantity of silica introduced is generally between 0.05% and 15% by weight.
摘要:
The invention concerns a catalyst composed of at least one halogen, at least one metal from group VIII and a formed support of gamma alumina and optionally eta alumina, the catalyst being characterized in that the smallest average dimension of said support is in the range 0.8 mm to 2 mm and in that the halogen content is in the range 4.5% to 15% by weight. The invention also concerns the preparation of said catalyst, preferably with chlorination (in the case where the halogen is chlorine) in the presence of CCl.sub.4 or CHCl.sub.3. The invention also concerns the use of the catalyst for the isomerisation of normal C.sub.4 -C.sub.6 paraffins.
摘要:
A process for treating a feed comprising C.sub.5.sup.+ hydrocarbons and comprising at least one unsaturated C.sub.6.sup.+ compound including benzene, is such that the feed is treated in a distillation zone, associated with a hydrogenation zone, comprising at least one catalytic bed, in which the hydrogenation is carried out of unsaturated C.sub.6.sup.+ compounds contained in the feed, and whereof a charge for the hydrogenation step is removed at the height of a removal level and represents at least part of the liquid flowing in the distillation zone, and the effluent from the hydrogenation reaction zone is at least in part reintroduced into the distillation zone to ensure continuity of the distillation operation, the effluents at the top and bottom on the distillation zone being very depleted of unsaturated C.sub.6.sup.+ compounds. The effluent drawn off from the top of the distillation zone is treated in a zone for the isomerisation of C.sub.5 and/or C.sub.6 paraffins.
摘要:
The invention relates to a catalyst for isomerizing C.sub.8 aromatic fractions, the catalyst containing a mordenite and at least one metal from group VIII of the periodic classification of elements (such as Pt or Pd), characterized in that the mordenite is such that its skeleton Si/Al atomic ratio is between 6 and 10.5, its sodium weight content is below 2000 ppm, its unit cell volume is between 2.73 and 2.78 nm.sup.3, its benzene adsorption capacity is between 4 and 10% based on the dry mordenite weight and its 1,3,5-trimethylbenzene adsorption capacity is between 0.5 and 2.5% by weight based on the dry mordenite weight. The invention also relates to the preparation of the mordenite.
摘要:
Catalyst of aluminosilicate type for isomerization of a C.sub.8 aromatic cut, characterized by the following composition, expressed by weight:(a) 0.01 to 1.5% of at least one metal selected from platinum and palladium,(b) 0 to 99.49% of a matrix,(c) 0.5 to 99.99% of a zeolite corresponding to the following approximate formula:M.sub.2/n O, Al.sub.2 O.sub.3, X SiO.sub.2, whereinM is a proton and/or a metal cation,n is the valence of said cation,x is a number from 12 to 1000, the zeolite, of MFI structure, synthesized in fluoride medium, containing a fluorine proportion, incorporated therewith during the synthesis, in the range from 0.02 to 1.5% by weight.
摘要翻译:用于C8芳族切割异构化的硅铝酸盐催化剂,其特征在于以重量计的以下组成:(a)0.01至1.5%的至少一种选自铂和钯的金属,(b)0至99.49%的基质 ,(c)对应于以下近似式的0.5至99.99%的沸石:M2 / n O,Al 2 O 3,X SiO 2,其中M为质子和/或金属阳离子,n为所述阳离子的价数,x为 12至1000的沸石,在氟化物介质中合成的含氟比例的MFI结构的沸石在合成过程中与其组成在0.02-1.5重量%的范围内。
摘要:
A catalyst comprising a carrier, rhodium and at least one element selected from the group consisting of tin, germanium and lead is prepared from a rhodium compound and an alkyl, cycloalkyl or aryl tin, germanium or lead compound.
摘要:
Alcohols and particularly fatty alcohols are manufactured by hydrogenolysis of carboxylic esters in the presence of a catalyst comprising a carrier, rhodium and at least one second element selected from the group consisting of tin, germanium and lead. The rhodium content is from 0.1 to 5% b.w. and the content of the second element is from 0.1 to 10% b.w.
摘要:
For the treatment of a feed comprising a major portion of olefinic hydrocarbons containing 4 carbon atoms per molecule, including isobutene, 1-butene and 2-butenes in a ratio which substantially corresponds to the thermodynamic equilibrium, in which the feed is treated in a distillation zone comprising a stripping zone and a rectification zone associated with at least one hydroisomerization reaction zone, the hydroisomerization reaction zone being at least partially internal to the distillation zone and comprising at least one catalytic bed, in which hydroisomerization of at least a portion of 1-butene is carried out in the presence of a hydroisomerization catalyst and at least one gas stream comprising hydrogen, such that an effluent rich in isobutene leaves the distillation zone overhead and an effluent rich in 2-butenes leaves the bottom, the process being characterized in that each catalytic bed in the internal portion of the hydroisomerization zone is traversed by an ascending co-current of the gas stream and liquid and is substantially out of contact with the distillation vapor.
摘要:
The present invention concerns, in the dehydroisomerization of at least one C.sub.4 -C.sub.5 n-paraffin, preferably n-butane, the use of a catalyst comprising a refractory oxide based support, preferably an alumina, at least one precious metal from group VIII, preferably platinum or palladium, optionally at least one element from group IVB such as titanium or zirconium, preferably titanium, optionally at least one element from the group formed by germanium, tin, lead, rhenium, tungsten and indium, and optionally at least one halogen such as chlorine. The present invention also concerns the regeneration of this catalyst.
摘要:
The invention concerns a process for reducing the benzene content of petrol fractions and isomerizing paraffins in the presence of an isomerization catalyst comprising 4 to 15% of at least one halogen and at least one metal from group VIII deposited on a support composed of a mixture of specific proportions of eta alumina and gamma alumina, in which isomerization is carried out on a mixture of a) a feed with the following composition by weight: 40% to 80% of paraffins, 0.5% to 7% of cyclic hydrocarbons and 6% to 45% of aromatics, and with a maximum distillation temperature of between 70.degree. C. and 90.degree. C., b) a C.sub.5 -C.sub.6 cut which is generally a straight run cut, and c) a chlorine-containing compound providing a concentration of 50-5000 ppm of chlorine in the mixture.