30results about How to "Reduced tendency to break" patented technology

The invention relates to composite core-shell particles wherein the core is a porous, carbon-based matrix which contains silicon particles enclosed in pores of the matrix; the pores containing the silicon particles have a diameter of not less than 60 nm as determined by scanning electron microscopy (SEM); the shell can be obtained by carbonizing one or more carbon precursors selected from among the group comprising tars, pitches, hard carbon, soft carbon and hydrocarbons having 1 to 20 carbon atoms, resulting in a non-porous shell.

The invention discloses a catalytic conversion method capable of improving product distribution. The catalytic conversion method capable of improving product distribution is characterized in that high-quality raw oil and a hot-regenerated catalyst having low mean activity, relatively uniform activity distribution and wide particle size distribution contact with each other in a lower part of a reactor and undergo a cracking reaction to produce oil gas and a carbon-containing catalyst; the oil gas and the carbon-containing catalyst are fed upstream and undergo a selective hydrogen transfer reaction and an isomerization reaction under certain reaction conditions; and the reaction products are separated and the catalyst needing to be regenerated is subjected to steam stripping and regeneration and then is recycled. The catalytic conversion method provided by the invention can improve product distribution and reduce dry gas and coke yields. Through the catalytic conversion method capable of improving product distribution, catalyst particles have uniform sizes; local temperature distribution in regeneration is uniform; and catalyst fragmentation is reduced relatively.

The invention discloses a catalytic conversion method for improving product distribution. The method comprises the following steps of: allowing high-quality raw oil and a thermally regenerative catalyst with lower activity and coarse size distribution to contact on the lower part of a reactor to undergo cracking reaction, performing selective hydrogen transfer reaction and isomerization reaction on the generated oil gas and a carbon-containing catalyst in upstream under a certain reaction environment, separating reaction products, and stripping and regenerating spent catalysts for recycle. By the method, under the condition that the isobutene content in the liquefied gas and the olefin content in gasoline group composition are increased, the dry gas yield and coke are obviously reduced; and the particles of the catalysts are more uniform, so the local temperature distribution is more uniform in the regenerating process, and the breaking tendency of the catalysts is correspondingly reduced.

The invention discloses a catalytic conversion method for preparing propylene and high-octane value gasoline. Crude oil contacts a catalyst rich in mesoporous zeolite and with coarse particle size distribution for reaction; and reaction temperature, weight hourly space velocity and the weight ratio of the catalyst to the crude oil are sufficiently proper for preparing a reaction product comprising 12 to 60 percent of catalytic wax oil based on the weight of the crude oil in the reaction, wherein the weight hourly space velocity is 25 to 100 h<-1>; the reaction temperature is 450 to 600 DEG C;and the weight ratio of the catalyst to the crude oil is 1 to 30. The invention provides the catalytic conversion method based on the prior art, which particularly has the advantages of greatly reducing dry gas yield and coke yield at the same time of converting the heavy crude oil into the high-octane value gasoline and the propylene so as to realize the high-efficiency utilization of oil resources.

The invention discloses a catalytic conversion method for producing diesel and propylene in high yield. Raw oil is contacted with a catalyst in coarse particle size distribution in a reactor for reaction, the reaction temperature, weight hourly space velocity, and the weight ratio of the catalyst to the raw oil sufficiently ensures that a reaction product comprising catalytic wax oil which is 12 to 60 weight percent of the raw oil is obtained in the reaction, and the catalytic wax oil enters a hydrotreater for further treatment. The catalytic cracking, hydrotreating and a process of producing diesel in high yield are integrated, hydrocarbons such as alkane, alkyl side chain and the like in the raw material are selectively subjected to cracking and isomerization catalysis, aromatic hydrocarbon in the raw material is reduced to the greatest extent to enter diesel fraction, other components in the product are prevented from generating aromatic hydrocarbon through aromatization and other reaction so as not to remain the aromatic hydrocarbon in the diesel fraction, the raw material is converted into high cetane number diesel and propylene, the yield of dry gas and coke is greatly reduced, and the catalyst breaking trend and catalyst consumption are reduced.

The invention discloses a catalytic conversion method of petroleum hydrocarbon. High-sulfur wax oil is contacted with a heat regeneration catalyst at the lower portion of a catalytic cracking unit reactor and subjected to a cracking reaction, wherein the heat regeneration catalyst has a coarse particle size distribution and contains macropore zeolite and mesopore zeolite, the generated oil gas and a carbon-containing catalyst go up and are subjected to a selective hydrogen transfer reaction and an isomerization reaction under a certain reaction environment, the reaction oil gas is separated to obtain a reaction product containing liquefied gas, gasoline and catalytic wax oil, and the spent catalyst is recycled for use after stripping and regeneration, wherein the catalytic wax oil and optional other secondary processing wax oil are introduced into the hydrocracking unit for reaction, and preferably the hydrocracked tail oil is returned to the catalytic cracking unit. According to the method, the diesel oil yield and the cetane number of the diesel oil are increased, the yield of low carbon olefins such as propylene and butylene are increased, the hydrogen utilization rate of the raw materials is increased, and simultaneously the utilization rate of hydrogen in the raw materials is raised, so that the petroleum resource can be saved, and the method provides a novel approach for cleaning the refining process and the refined oil products.

The invention relates to a catalytic conversion method for producing high-cetane number light diesel oil, which comprises the following steps: contacting raw oil with a coarse-particle-size-distribution catalyst containing macroporous zeolite in a reactor to react, wherein the reaction temperature, the oil gas residence time and the weight ratio of catalyst to raw oil are such that the reaction product in which catalytic wax oil accounts for 12-60 wt% of the raw oil can be obtained; and the oil gas residence time is 0.1-5 seconds, the reaction temperature is 420-550 DEG C, and the weight ratio of catalyst to raw oil is 1-10. The method maximally and selectively cracks alkanes, alkyl aromatic side chains and the like in the raw material to enter the light diesel oil fraction of the product so as to ensure that the main component in the light diesel oil fraction is alkanes, thereby finally realizing the direct production of high-cetane number light diesel oil through catalytic cracking, and reducing the tendency to breaking of the catalyst and the consumption of the catalyst.

The invention discloses a catalytic conversion method for production of propylene and high-octane-value gasoline by crude oil, which is characterized in that: pretreated crude oil is used as raw oil and comes into contact with a catalyst, featured by rich mesopore zeolite and coarse particle diameter distribution, in a catalytic conversion reactor, reaction temperature, oil gas residence time and the weight ratio of the catalyst to the raw oil guarantee that the reaction results in a reaction product containing catalytic wax oil accounting for 12 to 60% of the raw oil by weight, wherein the weight hourly space velocity is 25 to 100h<-1>, the reaction temperature is 450 to 700 DEG C and the weight ratio of the catalyst to the raw oil is 1 to 30. The method achieves the conversion of low-quality crude oil into propylene and high-octane-value gasoline and simultaneously reduces the yield of dry gas and coke remarkably so as to realize the effective utilization of petroleum resources; and local temperature distribution is more uniform in the process of regeneration owing to more homogeneous particles of the catalyst, and the crushing tendency of the catalyst is correspondingly reduced.

The invention discloses a method for preparing light fuel oil and propylene from inferior raw material oil. The inferior raw material oil enters a first reaction area and a second reaction area of a catalytic conversion reactor in turn to contact a catalytic conversion catalyst with coarse particle size distribution so as to perform primary reaction and secondary reaction respectively; after the reaction product and the spent catalyst undergo gas-solid separation, the spent catalyst is subjected to steam stripping and charring in turn and then returned to the reactor for recycling; and the reaction product is separated to obtain propylene, gasoline, catalytic wax oil and other products, wherein the catalytic wax oil enters at least one of hydrotreatment device, an arene extraction device and a hydrocracking device so as to obtain hydrogenated catalytic wax oil, raffinate oil and hydrocracking tail oil. The method improves the yield of the light oil, reduces the yield of oil slurry, realizes efficient utilization of petroleum resources, reduces the consumption of the catalyst, and reduces the catalyst content of the catalytic wax oil.

The invention discloses a catalytic conversion method for diesel oil and propylene with high yield. Raw material oil is contacted with a catalyst with coarse particle size distribution in a reactor to react; reaction temperature, weight hourly space velocity and weight ratio of the catalyst to the raw material oil are sufficient so that a reaction product containing catalytic wax oil which is 12 to 60 weight percent of the raw material oil; and the catalytic wax oil is fed into a hydro-cracking device for further treatment. Catalytic cracking, hydro-cracking and high-yield diesel oil processes are organically combined, hydrocarbons such as alkane, alkyl side chain and the like in the catalytic raw materials are selectively cracked and isomerized, meanwhile, aromatic hydrocarbons in the raw materials are furthest reduced to enter the diesel oil fraction, and aromatic hydrocarbons generated by reaction of other components in the product such as aromatization and the like are prevented from being left in the diesel oil fraction; and when the raw materials are transformed into the diesel oil with high cetane number and the propylene, the yields of dry gas and coke are greatly reduced, and catalyst crushing tendency and catalyst consumption are reduced.

The invention discloses a catalytic conversion method of petroleum hydrocarbon. High-sulfur wax oil is contacted with a heat regeneration catalyst at the lower portion of a catalytic cracking unit reactor and subjected to a cracking reaction, wherein the heat regeneration catalyst has relatively low activity and coarse particle size distribution and contains macropore zeolite and mesopore zeolite, the generated oil gas and a carbon-containing catalyst go up and are subjected to a selective hydrogen transfer reaction and an isomerization reaction under a certain reaction environment, the reaction oil gas is separated to obtain a reaction product containing liquefied gas, gasoline and catalytic wax oil, and the spent catalyst is recycled for use after stripping and regeneration, wherein the catalytic wax oil and optional other secondary processing wax oil are introduced into the hydrocracking unit for reaction, and preferably the hydrocracked tail oil is returned to the catalytic cracking unit. According to the method, the diesel oil yield and the cetane number of the diesel oil are increased, the mass percentages of low carbon olefins such as propylene and butylenes in the liquefied gas are increased, the hydrogen utilization rate of the raw materials is increased, and simultaneously the utilization rate of hydrogen in the raw materials is raised, so that the petroleum resource can be saved, and the method provides a novel approach for cleaning the refining process and the refined oil products.

The invention relates to a prolific catalytic converting method for high-cetane diesel oil. The method comprises the step that the raw oil is contacted with and reacts with catalyst containing large-pore zeolite in a catalytic conversion reactor, wherein the reaction temperature, the oil gas retention time and the weight ratio of the catalyst to the raw oil ensures that the reaction products contain catalytic wax oil being 12wt.% to 60 wt.% of the raw oil can be obtained; the reaction temperature is from 420 to 550 DEG C; the oil gas retention time is from 0.1 to 5 seconds; the weight ratio of the catalyst to the raw oil is 1 to 10; and the catalytic wax oil is further processed by being added into a hydrocracking device. By using the method, the high-cetane diesel oil can be extremely produced. The cracking catalyst having oversized particle distribution can further improve the selectivity of dry gas and coke and can reduce the breaking tendency of the catalyst and the consumption of the catalyst.

The invention discloses a catalytic conversion method for producing high-quality light fuels from crude oil. The crude oil contacts and reacts with a catalyst which is rich in mesoporous zeolite and in coarse particle size distribution. The catalytic conversion method is characterized in that a reaction product containing catalytic wax oil which accounts for 12-60 wt% of the weight of raw material is obtained by the reaction temperature, weight hourly space velocity and the weight ratio of raw oil to catalyst, wherein the reaction temperature is 420-600 DEG C, the weight hourly space velocity is 25-100 hours<-1>, the weight ratio of catalyst to raw oil is 1 to 30, and the wax is catalyzed before hydrocracks. In the invention, crude oil catalytic converter and hydrocracking methods are provided, which, in particular, reduces dry gas and coke yield significantly while converting the poor quality of crude oil into high octane gasoline and high-cetane diesel fuel so as to achieve efficient use of oil resources, and reduce the broken tendency of the catalyst and the catalyst consumption.

The invention discloses a catalytic conversion method for improving cetane number and yield of diesel. Raw oil is contacted with a catalyst containing large pore zeolite in a catalytic conversion reactor for reaction, and the reaction temperature, oil gas retention period, and the weight ratio of the catalyst to the raw oil sufficiently ensure that a reaction product containing catalytic wax oil which is 12 to 60 weight percent of the raw oil is obtained in the reaction, wherein the reaction temperature is 420 to 550DEG C, the oil gas retention period is 0.1 to 5 seconds and the weight ratio of the catalyst to the raw oil is 1-10; and the catalytic wax oil enters a hydrogenation unit, and the obtained hydrogenated catalytic wax oil returns to the catalytic conversion reactor. By the method, the diesel with high cetane number is produced maximally, the cracking catalyst with coarse particle size distribution can further improve the selectivity of dry gas and coke, and the catalyst breaking tendency and the catalyst consumption are reduced.