Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Hiro

122results about How to "Reduce carbon deposition rate" patented technology

Catalytic cracking coupling process for preparing low-carbon olefin and C<5+> hydrocarbon by using organic oxygen-containing compound

The invention discloses a catalytic cracking coupling process for preparing low-carbon olefin and C<5+> hydrocarbon by using an organic oxygen-containing compound. The catalytic cracking coupling process comprises the following steps: converting the organic oxygen-containing compound into the low-carbon olefin under the effect of a catalyst in a reactor for preparing the low-carbon olefin by the organic oxygen-containing compound; in a catalyst regenerator, heating for oxidizing and decarbonizing a waste catalyst which enters the catalyst regenerator through a waste catalyst conveying pipeline from the reactor so as to regenerate a regenerated catalyst; conveying the regenerated catalyst back into the reactor by a regenerated catalyst conveying pipeline; introducing the C<5+> hydrocarbon into the regenerated catalyst conveying pipeline; under the catalytic effect of the catalyst, catalytically cracking the C<5+> hydrocarbon into the low-carbon olefin; and conveying the generated low-carbon olefin and the regenerated catalyst into the reactor by the regenerated catalyst conveying pipeline. According to the process disclosed by the invention, the high temperature of the regenerated catalyst is effectively utilized and the C<5+> hydrocarbon is cracked into the low-carbon olefin to form active hydrocarbon tank species, so as to shorten a reaction induction period, reduce the selectivity of converting the organic oxygen-containing compound into active carbon tank species and improve the yield of the low-carbon olefin.
Owner:CHNA ENERGY INVESTMENT CORP LTD +1

Synthesis method of low-silicon nano SAPO-34 molecular sieve

The invention relates to a synthesis method of a low-silicon nano SAPO-34 molecular sieve, which comprises the following steps: sequentially mixing a silicon source, an aluminum source, a template agent R, deionized water and a phosphorus source to obtain a gel mixture; placing the gel mixture in a stainless steel high-pressure reaction kettle of which the liner is made of polytetrafluoroethylene, sealing, putting into a drying oven, and performing primary traditional hydrothermal crystallization; adding a dispersant agent S into the primary traditional hydrothermal crystallization solution, stirring for 0.5-4 hours, transferring into the reaction kettle of which the liner is made of polytetrafluoroethylene, sealing, putting into a microwave reactor, and performing secondary microwave hydrothermal crystallization; and washing, drying, and roasting to obtain the nano SAPO-34 molecular sieve. Compared with the prior art, the invention greatly lowers the crystallization temperature and shortens the time of the whole synthesis process. The nano molecular sieve can be widely used for conversion, separation and absorption of hydrocarbons, and especially has the advantages of high conversion rate, high low-carbon alkene selectivity, low carbon deposition rate, long reaction life and the like in the process of preparing alkene from methanol.
Owner:SHANGHAI LVQIANG NEW MATERIALS CO LTD +1

Method for preparing dimethyl ether from methanol

This invention relates to a preparation method for dimethyl ether by dehydrating methanol under liquid phase or gas-liquid mixing state in a catalytic distillation tower loaded with a solid acid catalyst in reaction section, wherein the methanol has a content of 5~99.99 wt.%. Catalytic distillation tower operating conditions include pressure of 0.6~5.0 MPa, column top temperature of 30~124DEG C, reaction section central temperature of 120~220DEG C, column reactor temperature of 160~270DEG C, the reflux ratio at 3~50, and feed volume space velocity of 0.1-10 ml methanol / ml catalyst, Or the reactions are carried out in one fixed bed rector or 2~4 fixed bed reactors in series with reaction conditions of temperature 120~220DEG C, pressure 0.6~8.0 MPa, and feed volume space velocity 0.1-10 ml methanol / ml catalyst.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI

Jet fuel production method

The present invention discloses a jet fuel production method, which comprises that (1) hydrogen gas, raw material oil and a hydrorefining catalyst are subjected to a contact reaction; (3) the effluent of the hydrorefining catalyst and a hydrocracking catalyst are directly subjected to a contact reaction, or after the gas phase stream is separated, a contact reaction is performed with a hydrocracking catalyst; (4) the effluent of the hydrocracking catalyst is separated to obtain a jet fuel and diesel oil; and (5) at least partial diesel oil and the raw material oil are mixed, or at least partial diesel oil and the feeding liquid of the hydrocracking catalyst are mixed, wherein the aromatic hydrocarbon content of the raw material oil is more than or equal to 40 wt%, the contact reaction condition of the step (1) makes the bicyclic aromatic hydrocarbon saturation rate in the raw material oil be 70-90%, and the contact reaction conditions of the step (3) makes the monocyclic aromatic hydrocarbon saturation rate in the feeding liquid of the step (3) be 75-95%. According to the present invention, the catalytic cracking diesel oil can be used as the raw material so as to achieve the high yield production of the high density jet fuel meeting the GJB1603 6# jet fuel standard.
Owner:CHINA PETROLEUM & CHEM CORP +1

Aromatic olefin-reducing catalyst and use thereof

The present invention relates to an aromatic olefin-reducing catalyst mainly solving the problems of short carclazyte life, frequent replacement, large labor intensity, and serious environmental pollution when the carclazyte is used for removing trace olefins in an aromatic material in current industry. The aromatic olefin-reducing catalyst is used, the average pore diameter of the aromatic olefin-reducing catalyst is 5-30nm, the aromatic olefin-reducing catalyst comprises the following components by weight: 0 to 15% of lanthanide elements or a mixture thereof; 0 to 20% of oxides of one or more elements selected from Ca, Zn , Mg and Ti; and 30 to 90% of a molecular sieve, the molecular sieve is at least one selected from mordenite, Y zeolite, ZSM-5 molecular sieve, MCM-22 molecular sieve, MCM-56 molecular sieve, and beta-molecular sieve; and a carrier is one substance selected from alumina and silica or a mixture thereof, and by the technical scheme, the problem is preferably solved, and the method can be used for aromatic olefin-reducing industrial production.
Owner:CHINA PETROLEUM & CHEM CORP +1

Preparation method of polymetallic reforming catalyst

A preparation method of a polymetallic reforming catalyst comprises the following steps: allowing platinum, tin and rare earth metal uniformly-supported small catalyst spheres to be in solid contact with rare earth metal salt powder, and roasting the obtained mixture in air or water-containing air to obtain a reforming catalyst with rare earth metals enriched in the shell area of the catalyst, wherein the average content of rare earth metals in the shell area is 2-5 times the average content of rare earth metals in a center area, the catalyst shell area is an area from the outer edge of the small catalyst sphere to the center and with the thickness of 150[mu]m, the solid phase supported catalyst comprises an alumina carrier, platinum accounting for 0.1-2.0% of the mass of the alumina carrier, tin accounting for 0.1-2.0% of the mass of the alumina carrier, rare earth metals accounting for 0.05-1.0% of the mass of the alumina carrier, and chlorine accounting for 0.5-5.0% of the mass of the alumina carrier. The catalyst prepared through the method has good activity and stability and low carbon depositing rate in reforming reactions.
Owner:CHINA PETROLEUM & CHEM CORP +1

Light hydrocarbon isomerization method

The invention relates to a light hydrocarbon isomerization method comprising the following steps: light hydrocarbon materials are firstly separated by a de-isopentane tower, tower top streams are extracted as isomerization products, and tower bottom streams enter a front isomerization reactor to generate isomerization reaction; liquid phase streams obtained by the gas-liquid separation of outlet streams of the front reactor are separated in a de-isohexane tower, and tower top streams and tower bottom streams of the de-isohexane tower are extracted and then mixed with the tower top streams of the de-isopentane tower and are together taken as a gasoline-stripping stabilization system of the isomerization products; siding streams of the de-isohexane tower are extracted into a rear isomerization reactor; and liquid phase streams obtained by the gas-liquid separation of reaction streams of the rear isomerization reactor completely return and are mixed with the liquid phase streams of a gas-liquid separator of the front isomerization reaction system and together taken as feeding materials of the de-isohexane tower. The method has higher normal paraffin isomerization ratio, wherein the C6 normal paraffin realizes the complete isomerization basically, thereby greatly improving the octane number of the light hydrocarbon materials.
Owner:CHINA PETROLEUM & CHEM CORP +1

Anti-carbon-formation chromium-based catalyst for preparing propylene from propane through oxydehydrogenation, and preparation method and application thereof

The invention provides an anti-carbon-formation chromium-based catalyst for preparing propylene from propane through oxydehydrogenation, and a preparation method and application thereof, belonging tothe technical field of chemical catalysis. According to the invention, rod-like alumina originated from ZL201110196192.4 and rich in unsaturated ligand is used as a carrier; since the surface of the Al2O3 has a great number of hydroxyl unsaturated ligand Al<3+>, the active component Cr2O3 can be better anchored, strong interaction among the Cr2O3 and the Al2O3 is formed, agglomeration of the Cr2O3during a reaction is prevented, side reactions are inhibited, and propylene is prevented from carbon formation due to further dehydrogenation and polymerization; thus, the catalyst is allowed to maintain high propylene selectivity and is improved in stability. Therefore, the Al2O3 used as the carrier is helpful for improving the selectivity and inactivation resistance of the catalyst. Compared with conventional catalysts, the catalyst provided by the invention is high in propylene selectivity, slow in carbon formation and inactivation rates, high in stability and greatly improved in mechanical strength, and has good industrial application prospects.
Owner:DALIAN UNIV OF TECH

Method for producing isobutene from MTO byproduct C4

The invention discloses a method for producing isobutene from an MTO byproduct C4. The method comprises the following steps: (1) an MTO byproduct C4 raw material and hydrogen enters a hydrogenation reactor, and the content of butadiene is allowed to decrease to less than 100 ppm under the action of a selective hydrogenation catalyst; (2) hydrogen is separated from hydrogenation products and enters an n-butene skeletal isomerization reactor, and n-butene is isomerized into isobutene under the action of an isomerization catalyst; and (3) an isomerization product enters a gas-liquid separation tank and is cooled, a separated gaseous product and a separated liquid product both enter a fractionate tower, wherein the distance between the gaseous product and the top of the fractionate tower is 1 / 4 to 1 / 3 of the height of the fractionate tower and the distance between the liquid product and the top of the fractionate tower is 2 / 3 to 3 / 4 of the height of the fractionate tower, a mixed C4 product containing isobutene is extracted from the top of the fractionate tower, and C5<+> gasoline is extracted from the bottom of the fractionate tower. The method has the advantages of a low oil-generating ratio, short regeneration time and capability of processing a C4 raw material with high butadiene content.
Owner:CHINA PETROLEUM & CHEM CORP +1
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products