39results about How to "Improved deposition distribution" patented technology

The invention discloses a treatment method of residual oil, which comprises a solvent deasphalting device, a hydrogenation pretreatment reaction area, a hydrogenation treatment reaction area and a catalytic cracking reaction area. The method comprises the following steps that the raw residual oil is fractionated to obtain a light fraction and a heavy fraction; the heavy fraction is treated in the solvent deasphalting device to obtain deasphalted oil and deoiled asphalt; the light fraction, the deasphalted oil and hydrogen are mixed and then sequentially pass through the hydrogenation pretreatment reaction area and the hydrogenation treatment reaction area which are connected in series; gas-liquid separation is performed on a reaction effluent of the hydrogenation treatment reaction area; a gas phase cycles back to the hydrogenation pretreatment reaction area and / or the hydrogenation treatment reaction area; a liquid phase directly enters the catalytic cracking reaction area to perform a catalytic cracking reaction; and a catalytic cracking reaction effluent is separated to obtain dry gas, liquefied gas, a catalytic cracking gasoline fraction, a catalytic cracking diesel fraction, catalytic cracking heavy cycle oil and catalytic cracking slurry oil. The method can prolong a stable operation period of a device.

The invention discloses a combined process for conversion of residual oil. The combined process comprises the following steps: (1) allowing a residual oil raw material to enter into a solvent deasphalting unit so as to obtain deasphalted oil and de-oiled asphalt; (2) mixing the de-oiled asphalt obtained in step (1) with heavy distillate oil of a catalytic cracking unit and allowing an obtained mixture to enter into a fluidized bed hydrotreatment unit for fluidized bed hydrotreatment; (3) mixing an effluent of fluidized bed hydrotreatment obtained in the step (2) with the deasphalted oil and carrying out fixed bed hydrotreatment, wherein generated oil of an effluent of fixed bed hydrotreatment is used as a raw material for the catalytic cracking unit; and (4) mixing the de-oiled asphalt with a catalytic heavy fraction obtained after dry gas, liquefied gas and catalytic gasoline are separated from an effluent of a catalytic cracking reaction and subjecting an obtained mixture to fluidized bed hydrotreatment. Compared with the prior art, the combined process provided by the invention has the advantages of wide sources of the raw materials, low equipment investment, stable operation, a long operation period and a good synergistic and coordination effect.

The invention discloses a method for treating residual oil with hydrogenation treatment and catalytic cracking processes. A hydrogenation pretreatment reaction zone, a hydrogenation treatment reaction zone and a catalytic cracking reaction zone are contained; the method comprises steps as follows: a residual oil material and hydrogen are mixed and sequentially pass the hydrogenation pretreatment reaction zone and the hydrogenation treatment reaction zone which are connected in series; a reaction effluent in the hydrogenation treatment reaction zone is subjected to gas-liquid separation, a gas phase is recycled back to the hydrogenation pretreatment reaction zone and / or the hydrogenation treatment reaction zone, a liquid phase directly enters the catalytic cracking reaction zone for a catalytic cracking reaction, a catalytic cracking effluent is separated, and dry gas, liquefied gas, catalytic cracking gasoline fractions, catalytic cracking diesel fractions, catalytic cracking heavy cycle oil and catalytic cracking oil slurry are obtained, wherein parts of or all of catalytic cracking diesel and catalytic cracking oil slurry are recycled back to the hydrogenation treatment reaction zone for a hydrogenation treatment reaction. By means of the method, the stable operation cycle of a device can be prolonged.

The invention discloses a residual oil hydrogenation treatment and catalytic cracking combined method, which comprises the following components: performing the hydrogenation treatment reaction of a residual oil raw material in the presence of hydrogen and a hydrogenation catalyst, separating product of the reaction to obtain a gas, hydrogenated naphtha, hydrogenated diesel and hydrogenated tail oil, wherein the gas is circularly used in a hydrogenation reaction, the hydrogenated naphtha and hydrogenated tail oil enter a catalytic cracking device to undergo a catalytic cracking reaction in the presence of a cracking catalyst; and separating the product of the reaction to obtain a dry gas, a liquefied gas, a gasoline fraction and a catalytic cracking heavy fraction, wherein the catalytic cracking heavy fraction is filtered to remove solid impurity and circulated to a hydrogenation treatment device. When the method is used, the quality of produced naphtha and diesel product can be improved; and particularly, the sulfur content in naphtha and diesel is lowered and the cetane number of diesel is improved.

The invention discloses a process for treating inferior oil, the process includes a hydropretreating reaction zone, a hydrotreating reaction zone and a catalytic cracking reaction zone; the process includes the following contents: a residual oil raw material and hydrogen are mixed, and in turn pass through the hydropretreating reaction zone and the hydrotreating reaction zone which are in series connection, after gas-liquid separation of a hydrotreating reaction zone reaction effluent, a gas phase is recycled back to the hydropretreating reaction zone and / or the hydrotreating reaction zone, a liquid phase directly enters the catalytic cracking reaction zone for catalytic cracking reaction, a catalytic cracking reaction effluent is separated to obtain a dry gas, liquefied gas, a catalytic cracking gasoline fraction, a catalytic cracking diesel oil fraction, catalytic cracking heavy cycle oil and catalytic cracking oil slurry, and the catalytic cracking diesel and the catalytic cracking heavy cycle oil are partially or totally recycled back to the hydrotreating reaction zone for hydrotreating reaction. The method can prolong the stable operation period of a device.

The invention discloses a residual oil hydrogenation treatment and catalytic cracking combined processing method, which comprises: performing the hydrogenation reaction of a residual oil raw material in the presence of hydrogen and a hydrogenation treatment catalyst, and performing gas-liquid separation of efflux of hydrogenation reaction, wherein a gas phase is circularly used in a hydrogenation reaction, and a liquid phase is fractioned to form a light component and a heavy component; allowing a light component to enter a reactor from the bottom of a catalytic cracking riser reactor, allowing a heavy component to enter the reactor as secondary feed of the catalytic cracking riser reactor and performing a catalytic cracking reaction; and separating a dry gas, a liquefied gas and a gasoline fraction from efflux of a catalytic cracking reaction, wherein the fractions of diesel are not separated and enter a residual oil hydrogenation device after filtration. Compared with the prior art, the method can produce high-octane number gasoline and high-added-value liquefied gas to a maximum degree; meanwhile, the method can fully utilizes reaction heat and reduces production energy consumption.

The present invention discloses a residual oil hydrogenation treatment and catalytic cracking combination method. According to the method, the residual oil hydrogenation treatment process comprises two hydrogenation protection reactors, wherein the two hydrogenation protection reactors are arranged in parallel connection, the feed material of the first hydrogenation protection reactor is the residual oil raw material, and the feed material of the second hydrogenation protection reactor is the catalytic cracking heavy fraction; the effluents of the two reactors are mixed, and the resulting mixture enters a hydrogenation treatment reaction zone to carry out a hydrogenation reaction; the effluent of the hydrogenation reaction is subjected to gas-liquid separation, wherein the resulting gas phase is circularly adopted for the hydrogenation reaction, and the liquid phase directly enters a catalytic cracking apparatus without fractionation; the effluent of the catalytic cracking reaction is separated to obtain dry gas, liquefied gas, catalytic cracking gasoline, and catalytic cracking heavy fraction after catalytic cracking of the gasoline, wherein the catalytic cracking heavy fraction is adopted as the feed material of the second hydrogenation protection reactor. With the method, the operating period of the residual oil hydrogenation apparatus can be prolonged, the maximum amount of the catalytic cracking gasoline can be produced, and the equipment investment can be saved.

The invention discloses a method for treating inferior residual oil with a combined process. After the heavy oil raw material is saturated with hydrogen, it first passes through the hydrogenation pretreatment zone for hydrodemetallization and partial desulfurization; the reaction effluent is saturated with hydrogen again and then enters the hydrotreatment reaction zone for hydrodesulfurization and hydrodenitrogenation Reaction; wherein the reaction temperature in the hydrogenation pretreatment reaction zone is higher than the reaction temperature in the hydrotreatment reaction zone. In the method of the present invention, the hydrogenation pretreatment reaction zone reacts at a higher temperature, which can remove most of the metal impurities in the material, so that the desulfurization catalyst and / or denitrogenation catalyst in the hydrogenation treatment reaction zone are deactivated The reason has changed from the previous metal deposition and carbon deposition deactivation to only carbon deposition deactivation, so that the desulfurization catalyst and denitrogenation catalyst can be regenerated after one cycle of use, prolonging the operation cycle of the hydrogenation unit, thereby increasing the capacity of the unit. The operating efficiency improves the economy.

The invention discloses a method for treating residual oil by a combined process. After the inferior feedstock oil is mixed with hydrogen, it first passes through the hydrotreating pretreatment zone; the reaction effluent and the catalytic cracking circulating oil enter the hydrotreating reaction zone to separate the reaction effluent to obtain the hydrogenated residue oil for catalytic cracking reaction to obtain the circulating oil And / or the oil slurry is circulated to the hydrotreatment reaction zone; wherein the reaction temperature t1 of the hydrotreatment reaction zone is higher than the reaction temperature t2 of the hydrotreatment reaction zone. The method of the invention can improve the utilization rate of the hydrotreating main catalyst, prolong the operation period of the combined device, and increase the operation efficiency of the device.

The invention discloses a method for the hydrogenation and catalytic cracking of residual oil. In the method, the hydrogenation of a residual oil raw material is performed in the presence of hydrogen and a hydrogenation catalyst; the effluent of the hydrogenation is subjected to gas-liquid separation; a gas phase is circularly used for hydrogenation; a liquid phase directly enters a catalytic cracking device without fractionation; and dry gases, liquefied gases and the catalytic cracking heavy fraction obtained after the catalytic cracking of gasoline are separated from the effluent of the catalytic cracking reaction and mixed with a hydrogenating raw material to undergo hydrogenation. Compared with the prior art, the method can produce gasoline with a maximum yield and can save equipment investment, make full use of reaction heat energy and reduce production energy consumption at the same time.