A process for the preparation of aromatic compounds is set forth which involves contacting a feed consisting essentially of C.sub.2 -C.sub.4 paraffins and/or olefins with a crystalline aluminosilicate of the ZSM-5 type and recovering the aromatics produced. The described process can be carried out in the absence of a hydrogenation/dehydrogenation component and in the absence of added hydrogen.
4899006 - Abstract - Owned by The British Petroleum Company PLC (London,GB2)
The invention relates to a process for producing aromatic hydrocarbons from a hydrocarbon feedstock rich in C.sub.2 hydrocarbons. In particular it is a process for producing aromatic hydrocarbons comprising bringing into contact at a temperature between 580.degree. C. and 750.degree. C. a hydrocarbon feedstock containing at least 70% by weight of C.sub.2 hydrocarbons with a catalyst composition comprising an aluminosilicate having gallium deposited thereon and/or aluminosilicate in which cations have been exchanged with gallium ions, said aluminosilicates containing silica to alumina in a molar ratio of at least 5:1. The process affords a one-step method of upgrading C.sub.2 feedstock into aromatics.
Ethane is converted to LPG and gasoline and/or aromatics concentrate in a combination process which comprises directly passing olefin effluent from the thermal cracking of ethane over a special crystalline aluminosilicate zeolite of the ZSM-5 type and recovering aromatics and C.sub.3 + hydrocarbons. For best yields, the thermal cracking step is conducted under more severe conditions than are used when ethylene production is optimized. The second, olefin conversion step is carried out at either the same pressure as the cracking step or higher. The process is of particular interest where low cost ethane is available.
A process is disclosed for the preparation of an aromatic hydrocarbon mixture and hydrogen from a light hydrocarbon stream containing at least 50% w propane using as catalyst certain crystalline silicates promoted with zinc.
This invention relates to a process for producing aromatic hydrocarbons from a feedstock containing a major proportion of methane. The feedstock, in the vapor phase and in the absence of oxygen, is brought into contact with an aluminosilicate at a temperature from 650.degree. C.-800.degree. C. The feedstock may optionally contain ethane.
The conversion of lower olefins, such as ethylene or propylene, in effective contact with HZSM-11 catalyst at elevated temperatures to produce a product having a significant isobutane content.
