摘要:
Process for production of styrene by dehydrogenation of ethylbenzene in a reactor system comprising a dehydrogenation reactor and a fast riser catalyst regenerator.
摘要:
Process for the production of synthesis gas from heavy charges comprising a partial oxidation of heavy charges with oxygen or air enriched in oxygen in the presence of vapour, carried out at temperatures higher than 1000° C. and pressures equal to or higher than 20 atm and the subsequent cooling of the synthesis gas obtained, by the direct injection of water into the gas itself followed by the separation of the water effected by means of an adduction pipe surrounded by a concentric tube open at both ends so as to form a ring through which the cooled gas and water can rise, characterized in that the distance (L) between the lower end of the adduction pipe and the lower end of the open concentric tube must be equal to or higher than x times the diameter (D) of said lower end of the adduction pipe, wherein x varies in relation to the specific gas mass flow-rate (F), expressed in kg/h/cm2, according to the equation x=0.026 F+0.15.
摘要翻译:用于在高于1000℃的温度和等于或高于20atm的温度下进行的在蒸气存在下用氧气或富氧的空气部分氧化重质电荷的部分氧化或重质电荷的制备方法,以及 通过将水直接注入气体本身,随后通过由两端敞开的同心管围绕的内接管分离水来随后冷却合成气体,以便形成环,通过该环 冷却的气体和水可以上升,其特征在于,内导管的下端与敞开的同心管的下端之间的距离(L)必须等于或高于所述下部的直径(D)的x倍 内置管的端部,其中x根据等式x = 0.026F + 0.15,以比例气体质量流量(F)(以kg / h / cm 2表示)而变化。
摘要:
A process for the recovery of ammonia contained in a gaseous stream is described, said process comprising the following phases: (a) subjecting the gaseous stream containing ammonia to a washing (S) with an aqueous washing solution (5a) having a pH lower than 7.0, with the formation of a purified gaseous stream (6) and an aqueous solution (7) containing an ammonium salt; (b) subjecting the aqueous solution containing the ammonium salt coming from phase (a) to a distillation process (MD) with a hydrophobic microporous membrane at a temperature ranging from 50 to 250° C. and a pressure ranging from 50 KPa to 4 MPa absolute with the formation of a regenerated washing solution (16) and a gaseous stream (18) comprising NH3 and H2O; (c) recycling said generated washing solution to phase (a). The equipment for carrying out the above process is also described.
摘要:
The present invention relates to a process for the recovery of ammonia contained in a gaseous purging stream produced in a synthesis process of urea, comprising the following phases: a) subjecting the gaseous purging stream to a washing with an aqueous acidic solution, at a pH ranging from 1 to 6, with the formation of a first purified gaseous stream and an aqueous solution containing an ammonium salt; b) subjecting the aqueous solution containing the ammonium salt coming from phase a) to stripping, after treatment with a strong base, at a temperature ranging from 50 to 250° C. and a pressure ranging from 1 to 40 absolute bar, with the formation of a second gaseous stream comprising NH3, H2O and possibly CO2 and a solution containing a salt of the cation of said strong base; c) subjecting the solution containing the salt of the cation of the strong base coming from phase b) to a Membrane Electrochemical Process (MEP) with the formation of an aqueous solution of the acid used in phase a), an aqueous solution of the base used in phase b) and possibly a diluted aqueous solution of the cation salt of the strong base; d) recycling said aqueous solution of the acid and aqueous solution of the base to phase a) and to phase b) respectively, and recycling said second gaseous stream coming from phase b) to the urea synthesis process. The relative equipment is also described.
摘要:
Integrated process for the production of alkyl and alkenyl substituted aromatic compounds which comprises simultaneously dehydrogentaing in a reactor-regenerator system a mixture containing an alkyl and an aromatic alkyl hydrocarbon coming from an alkylation unit and recycling the dehydrogenated alkyl hydrocarbon thus produced, after separation, to the alkylation unit.
摘要:
An integrated process for producing iso-butene and alkyl tert-butyl ethers in which the iso-butene is obtained by dehydrogenation of iso-butane followed by purification by partial condensation plus absorption of residual vapor with a solvent, the alkyl tert-butyl ether being obtained by reacting the purified iso-butene product with the corresponding alcohol, the essential characteristic being that the solvent used for absorbing the iso-butene is part of the product alkyl tert-butyl ether itself and/or part of the corresponding alcohol used in the process.
摘要:
A process for the recovery of ammonia contained in a gaseous stream is described, said process comprising the following phases: (a) subjecting the gaseous stream containing ammonia to a washing (S) with an aqueous washing solution (5a) having a pH lower than 7.0, with the formation of a purified gaseous stream (6) and an aqueous solution (7) containing an ammonium salt; (b) subjecting the aqueous solution containing the ammonium salt coming from phase (a) to a distillation process (MD) with a hydrophobic microporous membrane at a temperature ranging from 50 to 250° C. and a pressure ranging from 50 KPa to 4 MPa absolute with the formation of a regenerated washing solution (16) and a gaseous stream (18) comprising NH3 and H2O; (c) recycling said generated washing solution to phase (a). The equipment for carrying out the above process is also described.
摘要:
Process for the production of synthesis gas from heavy charges comprising a partial oxidation of heavy charges with oxygen or air enriched in oxygen in the presence of vapour, carried out at temperatures higher than 1000° C. and pressures equal to or higher than 20 atm and the subsequent cooling of the synthesis gas obtained, by the direct injection of water into the gas itself followed by the separation of the water effected by means of an adduction pipe surrounded by a concentric tube open at both ends so as to form a ring through which the cooled gas and water can rise, characterized in that the distance (L) between the lower end of the adduction pipe and the lower end of the open concentric tube must be equal to or higher than x times the diameter (D) of said lower end of the adduction pipe, wherein x varies in relation to the specific gas mass flow-rate (F), expressed in kg/h/cm2, according to the equation x=0.026 F+0.15.
摘要翻译:用于在高于1000℃的温度和等于或高于20atm的温度下进行的在蒸气存在下用氧气或富氧的空气部分氧化重质电荷的部分氧化或重质电荷的制备方法,以及 通过将水直接注入气体本身,随后通过由两端敞开的同心管围绕的内接管分离水来随后冷却合成气体,以便形成环,通过该环 冷却的气体和水可以上升,其特征在于,内导管的下端与敞开的同心管的下端之间的距离(L)必须等于或高于所述下部的直径(D)的x倍 内接管的端部,其中x根据等式x = 0.026F + 0.15以相对于比气体质量流量(F)的变化,以kg / h / cm 2表示。
摘要:
Reactor-regenerator device, comprising at least one reactor for catalytic dehydrogenation reactions of hydrocarbons and at least one regenerator of the catalyst of 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 co-current flow.