摘要:
The present invention provides a process for the preparation of pure 2,6-dichlorobenzonitrile by the ammonoxidation of 2,6-dichlorotoluene in the presence of a catalyst based on vanadium-molybdenum oxide, wherein the reaction is carried out in a fluidized bed process and water is sprayed into the reaction gases after leaving the fluidized bed reactor.
摘要:
NITRILES OF FORMULA YCN WHERE Y IS ALKYLPHENYL OR ALKENYL OF FORMULA
R2-C(-R3)=C(-R1)-
WHERE R1, R2 AND R3 ARE HYDROGEN OR ALKYL, AT LEAST ONE BEING METHYL, ARE OBTAINED BY VAPOUR PHASE AMMOXIDATION USING OXYGEN AND AMMONIA IN THE PRESENCE, AS CATALYST, OF AT LEAST ONE ELEMENT OF GROUPS I-B, III-A, III-B, IV-A, IV-B, V-A, V-B OR VI-B OF THE PERIODIC TABLE OR OF IRON OR OF AT LEAST ONE DERIVATIVE THEREOF.
摘要:
A manufacturing method of a nitrile compound comprising a first step of introducing a raw material gas containing a cyclic compound having an organic substituent, ammonia, and air into a reactor and reacting the raw material gas in the presence of a catalyst to generate the nitrile compound, a second step of discharging a reacted gas from the reactor and separating the nitrile compound from the reacted gas, and a third step of collecting mist from a first residual gas obtained by separating the nitrile compound from the reacted gas to remove water and ammonium carbonate in the first residual gas.
摘要:
A process provides for minimizing an amount of fuel gas utilized in an absorber off-gas incinerator and better control of emissions. The process provides for less temperature deviations in the absorber off-gas incinerator firebox and for less deviation in an amount of oxygen in the absorber off-gas incinerator stack gas.
摘要:
In the production method of the invention, a cyclic aldehyde having an alkyl group and/or a cycloalkyl group directly bonded to a skeletal ring and a formyl group directly bonded to the skeletal ring is brought into contact with ammonia and oxygen in vapor phase in the presence of a catalyst. As a result thereof, the formyl group is selectively ammoxidized into a cyano group to convert the cyclic aldehyde into a corresponding cyclic nitrile. The method enables a long-term, high-yield production of the cyclic nitrile using a reduced amount of ammonia.
摘要:
A catalyst comprising a promoted mixed metal oxide is useful for the vapor phase oxidation of an alkane or a mixture of an alkane and an alkene to an unsaturated carboxylic acid and for the vapor phase ammoxidation of an alkane or a mixture of an alkane and an alkene to an unsaturated nitrile.
摘要:
A method of preparing a catalyst having the elements and the proportions indicated by the following empirical formula:VSb.sub.m A.sub.a D.sub.d O.sub.xwhereA is one or more Ti, Sn, where Sn is always presentD is one or more Li, Mg, Ca, Sr, Ba, Co, Fe, Cr, Ga, Ni, Zn, Ge, Nb, Zr, Mo, W, Cu, Te, Ta, Se, Bi, Ce, In, As, B, Al and Mn whereinm is 0.5 to 10a is greater than zero to 10d is zero to 10x is determined by the oxidation state of the cations present,comprising making an aqueous slurry of a mixture of source batch materials comprising compounds of said elements to be included in the final catalyst, followed by drying and heat calcining the mixture to an active catalyst, wherein the source batch material for the tin is a solution which comprises SnO.sub.2.xH.sub.2 O wherein x.gtoreq.0 dispersed in tetraalkyl ammonium hydroxide wherein the tetraalkyl ammonium hydroxide is defined by the following formula:C.sub.n H.sub.2n+1 NOHwherein 5.gtoreq.n.gtoreq.1,drying said slurry and calcining the mixture to an upper calcination temperature of at least 500.degree. C.
摘要:
This invention relates to a method for preparing acrylonitrile by ammoxydation using a multi-story quenching tower. The method comprises the steps of supplying the reacted gas into the first quenching chamber of the multi-story quenching tower, said first quenching chamber has a water supply pipe equipped with spray nozzles at a two-dimensional density of more than 2 nozzles/m.sup.2 for the sectional area of the multi-story quenching tower and contacting the reacted gas with 5 T or more of water per 1 T of the reacted gas fed from the nozzles.
摘要:
Disclosed is a process for making an aromatic nitrile by reacting a benzotrichloride with an ammonium halide in the presence of an oxygen-donating initiator at a temperature of about 150.degree. to about 250.degree. C. An optional catalyst of a metal oxide or a metal salt can be used if desired.
摘要:
A method of preparing a catalyst having the elements and the proportions indicated by the following empirical formula: VSb.sub.m A.sub.a D.sub.d O.sub.x where A is one or more Ti, Sn, where Sn is always present D is one or more Li, Mg, Ca, Sr, Ba, Co, Fe, Cr, Ga, Ni, Zn, Ge, Nb, Zr, Mo, W, Cu, Te, Ta, Se, Bi, Ce, In, As, B, Al and Mn wherein m is 0.5 to 10 a is greater than zero to 10 d is zero to 10 x is determined by the oxidation state of the cations present, comprising making an aqueous slurry of a mixture of source batch materials comprising compounds of said elements to be included in the final catalyst, followed by drying and heat calcining the mixture to an active catalyst, wherein the source batch material for the tin is a solution which comprises SnO.sub.2.xH.sub.2 O wherein x.gtoreq.0 dispersed in tetraalkyl ammonium hydroxide wherein the tetraalkyl ammonium hydroxide is defined by the following formula: C.sub.n H.sub.2n+1 NOH wherein 5.gtoreq.n.gtoreq.1, drying said slurry and calcining the mixture to an upper calcination temperature of at least 500.degree. C.