90results about How to "Reduced dry gas yield" patented technology

A method for producing propylene and light aromatic hydrocarbon comprises the steps of contacting heavy hydrocarbons and / or grease with a cracking catalyst containing modified beta zeolite in a first reactor for catalytic cracking reaction, contacting C4 hydrocarbon fraction and / or light gasoline fraction with the cracking catalyst containing modified beta zeolite in a second reactor for catalytic cracking reaction, and then leading the reaction products into a third reactor for reaction. The hydrocarbon-gasoline conversion method provided by the invention has the advantages of higher propylene yield and light aromatic hydrocarbon yield.

The invention relates to an aromatization catalyst comprising two molecular sieves of ZSM-5 and MCM-22, wherein the molecular sieves are in a hydrogen type, the total weight percentage of the two molecular sieves is 10-90 in the catalyst, the weight rate of the molecular sieve ZSM-5 and the molecular sieve MCM-22 is 90:10-50:50, the molecular sieve ZSM-5 is modified by phosphorus and a rare-earth element, and the molecular sieve MCM-22 is modified by zinc. The preparation method of the aromatization catalyst comprises the following steps of: firstly, modifying the two molecular sieves respectively; and then preparing the catalyst. The aromatization catalyst has higher aromatic yield, lower dry-gas yield and higher acrylic yield when being used for aromatizing n-alkane, cyclane, naphtha, and the like.

The invention discloses a catalytic conversion method for preparing propylene and high octane gasoline. Raw oil of different cracking properties enters different reaction regions of a first riser reactor to contact with catalytic cracking catalysts for carrying out cracking reactions so as to separate a spent catalysts from reaction oil gas; the reaction oil gas is separated for obtaining a product comprising the propylene, gasoline and a re-cracking raw material, wherein the re-cracking raw material is transmitted into a second riser reactor to contact with hot regenerated catalysts for carrying out catalytic conversion; and after the spent catalysts in the two riser reactors are burned in a same regenerator, the spent catalysts are respectively returned to the two riser reactors. In themethod, the yields of the propylene and the gasoline are obviously increased; the octane value of the gasoline is also obviously improved. Under the condition of largely increasing the yield of the propylene, the yield of dry gas is obviously reduced by more than 80% by weight.

A process for modifying kaolinite includes such steps as proportionally mixing kaolinite, dispersing modifier, acid solution and deionized water, beating, calcining, cooling, and washing with deionized water. The modified kaolinite has large specific surface area and pore volume, and high catalytic activity.

The invention discloses a treatment method for improving the selectivity of a catalytic cracking catalyst, which comprises the following steps: filling a fresh catalyst into a phase fluidized bed, contacting the fresh catalyst with aging medium containing water vapor, aging under a certain hydrothermal condition to obtain an aged catalyst; and adding the aged catalyst into an industrial catalytic cracking device. In the method, the activity and selective distribution of the catalyst in the catalytic cracking device are more uniform to obviously improve the selectivity of the catalytic cracking catalyst, thereby obviously reducing dry gas productivity and coke productivity.

The invention discloses a hydrocracking method of low-nergy-onsumption productive high-quality chemical raw materials. After raw oil and hydrogen are mixed, the obtained mixture is subjected to heat transfer for two times and then passes through a heating furnace, the obtained object is sequentially subjected to hydrorefining and then passes through a first cracking reaction area, the obtained product is separated so as to obtain middle distillate, the middle distillate enters a second cracking reaction area to crack, wherein the first cracking reaction area is at least filled with two cracking catalysts, a catalyst I is filled in the upstream part, and a catalyst II is filled in the downstream part; and the catalyst I contains 30-70% of modified Y molecular sieve, the catalyst II contains 15-50% of modified Y molecular sieve, and the content of the modified Y molecular sieve in the catalyst I is 10-30% higher than the content of the modified Y molecular sieve in the catalyst II. In the method disclosed by the invention, a high-temperature and high-pressure countercurrent heat transfer technology and a hydrocracking catalyst grading technology are organically combined, and through the comprehensive utilization of hydrocracking reaction heat, while the selectivity of catalysts is maintained, the product quality is enhanced, and the construction investment and the energy consumption of operation are reduced.

The invention relates to a catalytic cracking method which comprises the following steps of: enabling heavy raw materials to be in contact with a catalyst containing shape selective zeolite with average hole diameter of less than 0.7nm in a first raising pipe reactor for performing cracking reaction, and enabling light raw materials and cracked heavy oil to be in contact with the catalyst containing the shape selective zeolite with the average hole diameter of less than 0.7nm in a second raising pipe reactor and a fluidized bed reactor for performing the cracking reaction. The method is used for catalytic cracking of the heavy oil, the conversion rate of the heavy oil and the yield of propylene are high, and the yield of dry gas and coke is low.

The invention provides a light hydrocarbon aromatization catalyst which comprises a composite carrier and modified components, wherein the modified components comprise the following compositions which are calculated based on the carrier in mass percentage by mass percent: 1.0-10.0% of ZnO, 0.5 to 10.0% of rare earth oxide; the composite carrier comprises 10 to 90% of H zeolite socony mobile-5 (HZSM-5) and 10 to 90% of silica. The catalyst preparation is simple and has high aromatization activity and selectivity on light hydrocarbon, and the carbon-depositing amount of the catalyst after reaction is less. With mixed C4 as a raw material for aromatization reaction, the yield of aromatics reaches 50 % by mass and the one-way service life of the catalyst lasts as long as 700 hours.

A modified catalyst of C3-C11 petroleum spirit, comprising 0.1-5.0 mass% of mixed rare-earth oxide or antimony trioxide, 95.0-99.1 mass% of carrying agent, wherein the carrying agent comprises 50-80 mass% of HZSM-5 zeolite and 20-50 mass% of gamma-aluminum oxide. The catalyst fits for low octane rating gasoline modification for boosting the octane and lowering olefin content.

The invention discloses a catalytic conversion method for producing propylene. Raw material which is difficult for cracking is contacted with a thermal regeneration catalyst, and cracking reaction is carried out under the conditions that the reaction temperature is 600 DEG C to 750 DEG C, the weight hourly space velocity is 100-800h<-1>, the reaction pressure is 0.10MPa to 1.0MPa, the weight ratio of the catalytic cracking catalyst and raw material is 30 to 150, and the weight ratio of steam and raw material is 0.05 to 1.0. The reaction material flow is mixed with raw oil which is easy to be cracked, and cracking reaction is carried out under the conditions that the reaction temperature is 450 DEG C to 620 DGE C, the weight hourly space velocity is 0.1-100 h<-1>, the reaction pressure is 0.10MPa to 1.0MPa, the weight ratio of the catalytic cracking catalyst and raw material is 1.0 to 3.0, and the weight ratio of the steam and raw material is 0.05 to 1.0; then a spent catalyst and reaction oil gas are separated, the spent catalyst returns to a reactor after regeneration, and the target products comprising propylene and recracking raw material are obtained by separating the reaction oil gas. By adopting the method of the invention, the yield of the propylene and the selectivity of the propylene in liquefied gas are increased greatly, moreover, the yield of dry gas is reduced obviously.

The invention discloses a hydrocracking method of a high-yield high-quality chemical raw material. According to the hydrocracking method comprises following steps: raw oil and hydrogen are subjected to hydrofinishing and are delivered through a first cracking reaction zone successively, and middle fraction oil is obtained via separation, and is delivered to a second cracking reaction zone for cracking; the first cracking reaction zone comprises two cracking catalysts, an upper zone is filled with a catalyst I, and a lower zone is filled with a catalyst II; the catalyst I comprises 30 to 70% of modified Y molecular sieve; the catalyst II comprises 15 to 50% of modified Y molecular sieve; and the content of the modified Y molecular sieve in the catalyst I is 10 to 30% higher than that in the catalyst II. Acid center of the catalyst I matches hydrogenation center, and the catalyst I possesses excellent heavy naphtha selectivity; and the catalyst II possesses excellent aromatic hydrocarbon transformative capacity, and is capable of transforming aromatic hydrocarbons in heavier components into smaller molecules so as to distribute in heavy petroleum fractions. The two catalysts are combined, so that demands of the high-yield high-quality chemical raw material are satisfied.

The invention provides a catalyst for producing propane and high octane number gasoline by using butane. The catalyst comprises, by mass, 20-85% of mesoporous Si-Al zeolite and 15-80% of a binder, and has an alpha value of 25-50. With the catalyst of the present invention, butane can be converted into propane under a certain reaction condition, and a high octane number gasoline blending component is by-produced, wherein the produced propane is used for ethylene cracking raw materials and other chemical industry uses, and the high octane number gasoline blending component is used for blending catalytic cracking gasoline so as to substantially reduce olefin content.

The invention provides a high treatment capacity feed atomizing nozzle, and belongs to the field of petrochemical equipment. A combined cyclone, a multi-point gas injection structure and a spray-head with a porous impinging structure are adopted; and a hard alloy surfacing structure is adopted at orifices. The nozzle is suitable for feed atomizing nozzles of heavy oil FCC devices with the yield of 3,500,000-6,000,000 tons / year, the treatment capacity of a single nozzle is 60-100t / h, and a defect that the dimension of the nozzle is changed due to high treatment capacity so as to cause low atomizing effect is improved; meanwhile, the nozzle has the atomized particle size in a range of 60+ / -10 mu m, the liquid layer on the injected sector surface is distributed uniformly, the yield of light oil is high, the productivity of dry gas is low, and the coking in the tubes is improved; besides, the steam consumption is low, and the gas / liquid ratio is between 3 and 6 percent (raw materials). In addition, the injecting speed of the nozzle is medium, a phenomenon that a catalyst is broken cannot occur in the production, and the nozzle has high wear resistance and the service life of more than 5 years.

The invention discloses a catalytic conversion method for preparing propylene and high octane gasoline. After entering different reaction regions of a first riser reactor, raw oils with different cracking performances are contacted with catalytic cracking catalyst to carry out cracking reaction so as to separate a spent catalyst and reaction oil gas, wherein the spent catalyst subject to steam stripping enters a first regenerator to be regenerated by scorching and returns to a first riser, and a product containing the propylene, the gasoline and recracking raw materials is obtained through separation of the reaction oil-gas, wherein the recracking raw materials are sent into a second riser reactor and are contacted with thermal regeneration catalyst to carry out catalytic conversion, and the spent catalyst returns to the second riser reactor after coke burning regeneration in a second regenerator. In the method, the yield of the propylene and the yield of the gasoline are obviously increased, and the gasoline octane number is obviously improved; and under the condition that the propylene yield is dramatically increased, the dry gas yield is obviously lowered by above 80 weight percent.

The heavy oil and residual oil combined treating process includes the following steps: hydrocracking heavy oil and residual oil material in a suspended bed in mild condition; fractionating the hydrocracked resultant into light fraction, heavy fraction and un-converted vacuum residue, which accounts for 20-45 wt% of the material; catalytically cracking the heavy fraction; and solvent deasphalting the un-converted vacuum residue to obtain deasphalted oil serving as the catalytically cracking material. The process of the present invention has stable hydrocracking operation in suspended bed, can utilize all the fractions in the material, and is suitable for treating various kinds of heavy oil and residual oil.

The invention relates to a high-chlorine raw material catalytic conversion method, wherein a high temperature regeneration catalyst enters the pre-rising section on the lower portion of a riser reactor, flows upward under the effect of a pre-rising medium, and then enters the oil agent initial contact reaction region on the lower portion of the riser reactor, a pre-heated high-chlorine raw material is introduced into the lower portion of the oil agent initial contact reaction region, the pre-heated high-chlorine raw material and the high temperature regeneration catalyst contact, react and rise, the formed oil agent mixture enters a riser main reaction region, a hydrocarbon conversion reaction is continuously performed in the main reaction region, the formed oil agent mixture is subjected to gas-solid separation through the reactor outlet, the separated catalyst with charcoal is subjected to steam stripping and charring so as to be recycled, and the separated reaction oil gas is conveyed to the subsequent product separation system. According to the present invention, with the method, the high-chlorine raw material can be directly processes, the high-chlorine raw material conversion rate is improved, and the product selectivity is improved; and the method is simple and is easy to perform, and the method can be achieved only by carrying out simple transforming on the conventional catalytic cracking equipment.

The catalysis conversion method for petroleum hydrocarbon comprises: in a reactor with a mixing zone, a first and second reaction zone, forcing regenerative agent and carry-carbon agent from second zone into mixing zone and flow into first zone by pre-hoisting medium; in the first zone, contacting and reacting between the material oil and said mixed agents, making the oil-agent mixed material up to second zone for continuing reaction; returning some reacted carry-carbon agent to mixing zone for recycle; separating reacted oil-gas to send to subsequent separation system and other catalysts for recycle after steam stripping. This invention reduces dry gas yield, strengens the hydrogen-transfer reaction, and decreases the olefin content.

The invention relates to an aromatization method for producing light aromatics, which comprises the step of making C4 hydrocarbon and C9+ heavy aromatics which are used as raw materials react with aromatization catalysts at 400 to 600 DEG C through sufficient contact under the condition without hydrogen. The method can greatly improve the yield of the light aromatics, can also reduce the dry gas yield and can provide an economic and effective path of processing remained light aromatics and heavy aromatics resources for the refinery.

The invention discloses a hydrocracking method of low-nergy-onsumption productive high-quality chemical raw materials. After raw oil and hydrogen are mixed, the obtained mixture is subjected to heat transfer for two times and then passes through a heating furnace, the obtained object is sequentially subjected to hydrorefining and then passes through a first cracking reaction area, the obtained product is separated so as to obtain middle distillate, the middle distillate enters a second cracking reaction area to crack, wherein the first cracking reaction area is at least filled with two cracking catalysts, a catalyst I is filled in the upstream part, and a catalyst II is filled in the downstream part; and the catalyst I contains 30-70% of modified Y molecular sieve, the catalyst II contains 15-50% of modified Y molecular sieve, and the content of the modified Y molecular sieve in the catalyst I is 10-30% higher than the content of the modified Y molecular sieve in the catalyst II. In the method disclosed by the invention, a high-temperature and high-pressure countercurrent heat transfer technology and a hydrocracking catalyst grading technology are organically combined, and through the comprehensive utilization of hydrocracking reaction heat, while the selectivity of catalysts is maintained, the product quality is enhanced, and the construction investment and the energy consumption of operation are reduced.

A modified catalyst of C3-C11 petroleum spirit, comprising 0.1-5.0 mass% of mixed rare-earth oxide or antimony trioxide, 95.0-99.1 mass% of carrying agent, wherein the carrying agent comprises 50-80 mass% of HZSM-5 zeolite and 20-50 mass% of gamma-aluminum oxide. The catalyst fits for low octane rating gasoline modification for boosting the octane and lowering olefin content.

The invention discloses a catalytic cracking method. The method comprises steps of: introducing dry gas and C4 hydrocarbon into a middle and lower part of a stripping section of a sub-precipitator to react with a gasoline coked catalyst; introducing the oil gas after reaction into a sub-fractionating column; introducing part of the coked catalyst treated with steam stripping into a regenerator for regeneration, and introducing the other part of the coked catalyst treated with steam stripping into a pre-lifting mixer and mixing with a regenerative agent from the regenerator; and returning the mixed catalyst to a heavy oil riser reactor. The method can reduce yield of dry gas by 0.3-1.5 percentage, reduce yield of liquefied gas (not including propylene) by 2.0-8.0 percentage, increase yield of gasoline by 1-4 percentage, and increase yield of propylene by 0.5-2.5 percentage.

The invention discloses gas-solid contact equipment for a fluidized bed, which is used for catalytic conversion devices in petroleum refining, petrochemical industry and other industries so as to solve the problems of non-flowing region, local slugging of gas or local solid bridging and the like which are easy to generate respectively when the conventional contact equipment is provided with a corresponding tray-type inner component or a filler, and the problems that the inner component or filler is difficult to install, overhaul and maintain. The contact equipment is at least provided with two groups of fillers (1) along the axial direction of a cylinder body (4), and a space is reserved between the two groups of fillers; each group of filler consists of a plurality of filler layers which are overlapped along the vertical direction, each filler layer is provided with a vertical hexagonal channel formed by strip plates, and the cross section shape of the hexagonal channel is a regular hexagon shape; and in each group of filler, the hexagonal channels on two adjacent filler layers are alternately arranged. The equipment can be used as a stripper to strip oil gas, hydrocarbon or gas impurities carried in the catalyst, and also can be used as a regenerator to regenerate the catalyst.

The invention relates to a catalytic conversion method capable of improving product selectivity. The method comprises the step of carrying out reaction on a raw material oil and a carbon-containing catalyst in a reactor, and is characterized in that the carbon content in the catalyst is 0.15-0.8wt%. The invention relates to the catalytic conversion method capable of improving product selectivity, particularly a method capable of converting a heavy raw material into a high-value product such as gasoline, greatly reducing the yield of dry gas and coke, and realizing the high-efficiency utilization of petroleum resources.

The invention relates to a method for preparing BTX and co-producing tetramethylbenzene from C9<+> heavy aromatic hydrocarbons. The method comprises: carrying out catalytic cracking conversion on C9<+> heavy aromatic hydrocarbons to obtain a first-stage hydrocarbon mixing product using BTX and trimethylbenzene as main components, and separating respectively with an ethane removing tower, a butane removing tower, a hexane removing tower, a BTX removing tower and a trimethylbenzene removing tower to obtain dry gas, liquefied gas, C5-C6 non-aromatic hydrocarbons, BTX, trimethylbenzene and C10<+> heavy aromatic hydrocarbons, wherein the dry gas, the liquefied gas, the C5-C6 non-aromatic hydrocarbons and the BTX are adopted as products; carrying out a reaction on the trimethylbenzene and a certain amount of methanol to obtain a tetramethylbenzene-rich second-stage mixing product, and separating the products to obtain dry gas, wastewater and liquid-state hydrocarbons, wherein the liquid-state hydrocarbon products return to the ethane removing tower so as to be separated; and carrying out crystallization separation on the C10<+> heavy aromatic hydrocarbons to obtain tetramethylbenzene and a heavy component residue liquid, wherein the tetramethylbenzene and the part of the heavy component residue liquid are adopted as the product, and the remaining heavy component residue liquid return to a catalytic cracking reactor. According to the present invention, with the method, the moving bed non-hydrogen cracking and the tetramethylbenzene preparation using trimethylbenzene alkylation are compounded, such that the BTX is produced at a maximum while the high added value tetramethylbenzene can be co-produced.

A low-quality oil catalytic cracking process is characterized in that light diesel produced from the low-quality oil by catalytic cracking is partially or entirely reprocessed to correspondingly reduce the feed amount of fresh materials. As a result, the yield of light diesel is reduced greatly or even reduced to zero relevant to fresh catalytic material; the yields of liquefied gas and gasoline are improved greatly and the propylene yield is improved correspondingly; and the slurry oil can be partially reprocessed so that the light oil yield is improved greatly in comparison with the process for withdrawing all of the slurry oil. Since the yield of catalytic cracked diesel with low cetane number is reduced greatly, qualified commodity diesel can be prepared from straight-run diesel more easily by refinery plant.

The invention relates to a molecular sieve-containing alumina pellet and a preparation method thereof. The preparation method comprises: (1) preparation of a mixed sol: mixing pseudo-boehmite, urea and deionized water to obtain an aluminum hydroxide suspension liquid, adding a first acid solution to the aluminum hydroxide suspension liquid, carrying out first peptization to obtain an alumina sol,mixing the alumina sol and a molecular sieve, adding a second acid solution, and carrying out second peptization to obtain a mixed sol; and (2) preparation of molecular sieve-containing alumina pelletby hot oil column molding: mixing the mixed sol obtained in the step (1) and hexamethylenetetramine, adding into a hot oil column in a dropwise manner, molding to obtain pellets, taking out the molded pellets, washing, drying, and roasting to obtain the molecular sieve-containing alumina pellet. According to the present invention, the obtained molecular sieve-containing alumina pellet has characteristics of high molecular sieve content and high crushing strength.

A catalyst for preparing oil products from used plastics is prepared from zeolite, components A, B and M, Na, Ca and Fe through washing zeolite with the solution of ammonium oxide, proportionally mixing with others, adding alpha-AlO(OH) powder and sodium silicate, stirring, granulating and calcining at 350-750 deg.C. Its advantages are low cost, long service life, and high output rate and quality of resultant oil products.

The invention relates to a catalytic conversion method and a device for productive low-carbon olefin, and the method comprises the steps: carrying out the contact reaction of a first hydrocarbon raw material and a catalyst from a regenerator in a first riser reactor, and carrying out the contact reaction of a heavy hydrocarbon raw material, a second hydrocarbon raw material and a catalyst from a regenerator in a second riser reactor, introducing the reacted oil mixture into the fluidized bed reactor for continuous reaction, sequentially performing contact reaction on a third hydrocarbon raw material and a catalyst from a regenerator in a first reaction zone and a second reaction zone of a third riser reactor, separating the reacted oil mixture through a separation device, and introducing the catalyst into a stripper for stripping; introducing heavy hydrocarbons into the bottom of the second riser reactor, and selecting the third hydrocarbon raw material from distillate oil with the distillation range of 180-360 DEG C, preferably distillate oil with the distillation range of 200-340 DEG C. The method provided by the invention can obviously improve the yields of ethylene and propylene.

The invention relates to a catalytic conversion method for producing propylene and fuel oil. The method comprises the following steps: carrying out a catalytic conversion reaction on preheated a light hydrocarbon oil raw material and carbon dioxide in the first reaction zone of a reactor in the presence of a catalytic conversion catalyst, injecting a reaction material in the first reaction zone of the reactor to the second reaction zone of the reactor, and carrying out a catalytic conversion reaction on the injected reaction material and injected carbon dioxide. High propylene yield and high yield of gasoline with high octane number can be obtained through the catalytic conversion method for producing propylene and fuel oil.