Mitsubishi Rayon Company, Limited

Mitsubishi Chemical Corporation

Hokkaido University

Tokushima University

Toshiya Yasukawa

Ken Ooyachi

Wataru Ninomiya

Shuji Akihara

Yoshiyuki Himeno

Akio Takeda

Tatsuya Suzuki

Kenichi Miyaki

Toshiki Matsui

Wataru Ueda

Toru Murayama

Shigeru Sugiyama

Yuuki Katou

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

Provided is a method for producing isobutylene with a high selectivity by a dehydration reaction of isobutanol. There are provided a method for producing isobutylene by dehydration of isobutanol, in which the dehydration of isobutanol is performed in a state where at least one of an organic acid and an organic acid ester is present in a reaction system, and methods for producing methacrylic acid and methyl methacrylate from the obtained isobutylene.

Method for producing isobutylene, method for producing methacrylic acid, and method for producing methyl methacrylate

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

A method for efficiently producing t-butanol as a raw material of a methacrylic resin from isobutanol is described, including a step (1) of dehydrating isobutanol to obtain butenes, and a step (2) of hydrating the butenes to obtain t-butanol. A method for producing methacrolein and methacrylic acid is also described, which further includes a step (3) of dehydrating and oxidizing the obtained t-butanol to obtain methacrolein and methacrylic acid. An apparatus for performing the steps (1) to (3) is also described.

[object Object]

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

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

Disclosed is a palladium-containing catalyst for producing an &#x3b1;, &#x3b2;-unsaturated carboxylic acid from an olefin or an &#x3b1;, &#x3b2;-unsaturated aldehyde in high productivity. Also disclosed are a method for producing such a catalyst, and a method for producing an &#x3b1;, &#x3b2;-unsaturated carboxylic acid in high productivity. Specifically, a palladium-containing catalyst is produced by a method containing a step in which palladium in an oxidation state is reduced by a compound (A) which is represented by the following formula (1). 

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Otake, Japan

Toshiya Yasukawa