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US 4,289,656 AGranted
Catalyst for the preparation of ethylenimine
AssigneeThe Dow Chemical Company
InventorsWilliam V. Hayes, David L. Childress
Life of this patent
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Abstract
A dehydration catalyst and process for making an alkylenimine from an alkanolamine wherein the catalyst contains oxides of either tantalum or niobium together with the oxides of iron and chromium and in which the ratios of the metals are M.sub.10 Fe.sub.0.5-2.9 Cr.sub.0.3-1.7 wherein M is tantalum or niobium.
Claims2
A catalyst suitable for the dehydration of alkanolamine to obtain alkylenimine which comprises the oxides of niobium or tantalum and iron and chromium wherein the atomic ratio of the metals in the catalyst is
- M.sub.10 Fe.sub.0.5-2.9 Cr.sub.0.3-1.7
- wherein M is tantalum or niobium.
Dependencies are inferred from the claim text.