Sumitomo Chemical Company, Limited

Jun Yamamoto

Junpei Tsuji

Yasuyoshi Ueda

Junichi Sekihachi

Yosuke Yamamoto

Takashi Omura

Hideo Hattori

Yutaka Kayane

Avelino Corma Canos

Masaaki Katao

Kazuhiro Machiguchi

Shigeru Goto

Kiyoyasu Hashimoto

Shinei Ikeou

A method for producing propylene oxide in which the concentration of an organic peroxide in a reaction solution after an epoxidation step is from 20 to 5,000 ppm by weight based on the amount excluding propylene in the reaction solution, the method comprising an epoxidation step of reacting an organic peroxide with propylene in the presence of a catalyst to obtain propylene oxide and an alcohol, a propylene recovery step of recovering the unreacted propylene in the epoxidation step and recycling the resulting propylene as a raw material of the epoxidation step, and a propylene oxide purification step of distilling the propylene oxide obtained in the epoxidation step to obtain purified propylene oxide.

Method for producing propylene oxide

Provided is a method for storing a high active titanium-containing silicon oxide catalyst, characterized in that the catalyst is stored at a relative humidity of 60% or less. The method can be used for a reaction, for example, wherein an oxirane compound is prepared from hydroperoxide and olefinic compound, even after the catalyst has been stored for a long period of time. The titanium-containing silicon oxide catalyst can be suitably employed as a catalyst satisfying the following requirements: (1) an average pore diameter is 10 &#x212b; or more, (2) the pores accounting for 90% or more of the total pore volume have a pore diameter of 50 to 200 &#x212b;, and (3) a specific pore volume is 0.2 cm cm/g or more.

Method for storing titanium-containing silicon oxide catalyst

A process for producing a titanium-containing silicon oxide catalyst, which comprises the following steps A and B; a catalyst obtainable by the process; and a process for producing an olefin oxide using the catalyst. Step(A) in which a silica source part or all of which is a silicon compound having a silicon atom having a hydrocarbon group directly bonded thereto is mixed by stirring with a titanium source and a template solution to obtain a solid containing the catalyst component and template, the rate of water in the solvent in the template solution being 50% by weight or lower or a step in which a silica source which comprises a combination of an organic silica source comprising a silicon compound having a silicon atom having a hydrocarbon group directly bonded thereto with a silicon compound having no carbon-silicon bond is mixed by stirring with a titanium source and the template solution to obtain a solid containing the catalyst component and the template, the addition of the silica source to the template solution being conducted so as to satisfy the relationship: (amount of the organic silica source added in the first half)&#x3e;(amount of the organic silica source added in the latter half). Step B: a step in which the template is removed from the solid obtained in the step A.

Process for producing titanium-containing silicon oxide catalyst, the catalyst, and process for producing olefin compound with the catalyst

A process for the production of cumene, which comprises producing cumene from cumyl alcohol and hydrogen with a dehydration catalyst and a hydrogenation catalyst, wherein the dehydration catalyst and hydrogenation catalyst are alternately packed so as to form n layers (n is an integer of 3 or more) or are packed as a mixture thereof in a reactor.

Process for producing cumene

A process for producing a specific titanium-containing silicon oxide catalyst having a specific average pore diameter, a specific a pore diameter distribution and a specific pore volume per unit weight, which comprises the following first to second steps:

Process for producing titanium-containing silicon oxide catalyst

A process for producing a titanium-containing silicon oxide catalyst satisfying the following conditions, which comprises the following steps:

Process for production of titanium-containing silicon oxide catalysts

A titanium-containing silicon oxide molded catalyst satisfying all of the following conditions (1) to (4):

Molded catalyst, process for producing molded catalyst, and process for producing oxirane compound

Process for producing propylene oxide

Process using a titanium-containing silicon oxide catalyst

Titanium-containing silicon oxide catalyst

A compound, 3-phenyl-7-&lsqb;4-(tetrahydrofurfuryloxy)phenyl&rsqb;-1,5-dioxa-s-indacene-2,6-dione, which has a structure of crystals exhibiting the strongest peak at an angle of diffraction, 2&thgr;, of 4.7&deg;, among peaks appearing within the range of not smaller than 3&deg; of 2&thgr;, in an X-ray diffraction using a Cu-K&agr;-ray. The compound gives dyed or printed products having deep and brilliant tint of colors with excellent fastnesses, when applied to hydrophobic fiber materials, particularly, polyester fiber materials.

3-phenyl-7-&lsqb;4-(tetrahydrofurfuryloxy)phenyl&rsqb;-1,5-dioxa-s-indacene-2,6-dione

A process for producing propylene oxide by reacting propylene with ethylbenzene hydroperoxide in the presence of a titanium-containing silicon oxide catalyst satisfying all of the following conditions (1) to (4):

A heterocyclic compound of the formula, ##STR1## wherein A and B are each hydrogen, halogen, alkyl or alkoxy, R.sup.1 is alkylene having upto 6 carbon atoms, X is direct linkage or divalent group such as --O--, --S--and the like, T and U are each hydrogen or alkyl, l is 0 or 1 to 3, Q is 5-, 6- or 7- membered saturated or unsaturated heterocyclic residue, and Y is hydrogen, halogen, alkyl, alkoxy or ##STR2## and B are taken together with each other to form methylene-dioxy, which is useful for dyeing or printing hydrophobic fiber materials with superior dyeability to give a dyed or printed product of a red color excellent in fastness properties, particularly those such as washing fastness.

Heterocyclic compounds for making red disperse dyes

A benzodifuranone compounds of the formula, ##STR1## wherein R.sup.1 and R.sup.2 are each independently a naphthyl group or an unsubstituted or substituted phenyl group, which is useful for dyeing or printing hydrophobic fiber materials, is prepared in high purity and high yield by allowing benzofuran compounds of the formula, ##STR2## wherein R.sup.1 is as defined above, to react with acetonitrile compounds of the formula, ##STR3## wherein R.sup.2 is as defined above, and then carrying out an oxidation reaction to give the benzodifuranone compound.

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Sodegaura, Japan

Jun Yamamoto