Abstract: The continuous process for removing mercury comprises a step of continuously feeding a mercury-containing liquid hydrocarbon to an ionization zone where the elementary mercury is ionized; and a step of continuously feeding the liquid hydrocarbon containing the ionized mercury to a sulfur compound-treatment zone where the ionized mercury is converted to a solid mercury compound. The semi-continuous process for removing mercury comprises a step of continuously feeding a mercury-containing liquid hydrocarbon to an ionization column where the elementary mercury is ionized; and a step of feeding the liquid hydrocarbon containing the ionized mercury to a sulfur compound-treatment tank where the ionized mercury is converted to a solid mercury compound in batch manner. With the above processes, the mercury is removed from the liquid hydrocarbon with ease in a continuous or semi-continuous manner at around ordinary temperature under around ordinary pressure.

Abstract: A process for removing mercury of the present invention is characterized in that an ionic mercury-containing liquid hydrocarbon placed in a container equipped with a circulating means is effectively contacted with a sulfur compound represented by the general formula (I):

Abstract: The continuous process for removing mercury comprises a step of continuously feeding a mercury-containing liquid hydrocarbon to an ionization zone where the elementary mercury is ionized; and a step of continuously feeding the liquid hydrocarbon containing the ionized mercury to a sulfur compound-treatment zone where the ionized mercury is converted to a solid mercury compound. The semi-continuous process for removing mercury comprises a step of continuously feeding a mercury-containing liquid hydrocarbon to an ionization column where the elementary mercury is ionized; and a step of feeding the liquid hydrocarbon containing the ionized mercury to a sulfur compound-treatment tank where the ionized mercury is converted to a solid mercury compound in batch manner. With the above processes, the mercury is removed from the liquid hydrocarbon with ease in a continuous or semi-continuous manner at around ordinary temperature under around ordinary pressure.

Abstract: In a method of efficiently removing mercury from a liquid hydrocarbon, the liquid hydrocarbon is contacted with water contacted in advance with a crude oil and a sludge contacted in advance with a crude oil. Alternatively, the liquid hydrocarbon is contacted with a substance having ability of ionizing elemental mercury and a sulfur compound having the formula: MM′S, wherein M and M′ are identical or different and are each hydrogen, alkali metal or ammonium group. When the liquid hydrocarbon to be treated contains no dissolved oxygen or contains dissolved oxygen in an amount in equilibrium with a gas containing 8% by volume of oxygen, the increase in the mercury concentration of a liquid hydrocarbon after the removing treatment is effectively prevented.

Abstract: In the Kolbe-Schmitt process for the preparation of hydroxybenzoic acid by the reaction of potassium phenolate with carbon dioxide gas followed by precipitation of the hydroxybenzoic acid in the mixture acidified with hydrochloric acid, the potassium value in the acidified mother liquor is conventionally recovered by electrolysis after removing the organic impurities by chlorination with chlorine. The disadvantages in the use of chlorine can be dissolved by replacing the chlorine treatment with (a) dehydration of the acidified mother liquor followed by calcination of the dehydrated product, (b) salting-out by blowing hydrogen chloride gas into the acidified mother liquor, or (c) reverse osmosis treatment prior to the electrolysis to convert potassium chloride into potassium hydroxide, for example, by using an ion exchange membrane.

Abstract: Disclosed are a ceramics binder comprising an organic binding agent and adamantane and/or trimethylenenorbornane as a binding auxiliary, and a method for producing a ceramics article comprising mixing a ceramics raw material powder with a ceramics binder comprising an organic binding agent and adamantane and/or trimethylenenorbornane as a binding auxiliary, molding the resulting mixture by an injection molding method or an extrusion molding method to obtain a molded article, and sintering the molded article. When the ceramics binder is used in a dough for injection molding, the time required for eliminating the ceramics binder can be shortened and the content of the ceramics binder which remains in the molded articles after eliminating treatment can be reduced to a negligibly low level.