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AssigneeSasol Technology (Proprietary) Limited
InventorsJan Mattheus Botha, Muzikayise Mthokozisi Justice Mbatha, Bongani Simon Nkosi, Alta Spamer, Joan Swart
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The invention provides a process for the production of propylene by butene metathesis. The process includes contacting a feedstock, which contains butene selected from 1-butene, 2-butene and mixtures thereof, with a catalyst which includes a catalytic amount of at least one metal oxide selected from oxides of the transition metals. The contacting is under reaction conditions which include a temperature of 300-600 øC. and a pressure of 1 20 atmospheres, and converts the butene to propylene, thereby to produce a reaction product containing propylene. C5— and higher hydrocarbons produced by the metathesis are separated from the reaction product and are recycled to the reaction where they are contacted with the catalyst.
A process for the production of propylene by butene metathesis which includes contacting a feedstock, which contains butene selected from the group consisting of 1-butene, 2-butene and mixtures thereof wherein the butene in the feedstock consists essentially of the butene selected from the group, with a catalyst which includes a catalytic amount of at least one metal oxide selected from the group consisting of the oxides of the transition metals, under reaction conditions which include a temperature of 300-600° C. and a pressure of 1-20 atmospheres, to convert the butene to propylene, thereby to produce a reaction product containing a propylene fraction and, additional thereto, an ethylene fraction, a C4 fraction and a C5— and higher fraction, the propylene fraction being present in the reaction product in a higher proportion in terms of mass percentage than any one of said additional fractions, the process further including separating C5— and higher hydrocarbons produced by the butene methathesis from the reaction product and then converting the separated C5— and higher hydrocarbons to propylene by recycling them and contacting them, together with the feedstock, with the transition metal oxide catalyst.
A process for the production of propylene by butene metathesis which includes contacting a feedstock, which contains butene selected from the group consisting of 1-butene, 2-butene and mixtures thereof, with a catalyst which includes a catalytic amount of at least one metal oxide selected from the group consisting of the oxides of the transition metals, under reaction conditions which include a temperature of 500-600° C. and a pressure of 1-20 atmospheres, to convert the butene to a reaction product comprising a propylene fraction and, additional thereto, an ethylene fraction, a C4 fraction and a C5— and higher fraction, the propylene fraction being present in the reaction product in a higher proportion in terms of mass percentage than any one of said additional, fractions the process further including separating C5— and higher hydrocarbons produced by the butene methathesis from the reaction product and then converting the separated C5— and higher hydrocarbons to propylene by recycling them and contacting them, together with the feedstock, with the transition metal oxide catalyst.
A process for the production of propylene by butene metathesis which includes contacting a feedstock, which contains butene selected from the group consisting of 1-butene, 2-butene and mixtures thereof wherein the butene in the feedstock consists essentially of the butene selected from the group, with a catalyst which includes a catalytic amount of at least one metal oxide selected from the group consisting of the oxides of the transition metals, under reaction conditions which include a temperature of 500-600° C. and a pressure of 1-20 atmospheres, to convert the butene to propylene, thereby to produce a reaction product comprising a propylene fraction and, additional thereto, an ethylene fraction, a C4 fraction and a C5— and higher fraction, the propylene fraction being present in the reaction product in a higher proportion in terms of mass percentage than any one of said additional fractions.
A process for the production of propylene by butene metathesis which includes contacting a feedstock, which contains butene selected from the group consisting of 1-butene, 2-butene and mixtures thereof wherein the butene in the feedstock consists essentially of the butene from the group, with a catalyst which includes a catalytic amount of at least one metal oxide selected from the group consisting of the oxides of the transition metals, under reaction conditions which include a temperature of 500-600° C. and a pressure of 1-20 atmospheres, to convert the butene to a product comprising a higher percentage yield of propylene than of the percentage yields respectively of ethylene, C4 hydrocarbons and C5— and higher hydrocarbons.
Dependencies are inferred from the claim text.