PATENTS
Ratio of 2 parts or less of H2 to 1 part of CO is employed and when the activity of the catalyst has decreased below a certain degree, the catalyst may be reactivated with a gas containing at least 2.5 parts of H2:1 part of CO. The reactivated catalyst may be even more active than the original catalyst. It is advantageous to work in 2 or more reaction vessels in order to switch over for the activation. Known catalysts can be used. |