Abstract:
A process is described for the separation of C 5 hydrocarbons present, in a quantity ranging from 0.2 to 20 % by weight, in streams prevalently containing C 4 products used for the production of high-octane hydrocarbon compounds, by the selective dimerization of isobutene, characterized in that the dimerization reaction is carried out in the presence of linear and branched alcohols and alkyl ethers in a quantity which is such as to have a molar ratio alcohols/alkyl ethers/isobutene in the feeding higher than 0.01.
Abstract translation:描述了用于分离存在的C 5 -C 5烃的方法,其量为0.2至20重量%,流体中普遍含有用于生产的C 4 S 3产物 的高辛烷烃化合物,通过选择性二聚异丁烯,其特征在于二聚反应在直链和支链醇和烷基醚的存在下进行,其量可以使醇/烷基醚的摩尔比 /异丁烯在饲料中高于0.01。
Abstract:
Process for the catalytic dehydrogenation of alkylaromatic hydrocarbons optionally mixed with ethane which comprises: A) dehydrogenating the hydrocarbon stream, optionally mixed with an inert gas, in a fluid bed reactor in the presence of a catalytic composition based on gallium and manganese supported on alumina modified with silica, at a temperature ranging from 400 to 700°C, at a total pressure ranging from 0.1 to 3 ata and with a GHSV (Gas Hourly Space Velocity) ranging from 50 to 10,000 h ; and B) regenerating and heating the catalyst, by means of the catalytic oxidation of a fuel, in a fluid bed regenerator at a temperature higher than 400°C.
Abstract:
Process for the catalytic dehydrogenation of alkylaromatic hydrocarbons optionally mixed with ethane which comprises: A) dehydrogenating the hydrocarbon stream, optionally mixed with an inert gas, in a fluid bed reactor in the presence of a catalytic composition based on gallium and manganese supported on alumina modified with silica, at a temperature ranging from 400 to 700°C, at a total pressure ranging from 0.1 to 3 ata and with a GHSV (Gas Hourly Space Velocity) ranging from 50 to 10,000 h -1 ; and B) regenerating and heating the catalyst, by means of the catalytic oxidation of a fuel, in a fluid bed regenerator at a temperature higher than 400°C.
Abstract:
Tube-bundle equipment for heat exchange operations at high pressures and temperatures, under conditions of high aggressiveness of the process fluids, comprising a titanium lining (11) and a series of tubes (1) consisting of at least one layer of zirconium (2), positioned in contact with said fluids, wherein the tube plate on which said tubes are inserted comprises an outer layer (S) of zirconium or an alloy thereof and an underlying layer (5) of titanium welded to the lining of the equipment. Said equipment is particularly used as a heat exchanger, for example as a stripper, in the high-pressure cycle of urea syntheses processes.
Abstract:
A process is described for the production of high-octane hydrocarbon compounds by means of the selective dimerization of isobutene, in the presence of C 5 hydrocarbons and oxygenated compounds (branched alcohols or alternatively blends of linear or branched alcohols and alkyl ethers) characterized in that it utilizes a catalytic distillation as second reaction step.
Abstract translation:描述了在C 5 C 5烃和含氧化合物(支链醇或可选择的直链或支链醇的共混物)的存在下,通过异丁烯的选择性二聚制备高辛烷烃化合物的方法 和烷基醚),其特征在于它利用催化蒸馏作为第二反应步骤。
Abstract:
Reactor-regenerator device, comprising at least one reactor for catalytic dehydrogenation reactions of hydrocarbons and at least one regenerator of the catalyst o the "fast riser" type wherein the regenerator-riser is a substantially tubular apparatus for chemical reactions which comprise a gaseous phase in close contact with a solid phase, wherein gas phase and solid particles move upwards in cocurrent flow.
Abstract:
A process is described for the separation of C 5 hydrocarbons present, in a quantity ranging from 0.2 to 20 % by weight, in streams prevalently containing C 4 products used for the production of high-octane hydrocarbon compounds, by the selective dimerization of isobutene, characterized in that the dimerization reaction is carried out in the presence of linear and branched alcohols and alkyl ethers in a quantity which is such as to have a molar ratio alcohols/alkyl ethers/isobutene in the feeding higher than 0.01.
Abstract:
Reactor-regenerator device, comprising at least one reactor for catalytic dehydrogenation reactions of hydrocarbons and at least one regenerator of the catalyst o the "fast riser" type wherein the regenerator-riser is a substantially tubular apparatus for chemical reactions which comprise a gaseous phase in close contact with a solid phase, wherein gas phase and solid particles move upwards in cocurrent flow.