42results about How to "Volume content reduction" patented technology

A process flow for producing epichlorohydrin by epoxidation of propylene chloride provided by the present invention, including a reaction part, a separation part and a tail gas treatment part, is characterized in that phosphotungstic heteropolyacid quaternary ammonium salt is used as a catalyst and hydrogen peroxide is used as an oxidant , to prepare epichlorohydrin by epoxidation of propylene chloride under the condition of inert gas pressure. The materials produced by the reaction are separated by a three-phase separator to separate the oil phase, water phase and solid phase catalyst; the oil phase passes through the chloropropene tower to recover the chloropropene, and then passes through the epichlorohydrin tower to separate the product epichlorohydrin and by-product di Chloropropanol; the water phase is passed through the water refining tower to separate the by-product monochloropropanediol, and then discharged after membrane filtration; the solid-phase catalyst is recycled to the catalyst slurry tank after re-dosing. The technological process provided by the present invention is simple, less three wastes, high energy and low, and mild reaction conditions, and is suitable for the industrial production of epichlorohydrin.

The invention provides a catalytic cracking method and a catalytic cracking device capable of increasing propylene yield and improving properties of gasoline. The method comprises: (1) introducing a heavy oil raw material into the first reaction area of a riser reactor and mixing and contacting the heavy oil raw material with a regenerant to perform an reaction under a catalytic cracking condition; and (2) allowing light hydrocarbon raw materials to enter a bed reactor from the bottom and contact with another path of regenerant entering the bed reactor from the top in countercurrent for reaction, wherein after reaction, the catalyst is striped and delivered to the second reaction area of the riser reactor to mix, contact the catalyst with the oil gas and catalyst in a riser for reaction; and after reaction, the oil gas and catalyst are separated, the separated catalyst is stripped, regenerated and recycled, and the separated reaction oil gas is further separated to give products such as liquefied gas, gasoline and diesel oil. The method provided by the invention can improve low-carbon olefin yield of a catalytic cracking device, convert butene and benzene into propylene and ethylene, avoid influencing the adoption of other heavy raw materials by the device and obviously improve the properties of the gasoline.

The invention discloses a high thermal conductivity metal-based composite material with a hierarchical structure, and a preparation method of the high thermal conductivity metal-based composite material; the high thermal conductivity metal-based composite material and the preparation method are characterized in that a first stage composite material (composite material I) is formed by at least one nano-reinforced body and a metallic matrix, and a second stage composite material (composite material II) is formed by at least one micron-reinforced body and the composite material I, wherein the nano-reinforced body is selected from graphene, a carbon nano tube, carbon nano-fiber, a nano-graphite flake and nano-diamond, and at least has the size of 1-100nm along the one-dimensional direction; and the micron-reinforced body is selected from diamond, silicon carbide and silicon, and has the equivalent grain size of 30-600 mu m. The composite material has low and controllable coefficient of thermal expansion, high heat conductivity, thus being used as various heat management materials.