5 results about "Halomethane" patented technology

The objective of the present invention is to provide a method for producing a carbonyl halide safely and efficiently. The method for producing a carbonyl halide according to the present invention is characterized in comprising the step of irradiating a light to a halomethane having 1 or more halogeno groups selected from the group consisting of chloro, bromo and iodo in the presence of oxygen and ozone.

Provided is a method for efficiently producing a carbonyl halide from a halogenated methane. The method for producing a carbonyl halide according to the present invention is characterized by comprising the steps of: a step of preparing a mixed gas containing a halogenated methane and oxygen, the halogenated methane having one or more halogen groups selected from the group consisting of chlorine, bromine, and iodine; and a step of flowing the mixed gas and irradiating the flowing mixed gas with high-energy light.

The present disclosure relates to the field of refrigeration and heating. Disclosed are a heat transfer composition and the use thereof. The heat transfer composition comprises halogenated methane I, fluoropropene II and fluoroethane III, the content of the halogenated methane I being x wt% by mass, the content of the fluoropropene II being y wt% by mass and the content of the fluoroethane III being z wt% by mass. In the ternary-phase diagram thereof, the coordinates (x, y, z) are located on point A (75.1, 23.9, 1.0), point B (75.1, 5.0, 19.9) and point C (94.0, 5.0, 1.0) themselves, straight line segment AB, straight line segment BC and straight line segment CA, and a triangular area defined by said straight line segments. The heat transfer composition provided by the present disclosure has a low GWP value, is environmentally friendly, exhibits good heat exchange effect, involves low cost in use and is applicable to various scenarios, and can achieve a direct replacement on the heat transfer composition R410A or R404A without modifying or changing original heat exchange devices.

This invention discloses a method for the electrocatalytic hydrogenation dehalogenation of haloacetic acids or halomethanes in water. A conductive material surface-modified with ruthenium or platinum is used as the catalytic cathode, and water is used as the hydrogen source to electrochemically hydrogenate and dehalogenate haloacetic acids or halomethanes in water into acetic acid or methane. The precious metals in the catalytic cathode of this invention are cheaper; the unit price of ruthenium is much lower than that of palladium and rhodium. Compared with palladium-modified catalytic cathodes, the dechlorination selectivity is higher, with an 11.7% increase in the selectivity for the hydrogenation and dechlorination of trichloroacetic acid in water to acetic acid.

This invention relates to the field of refrigeration and heating, and discloses a heat transfer composition and its application. The heat transfer composition comprises: halomethane I, fluoropropylene II, and fluoroethane III, wherein the content of halomethane I is x wt%, the content of fluoropropylene II is y wt%, and the content of fluoroethane III is z wt%. In the three-phase composition diagram, the coordinates (x, y, z) are located on the triangular region enclosed by points A (75.1, 23.9, 1.0), B (75.1, 5.0, 19.9), and C (94.0, 5.0, 1.0), line segments AB, BC, and CA. The heat transfer composition provided by this invention has a low GWP value, is environmentally friendly, has good heat exchange performance, low application cost, and is applicable to a wide range of scenarios. It can directly replace heat transfer compositions R410A or R404A without requiring modification or replacement of existing heat exchange devices.