摘要:
The present invention is to provide an inorganic sintered material that excels in photocatalytic activity as compared with that exhibited in the use of a photocatalyst of titanium oxide only.It is provided an inorganic sintered material comprising a photocatalyst, wherein the photocatalyst comprising a base having photocatalytic activity; and a silicon oxide film covering the base, wherein the film is substantially pore-free, and wherein the photocatalyst has a alkali metal content of not less than 1 ppm but not more than 1,000 ppm.
摘要:
Disclosed is a photocatalyst comprising a photocatalytically active base, and a silicon oxide film covering the base and substantially having no pores. The alkali metal content of the photocatalyst is not less than 1 ppm but not more than 1,000 ppm. Also disclosed is a method for producing such a photocatalyst wherein when a photocatalytically active base present in an aqueous medium is coated with a silicon oxide film by using a silicate, the pH of the aqueous medium containing both the photocatalytically active base and the silicate is maintained at 5 or below.
摘要:
The present invention is to provide a photocatalyst-containing organic material which is suppressed in the decomposition or deterioration of an organic substance being in contact with a photocatalyst with the photocatalytic function retained. It is provided a photocatalyst-containing organic material comprising a member comprising an organic substance; and a photocatalyst contained in the member, wherein said photocatalyst comprising a base having photocatalytic activity; and a silicon oxide film covering the base, wherein the film is substantially pore-free, and wherein the photocatalyst has a alkali metal content of not less than 1 ppm but not more than 1,000 ppm.
摘要:
Disclosed is a photocatalyst comprising a photocatalytically active base, and a silicon oxide film covering the base and substantially having no pores. The alkali metal content of the photocatalyst is not less than 1 ppm but not more than 1,000 ppm. Also disclosed is a method for producing such a photocatalyst wherein when a photocatalytically active base present in an aqueous medium is coated with a silicon oxide film by using a silicate, the pH of the aqueous medium containing both the photocatalytically active base and the silicate is maintained at 5 or below.
摘要:
The invention provides a chlorine production catalyst that shows excellent reaction activity in the oxidation reaction of hydrogen chloride with oxygen into chlorine, is inexpensive and can be supplied stably, and is suited for use in a fluidized-bed reactor. The invention also provides a chlorine production process using the catalyst. The chlorine production catalyst of the invention includes spherical particles containing copper element (A), an alkali metal element (B) and a lanthanoid element (C) and having an average sphericity of not less than 0.80. The lanthanoid element (C) has a bond dissociation energy with oxygen at 298 K of 100 to 185 kcal/mol. The content of the copper element (A) in the catalyst is 0.3 wt % to 4.5 wt %.
摘要:
The invention provides a chlorine production catalyst that shows excellent reaction activity in the oxidation reaction of hydrogen chloride with oxygen into chlorine, is inexpensive and can be supplied stably, and is suited for use in a fluidized-bed reactor. The invention also provides a chlorine production process using the catalyst. The chlorine production catalyst of the invention includes spherical particles containing copper element (A), an alkali metal element (B) and a lanthanoid element (C) and having an average sphericity of not less than 0.80. The lanthanoid element (C) has a bond dissociation energy with oxygen at 298 K of 100 to 185 kcal/mol. The content of the copper element (A) in the catalyst is 0.3 wt % to 4.5 wt %.
摘要:
A catalyst has high activity and is suitable for use in producing chlorine by oxidizing hydrogen chloride with oxygen. The catalyst includes copper, an alkali metal and a rare earth and has pores of which pores having a diameter of 5 to 15 nm have a pore volume of 0.4 to 2.0 ml/g.
摘要:
An efficient method for the preparation of 1,2-benzisoxazole-3-methanesulfonic acid involves a reaction of 1,2-benzisoxazole-3-acetic acid in toluene with chlorosulfonic acid optionally mixed with an inert solvent in the presence of a particular Lewis base (ester or a nitrile).
摘要:
This invention relates to pyridonecarboxylic acid derivatives of the following general formula, esters thereof and salts thereof, as well as pharmaceutical preparations containing them. ##STR1## wherein: R is cycloalkyl which may be substituted by halogen, or the like;X is hydrogen, lower alkyl, amino or the like;Y is hydrogen or halogen;A is nitrogen or a group of the formula C--Z in which Z is lower alkoxy that may be substituted by halogen, or the like;R.sub.1 and R.sub.2 may be the same or different and are each hydrogen or the like;R.sub.3 is hydrogen or lower alkyl;R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8 and R.sub.9 may be the same or different and are each hydrogen, halogen or lower alkyl;m is 0 or 1; andn and p may be the same or different and are each 0 or 1.This invention also relates to bicyclic amine compounds useful as direct intermediates for the synthesis of the above-described pyridonecarboxylic acid derivatives.
摘要:
A composite oxide catalyst represented by the general formula: Mo-V-P-X-Y (wherein X represents at least one element selected from the group consisting of Sb, Cu, Co, Bi and As; Y represents at least one element selected from the group consisting of K, Rb, Cs and Tl) and a method for preparing methacrylic acid through gas phase catalytic oxidation of methacrolein with molecular oxygen in the presence of the foregoing catalyst are herein disclosed. The catalyst exhibits excellent catalytic activity, selectivity to methacrylic acid, catalytic stability and lifetime.