Mitsubishi Jukogyo Kabushiki Kaisha

Naoyuki Takahashi

Naohiko Ukawa

Naoharu Shinoda

Masumi Atsukawa

Toshiro Okamoto

Hiroshi Makihara

Nobuaki Murakami

Michio Oshima

Yoshihiko Kamimura

A thermal cracking method for producing olefins from hydrocarbons which comprises the steps of mixing said hydrocarbons with a mixed gas of methane and hydrogen in a methane/hydrogen mol ratio of 0.2 or more; prior to reaction carrying out a thermal cracking reaction under conditions such that the total concentration of methane and hydrogen is at least 40 mol % or more at the outlet of a reactor, the partial pressure of said hydrogen is 3 bars or more, the temperature at the outlet of the reactor is from 800.degree. to 1200.degree. C., and the residence time in the reactor is from 5 to 300 milliseconds; and quenching the reaction product discharged through the outlet of the reactor.

Thermal cracking method for producing olefins from hydrocarbons

Nitrogen oxides and sulfur oxides are removed from exhaust gases in a two step process including a slurry removal of the sulfur oxides followed by washing the gases with an aqueous solution of an alkali metal iodide and/or an alkaline earth metal iodide.

Process for the removal of SO.sub.x and NO.sub.x from waste gases using

A process for removing nitrogen oxide contained in a waste gas is disclosed which includes oxidizing the nitrogen oxide to nitrogen dioxide by mixing the gas with nitric acid vapor in the presence of porous adsorbing agent such as silica gel, colloid earth, alumina, molecular sieves or the like and removing the nitrogen dioxide by absorption with an alkali aqueous solution.

Process for removing nitrogen oxide from a waste gas

Growing community of inventors

Saiki, Japan

Naoyuki Takahashi