Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing an amine, comprising the reductive amination of the corresponding carbonyl or alcohol containing a considerable amount (at least 50 ppm, especially organically bound) of a halogen, by which the amine can simply be produced at a low cost in reduced catalyst consumption rate and in a high yield. SOLUTION: This method for producing the amine of formula (I): R R CH- NR R (I) (R , R , R and R are each, for example, a 1 to 12C alkyl), comprising the catalytic reductive amination of a mixture of a carbonyl compound of formula (II): R -C(=O)-R and/or an alcohol of formula (III): R -CH(OH)-R with at least 50 ppm (based on the mixture) of a halogen in the presence of a Co- and/or Ni-containing catalyst with a nitrogen compound of formula (IV): HNR R , is characterized in that the reductive animation is carried out in the additive presence of a solid acidic cocatalyst.
Abstract:
PROBLEM TO BE SOLVED: To provide an improved method for producing a pyrrole and a pyridine. SOLUTION: This method for producing the pyrrole of formula (I) by dehydrogenating a pyrrolidine of formula (II), or producing the pyridine of formula (III) by dehydrogenating a piperidine of formula (VI), in the presence of a noble metal catalyst is substantially carried out in the presence of 1-50 wt.% water based on the total of the pyrrolidine and the water or the piperidine and the water respectively.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for purifying N-vinyl-ε-caprolactam for producing an N-vinyl-ε-caprolactam hardly manifesting any sensibility for color changes, i.e., having high color stability higher than that of usual N-vinyl-ε-caprolactam obtained by distillation. SOLUTION: N-vinyl-ε-caprolactam to be purified having at least 95 mass % purity is changed to a molten liquid, which is partially crystallized and the crystal is separated from the mother liquid. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To obtain an alkenyl compound stabilized in a color number having a remarkably low color number for expressing no tendency to be colored after a storage of longer period of several months or extremely slight coloration with avoiding an expensive cost. SOLUTION: The color number of an alkenyl compound having a divalent or a trivalent heteroatom at α position to a double bond is stabilized and/or lowered mixing an oxidizing agent with the alkenyl compound.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for giving a purified alkenyl compound having a very low color number, without having defects described in detailed description of this invention and without incurring a high cost. SOLUTION: When an alkenyl compound having a divalent or trivalent heteroatom at α-position based on the double bond is purified, distillation is carried out at least two times and the purified compound is obtained from a vapor phase by condensation. The time between the first distillation after the synthesis of the alkenyl compound and at least one further distillation is at least one day, and the purified alkenyl compound has an APHA color number of
Abstract:
The invention relates to a method for the hydrogenation of unsubstituted or at least monoalkyl substituted uni- or poly-nuclear aromatics by means of bringing the above at least one aromatic into contact with a gas containing hydrogen, in the presence of a catalyst comprising at least one metal of sub-group VIII of the periodic system as active metal, supported on a structured or monolithic support.
Abstract:
A method for the production of cycloaliphatic compounds (I) having side chains with expoxy groups by heterogenous-catalytic hydrogenation of a compound (II) having at least one carbocyclic, aromatic group and at least one side chain with at least one epoxy group, on a ruthenium catalyst, characterized in that the ruthenium catalyst is obtained by i) single or multiple treatment of an amorphous silicon dioxide based carrier material with a halogen-free aqueous solution of a low-molecular ruthenium compound and subsequent drying of the treated carrier material at a temperature of less than 200 DEG C, ii) reduction of the solid obtained in I) with hydrogen at a temperature ranging from 100 to 350 DEG C, wherein step ii) is carried out directly after step i).
Abstract:
A method for the production of cycloaliphatic compounds (I) having side chains with expoxy groups by heterogenous-catalytic hydrogenation of a compound (II) having at least one carbocyclic, aromatic group and at least one side chain with at least one epoxy group, on a ruthenium catalyst, characterized in that the ruthenium catalyst is obtained by i) single or multiple treatment of an amorphous silicon dioxide based carrier material with a halogen-free aqueous solution of a low-molecular ruthenium compound and subsequent drying of the treated carrier material at a temperature of less than 200 DEG C, ii) reduction of the solid obtained in I) with hydrogen at a temperature ranging from 100 to 350 DEG C, wherein step ii) is carried out directly after step i).
Abstract:
A process for the hydrogenation of a monocyclic or polycyclic aromatic which may be unsubstituted or substituted by at least one aikyi group comprises bringing the aromatic into contact with a hydrogen-containing gas in the presence of a catalyst comprising at least one metal of transition group VIII of the Periodic Table as active metal applied to a structured or monolithic support.