Mitsubishi Rayon Company, Limited

Mitsubishi Chemical Corporation

Hokkaido University

Tokushima University

Wataru Ninomiya

Ken Ooyachi

Toshiya Yasukawa

Yoshiyuki Himeno

Akio Takeda

Toshiki Matsui

Wataru Ueda

Shuji Akihara

Yuji Fujimori

Tatsuya Suzuki

Toru Murayama

Shigeru Sugiyama

Akio Hayashi

David William Johnson

Kenichi Miyaki

Seiichi Kawato

Toshio Hasegawa

Masaya Fujisue

Yuuki Katou

Yuki Kato

Mai Kojima

Norimichi Kawabe

Jonathan Runnacles

Kazufumi Nishida

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 cm/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 cm/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.

Catalyst and a process for the production of ethylenically unsaturated carboxylic acids or esters

The present invention is a catalyst comprising:

Catalyst, method for preparing catalyst, and method for producing unsaturated carboxylic acid and/or unsaturated carboxylic acid ester

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 m/g to 350 m/g (inclusive) as calculated from Nadsorption/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&#xb0; C. to 370&#xb0; C. (inclusive), and more preferably from 240&#xb0; C. to 360&#xb0; C. (inclusive).

Catalyst for isobutylene production and method for producing isobutylene

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 m/g-175 m/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 &#x3bc;m-1000 &#x3bc;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 0.175 h&#x2dc;20 h; and reacting isobutanol under a reaction pressure of 50 kPa-750 kPa as the absolute pressure.

Method for producing isobutylene from isobutanol

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&#xb0; C. in such a manner that a W/F value can fall within the range from 0.001 to 1000 g&#xb7;min/ml inclusive wherein W represents an amount (g) of a catalyst and F represents a supply rate (ml/min) of supplied glycerol.

Method for producing propionaldehyde

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.

Catalyst for producing isobutylene and method for producing isobutylene using the same

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.

Method for producing saturated aldehyde from 1,2-alkanediol

Disclosed is a palladium-containing catalyst which enables to produce an &#x3b1;,&#x3b2;-unsaturated carboxylic acid in high selectivity from an olefin or an &#x3b1;,&#x3b2;-unsaturated aldehyde. Also disclosed are a method for producing such a catalyst and a method for producing an &#x3b1;,&#x3b2;-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.

Palladium-containing catalyst, method for producing same, and method for producing &#x3b1;, &#x3b2;-unsaturated carboxylic acid

The present invention provides: a palladium-containing supported catalyst which is used for producing an &#x3b1;,&#x3b2;-unsaturated carboxylic acid from an olefin or an &#x3b1;,&#x3b2;-unsaturated aldehyde in high selectivity; a method for manufacturing the catalyst; and a method for producing an &#x3b1;,&#x3b2;-unsaturated carboxylic acid in high selectivity. In particular, the present invention resides in a method for manufacturing a palladium-containing supported catalyst for producing an &#x3b1;,&#x3b2;-unsaturated carboxylic acid from an olefin or an &#x3b1;,&#x3b2;-unsaturated aldehyde, comprising the step of reducing palladium oxide contained in a catalyst precursor wherein at least the palladium oxide is supported on a carrier. By using such a palladium-containing supported catalyst, an &#x3b1;,&#x3b2;-unsaturated carboxylic acid is produced through liquid-phase oxidation of an olefin or an &#x3b1;,&#x3b2;-unsaturated aldehyde with molecular oxygen.

Method for manufacturing palladium-containing catalyst

Palladium-containing catalyst, method for producing same, and method for producing &#x3b1;,&#x3b2;-unsaturated carboxylic acid

The object of the present invention is to provide a catalyst which can produce an &#x3b1;,&#x3b2;-unsaturated carboxylic acid through liquid-phase oxidation of an olefin or an &#x3b1;,&#x3b2;-unsaturated aldehyde in good reaction performance, a method for producing the catalyst, and a method for producing an &#x3b1;,&#x3b2;-unsaturated carboxylic acid by using the catalyst. The present invention resides in a catalyst for producing an &#x3b1;,&#x3b2;-unsaturated carboxylic acid, wherein a metal is supported on a carrier with a total pore volume of 0.40 to 1.50 cc/g as measured by nitrogen gas adsorption method, or wherein palladium with an average particle diameter in the range of 1 to 8 nm is supported on the carrier.

Catalyst for producing &#x3b1;,&#x3b2;-unsaturated carboxylic acid and method for preparation thereof, and method for producing &#x3b1;,&#x3b2;-unsaturated carboxylic acid

The object of the present invention is to provide a method for producing an &#x3b1;,&#x3b2;-unsaturated carboxylic acid in higher selectivity. The present invention resides in a method for producing an &#x3b1;,&#x3b2;-unsaturated carboxylic acid from an olefin or an &#x3b1;,&#x3b2;-unsaturated aldehyde in liquid phase by using a noble metal-containing catalyst and by causing a compound (A) having an acid dissociation exponent (pKa) of less than 4 to be present in the liquid phase.

Process for producing &#x3b1;,&#x3b2;-unsaturated carboxylic acid

The present invention provides: a palladium-containing catalyst which is used for highly selectively or highly productively producing an &#x3b1;,&#x3b2;-unsaturated aldehyde and an &#x3b1;,&#x3b2;-unsaturated carboxylic acid from an olefin or in that way producing an &#x3b1;,&#x3b2;-unsaturated carboxylic acid from an &#x3b1;,&#x3b2;-unsaturated aldehyde; a method for producing the catalyst; and a method for highly selectively or highly productively producing an &#x3b1;,&#x3b2;-unsaturated aldehyde and an &#x3b1;,&#x3b2;-unsaturated carboxylic acid from an olefin or in that way producing an &#x3b1;,&#x3b2;-unsaturated carboxylic acid from an &#x3b1;,&#x3b2;-unsaturated aldehyde. In particular, the present invention resides in a palladium-containing catalyst comprising 0.001 to 0.40 mole of tellurium metal to 1.0 mole of palladium metal. This catalyst can be preferably produced by a method having a step of reducing a compound containing palladium atom in its oxidized state and tellurium atom in its oxidized state by a reducing agent.

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Otake, Japan

Wataru Ninomiya