30results about How to "High propylene content" patented technology

The inventive inorganic binder containing phosphorus and aluminum compounds comprises (by weight percentages) alumina 15-40, phosphorus pentoxide 45-80, and clay 1-40. The binder has P/Al weight ratio of 1-6, pH of 1-3, and solid content of 15-60 wt%. The preparation method includes mixing acid-soluble aluminum hydroxide and/or alumina, clay and deionized water; pulping into pulp having solid content of 15-45%; adding concentrated phosphoric acid into the pulp under stirring at P/Al weight ratio of 1-6; and reacting at 50-99 DEG C for 15-90 min. The preparation method can avoid binder solidification due to overheat caused by heat release of non-uniform local instantaneous intensive reaction of materials. The binder can improve wear resistance, activity and selectivity of FCC catalyst.

The invention discloses a combined process for treating residual oil. Boiling bed residual oil hydrotreatment, delayed coking, wax oil hydrotreatment and catalytic cracking are organically combined in the method. The method concretely comprises the following steps of: enabling a liquid-phase product obtained after residual oil raw materials are subjected to boiling bed hydrotreatment to directly enter a coking fractional distillation column to be in countercurrent contact with oil gas generated through coking, and then, carrying out fractional distillation to obtain a wax oil fraction, and enabling the wax oil fraction to enter a wax oil hydrotreatment device, wherein the liquid-phase product is not subjected to fractional distillation; enabling the obtained liquid-phase product as a raw material to enter a catalytic cracking unit for treating; enabling circulating oil obtained through the fractional distillation of the coking fractional distillation column to return to a delayed coking unit; generating gasoline and diesel products by the coking fractional distillation column; and carrying out catalytic cracking and fractional distillation to obtain liquefied gas, gasoline and diesel products. Compared with the prior art, the combined process has the advantages that a hydrogenization fractional distillation column can be omitted, the investment cost can be reduced, the coking and catalytic cracking raw material sources are expanded, and the coked and catalyzed light oil yield is increased; and meanwhile, the reaction heat energy is sufficiently utilized, and the production energy consumption is reduced.

The present invention relates to the use in multi-stage reactors selected from ethylene, C ₃ -C ₈ Monomers of alpha-olefins and non-conjugated dienes Process for preparing polymer compositions such as EPDM compositions. In particular, the present invention relates to a method for increasing the conversion rate of diene monomer by using multi-stage reactors and metallocene catalyst system when preparing the above polymer composition.

The invention provides a vanadium catalyst which consists of a main catalyst and an auxiliary catalyst, wherein the main catalyst is formed by matching a vanadium compound with an electron donor, or by a vanadium complex with an electron donor; the vanadium compound is V(acac)3, VO(OR)3, VO(acac)3, VO(OR)2Cl, VO(OR)Cl2, VCl4 or VOCl3; the ligand of the vanadium complex is fatty alcohol, amines, phosphates, beta-diones, 8-hydroxyquinoline or oximes; the electron donor is a mononuclear aromatics compound, an acrylic compound, a methacrylate compound, a compound in the formula (I) structure, a compound in the formula (II) structure, and a compound in the formula (III) structure. The stability of the vanadium catalyst on water, air and oxygen is stability. When being used for copolymerization of ethylene and propylene, the vanadium catalyst is high in reaction activity, and the obtained propylene is high in content, and controllable in a structure.

The invention relates to phosphorus and rare earth synergistically modified ZSM-5. The phosphorus and rare earth synergistically modified ZSM-5 is composed of the following substances in percentages by mass: 1% to 5% of bentonite, 3% to 5% of titanium dioxide, 3% to 5% of calcium oxide, 2.5% to 3.8% of zinc oxide, 1.1% to 2.7% of copper oxide, 1% to 2.5% of a toughening modifier, 1.1% to 2.1% of acoupling agent, 5.5% to 15% of sepiolite, 4% to 6% of ethyl silicate, 3% to 9% of hollow glass beads, 20% to 35% of aluminum ash, 6% to 11% of quartz sand, 2% to 5% of sodium carbonate, 3.5% to 5.5%of phosphorus pentoxide and 1.1% to 4.8% of light rare earth, with the balance being a silica sol. The method for increasing propylene yield by catalysis comprises two steps, i.e., a step of raw material pretreatment and a step of material mixing. The phosphorus and rare earth synergistically modified ZSM-5 provided by the invention effectively improves the hydrothermal stability of a ZSM-5 molecular sieve, has high activity, long service life and good propylene selectivity, has good compounding effect with a catalytic cracking main catalyst in propylene production, can greatly improve the catalytic cracking conversion efficiency of raw materials, greatly increases the production efficiency of liquefied gas and the content of propylene in the liquefied gas, thereby achieving the purpose ofimproving the efficiency and quality of propylene production operation.

The invention discloses a device and method for producing high-propylene cracking gas and low-olefin gasoline and belongs to the field of catalytic cracking. In the device, a first lifting pipe outlet, a first settler inlet and catalyst outlet, a first catalytic cracking regenerator and a first lifting pipe catalyst inlet are communicated with each other in turn; a second lifting pipe outlet, a second settler inlet and catalyst outlet, a second catalytic cracking regenerator and a second lifting pipe catalyst inlet are communicated with each other in turn; and a first settler oil gas outlet, a first fractionating tower raw material inlet and gas phase outlet, a first cooler, a first gas-liquid separator inlet and liquid phase outlet, a second lifting pipe raw material inlet and outlet, a second settler inlet and oil gas outlet, a second fractionating tower raw material inlet and gas phase outlet, a second cooler and a second gas-liquid separator are communicated with each other in turn. The device provided by the invention adopts different catalysts for heavy oil and light oil, is capable of increasing the catalytic selectivity and is capable of obtaining the high-propylene cracking gas and the low-olefin gasoline.

The invention relates to a preparation method of a rare earth modified hierarchical porous ZSM-5 molecular sieve for yield increase of propylene. The preparation method comprises four steps of material mixing, material modulation, molding processing and modification molding. The preparation method is low in raw material cost, small in toxic and side effects, simple in processing and production process, low in production cost and small in environmental pollution. On one hand, the hydrothermal stability of the ZSM-5 molecular sieve is effectively improved, the activity is high, the service lifeis long, and the propylene selectivity is good; on the other hand, the compounding effect between the ZSM-5 molecular sieve and a catalytic cracking main catalyst in propylene production is good, so that the catalytic cracking conversion efficiency of the raw material can be greatly improved, and the liquefied gas production efficiency and the propylene content in liquefied gas are greatly improved.

The invention provides a catalytic cracking and gasoline hydrogenation combined method which comprises the following steps: carrying out a catalytic cracking reaction on a catalytic cracking raw material, and sequentially carrying out fractionation, separation, desorption, absorption and stabilization to obtain dry gas, liquefied gas, light naphtha, diesel oil and slurry oil; 60-70 wt% of light naphtha and gasoline are sequentially subjected to a gasoline hydrogenation reaction and gasoline hydrogenation separation, and a delivery material and a recycling material are obtained, wherein the distillation range of the light naphtha controls the content of C3 + C4 to be less than 1wt% and the dry point to be 70 DEG C, the distillation range of the recycled material controls the initial boilingpoint to be more than 40 DEG C and the final boiling point to be 90-101 DEG C; 30%-40% of the light naphtha and the recycled material return to continue the catalytic cracking reaction. According tothe method, 30-40% of light naphtha, a recycled material and a catalytic cracking raw material are subjected to a catalytic cracking reaction together so that the yield of liquefied gas and the content of propylene in the liquefied gas are both increased, and the content of ethylene in dry gas is also obviously increased.

The present invention relates to a catalytic cracking method for improving heat distribution, the method comprising: (1), feeding catalytic cracking feedstock oil into the first reaction zone of a catalytic cracking reactor to contact with a catalytic cracking catalyst and performing the first catalytic cracking reaction (2), continuing the second catalytic cracking reaction in the second reaction zone of the catalytic cracking reactor with the first reaction product and the half spent catalyst of the gained, to obtain the second reaction product and the spent catalyst; into the second reaction zone of the catalytic cracking reactor to contact with the first reaction product and the half spent catalyst and carry out the second catalytic cracking reaction together. The method of the invention can improve the heat distribution of the catalytic cracking reactor and improve the distribution of reaction products.

The invention relates to the field of organic matter recovery from gas and discloses a device and a method for recovering C2 from catalytic dry gas. The device comprises a C4 absorption tower, a C4 desorption tower and a second gasoline absorption tower which are connected sequentially as well as a first gasoline absorption tower and a gasoline stabilization tower which are connected. The method comprises the following steps: C4 is contacted with the catalytic dry gas, so that heavy components of C2 or higher in the catalytic dry gas are absorbed; the absorbed C4 and heavy components of C2 orhigher are subjected to first rectification, and crude C2 and C4 are obtained by separation; gasoline is contacted with crude C2, then heavy components in crude C2 are absorbed, and C2 is further separated out; remaining gasoline-containing components are contacted with unabsorbed light components, C4 entrapped in the light components is absorbed, a mixture of absorbed C4 and gasoline is subjectedto second rectification, and C4 and gasoline are separated and reused to previous steps respectively. With adoption of the method, C2 can be recovered from the catalytic dry gas effectively, and content of propylene, ethane and C4 in a product is lower.

The invention relates to the field of catalytic cracking reactions, and discloses a catalytic cracking method and a catalytic cracking system. The method is characterized in that a catalytic crackingraw material is subjected to a catalytic cracking reaction in a riser reactor under the action of a pre-lifting medium; a gas phase is separated from a reaction product; the gas phase is injected intoan absorption tower for treatment; lean gas is collected from the top of the absorption tower, and at least part of the lean gas is used as the pre-lifting medium. The catalytic cracking system comprises a reaction device configured with the riser reactor and the absorption tower; the gas phase outlet on the top of the reaction device is communicated with the gas phase inlet of the absorption tower; the lean gas outlet on the top of the absorption tower is communicated with the pre-lifting medium inlet at the bottom of the riser reactor. Through adopting the catalytic cracking method and thecatalytic cracking system disclosed by the invention, the gas phase load of a reabsorption tower can be reduced; the absorption effect is effectively improved; propylene components carried in dry gasare reduced.