Cellulose heterogeneous catalytic reaction

In this process, coal is gasified to give synthesis gas, which is then converted to methanol by a heterogeneous catalytic process. Reaction of methanol with acetic acid by reactive distillation gives methyl acetate, which is then reacted with CO to give acetic anhydride. The cellulose ester is made by reacting acetic anhydride with cellulose. The acetic acid required for the synthesis of methyl acetate comes from recycling the acetic acid produced in the manufacture of cellulose ester. 

Another filtration approach concerns the addition of a filter aid after reaction, like powered cellulose, celite or powdered graphite [6a]. The solution is filtered and the catalytic behaviour of both components, solution and filter aid, is then tested and compared with the catalytic behaviour before the filter aid addition. This methodology was first described by Maitlis and co-workers for distinguishing a heterogeneous component in a starting... 

Heterogeneous catalysts, particularly zeolites, have been found suitable for performing transformations of biomass carbohydrates for the production of fine and specialty chemicals.123 From these catalytic routes, the hydrolysis of abundant biomass saccharides, such as cellulose or sucrose, is of particular interest. The latter disaccharide constitutes one of the main renewable raw materials employed for the production of biobased products, notably food additives and pharmaceuticals.124 Hydrolysis of sucrose leads to a 1 1 mixture of glucose and fructose, termed invert sugar and, depending on the reaction conditions, the subsequent formation of 5-hydroxymethylfurfural (HMF) as a by-product resulting from dehydration of fructose. HMF is a versatile intermediate used in industry, and can be derivatized to yield a number of polymerizable furanoid monomers. In particular, HMF has been used in the manufacture of special phenolic resins.125... 

An interesting feature of the copper(0)/cellulose is that particles of colloidal dimensions are easily accessible yet heterogeneous with respect to aqueous reaction mixtures. V/e were interested in extending our work to include the preparation of cellulose containing very small particles of the catalytically active noble metals we describe here the preparation and properties of platinum-containing cellulose. 

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