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

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 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 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 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.