초록 ▼

Monofunctional dehydrocyclization catalyst of paraffins, characterized in that it contains: 0.1 to 1.5% platinum, o.1 to 1.5% rhenium incorporated in the form of carbonyl, a small proportion of sulphur introduced by a sulphur compound reducible or decomposable by hydrogen such that the ratio x of th

Monofunctional dehydrocyclization catalyst of paraffins, characterized in that it contains: 0.1 to 1.5% platinum, o.1 to 1.5% rhenium incorporated in the form of carbonyl, a small proportion of sulphur introduced by a sulphur compound reducible or decomposable by hydrogen such that the ratio x of the number of sulphur atoms to the number of platinum and rhenium atoms deposited on the catalyst be comprised between 0.05 and 0.6, the carrier being constituted by a zeolitic crystalline aluminosilicate compensated in more than 90% by alkaline cations having a pore diameter of more than 6.5 Angstroms.

대표청구항 ▼

A process for preparing a bimetallic catalyst for the dehydrocyclization of paraffins comprising a carrier comprised of a zeolitic crystalline aluminosilicate exchanged with more than 90% of alkali metal cations and having a pore diamter larger than 6.5 Angstroms; 0.1 to 1.5% platinum; 0.1 to 1.5% r

A process for preparing a bimetallic catalyst for the dehydrocyclization of paraffins comprising a carrier comprised of a zeolitic crystalline aluminosilicate exchanged with more than 90% of alkali metal cations and having a pore diamter larger than 6.5 Angstroms; 0.1 to 1.5% platinum; 0.1 to 1.5% rhenium obtained from rhenium carbonyl, the ratio of the rhenium/platinum varying with the pressure of use; a small amount of sulphur such that the ratio x of the number of sulphur atoms to platinum and rhenium atoms is from betweeon about 0.05 and 0.6, said process comprising the impregnating steps carried out in any desired order (a) charging the carrier with rhenium by sublimation of rhenium carbonyl; (b) impregnating the carrier with an aqueous solution or water soluble complex of platinum; (c) incorporating sulphur into the carrier by contacting with a sulphur containing compound; (d) the impregnated carrier having received the charges of rhenium carbonyl, platinum complex, and sulphur compound being then dried, optionally calcined, and reduced by hydrogen at a temperature from about 300°C. to 500°C. prior to use. A process for making a bimetallic catalyst for the dehydrocyclization of paraffins, comprising a carrier comprised of a zeolitic crystalline aluminosilicate exchanged with more than 90% of alkali metal cations and having a pore diameter larger than 6.5 Angstroms; 0.1 to 1.5% platinum; 0.1 to 1.5% rhenium obtained from rhenium carbonyl, the ratio of the rhenium/platinum varying with the pressure of use; a small amount of sulphur such that the ratio x of the number of sulphur atoms to platinum and rhenium atoms is from between about 0.05 and 0.6, said process comprising the impregnating steps carried out in any order desired: (a) charging the carrier with rhenium by impregnation with a solution of rhenium carbonyl in acetone; (b) impregnating the carrier with an aqueous solution or water soluble complex of platinum; (c) impregnating sulphur by impregnation of the carrier with a solution of a sulphur containing compound; and (d) after the impregnation steps, drying, heat treating and reducing the impregnated carrier with hydrogen at a temperature between about 300°C. and 550°C. prior to use. A bimetallic catalyst prepared by the method of claim 1 or 13.