Fuji Oil Company Limited

Toho Chemical Industry Co., Ltd.

Sekiyushigen Kaihstsu Kabushiki Kaisha

Fuji Oil Company Limited and Petroleum Energy Center

Shinichi Okada

Toshio Tsutsui

Osamu Kubota

Masaki Fujii

Tadao Goto

Toshihito Nakamura

Takumi Sasaki

Naohide Tsuzuki

Masaharu Tashiro

Isao Fujikura

Yoshinobu Nakamura

Hitomi Hirano

Masao Inagaki

Yoshio Yasuda

Yoshitaka Satou

Yazaemon Morita

A process for measuring the mercury concentration within a hydrocarbon is provided that enables the mercury concentration to be measured simply and quickly, and with good reliability and good reproducibility. A process for measuring the mercury concentration within a hydrocarbon includes the steps of placing and weighing the hydrocarbon in a sample boatcontaining an adsorbent that contains a metal capable of forming an amalgam with mercury, and heating the hydrocarbon inside the sample boatin a combustion furnace, together with the adsorbent, and measuring the quantity of mercury within the thus generated gas.

Process for measuring mercury concentration within hydrocarbons

A rational technical process for producing dialkylnaphthalenes from petroleum-derived starting materials which exist in abundance is established. The process for producing dialkylnaphthalenes contains the steps (1), (2), (3), and (4): (1) 1,step which is for catalytically hydrodealkylating a stock oil containing a substantial amount of naphthalene and/or alkylnapthalenes, separating a product oil form a product gas, and separating and recovering a fraction composed mainly of naphthalene and/or methylnaphthalene from the product oil; (2) 2,step which is for catalytically alkylating or catalytically transalkylating the fraction, recovered in the 1,step, composed mainly of naphthalene and/or methylnaphthalene directly without pretreatment for purification, with an alkylating agent or transalkylating agent to prepare alkylnaphthalenes; (3) 3,step which is for separating and recovering dialkylnaphthalenes from the alkylnaphthalenes obtained in the 2,step; and (4) 4,step which is for returning at least a part of the residual fraction, after the separation and recovery of dialkylnaphthalenes in the 3,step, as at least a part of the stock oil in the 1,step and/or at least part of the alkylating agent or transalkylating agent in the 2,step to the corresponding step.

Process for producing dialklylnaphthalenes

The present invention provides a method for producing .beta.-methylnaphthalene from an inexpensive and easily available feed oil. According to the invention, highly pure .beta.-methylnaphthalene adequate for industrial use can be mass-produced at reduced costs. The method comprises catalytic hydrodealkylation of a feed oil containing an alkyl naphthalene having at least two methyl groups in the presence of a catalyst having at least one metal species of selected from the group consisting of vanadium (V), chromium (Cr), nickel (Ni), rhodium (Rh), platinum (Pt), iridium (Ir), and compounds of these metals as an active component and a carrier therefor containing at least one of alumina and silica as its primary component, with a hydrogen partial pressure of 1 to 50 kgf/cm.sup.2, at a temperature of 450.degree. C. to 650.degree. C., and for a contact time of 3 to 35 seconds. The method of the invention is excellent in that it affords .beta.-methylnaphthalene of a chemical grade with a high yield.

Method for producing .beta.-methylnaphthalene

A coal - water slurry at high concentration which has a low viscosity and favorable flowing property is prepared by using a surface active substance prepared by sulfonating and oxidizing at least one of the starting materials selected from distilled petroleum oils, petroleum pitches, asphalts, distilled coal oils, coal pitches or coals, applying condensation as required and then neutralizing the thus obtained product with alkalis.

Process for producing coal-water slurry at high concentration

Growing community of inventors

Chiba, Japan

Shinichi Okada