Abstract:
Disclosed is a process for the vapor phase ammoxidation of a C₃ to C₅ paraffin to an α,β-unsaturated nitrile having 3-5 C atoms, using a particulate bismuth-vanadium oxide catalyst containing at least one other specified element.
Abstract:
Catalysts comprising multicomponent oxide catalysts are provided that are particularly effective in an oxidative process for the upgrading of low molecular weight alkanes to higher molecular weight hydrocarbons especially for the upgrading of methane to form ethane and ethylene and their subsequent upgrading to substantially liquid hydrocarbon products. The catalysts have the formula: wherein A is Pb, Bi, Sn, Sb, Tl, In, Mn, Cd, Ge or mixtures thereof; B is Mg, Ca. Sr. Ba. Zn. La, Ce, Sc, Y, Cu, Ni. Ti, Zr, Co, V or mixtures thereof; C is Li, Na, K, Rb, Cs or mixtures thereof; and wherein a is from about 0.1 to about 100; b is from about 0.1 to about 100; c is from 0.0 to about 100; and x is the number of oxygens needed to fulfill the valence requirements of the other elements. The process disclosed may be performed in the presence or absence of gaseous oxygen at elevated temperatures in a reactor containing the catalyst. The catalyst compositions remain stable for long periods of time.
Abstract:
Disclosed in a process for ammoxidation of paraffins containing 2-5 C atoms using a complex metal oxide catalyst having ingredients and 3-5 C atoms using a complex metal oxide catalyst which is essentially free of bismuth, and has the elements and the proportions which are represented by the following empirical formula: VSb m P n A a D b C c O x where A is one or more of W, Sn, B, Mo and As; D is one or more of Fe, Co, Ni, Cr, Cu, Mn, Zn, Se, Te, Pb and As; C is one or more of an alkali metal, Ca, Sr, Ba, Tl and where m is greater than 1 and up to 20; n is 0-10; a is 0.2-10; b is 0.5; c is 0-1; a is equal to or less than m; b is equal to or less than m; wherein x is determined by oxidation state of the other elements present, and wherein the antimony has an average valency higher than +3 and the vanadium has an average valency lower than +5, wherein A includes at least 0.2 atoms of W, crystalling Sb₂O₄ is present in said catalyst, and wherein the foregoing catalyst is on a specified inorganic oxide support material. Also disclosed is the catalyst and how to make it.
Abstract:
Disclosed is a process for the vapor phase ammoxidation of a C₃ to C₅ paraffin to an α,β-unsaturated nitrile having 3-5 C atoms, using a particulate bismuth-vanadium oxide catalyst containing at least one other specified element.
Abstract:
The process for the ammoxidation of a C 3 to C 5 paraffinic hydrocarbon to its corresponding α,β-unsaturated hydrocarbon comprising reacting the C 3 to C 5 paraffinic hydrocarbon with ammonia and oxygen in a fluid bed reactor at a temperature of between 250°C to 600°C in the presence of a catalyst having the empirical formula as follows:
V v Sb m A a D d O x
wherein
A when present is Sn and/or Ti D when present is one or more of Li, Mg, Na, Ca, Sr, Ba, Co, Fe, Cr, Ga, Ni, Zn, Ge, Nb, Zr, Mo, W, Cu, Te, Ta, Se, Bi, Ce, In, As, B, Al, P and Mn; and wherein v is 1, m is 0.5-75, a is 0 to 25, d is 0 to 25, and x is determined by the oxidation state of the cations present, and a minor quantity of an halogen-containing component, preferably characterized by the following formula:
R-X or X 2
where R=Hydrogen, C 1 -C 20 alkyl and X=F, Cl, Br, I or mixtures thereof.
Abstract:
Catalysts comprising multicomponent oxide catalysts are provided that are particularly effective in an oxidative process for the upgrading of low molecular weight alkanes to higher molecular weight hydrocarbons especially for the upgrading of methane to form ethane and ethylene and their subsequent upgrading to substantially liquid hydrocarbon products. The catalysts have the formula: wherein
A is Pb, Bi, Sn, Sb, Tl, In, Mn, Cd, Ge or mixtures thereof; B is Mg, Ca. Sr. Ba. Zn. La, Ce, Sc, Y, Cu, Ni. Ti, Zr, Co, V or mixtures thereof; C is Li, Na, K, Rb, Cs or mixtures thereof; and wherein a is from about 0.1 to about 100; b is from about 0.1 to about 100; c is from 0.0 to about 100; and x is the number of oxygens needed to fulfill the valence requirements of the other elements.
The process disclosed may be performed in the presence or absence of gaseous oxygen at elevated temperatures in a reactor containing the catalyst. The catalyst compositions remain stable for long periods of time.