51results about How to "Increase saturation rate" patented technology

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 hydro-cracking method for blending ethylene bottom oil, which is different from the method for processing the conventional ethylene bottom oil and comprises the following steps: blending an ethylene bottom oil light end into a conventional hydro-cracking raw material for hydro-cracking, in the presence of hydrogen, sequentially contacting the ethylene bottom oil light end with a hydro-guard catalyst, a hydro-refining catalyst, a hydro-residue carbon removing catalyst and a hydro-cracking catalyst; separating an effluent of hydro-cracking reaction to obtain light fueloil. The method of the invention adopts a method of grading the hydrogenation catalyst, can process the ethylene bottom oil light end and produce diesel oil having a high cetane number and a low condensation point and a naphtha having high arene, and is not obviously changed in a BMCI value of tail oil and a smoke point of a jet fuel when compared with the conditions before blending the ethylene bottom oil.

The invention relates to a method for selective hydrogenation of diesel oil. The method comprises that diesel oil raw material oil and hydrogen are mixed, the mixture contacts a hydrorefining catalystin a first reaction zone, and hydrodesulfurization, hydrodenitrogenation and selective hydrodearomatization are performed under hydrogenation process conditions; the reaction effluent of the first reaction zone is separated by a separator to obtain a reaction effluent I and reaction effluent II, the reaction effluent II enters a second reaction zone and contacts a hydrorefining catalyst, and hydrodesulfurization, hydrodenitrogenation and selective hydrodearomatization are further performed under hydrogenation process conditions to obtain a reaction effluent III; after the reaction effluent Iand the reaction effluent III are mixed, and separation is performed to obtain hydrogenation oil; and based on the diesel oil raw material oil, the saturation rate of the polycyclic aromatic hydrocarbon in the hydrogenation oil is more than 95%, and the selectivity of the monocyclic aromatic hydrocarbon is more than 85%. According to the present invention, with the method, the high-quality raw material is provided for the catalytic cracking or hydrocracking production of high-octane number gasoline or BTX components while the hydrogen consumption of the hydrogenation process is reduced, and the process economy is easily improved.

The invention discloses a method for processing ethylene tar, which selects an appropriate cutting point to fractionate the ethylene tar into a light fraction and a heavy fraction aiming at the characteristics of high content of arene, colloid and carbon residue in the ethylene tar. The light fraction passes through a hydrogenation protection reaction zone, a hydrofining reaction zone and a hydrocracking reaction zone sequentially to obtain a gasoline fraction and a diesel oil fraction; and the heavy fraction is used as a universal type carbon fiber asphalt stock. The method for processing the ethylene tar makes full use of the total fraction of the ethylene tar and increases the additional value of the ethylene tar. In addition, the method enables the arene after hydrostturation in the ethylene tar to open ring, crack moderately and / or isomerize by selecting two types of hydrocracking catalysts to perform grading loading so as to obtain the diesel oil fraction with condensation pointless than -40 DEG C in high yield and obtain a side product high-octane gasoline fraction at the same time.

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 discloses a method for processing ethylene tar. Aiming at the characteristic of high contents of colloid, asphaltene and carbon residue in the ethylene tar, the method comprises the following steps of: performing fractional distillation on the ethylene tar to obtain light and heavy fractions, and treating heavy fractions by adopting a solvent deasphalting method to obtain deasphalted oil and deoiled asphalt; and mixing the deasphalted oil, the light fraction of the ethylene oil and hot low-grade oil, and making the mixture pass through a hydrogenation protecting reaction area, a hydrogenation refining reaction area and a hydrocracking reaction area in turn to obtain hydrocracking crude oil, wherein partial hydrocracking crude oil is circulated and mixed with the deasphalted oil and the light fraction of the ethylene tar to enter the hydrogenation reaction areas, the rest hydrocracking crude oil is separated to form gasoline and diesel fractions, and the deoiled asphalt serves as a general carbon fiber asphalt material. By the method, the problem of high temperature rise of a hydrogenation reactor bed can be effectively solved, full fractions of the ethylene tar are fully utilized, and the added value of the ethylene tar is improved.

The invention discloses a method for producing high-quality gasoline and diesel by catalyzing diesel oil. Oil and circulating hydrogen are mixed into II hydrofining reaction zone for reaction, and the reaction temperature is 30~120°C higher than I hydrofining reaction zone; (3) The resulting oil obtained in step (2) is cut into light components and heavy components; (4) The light components obtained in step (3) are mixed with circulating hydrogen into the hydroreforming reaction zone, and the resulting oil is separated to obtain gasoline fractions and diesel fractions; (5) The heavy components obtained in step (3) are mixed with circulating hydrogen Entering the hydroconversion reaction zone, the generated oil passes through the separation system to obtain gas, gasoline, and diesel fractions. (6) The gasoline obtained in step (4) is mixed with the gasoline obtained in step (5) to obtain a qualified gasoline product. Step ( The diesel oil obtained in 4) is mixed with the diesel oil obtained in step (5) to obtain a qualified diesel product. The method can produce high-quality fuel oil products, and at the same time, compared with other technologies, it has the characteristics of low chemical hydrogen consumption and flexible adjustment of product structure.

The invention discloses a hydrocracking method for blending ethylene tar, which comprises the following steps of: blending light fraction of ethylene tar into heavy distillate for hydrocracking, and contacting a hydrogenation protecting catalyst, a hydrogenation refining catalyst, a hydrogenation carbon residue removing catalyst and a hydrocracking catalyst in the presence of hydrogen to obtain hydrocracking crude oil, wherein partial hydrocracking crude oil is circulated and mixed with the light fraction and heavy distillate of the ethylene tar to enter a hydrocracking area, and the rest hydrocracking crude oil is future separated to obtain light fuel oil. By the method, the problem of high temperature rise of a hydrogenation reactor bed can be effectively solved; meanwhile, a method of grading the hydrogenation catalysts, the light fraction of the ethylene tar can be processed, and diesel with high cetane number and low condensation point and naphtha with high potential aromatic content can be produced; and compared with a state that the ethylene tar is not blended, the method has the advantage that the bureau of mines correlation index (BMCI) value of tail oil and the smoke point of jet fuel are not obviously changed.