Abstract: There is provided a method for producing isobutylene, in which isobutylene is produced from isobutanol with a high selectivity while suppressing a decrease in the isobutanol conversion rate under pressure. In the method for producing isobutylene according to the present invention, a raw material gas containing isobutanol is brought into contact with a catalyst to produce isobutylene from isobutanol, the method including bringing the raw material gas containing isobutanol into contact with a catalyst at a linear velocity of 1.20 cm/s or more under a pressure of 120 kPa or more in terms of absolute pressure to produce isobutylene from isobutanol.

Abstract: There is provided a catalyst having an average electronegativity of 2.1 or more and 2.8 or less.

Abstract: There is provided a catalyst that enables the production of isobutylene with a high selectivity in the production of isobutylene by dehydration of isobutanol. The catalyst according to the present invention contains at least one metal selected from Group 6 to Group 14 metal elements in Period 4 to Period 6 of the periodic table, in alumina which includes alumina consisting of one or more crystal phases of a monoclinic crystal phase, a tetragonal crystal phase, and a cubic crystal phase.

Abstract: The invention discloses a catalyst comprising a silica support, a modifier metal and a catalytic alkali metal. The silica support has a multimodal pore size distribution comprising a mesoporous pore size distribution having an average pore size in the range 2 to 50 nm and a pore volume of said mesopores of at least 0.1 cm3/g, and a macroporous pore size distribution having an average pore size of more than 50 nm and a pore volume of said macropores of at least 0.1 cm3/g. The level of catalytic alkali metal on the silica support is at least 2 mol %. The modifier metal is selected from Mg, B, Al, Ti, Zr and Hf. The invention also discloses a method of producing the catalyst, a method of producing an ethylenically unsaturated carboxylic acid or ester in the presence of the catalyst, and a process for preparing an ethylenically unsaturated acid or ester in the presence of the catalyst.

Abstract: A process for producing a catalyst including a) providing an uncalcined metal modified porous silica support wherein the modifier metal is selected from one or more of boron, magnesium, aluminium, zirconium, hafnium and titanium, wherein the modifier metal is present in mono- or dinuclear modifier metal moieties; b) optionally removing any solvent or liquid carrier from the modified silica support; c) optionally drying the modified silica support; d) treating the uncalcined metal modified silica support with a catalytic metal to effect adsorption of the catalytic metal onto the metal modified silica support; and e) calcining the impregnated silica support of step d). The invention extends to an uncalcined catalyst intermediate and a method of producing a catalyst by providing a porous silica support having isolated silanol groups.

Abstract: The present invention is a catalyst comprising: (i) a compound comprising at least one first metal element selected from boron, magnesium, zirconium, and hafnium, and (ii) an alkali metal element, wherein the compound and the alkali metal element are supported on a carrier having silanol groups, an average particle size of the compound of the first metal element is 0.4 nm or more and 50 nm or less, the catalyst satisfies the following formula (1): 0.90×10?21 (g/number)?X/(Y×Z)<10.8×10?21 (g/number) ??formula (1), in which X is a molar ratio of the alkali metal element to the at least one first metal element in the catalyst, Y is a BET specific surface area of the catalyst (m2/g), and Z is a number of the silanol groups per unit area (number/nm2).

Abstract: Provided are: a catalyst for dehydration, with which isobutylene is able to be produced with high conversion and high selectivity through a dehydration reaction of isobutanol; and a method for producing isobutylene. This catalyst has a BET specific surface area within the range of from 210 m2/g to 350 m2/g (inclusive) as calculated from N2 adsorption/desorption isotherms. It is preferable that this catalyst is formed of at least one substance selected from among alumina, silica alumina, zeolite, and solid phosphoric acid. It is more preferable that this catalyst contains alumina, and it is especially preferable that this catalyst is formed of alumina. In this method for producing isobutylene, the isobutanol concentration in the starting material gas is preferably 20% by volume or more, more preferably 40% by volume or more, and especially preferably 60% by volume or more. In addition, the temperature of a catalyst layer is preferably from 230° C. to 370° C. (inclusive), and more preferably from 240° C.

Abstract: The purpose of the present invention is to provide a method that can produce, with high yield or high selectivity isobutylene by means of isobutanol dehydration-reaction. An isobutylene production method of a first embodiment of the present invention is a method for producing isobutylene by means of isobutanol dehydration-reaction, wherein isobutanol is reacted using a catalyst for which the BET specific surface area is within the range of 60 m2/g-175 m2/g, and the reaction is carried out under a reaction pressure of 50 kPa-750 kPa as the absolute pressure. An isobutylene production method of a second embodiment of the present invention includes: using a catalyst which is filled into a reaction chamber and for which the particle diameters of at least 90 mass % of the catalyst are within the range of 700 ?m-1000 ?m; setting the isobutanol concentration within a supplied reaction gas to 30 vol %-85 vol %; setting the weight hourly velocity (WHSV) of the isobutanol to 0.

Abstract: To provide a method for producing propionaldehyde directly from glycerol with high yield, gasified glycerol is brought into contact with a silica-type regular mesoporous body. More specifically, gasified glycerol is supplied to a catalyst layer containing a regular mesoporous body while heating the catalyst layer at a temperature ranging from 200 to 800° C. in such a manner that a W/F value can fall within the range from 0.001 to 1000 g·min/ml inclusive wherein W represents an amount (g) of a catalyst and F represents a supply rate (ml/min) of supplied glycerol.

Abstract: To provide a method for producing propionaldehyde directly from glycerol with high yield, gasified glycerol is brought into contact with a silica-type regular mesoporous body. More specifically, gasified glycerol is supplied to a catalyst layer containing a regular mesoporous body while heating the catalyst layer at a temperature ranging from 200 to 800° C. in such a manner that a W/F value can fall within the range from 0.001 to 1000 g·min/ml inclusive wherein W represents an amount (g) of a catalyst and F represents a supply rate (ml/min) of supplied glycerol.

Abstract: Provided are: a catalyst for dehydration, with which isobutylene is able to be produced with high conversion and high selectivity through a dehydration reaction of isobutanol; and a method for producing isobutylene. This catalyst has a BET specific surface area within the range of from 210 m2/g to 350 m2/g (inclusive) as calculated from N2 adsorption/desorption isotherms. It is preferable that this catalyst is formed of at least one substance selected from among alumina, silica alumina, zeolite, and solid phosphoric acid. It is more preferable that this catalyst contains alumina, and it is especially preferable that this catalyst is formed of alumina. In this method for producing isobutylene, the isobutanol concentration in the starting material gas is preferably 20% by volume or more, more preferably 40% by volume or more, and especially preferably 60% by volume or more. In addition, the temperature of a catalyst layer is preferably from 230° C. to 370° C. (inclusive), and more preferably from 240° C.

Abstract: Provided are a catalyst whereby isobutylene can be produced at high yield in a lower-temperature environment, and a method for producing isobutylene using the catalyst. The catalyst for producing isobutylene is an oxide including at least one element selected from molybdenum and tungsten, and at least one element selected from tantalum, niobium, and titanium.

Abstract: Provided are a catalyst whereby isobutylene can be produced at high yield in a lower-temperature environment, and a method for producing isobutylene using the catalyst. The catalyst for producing isobutylene is an oxide including at least one element selected from molybdenum and tungsten, and at least one element selected from tantalum, niobium, and titanium.

Abstract: The purpose of the present invention is to provide a method that can produce, with high yield or high selectivity isobutylene by means of isobutanol dehydration-reaction. An isobutylene production method of a first embodiment of the present invention is a method for producing isobutylene by means of isobutanol dehydration-reaction, wherein isobutanol is reacted using a catalyst for which the BET specific surface area is within the range of 60 m2/g-175 m2/g, and the reaction is carried out under a reaction pressure of 50 kPa-750 kPa as the absolute pressure. An isobutylene production method of a second embodiment of the present invention includes: using a catalyst which is filled into a reaction chamber and for which the particle diameters of at least 90 mass % of the catalyst are within the range of 700 ?m-1000 ?m; setting the isobutanol concentration within a supplied reaction gas to 30 vol %-85 vol %; setting the weight hourly velocity (WHSV) of the isobutanol to 0.

Abstract: Provided are a catalyst whereby isobutylene can be produced at high yield in a lower-temperature environment, and a method for producing isobutylene using the catalyst. The catalyst for producing isobutylene is an oxide including at least one element selected from molybdenum and tungsten, and at least one element selected from tantalum, niobium, and titanium.

Abstract: Provided is a method that produces a saturated aldehyde from a 1,2-alkanediol in high yield. Disclosed is a method for producing a saturated aldehyde from a 1,2-alkanediol in the presence of a regular mesoporous material.

Abstract: Provided is a method that produces a saturated aldehyde from a 1,2-alkanediol in high yield. Disclosed is a method for producing a saturated aldehyde from a 1,2-alkanediol in the presence of a regular mesoporous material.

Abstract: Provided are a catalyst whereby isobutylene can be produced at high yield in a lower-temperature environment, and a method for producing isobutylene using the catalyst. The catalyst for producing isobutylene is an oxide including at least one element selected from molybdenum and tungsten, and at least one element selected from tantalum, niobium, and titanium.

Abstract: Disclosed is a palladium-containing catalyst which enables to produce an ?,?-unsaturated carboxylic acid in high selectivity from an olefin or an ?,?-unsaturated aldehyde. Also disclosed are a method for producing such a catalyst and a method for producing an ?,?-unsaturated carboxylic acid using such a catalyst. Specifically disclosed is a palladium-containing catalyst containing 0.001 to 0.25 mole of antimony element to 1 mole of palladium element or a palladium-containing catalyst containing palladium element which composes a metal, tellurium element, and bismuth element.

Abstract: Disclosed is a palladium-containing catalyst which enables to produce an ?,?-unsaturated carboxylic acid in high selectivity from an olefin or an ?,?-unsaturated aldehyde. Also disclosed are a method for producing such a catalyst and a method for producing an ?,?-unsaturated carboxylic acid using such a catalyst. Specifically disclosed is a palladium-containing catalyst containing 0.001 to 0.25 mole of antimony element to 1 mole of palladium element or a palladium-containing catalyst containing palladium element which composes a metal, tellurium element, and bismuth element.