Heterogeneous hydrocyanation
AssigneeInvista North America S.A.R.L.
InventorsWilliam J. Tenn, III, Sudkir N. V. K. Aki
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Abstract
The present invention relates to an improved process for addition of hydrogen cyanide across olefins and, in particular, to the use of a specific aluminum oxide to catalyze the reaction. The aluminum oxide catalyst must have total alkali metal and/or alkaline earth metal content, measured in the form of alkali metal oxide and/or alkaline earth metal oxide, of less than 3,000 ppm by weight.
Claims18
A process for addition of hydrogen cyanide across an olefin which comprises contacting an olefin with hydrogen cyanide at reaction conditions in the presence of an aluminum oxide catalyst, wherein the aluminum oxide catalyst has total alkali metal and/or alkaline earth metal content, measured in the form of alkali metal oxide and/or alkaline earth metal oxide, of less than 3,000 ppm by weight.
A process for manufacturing ethylsuccinonitrile which comprises contacting cis-2-pentenenitrile, 3-pentenenitrile or a combination thereof with hydrogen cyanide in the liquid phase or vapor phase at reaction conditions in the presence of an aluminum oxide catalyst, wherein the aluminum oxide catalyst has total alkali metal and/or alkaline earth metal content, measured in the form of alkali metal oxide and/or alkaline earth metal oxide, of less than 3,000 ppm by weight.
A process for manufacturing 2,3-dimethylsuccinonitrile which comprises contacting cis-2-methyl-2-butenenitrile, trans-2-methyl-2-butenenitrile, 2-methyl-3-butenenitrile or a combination thereof with hydrogen cyanide in the liquid phase at reaction conditions in the presence of an aluminum oxide catalyst, wherein the aluminum oxide catalyst has total alkali metal and/or alkaline earth metal content, measured in the form of alkali metal oxide and/or alkaline earth metal oxide, of less than 3,000 ppm by weight.
Dependencies are inferred from the claim text.