Process for dehydrating methanol to dimethyl ether
AssigneesBp P.L.C., BP (China) Holdings Limited
InventorsBenjamin James Dennis-Smither, John Glenn Sunley, Zhiqiang Yang
Life of this patent
Estimating the term…
Abstract
A process for dehydrating methanol to dimethyl ether product in the presence of a catalyst and a promoter, wherein the catalyst is at least one aluminosilicate zeolite, and the promoter is selected from one or more compounds of Formula I: (I) wherein each of X and any or all of the Y's may independently be selected from hydrogen, halide, a substituted or unsubstituted hydrocarbyl substituent, or a compound of the formula —CHO, —CO2R, —COR, or —OR, where R is hydrogen or a substituted or unsubstituted hydrocarbyl substituent, and wherein the molar ratio of promoter to methanol is maintained at less than 1.
Claims21
A process comprising dehydrating methanol to a dimethyl ether product in the presence of a catalyst and a promoter, wherein the catalyst is at least one aluminosilicate zeolite, and the promoter is selected from one or more compounds of Formula I:
- wherein each of X and any or all of the Y's are independently hydrogen, halide, a substituted or unsubstituted hydrocarbyl substituent, or a group of the formula —CHO, —CO2R, —COR, or —OR, where R is hydrogen or a substituted or unsubstituted hydrocarbyl substituent, and
- wherein the molar ratio of the promoter to the methanol is maintained at less than 1.
A process comprising dehydrating methanol to a dimethyl ether product in the presence of a catalyst, wherein the catalyst is at least one aluminosilicate zeolite, and wherein prior to using the catalyst in the dehydration process, the catalyst has been impregnated with a promoter selected from one or more compounds of Formula I:
- wherein each of X and any or all of the Y's are independently hydrogen, halide, a substituted or unsubstituted hydrocarbyl substituent, or a group of the formula —CHO, —CO2R, —COR, or —OR, where R is hydrogen or a substituted or unsubstituted hydrocarbyl substituent.
A method of improving the productivity to dimethyl ether in a process for dehydrating methanol, the method comprising dehydrating methanol to dimethyl ether in the presence of a catalyst and a promoter, wherein the catalyst is at least one aluminosilicate zeolite, and the promoter is selected from one or more compounds of Formula I:
- wherein each of X and any or all of the Y's are independently hydrogen, halide, a substituted or unsubstituted hydrocarbyl substituent, or a group of the formula —CHO, —CO2R, —COR, or —OR, where R is hydrogen or a substituted or unsubstituted hydrocarbyl substituent, and
- wherein the molar ratio of the promoter to the methanol is maintained at less than 1.
Dependencies are inferred from the claim text.