Catalysts for producing methylamines and method for manufacturing the same
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsToshio Hidaka, Katsumi Higuchi, Takeshi Kawai
Life of this patent
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Abstract
Catalysts useful for producing methylamines and having practical catalyst life and large selectivity for dimethylamine comprise crystalline silicoaluminophosphate molecular sieves which have a molar ratio of silicon atom to aluminum atom in the range of 0.01-0.30.
Claims12
A catalyst for producing methylamines, which comprises a crystalline silicoaluminophosphate molecular sieve, the molar ratio of silicon atom to aluminum atom being in the range of 0.01-0.30.
A method for manufacturing a catalyst for producing methylamines which comprises mixing an aluminum compound, a phosphorus compound, a silicon compound, an amine or ammonium salt and water so that the molar ratio of them satisfies the following formula (1) in case the aluminum compound, the phosphorus compound and the silicon compound are expressed by Al2O3, P2O5 and SiO2, respectively, and then subjecting the mixture to a hydrothermal treatment:
- Al2O3.(1±0.2)P2O5.(0.5±0.4)SiO2.(1.5±0.5)Am.(75±25)H2O (1)
- wherein Am denotes an amine or ammonium salt having 3 to 24 carbon atoms.
A method for manufacturing a catalyst for producing methylamines which comprises mixing an aluminum compound, a phosphorus compound, a silicon compound, an amine or ammonium salt and water with at least one metal and/or a compound of the metal selected from Li, Na, Be, Mg, Ca, Sr, Y, Ti, zr, V, Nb, Cr, Mn, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Zn, B, Ga, In, Ge and Sn so that the molar ratio satisfies the following formula (1) in case the aluminum compound, the phosphorus compound and the silicon compound are expressed by Al2O3, P2O5 and SiO2, respectively, and then subjecting the mixture to a hydrothermal treatment:
- Al2O3.(1±0.2)P2O5.(0.5±0.45)SiO2.(1.5±0.5)Am.(75±25)H2O (1)
- wherein Am denotes an amine or ammonium salt having 3 to 24 carbon atoms.
Dependencies are inferred from the claim text.