Abstract:
A method for producing 4,4'-dibromobiphenyl, which comprises reacting biphenyl and from 2 to 3 mol times, relative to biphenyl, of bromine in a halogenated hydrocarbon solvent in the presence of a catalyst which is a simple substance of an element selected from the group consisting of antimony, titanium, tin and zinc, or a compound of the element.
Abstract:
A p-substituted halobenzene derivative, which is very valuable in industry, can be obtained by halogenation of benzene and/or a benzene derivative in a liquid phase at the temperature of 0 to 200.degree.C at a higher selectivity and yield than in known process, using, as a catalyst, an L type zeolite alkali-treated with an alkali solution of pH 11 or above at the temperature of 0 to 100.degree.C for 0.5 to 100 hours.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for simply producing a partly hydrophilic adsorbent, to provide a method for producing a double-structure adsorbent comprising the above adsorbent, and to provide a method for producing a double-structure adsorbent and the like excellent in biocompatibility. SOLUTION: Porous particles comprising an organic compound showing the property of contracting in a solvent based on water and of swelling in a solvent based on an organic solvent are used as a raw material. Sites reactive with any compound selected from the group consisting of a hydroxy-containing compound, an amino-containing compound, a carboxy-containing compound, a halogen-group-containing compound, and an epoxy-containing compound are freshly formed by treatment in a solvent based on an organic solvent. The resultant particles are reacted with a compound having an alcoholic OH group in a solvent based on water to fix the compound to the outer surfaces of the particles. COPYRIGHT: (C)2003,JPO
Abstract:
PURPOSE:To reduce an undesirable influence of a catalyst on material components caused by corrosion of reactor materials in obtaining the title compound from ethyleneamine and ethanolamine using a solid bed flow type reactor by packing alumina to the upper stream side of a catalytic layer. CONSTITUTION:In producing a polyethylene polyamine from ethyleneamine and ethanolamine by a solid bed flow type reactor using an acid catalyst, alumina is packed into the upper stream side of a catalytic layer, preferably from part (namely part heated to high temperature of >=100 deg.C) causing metal corrosion to the catalytic layer and material components eluted by the corrosion of reactor materials are adsorbed. Consequently, reduction in catalytic activity and reduction in catalytic selectivity caused by adsorption of the material components on the catalyst are reduced.
Abstract:
PROBLEM TO BE SOLVED: To provide an anion exchanger having large adsorption amount of biopolymer such as protein and excellent separation capacity.SOLUTION: Dimethylamine epichlorohydrin polymer and/or dimethylamine ethylenediamine epichlorohydrin polymer is bound to a carrier for chromatography.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a para-substituted halogenated benzene derivative under an industrially advantageous mild condition by using an inexpensive zeolite and an additive in high para-selectivity. SOLUTION: This method for halogenating a monosubstituted benzene derivative by bringing the monosubstituted benzene derivative into contact with a halogen in the presence of a zeolite in liquid phase to halogenate the benzene derivative is carried out in the coexistence of an aliphatic nitro compound in a liquid phase. Preferably, the halogen is chlorine, the monosubstituted benzene derivative is (1-bromoethyl)benzene and/or (2-bromoethyl)benzene, and the zeolite is an L-type zeolite.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a para-substituted halogenated benzene derivative in high yield at high conversion rates of raw materials in high selectivity of reaction by reacting a benzene derivative with a halogen in the presence of a specific catalyst and A-type zeolite in liquid phase. SOLUTION: This derivative is obtained by reacting (A) a benzene derivative with (B) a halogen in the presence of (C) pref. 0.5 to 100 wt.% of zeolite catalyst based on the component A and (D) pref. 0.1 to 20 wt.% of zeolite based on the component A in a liquid phase (of e.g. methylene chloride). The component A is pref. an alkylated benzene, more pref., toluene or ethyl benzene. The component B is pref. chlorine or bromine. The component C is pref. a Y-type zeolite or L-type zeolite. The component D is pref. a NaA-type zeolite and/or CaA-type zeolite.