There are two methods to prepare LA:the catalyzed hydrolysis of furfuryl alcohol,and the hydrolysis of biomass.

The deactivation of the catalyst of furfural decarbonylation is mainly due to carbon deposition attached to the catalyst surface,it leads to the active site embedded,so the catalyst losed activity.

The experimental study on the source and scathe of the poison sulfur, iron and nickel in methanol catalyst has measured by physical-chemical instruments and chemical analytical methods.

The researches of the optimization of preparation process of methanol catalyst were summarized,also including the increase of catalyst activity and stability by adding the fourth component to the Cu/Zn/AI catalysts,the influence of impurityies on the catalyst properties,as well as the poisoning mechanism,the grain size and the hole structure control of the catalysts,The study on pre-reduction ca.

The formation mechanism of iron and nickel carbonyl and their influences on the methanol catalyst are reviewed in detail in this paper.

The selection of shift process in industrial produc tion of methanol was discussed, the effecting factors causing the poisoning & loss of activity for methanol catalyst were analyzed from the aspects of chlorine & chloride, metal carbonyl, trace of ammoinia and oil contaminant etc, the appropriate solvable methods were presented.

The new catalyst for co-production of methanol is produced by using low Cu/Zn ratio, adding rare-earth components, two steps method instead of one step precipitation method, and applying membrane separation technique to purify the feed liquid.