Toa Nenryo Kogyo Kabushiki Kaisha

Yagi Antenna Co., Ltd.

Katsumi Kaneko

Yoshiharu Okumura

Setsuo Kamiyama

Hiroshi Furukawa

Tadamori Sakakibara

Yukio Nagashima

Shozo Wada

Yoshihisa Matsushima

Nobukazu Okamoto

Eiichiro Nishikawa

Kouji Shiozawa

Masuo Shinya

Yohio Ishii

Kayako Ueda

Yuzo Sato

Yasushi Saito

Toshihiro Hosokawa

Yoshio Ishii

A radio-frequency amplifier circuit of simple construction having low power consumption and low heat generation and which amplifies an input signal while maintaining composite triple beat (CTB) distortion, type cross modulation distortion at a minimum, is provided. The radio-frequency amplifier comprises a transformer which transforms an input signal from an unbalanced state to a balanced state. The amplifier further comprises at least one distortion generation circuit including a first circuit having a nonlinear element and a first delay line coupled in series, and a second circuit having an attenuation element and a second delay line coupled in series. The first and second circuits are coupled in parallel. At least one distortion generation circuit is coupled to an input, an output, and/or an intermediate point of a radio-frequency amplification stage of the radio-frequency amplifier. The first and second delay lines are configured to create a delay time change in a signal input level of a signal input to the radio-frequency amplification stage which opposes a delay time change in the signal input level caused by a delay time difference between the input and output of the radio-frequency amplification stage. A transformer transforms the amplified input signal from the balanced state back to an unbalanced state before outputting the amplified signal from the amplifier circuit.

Radio frequency amplifier having improved CTB and cross modulation

The invention relates to a process of producing a carbonyl compound by dehydrogenating a linear aliphatic alcohol of 1 to 6 carbon atoms in the gas phase in the presence of a solid catalyst comprising a ruthenium catalyst supported on a carrier such as zinc oxide or magnesium oxide.

Process for producing carbonyl compounds

An improved process for producing an alcohol by hydrating an olefin wherein the improvement comprises hydrating an olefin in the presence of a hydrogen-type catalyst having a silica/alumina molar ratio of 20 to 500 and a solvent using either:

Process for hydration of olefins

An improved process for producing an alcohol by hydrating an olefin, wherein the improvement comprises hydrating an olefin in the presence of hydrogen-type mordenite or hydrogen-type zeolite Y as a catalyst each having a silica/alumina molar ratio of 20 to 500.

The invention relates to a method for the manufacture of ketones which comprises oxidizing an n-olefin in the presence of a catalyst containing palladium, copper, a halogen, and at least one of specific tertiary amines.

Method of manufacturing ketones

This invention relates to rhodium compounds having the general formula:

Process for producing rhodium compounds

Described is an olefin hydroformylation process for producing aldehydes utilizing a Pt Group IV-A organometallic catalyst mixture such as (PPh.sub.3).sub.2 PtPh-SnPh.sub.2 Cl/SnCl.sub.2. High yields of aldehydes are produced in high selectivity for the normal isomer, especially when using propylene as the olefin.

Process for producing aldehydes

Secondary alcohols are produced by the hydration of a n-olefin substantially free from an isoolefin in the presence as catalyst of an acidic cation exchange resin such as a sulfonated styrene-divinylbenzene copolymer and in the presence of an oxy acid or lactone thereof such as .gamma.-valerolactone. The process is especially useful for hydrating a n-butene feed or a feed consisting essentially of n-butenes and butane to produce secondary butyl alcohol.

Process for the production of secondary alcohols

A method of preparing a catalyst for the diacyloxylation of conjugated dienes such as butadiene by reaction with a carboxylic acid such as acetic acid and oxygen, which comprises separately and successively impregnating a carrier, for example carbon, with a solution of a Group VIII noble metal in a mixture of a mineral acid and an organic solvent, then with a solution of a Group IVA, VA or VIA element or compound thereof in an organic solvent.

Method of preparing a catalyst for synthesizing unsaturated esters

Tertiary alcohols are produced by the hydration of an isoolefin in the presence as catalyst of an acidic cation exchange resin such as a sulfonated styrene-divinylbenzene copolymer, and a polyhydric neo-type alcohol such as neopentyl glycol. The process is useful for separating isobutylene from a hydrocarbon mixture containing its isomers via preparation of the alcohol, separation from the unreacted hydrocarbons and dehydration of the tertiary butyl alcohol to isobutylene.

Process for the production of tertiary alcohols

This invention consists essentially in a method of removing oxygen from a gas containing an unsaturated hydrocarbon, which comprises contacting a gas containing an unsaturated hydrocarbon and oxygen with silver and/or gold, or a catalyst containing at least one of them, in the presence of hydrogen.

Method of removing oxygen from a gas containing an unsaturated

Novel rhodium compounds and process for producing the same

Tertiary alcohols are produced by the hydration of an isoolefin in the presence as catalyst of an acidic cation exchange resin such as a sulfonated styrene-divinylbenzene copolymer and in the presence of an oxy acid or lactone thereof such as .gamma.-valerolactone. The process is useful for separating isobutylene from a hydrocarbon mixture containing its isomers via preparation of the alcohol, separation from the unreacted hydrocarbons and dehydration of the tertiary butyl alcohol to isobutylene.

Isobutylene in a C.sub.4 hydrocarbon mixture with n-butenes and butanes is selectively hydrated to tertiary butyl alcohol by carrying out the reaction with water at a temperature not above 100.degree. C. in the presence of an acidic cation exchange resin and a sulfone.

Process for the production of tertiary butyl alcohol

In an oxo process wherein an olefin is caused to react with carbon monoxide and hydrogen, a rhodium catalyst is provided by carrying out the hydroformylation in the presence of a rhodium source and free mixed ligands comprising a tertiary organo phosphorus and tertiary organo arsenic in excess of the quantity required for coordination to the rhodium atom. For example, HRh(CO)(PPh.sub.3).sub.3 with excess AsPh.sub.3 /PPh.sub.3 may be used to give a high reaction rate and good selectivity to n-aldehyde.

Growing community of inventors

Ooi, Japan

Katsumi Kaneko