Abstract: The present invention relates to a method for producing methacrolein and/or methacrylic acid characterized in that the catalyst filling length of a dehydration catalyst layer is 3 to 20% of the catalyst filling length of an oxidation catalyst layer in a method where raw material gas containing gaseous t-butanol is supplied to a fixed-bed multitubular reactor having a dehydration catalyst layer and an oxidation catalyst layer in this order, from the entrance for raw material gas toward the exit, to produce methacrolein and/or methacrylic acid by dehydration reaction and catalytic gas phase oxidation reaction, and the present invention can increase the conventional yield of approximately 80% to 81 to 82% even when a reaction bath temperature is relatively low (approximately 355° C.).

Abstract: Provided is a catalyst which can prevent a lowering in selectivity for a target product in a gas phase catalytic reaction and has an excellent frictional resistance. A catalyst which is a supported catalyst comprising an inert support that is coated with a catalyst powder, characterized in that the inert support is ring-shaped and has an outer periphery that is curved in the lengthwise direction of the support, and the catalyst is produced by granulation in a moisten environment. The above described catalyst is useful in the gas phase oxidation of propylene, isobutylene, tertiary-butyl alcohol or methyl tertiary-butyl ether to thereby produce an unsaturated aldehyde corresponding thereto, or in the gas phase oxidation of such an unsaturated aldehyde as described above to thereby produce an unsaturated carboxylic acid.

Abstract: A bill deposit machine comprising: a deposit/return port for accepting and returning a batch of bills, a bill transport path for transporting the batch of bills accepted at said deposit/return port with the wide dimension of the bills parallel to the transport path horizontally and in a straight line, a feed-out section for feeding out the bills, one at a time, out of the batch of bills received from said bill transport path, a discriminating unit for discriminating if the bills fed out of said feed-out section can be deposited or not, and a bill returning path for transporting the rejected bills, which are determined by said discriminating unit as being unable to be deposited, to said bill transport path. Bills are projected and kept to be projected out of said deposit/return port by the specified amount by said bill conveying device when the movement of the bills which are being taken out of said deposit/return port is detected by said takeout detecting device.

Abstract: The object of the present invention is to provide a catalyst for producing methacrylic acid in high yield and highly selectively by subjecting methacrolein, isobutylaldehyde or isobutyric acid to gas phase catalytic oxidation, and the preparation method thereof. The catalyst contains Mo, V, P, Cu, Cs and NH4 as the essential, active components, and the feature is to use for preparing the catalyst a cesium weak acid salt or cesium hydroxide as the Cs raw material and ammonium acetate as the NH4 raw material. A coated catalyst of the present invention is obtainable by supporting the active component on an inert carrier of alumina or the like.

Abstract: An object of the present invention is to provide a highly active catalyst for producing an unsaturated oxygen-containing compound from an alkane and the catalyst comprising Mo, V, Ti and Sb or Te as the indispensable active components. The preferable catalyst is represented by formula (1) or (2) as shown below, Mo1.0VaTibXcYdOe??(1) Mo1.0VaTibXcYdZfOe??(2) wherein X represents Sb or Te; Y represents Nb, W or Zr; Z represents Li, Na, K, Rb, Cs, Mg, Ca or Sr; a, b, c, d, e and f represent atomic ratios of their respective elements, with 0<a<0.7, 0<b<0.3, 0<c<0.7, 0?d<0.3, 0<f<0.1; e is a number determined by oxidation states of the other elements than oxygen.

Abstract: The present invention relates to a method for producing methacrolein and/or methacrylic acid characterized in that the catalyst filling length of a dehydration catalyst layer is 3 to 20% of the catalyst filling length of an oxidation catalyst layer in a method where raw material gas containing gaseous t-butanol is supplied to a fixed-bed multitubular reactor having a dehydration catalyst layer and an oxidation catalyst layer in this order, from the entrance for raw material gas toward the exit, to produce methacrolein and/or methacrylic acid by dehydration reaction and catalytic gas phase oxidation reaction, and the present invention can increase the conventional yield of approximately 80% to 81 to 82% even when a reaction bath temperature is relatively low (approximately 355° C.).

Abstract: The object of the present invention is to provide a method for preparing a catalyst for producing methacrylic acid by subjecting methacrolein, isobutyl aldehyde or isobutyric acid to gas phase catalytic oxidation with high yield and high selectivity. A method for preparing a catalyst for producing methacrylic acid by subjecting methacrolein, isobutyl aldehyde or isobutyric acid to gas phase catalytic oxidation, the method comprising: (a) a step of blending compounds each containing any one of Mo, V, P, Cu, Cs or NH4 with water to prepare an aqueous solution or dispersion of the compounds (hereinafter referred to, both included, as a slurry); (b) a step of drying the slurry obtained in the step (a) to obtain a dried slurry; (c) a step of calcining the dried slurry obtained in..

Abstract: An object of the present invention is to provide a highly active catalyst for producing an unsaturated oxygen-containing compound from an alkane and the catalyst comprising Mo, V, Ti and Sb or Te as the indispensable active components. The preferable catalyst is represented by formula (1) or (2) as shown below, Mo1.0VaTibXcYdOe??(1) Mo1.0VaTibXcYdZfOe??(2) wherein X represents Sb or Te; Y represents Nb, W or Zr; Z represents Li, Na, K, Rb, Cs, Mg, Ca or Sr; a, b, c, d, e and f represent atomic ratios of their respective elements, with 0<a<0.7, 0<b<0.3, 0<c<0.7, 0?d<0.3, 0<f<0.1; e is a number determined by oxidation states of the other elements than oxygen.

Abstract: The object of the present invention is to provide a catalyst for producing methacrylic acid in high yield and highly selectively by subjecting methacrolein, isobutylaldehyde or isobutyric acid to gas phase catalytic oxidation, and the preparation method thereof. The catalyst contains Mo, V, P, Cu, Cs and NH4 as the essential, active components, and the feature is to use for preparing the catalyst a cesium weak acid salt or cesium hydroxide as the Cs raw material and ammonium acetate as the NH4 raw material. A coated catalyst of the present invention is obtainable by supporting the active component on an inert carrier of alumina or the like.

Abstract: The present invention relates to a catalyst for producing methacrylic acid by the vapor-phase catalytic oxidation of methacrolein, comprising Mo, V, P and Cu as the indispensable active components, wherein copper acetate is used for all or a part of the necessary amount of a material for said Cu, a coated catalyst and a method for manufacturing the coated catalyst, and methacrolein is reacted in a high conversion and methacrylic acid is produced in a high selectivity by use of the catalyst of the present invention, and the catalyst can be used for reaction under high loading condition.

Abstract: An object of the present invention is to provide a catalyst that is highly active and has a large mechanical strength. The catalyst of the present invention contains molybdenum, vanadium, copper and antimony as the essential components, being produced by using antimony acetate for an antimony source material and preferably used for producing acrylic acid by vapor-phase catalytic oxidation of acrolein.

Abstract: An object of the present invention is to provide a highly active catalyst for producing an unsaturated oxygen-containing compound from an alkane and the catalyst comprising Mo, V, Ti and Sb or Te as the indispensable active components.

Abstract: The present invention relates to a catalyst for producing methacrylic acid by the vapor-phase catalytic oxidation of methacrolein, comprising Mo, V, P and Cu as the indispensable active components, wherein copper acetate is used for all or a part of the necessary amount of a material for said Cu, a coated catalyst and a method for manufacturing the coated catalyst, and methacrolein is reacted in a high conversion and methacrylic acid is produced in a high selectivity by use of the catalyst of the present invention, and the catalyst can be used for reaction under high loading condition.

Abstract: An object of the present invention is to provide a catalyst that is highly active and has a large mechanical strength. The catalyst of the present invention contains molybdenum, vanadium, copper and antimony as the essential components, being produced by using antimony acetate for an antimony source material and preferably used for producing acrylic acid by vapor-phase catalytic oxidation of acrolein.

Abstract: A bill deposit machine comprising: a deposit/return port for accepting and returning a batch of bills, a bill transport path for transporting the batch of bills accepted at said deposit/return port with the wide dimension of the bills parallel to the transport path horizontally and in a straight line, a feed-out section for feeding out the bills, one at a time, out of the batch of bills received from said bill transport path, a discriminating unit for discriminating if the bills fed out of said feed-out section can be deposited or not, and a bill returning path for transporting the rejected bills, which are determined by said discriminating unit as being unable to be deposited, to said bill transport path. A bill conveying device and a thickness detecting device for detecting the thickness of the batch of bills inserted into said deposit/return port are disposed at said deposit/return port.

Abstract: The present invention concerns a method for producing acrolein and acrylic acid by carrying out vapor phase catalytic oxidation of propylene with molecular oxygen or a gas containing molecular oxygen using a oxidation catalysts comprising Mo, Bi and Fe as an essentially element and a fixed bed multitubular reactor, which comprisesa) using a plurality of supported catalysts having different activities, which was obtained, for example, by different calcination method in the production process of the supported catalysts,b) setting a catalyst layer in a reaction tube, which is formed by dividing it into plural portions in the tube axial direction, andc) arranging the aforementioned plural supported catalysts in such order that the activity becomes high toward the outlet from the inlet of the material gas in the reaction tube axial direction.

Abstract: A catalyst having a high activity and mechanical strength and a process for preparing it are provided. The catalyst comprises molybdenum, vanadium, copper and antimony as essential components. The peak in X-ray diffractometry of the catalytically active component with Cu--K.alpha. line is largest at 22.2.+-.0.30.degree. (2.theta.).

Abstract: A catalyst for the production of unsaturated aldehyde and unsaturated acid, obtained by loading a catalytically active component on a carrier and calcining the loaded catalyst, characterized by an average particle diameter of the catalyst of 4 to 16 mm, an average particle diameter of the carrier of 3 to 12 mm, a calcining temperature of 520 to 600.degree. C. and an amount of the catalytically active component loaded on the carrier of 5 to 80% by weight ?weight of the catalytically active component)/(weight of the catalytically active component+weight of the carrier+weight of a strength improver)!, and a process for producing unsaturated aldehyde and unsaturated acid with the catalyst.

Abstract: The present invention relates to a process for producing methacrylic acid by oxidizing methacrolein in vapor phase with molecular oxygen or a gas containing molecular oxygen, characterized in that the oxidation is carried out in the presence of a catalyst having a composition shown by the following formula:Mo.sub.a V.sub.b P.sub.c X.sub.d Y.sub.e O.sub.fwherein Mo, V, P and O respectively represent molybdenum, vanadium, phosphorus and oxygen; X represents at least one element selected from the group consisting of potassium, rubidium, cesium, and thallium; Y represents at least one element selected from the group consisting of copper, silver, tin, thorium, germanium, nickel, iron, cobalt, titanium, rhenium, chromium, cerium, antimony and magnesium; and a, b, c, d, e and f denote the atomic ratio of respective elements where, a is 10, b is a number of 6 or less than 6 excluding 0, preferably 0.5 to 3, c is a number of 0.5 to 6, preferably 0.5 to 3, d is a number of 0.5 or less than 0.