Abstract:
An economical catalyst for dimethyl carbonate synthesis is disclosed which has a high conversion rate under supercritical conditions of CO2 and can be handled easily. The catalyst for dimethyl carbonate synthesis is obtained by loading SO42- or PO43- on a carrier composed of a compound having a solid acid site, and used for producing dimethyl carbonate from acetone dimethyl acetal and CO2 in supercritical state. The compound having a solid acid site is preferably one or more of ZrO2, Al2O3 and TiO2.
Abstract:
A method for converting a chlorine-containing waste plastic comprising heating the mixture of a waste plastic containing a chlorine-containing plastic with an aqueous solution of an alkali metal carbonate or a hydroxide or carbonate of an alkaline earth metal or an aqueous solution containing a plurality of these compounds, which is adjusted to have a concentration of dissolved oxygen as low as 0.5 mg/liter or less, to liberate the chlorine in the waste plastic and decompose the waste plastic in the process of transferring to a supercritical condition or under a supercritical condition, or comprising heating an aqueous solution of an alkali metal carbonate or a hydroxide or carbonate of an alkaline earth metal or an aqueous solution containing a plurality of these compounds, and admixing a molten waste plastic containing a chlorine-containing plastic into this aqueous solution in the process of transferring to a supercritical condition or under a supercritical condition, wherein the concentration of dissolved oxygen in the aqueous solution is adjusted to 0.5 mg/liter or less before or upon admixing of the waste plastic, to thereby liberate the chlorine in the waste plastic and decompose the waste plastic.
Abstract:
A method of converting a plastic waste into oil by decomposing the plastic waste by a reaction using water in a supercritical or near supercritical region as a reaction medium. In this method, the reaction is conducted by using a tubular continuous reactor. The present invention further provides an apparatus therefor. Moreover, the present invention provides a method of converting a plastic waste into oil by conducting the reaction after hydrogen chloride is removed by performing the pyrolysis of the plastic waste in the case that the plastic waste contain chlorine. The present invention further provides an apparatus for performing this method.
Abstract:
A biomass gasifying furnace equipped with a biomass feeding means which feeds a biomass to the inside of the body of the furnace and a feeding means for an oxidizing agent for burning which is disposed above the biomass feeding means and feeds an oxidizing agent for burning comprising oxygen or a mixture of oxygen and steam to the inside of the body of the furnace; and a methanol synthesizing system which gasifies a biomass to produce a gas and synthesizes methanol using the gas.
Abstract:
A method and a device for manufacturing dimethyl carbonate, characterized in that carbon dioxide is collected from exhaust gases from a steam reformer (10) and a boiler, a part of the carbon dioxide is used as a material for the steam reformer (10) to synthesize methanol, and the remaining carbon dioxide is allowed to react with a part of the generated methanol to synthesize dimethyl carbonate. By the method and the device, CO2 which was discharged before can be returned to the steam reformer to effectively use it for the production of DMC. Also the device for the production of methanol and DMC can be facilitated.