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AssigneesUniversity of Delaware, E. I. Du Pont de Nemours and Company
InventorsHenry C. Foley, George C. Sonnichsen, Loren D. Brake, Ravindra K. Mariwala, David S. Lafyatis
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The present invention relates to an improved catalyst for the selective synthesis of monomethylamine (MMA) and dimethylamine (DMA) at the expense of trimethylamine (TMA) for a starting feed of methanol and/or dimethyl ether and ammonia. The current industrial catalyst for this process is a standard SiO.sub.2 /Al.sub.2 O.sub.3 material. The present invention combines this standard catalyst with microporous carbon molecular sieves (CMS) to form a composite material (i.e., a CMS/SiO.sub.2 /Al.sub.2 O.sub.3 material) with higher selectivity for the desired products MMA and DMA. The invention also relates to methods of making the improved catalyst and a process of using the improved catalyst material in the production of MMA and DMA.
A method of making a carbon molecular sieve/SiO.sub.2 /Al.sub.2 O.sub.3 catalyst material comprising
A method of making a carbon molecular sieve/SiO.sub.2 /Al.sub.2 O.sub.3 catalyst material comprising dropping hot pellets of a SiO.sub.2 /Al.sub.2 O.sub.3 catalyst material into a body of precursor material, wherein said precursor material is a material that will form carbon molecular sieve material when subjected to pyrolysis.
Dependencies are inferred from the claim text.