Nippon Shokubai Kagaku Kogyo Co., Ltd.

Nippon Shokubai Co., Ltd.

Other

Ngk Insulators, Inc.

Kunio Sano

Akira Inoue

Kiichiro Mitsui

Sadao Terui

Kazuyoshi Nishikawa

Yusuke Shiota

Tohru Ishii

Toshihide Kanzaki

Tooru Ishii

Keniti Shishida

Mitsuaki Ikeda

Motonobu Kobayashi

Takahisa Sato

Yoshiyuki Yokota

Keiji Hirano

Hideki Sogabe

Takehiko Suzuki

Masakatsu Hiraoka

Junji Okamura

Yoshinori Imoto

Katsunosuke Hara

Tsutomu Taira

Keizo Maruyama

Yoku Nanba

Hiroaki Hayashi

Yasushi Hattori

Kazunori Yoshino

Kazumi Okuhara

Seiichiro Imamura

The present invention provides a method of treating waste water including nitrogen-containing organic compounds to convert these compounds into harmless gases without performing a post-treatment. The method comprises spraying waste water in a heated space to gasify the waste water into waste gas, and oxidizing the waste gas by contacting it with a catalyst to convert the nitrogen-containing organic compounds into harmless gases. An apparatus for treating waste water using the method is also disclosed.

Method of treating waste water and apparatus for treating waste water using the method

Catalyst for purifying fumigation exhaust gases and a method of

The present invention provides a catalyst used in wastewater treatment process wherein not only an organic compound not containing nitrogen, sulfur or halogen is decomposed, but also a nitrogen-containing compound, a sulfur-containing compound and an organic halogeno compound are effectively decomposed, thereby wastewater are treated with excellent efficiency for a long period of time. The invention also provides a production process for the catalyst and said wastewater treatment process. The first catalyst comprises: an oxide of iron as an A component; and at least one kind of element as a B component selected from a group consisting of cobalt, nickel, cerium, silver, gold, platinum, palladium, rhodium, ruthenium and iridium. The second catalyst comprises: an oxide as an A component containing iron and at least one kind of element selected from a group consisting of titanium, silicon and zirconium; and at least one kind of element as a B component selected from a group consisting of cobalt, nickel, cerium, silver, gold, platinum, palladium, rhodium, ruthenium and iridium.

Catalyst for treating wastewater, process for producing it, and process

A gas containing malodorous components is deodorized by passing the gas over a MnO.sub.2 based catalyst while the catalyst is heated by directly applying an electric current thereto, thereby catalytically oxidizing the malodorous components in the gas and effecting their removal.

Method of deodorizing a gas containing maloderous components

Catalyst for treating wastewater

A catalyst composition including component A and component B, the component A being a carrier, preferably having a honeycomb structure, and being a single-component oxide or a multi-component composite oxide of at least one metal of titanium, silicon and zirconium, and the component B being a catalyst component deposited on the carrier of component A and being at least one member selected from the group of noble metals and other specifically limited metals and their oxides, is very effective for decomposing and removing poisonous organic chlorine compounds, such as dioxin and the like, or poisonous organic chlorine compound-forming substances contained in an exhaust gas exhausted from an incinerator of an incineration plant provided with the incinerator and a dust collector. In addition, and the generation of the poisonous organic chlorine compound from the incineration plant can be prevented.

Method of treating exhaust gas

This invention relates to a catalyst for use in water treatment and to a method for the water treatment by the use of the catalyst. The catalyst comprises a first catalyst component e.g. the oxide of titanium, silicon, aluminum and zirconium, and a second catalyst component e.g. manganese, iron, cobalt, nickel, cerium, tungsten, copper, silver, gold, platinum, palladium, rhodium, ruthenium, and iridium or a sparingly water-soluble compound of the metal.

Catalyst for water treatment

A method for the purification of waste water by the use of a heat-exchanger type reaction vessel composed of a plurality of inner tubes and a shell defining jointly with the outer peripheries of the inner tubes a passage for the flow of a heat transfer medium, which method comprises passing said waste water through said inner tubes and, at the same time, feeding a molecular oxygen-containing gas to the flow of said waste water thereby establishing contact between said waste water and said feed gas and consequently effecting wet oxidation of the impurities present in said waste water.

Method for purification of waste water

A catalyst for the purification of a gas containing ozone or a component of offensive odor is composed of (A) a composite oxide comprising (a) titanium and (b) at least one element selected from the group consisting of Si, Zr, and P and (B) at least one element selected from the group consisting of Mn, Fe, Co, Ni, Ag, Pt, Pd, and Rh.

Method for purification of gas

A method for the treatment of waste water, which comprises wet oxidizing said waste water with a molecular oxygen-containing gas of an amount 1.0 to 1.5 times the amount thereof theoretically necessary for decomposing at least one substance selected from the group consisting of organic substances and inorganic substances present in said waste water to nitrogen, carbon dioxide, and water at a temperature not exceeding 370.degree. C. under a pressure enough for said waste water to retain a liquid phase in the presence of a solid catalyst comprising of a first catalytic component formed of titanium dioxide, a second catalytic component formed of the oxide of an element of lanthanide series, and a third catalytic component containing at least one metal selected from the group consisting of manganese, iron, cobalt, nickel, tungsten, copper, silver, gold, platinum, palladium, rhodium, ruthenium, and iridium or a water-insoluble or sparingly water-soluble compound of said metal.

Method for treatment of waste water

A method for purifying an exhaust gas containing catalyst poison(s) by subjecting the gas to a catalytic treatment which comprises previously passing the gas through a layer packed with a highly activated alumina to remove the catalyst poison(s); and an apparatus for purifying exhaust gas containing catalyst poison(s) by subjecting the gas to a catalytic treatment, wherein a layer packed with a highly activated alumina for removal of the catalyst poison(s) and a layer packed with an oxidation catalyst for removal of harmful substances in the gas are separately arranged.

Method for purifying exhaust gas and apparatus

A method of disposing of organic chlorine compounds by burning them in contact with a catalyst of composite oxides selected from titanium-silicon composite oxides, titanium-zirconium composite oxides, and titanium-silicon-zirconium composite oxides, whereby the resulting hydrogen chloride (HCl) is adsorbed by a basic absorbent.

Method of disposal of organic chlorine compounds by combustion

A process for producing aromatic or heterocyclic nitriles, which comprises reacting an alkyl-substituted aromatic hydrocarbon or an alkyl-substituted heterocyclic compound with ammonia and oxygen in the presence of a catalyst composition comprising (a) at least one composite oxide selected from the group consisting of a binary composite oxide comprising titanium and silicon, a binary composite oxide comprising titanium and zirconium and a ternary composite oxide comprising titanium, silicon and zirconium, and (b) an oxide of at least one metal selected from the group consisting of vanadium, molybdenum, tungsten, chromium, antimony, bismuth, phosphorus, niobium, iron, nickel, cobalt, manganese and copper.

Process for producing aromatic nitriles or heterocyclic nitriles

Efficient treatment of waste water is accomplished by subjecting the waste water to wet oxidation under continued supply of an oxygen containing gas at a temperature of not more than 370.degree. C. under a pressure enough for the waste water to retain the liquid phase thereof intact, in the presence of a catalyst containing a composite oxide of at least two metals selected from the group consisting of Ti, Si, and Zr and at least one metal selected from the group consisting of Mn, Fe, Co, Ni, W, Cu, Ce, Ag, Pt, Pd, Rh, Ru, and Ir or a compound of the one metal mentioned above.

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Ako, Japan

Kunio Sano