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

The invention discloses a method for modifying low-quality gasoline. The low-quality gasoline is cut into light and heavy fractions, wherein the light fraction accounts for 10-50% by weight, and the rest is heavy fractions. The distillate is mixed with hydrogen first, and then contacted with a pre-hydrogenation catalyst. The pre-hydrogenated oil is contacted with a hydrogenation catalyst for hydrotreating. The hydrotreated oil is then washed with alkali to remove the light fraction of mercaptans. Mixed to get the product gasoline. When the method is used to treat the catalytic cracking gasoline, the sulfur content of the gasoline can be reduced below 150 μg / g, the olefin content can be reduced by 15-30 percentage points, and the gasoline anti-knock index can be increased by 0.1-2.0 units.

A catalytic process for upgrading the poor gasoline by used of the stripping zone of settling unit in catalytic cracking apparatus includes cooling the regenerated catalyst to 300-550 deg.C, feeding the mixture of regenerated catalyst and the catalyst to be regenerated into said stripping zone, and counterflow contact of said mixture and the poor gasoline in the stripping zone for upgrading at 350-550 deg.C and 0.1-0.4 MPa for 0.5-3 seconds. It can decrease olefine content by 15-45% and S content by 10-30%, and increase RON by 0.5-2 unit.

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 provides a catalysis conversion method used for reducing the content of gasoline benzene; the gasoline raw material and gases containing small molecule alkene contact normal catalytic cracking catalyst, so as to carry out the alkylation reaction inside a fluidized bed reactor under the conditions of 250-550 DEG C of temperature, 2-100h<-1> of weight hourly space velocity, 0.1-1.0MPaof pressure, 1-30 of weight ratio of catalyst to gasoline raw material, 2-30 of gasoline raw material to small molecule alkene and 0.05-1.0 of weight ratio of water vapour to raw material; the materials after reaction are separated, and the reaction outcome is sent to a subsequent separation system for outcome separation so as to gain the object outcome; the catalyst after reaction is regenerated after being stripped and burned; the regenerated catalyst is returned to a reactor after being cooled for recycling. The method reduces the volume content of the benzene in the gasoline raw material by more than 50% and improves the octane and yield of the gasoline.

The invention discloses a catalytic cracking method and device, overcoming the defects of high gas and coke yields and low liquid yield which are caused by secondary cracking in the prior art. The method comprises the following steps: introducing a raw material oil into the lower part of a riser reactor so as to be contacted and reacted with a catalyst from a heat exchanger; carrying out crude separation on oil gas after reaction and a spent catalyst; further separating fine catalyst powder out of the reaction oil gas obtained by separation and then introducing the reaction oil gas without the fine catalyst powder into a fractionating column; carrying out steam stripping on the spent catalyst obtained by separation, and then introducing the spent catalyst subjected to steam stripping into a regenerator for regeneration; and introducing a part of regenerated high temperature reclaiming agent into the riser reactor from different heights of the riser reactor, introducing the other part of regenerated high temperature reclaiming agent into the heat exchanger, and the cooled reclaiming agent is recycled.

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.

The invention discloses a continuous deformation composite material profile and a preparation method thereof. The preparation method comprises the following steps in sequence: S1. impregnating continuous longitudinal fibers with resin to obtain a prepreg, and continuously welding or extruding the metal to obtain a tube blank; S2 .Continuously bring the prepreg into the tube blank to obtain the material to be deformed; S3. Synchronously drive the prepreg and tube blank of the material to be deformed, change the section of the tube blank by drawing or rolling process or / and deform the tube blank through the action of the mold Spatial form, to obtain continuous materials to be formed with the same or different spatial forms; S4. Heating the materials to be formed, to obtain continuous deformation composite material profiles with the same or different spatial forms, including core materials formed by cross-linking and curing of prepregs And the armor layer formed by deformation of the tube blank can continuously prepare the continuous deformation composite material profile, and the availability of the continuous deformation composite material profile can guarantee the value engineering design of the composite material that needs to integrate all aspects of performance requirements.

The invention provides a method of heavy raw material catalytic conversion and the device, comprising: the heavy hydrocarbon raw material passing through the first and second reaction area of the raiser reactor and contacting with catalyst for first reaction and second reaction, the reactants entering into the settler for the separation of catalyst and oil gas, steam stripping the separated catalyst through stripping section and introducing it to the reactivator for carbon burning reactivation, the reactivated catalyst returning to the raiser reactor after cooled or directly to the raiser reactor for reuse. After the heavy oil passing through the device said above, the volume content of olefin decreases by 10~40%, octane value increases 0.5~1 units, sulfur content in petrol decreases 10~30% by weight. After the poor petrol passing through the device said above, the volume content of olefin decreases by 10~60%, octane value increases 0.5~40 units, sulfur content in petrol decreases 10~50% by weight.