58results about How to "Conducive to long cycle operation" patented technology

The invention relates to a nano-beta molecular sieve with low Si / Al ratio and a synthesis method thereof. The method uses a low-cost microporous molecular sieve of FAU configuration as an aluminum source to synthesize the nano-beta molecular sieve under the condition of adding a conventional silicon source and a non-toxic cheap template agent. The Si / Al molar ratio of a framework of the nano-betamolecular sieve is between 4 and 9, grains are spherical or cuboidal, and the grain size is between 30 and 200nm. Due to the two characteristics of low Si / Al ratio and nanoscale grain size, the nano-beta molecular sieve can remarkably improve catalytic activity and inhibit the generation of coking at the same time. A raw material, namely the FAU molecular sieve adopted by the method has lower cost, so the method is particularly suitable for industrial mass production and industrial application.

The invention relates to a catalyst for selective hydrogenation of unsaturated hydrocarbons. The catalyst comprises a silica-alumina carrier and metal active components nickel, molybdenum and magnesium loaded on the carrier, and comprises the following components based on the total weight of the catalyst: The nickel oxide content is 7-18wt%, the molybdenum oxide content is 3.5-12wt%, the magnesium oxide content is 0.05-2.0%, and the silica-alumina carrier content is 75-91wt%. The mesopores of the carrier account for 3-70% of the total pores, and the macropores account for 1.5-55% of the total pores. The catalyst is prepared by an impregnation method, and the catalyst has good colloid resistance, arsenic resistance, sulfur resistance and water resistance.

The invention relates to a catalyst for selective hydrogenation of pyrolysis gasoline. The catalyst comprises a silicon oxide-alumina carrier and a metal active component palladium loaded on the carrier. The content of palladium is 0.15-0.45 wt% based on the total weight of the catalyst. The silica-alumina carrier contains 0.1-12wt% of silicon oxide, 0.1-10wt% of nickel-doped lanthanum ferrite, 0.05-6.8wt% of potassium, and the mesopores of the carrier account for 3-75% of the total pores, and the macropores account for 3-75% of the total pores. 1.5-60% of the total pores. The catalyst has good anti-colloid ability, strong anti-arsenic, anti-sulfur, and strong anti-water ability, especially suitable for the first stage of pyrolysis gasoline 6 -C 8 and C 8 The distillate is selectively hydrogenated.

The invention discloses a processing method of ethylene tar. The method consists of: fractionating ethylene tar into light fraction and heavy fraction, mixing the heavy fraction with a conventional coking raw material, conducting delayed coking to obtain coker gasoline, coker diesel oil and coker gas oil, mixing the obtained coker gasoline and coker diesel oil with the ethylene tar light fraction, leaving the mixture to undergo a hydrofining reaction, distilling the product to obtain gasoline fraction I and fraction heavier than gasoline; mixing the fraction heavier than gasoline with the coker gas oil, and subjecting the mixture to hydrotreating so as to obtain gasoline fraction II and a diesel oil product, and mixing the gasoline fraction I with the gasoline fraction II to obtain a final gasoline product. Directed at the characteristics of high content of aromatic hydrocarbon, colloid, carbon residue and asphaltene in ethylene tar, the method provided in the invention fractionates the ethylene tar into light fraction and heavy fraction, adopts different processing processes, increases the added value of ethylene tar, enhances the yields of gasoline and diesel oil, improves the product quality of light fuel oil, and also enables the equipment to run smoothly for a long period.

The invention discloses a treatment method of ethylene tar. The method consists of: fractionating ethylene tar into light fraction and heavy fraction, mixing the heavy fraction with a conventional coking raw material, conducting delayed coking to obtain coker gasoline, coker diesel oil and coker gas oil, mixing the coker diesel oil with the ethylene tar light fraction, performing rectification / crystallization purification to obtain naphthalene, mixing the naphthalene removed oil, naphthalene after-cut oil, with the coker gasoline and the coker gas oil, taking the obtained mixture as a hydrotreating raw material, leaving the material to undergo a hydrofining reaction, separating gasoline fraction I, subjecting the obtained fraction heavier than gasoline to hydrocracking so as to obtain gasoline fraction II and a diesel oil product, and mixing the gasoline fraction II with the gasoline fraction I so as to obtain a final gasoline product. Directed at the characteristics of high content of aromatic hydrocarbon, colloid, carbon residue and asphaltene in ethylene tar, the method provided in the invention fractionates the ethylene tar into light fraction and heavy fraction, and adopts different processing processes, thus increasing the added value of ethylene tar. While generating the chemical raw material naphthalene, the method also improves the product quality of light fuel oil, and also enables the equipment to run smoothly for a long period.

The invention relates to a pyrolysis gasoline one-section selective hydrogenation method. A catalyst is prepared from a silicon oxide-aluminum oxide carrier and a metal active ingredient palladium loaded on the carrier; the palladium content is 0.15 to 0.45 weight percent of the total weight of the catalyst; the pectin resistant capability of the catalyst is good; the anti-arsenic, anti-sulfur andwater-resistant capability is high. Under the hydrogenation process condition, the reaction inlet temperature is smaller than or equal to 45 DEG C; the reaction pressure is 2.5 to 4.5MPa; the hydrogen oil volume ratio is 60 to 450; the liquid volume space velocity is 3.0 to 5.5h<-1>. The catalyst has high adaptability on pyrolysis gasoline raw materials with different arsenic content, different sulphur content, water content and pectin content; the low-temperature activity of the catalyst is high.

The invention provides a hydroconversion method of deep cut anthracene oil. The method comprises the following steps of: fractionating deep cut anthracene oil into a light fraction and a heavy fraction, then separating the light fraction after hydrofining, refining the liquid phase which is obtained during the separating process to generate an oil, infusing the oil and the heavy fraction into the hydroconversion region and then separating the heavy fraction from the oil which is generated during the hydroconversion process, wherein the first fraction which is light is entered into the hydrocracking region, and the cracked product which is obtained during the hydrocracking process is infused into the fractionation system to obtain gasoline and diesel fractions. The hydroconversion method of deep cut anthracene oil provided by the invention has the advantages that the deep cut anthracene oil is inversed into light fuel oil by means of hydroconversion, an application way with high additional value is provided to coal tar, the operation of the device is stable by optimizing the process, and the running period of the device is long.