82results about How to "Increase hydrogen partial pressure" patented technology

The invention relates to a process for producing high-quality hydrocarbon base oil particularly of biological origin. The process of the invention comprises aldol condensation, hydrodeoxygenation, and isomerization steps. Aldehydes and/or ketones, preferably of biological origin are used as the feedstock.

The invention discloses a hydrogenation method of a heavy hydrocarbon multi-segment fluidized bed. The technical process comprises the steps of: mixing thick heavy hydrocarbon raw materials with gas phase material flow which is discharged from a fluidized bed hydrogenation-desulfuration reactor and a hydrogenation-denitrification reactor to enter into a hydrogenation-demetalization reactor; cooling and purifying reacted gas phase material flow to be taken as recycle hydrogen; mixing the demetallized liquid phase material flow with hydrogen to enter into the fluidized bed hydrogenation-desulfuration reactor; mixing the desulfurated liquid phase material flow with hydrogen to enter into the hydrogenation-desulfuration reactor; and leading the denitrified liquid phase material flow to enter into a separating device. The technology adopts a new reactor assembly mode to machine heavy oil raw materials with high viscosity and bad quality, can provide a new flexible, high-efficiency and energy-saving operation mode, organically combines the performances of the raw materials with the characteristic of each hydrogenation reaction, makes full use of reaction heating on the premise that a device is guaranteed to be stably operated, provides a product with good quality, and can flexibly adjust the operation process according to the requirement of a refinery.

The present invention generally relates to vacuum pressure swing adsorption (VPSA) processes and apparatus to recover carbon dioxide having a purity of approximately ≧90 mole % from streams containing at least carbon dioxide and hydrogen (e.g., syngas). The feed to the CO₂ VPSA unit can be at super ambient pressure. The CO₂ VPSA unit produces three streams, a H₂-enriched stream, a H₂-depleted stream and a CO₂ product stream. When the CO₂ VPSA unit is installed between an SMR/shift reactor and a H₂ PSA unit, hydrogen recovery is expected to be increased by extracting CO₂, thereby increasing hydrogen partial pressure in the H₂ PSA feed. The recovered CO₂ can be further upgraded, sequestered or used in applications such as enhanced oil recovery (EOR).

The present invention discloses a hydrogenation method for producing lubricating oil base oil through poor-quality heavy distillate oil. According to the method, poor-quality heavy distillate oil and hydrogen gas enter a first-stage reaction zone to carry out a hydrorefining reaction, the reaction effluent is separated, the obtained liquid enters a second-stage reaction zone to carry out a hydrorefining reaction, the second-stage reaction effluent enters a third-stage reaction zone to carry out a hydrocracking reaction, the hydrocracking effluent is separated, and at least part of the tail oil and new hydrogen are mixed and then are subjected to an isomerizing dewaxing and finishing reaction to obtain various lubricating oil base oils. With the method of the present invention, the nitrogen-containing impurities in the poor-quality raw material can be subjected to hydrotreating under the relatively mild condition so as to make the poor-quality raw material meet the hydrocracking feeding requirement, such that the lubricating oil base oil raw material source is broadened; and the hydrorefining temperature is substantially reduced so as to increase the operation period of the device and process the poor-quality raw material, or increase the processing capacity of the device in the same operation period.

The invention discloses a two-stage hydrocracking method used for producing high-quality chemical raw materials. The two-stage hydrocracking method comprises following steps: (1) raw material oil is mixed with hydrogen, and an obtained mixture is subjected to hydrofinishing reaction; (2) a refining reaction product is subjected to gas-liquid separation; (3) an obtained liquid product and hydrogen are subjected to hydrocracking reaction, and are contacted with a catalyst I and a catalyst II successively, wherein molecular sieve content of the catalyst I and molecular sieve content of the catalyst II are different; and (4) a hydrocracking effluent is subjected to separation and fractionation so as to obtain a plurality of hydrocracking products. The molecular sieve content of the hydrocracking catalyst I is higher, acid center of the hydrocracking catalyst I matches hydrogenation center, and the hydrocracking catalyst I possesses excellent heavy naphtha selectivity; and the catalyst II possesses excellent aromatic hydrocarbon transformative capacity, and is capable of transforming aromatic hydrocarbons in heavier components of the raw material oil into smaller molecules so as to distribute in heavy petroleum fractions. The two hydrocracking catalysts with different molecular sieve contents are combined, so that aromatic hydrocarbon potential content of heavy naphtha is increased, and tail oil BMCI value is reduced.

The invention discloses a hydrocracking method used for producing high-quality jet fuel from inferior raw materials. The hydrocracking method comprises following steps: (1) inferior raw material oil is subjected to hydrofinishing reaction; (2) a hydrofinishing effluent is subjected to gas-liquid separation, and an obtained liquid material is subjected to fractionation; (3) tail oil obtained via fractionation is subjected to hydrocracking reaction, wherein a hydrocracking reaction zone comprises a hydrocracking catalyst I and a hydrocracking catalyst II with different molecular sieve contents; and (4) a hydrocracking effluent is subjected to separation, and an obtained liquid product is subjected to fractionation so as to obtain corresponding products. The upper part of the hydrocracking reaction zone is filled with the hydrocracking catalyst I; the hydrocracking catalyst I possesses relatively high aromatic hydrocarbon transformative capacity, and is capable of transforming aromatic hydrocarbons in heavier components of the raw materials into smaller molecules, and distributing the smaller molecules into heavy petroleum and jet fuel fractions; the lower part of the hydrocracking reaction zone is filled with the hydrocracking catalyst II; and the hydrocracking catalyst II possesses relatively high hydrocarbon alkyl cracking capacity. The two catalysts are combined, so thathydrocracking product quality is improved obviously, and especially, smoke point of jet fuel fractions is increased.

The invention provides a coal liquefaction method and device. The coal liquefaction method comprises the steps as follows: first liquefaction reaction is carried out on coal slurry and hydrogen to obtain a first liquefied product, wherein the first liquefied product comprises a first gas mixture and a first heavy product and the first gas mixture comprises a first liquefied light oil and a first gas product; a first heavy product in the first liquefied product is separated and second liquefaction reaction is carried out on the first heavy product and the hydrogen to obtain a second liquefied product; and before or during the second liquefaction reaction, the method also comprises the step of adding a first hydrogenation catalyst to the first heavy product. Through the method and the device provided by the invention, the conversion rate and the oil yield of coal can be improved, and meanwhile, the hydrogen consumption and the gas yield are reduced.

The present invention discloses a process method for producing lubricating oil base oil through a poor-quality raw material. According to the process method of the present invention, a poor-quality raw material firstly enters a first-stage reaction zone to carry out a hydrorefining reaction, a co-current flow process and a counter flow process are concurrently adopted in the first stage, the generated oil obtained in the first stage enters a second-stage reaction zone to carry out a deep hydrogenation reaction, and the second-stage reaction effluent is subjected to hydrocracking; and the cracking tail oils are subjected to cutting pre-fractionation to obtain the suitable tail oil distillate, and the suitable tail oil distillate is subjected to an isomerizing dewaxing and finishing reaction to obtain the lubricating oil base oil distillate. With the method of the present invention, the nitrogen-containing impurities in the poor-quality raw material can be subjected to hydrotreating under the relatively mild condition so as to make the poor-quality raw material meet the hydrocracking feeding requirement, such that the lubricating oil base oil raw material source is broadened; and the operation period of the device can be increased and the poor-quality raw material can be processed, or the processing capacity of the device can be increased in the same operation period.

The invention relates to a method for directly liquefying coal, which comprises the following steps: coal slurry, hydrogen gas and a catalyst enter a first reaction region, and the mixture stream flows upwards in the first reaction region and reacts under the direct liquefying condition of slurry bed coal; after flowing out of the first reaction region, the mixture stream is subjected to gas-liquid separation into a gas-phase stream and a liquid-phase stream; the liquid-phase stream enters a second reaction region and flows downwards, performs countercurrent contact with the upward-flowing hydrogen gas in the second reaction region, and reacts under the direct liquefying condition of slurry bed coal; and the liquid-phase stream flowing out of the second reaction region partially or completely enters a separation system to perform separation. The method can lower the gas separation rate in the reactor and further enhance the direct liquefying effect of coal.

The invention discloses a semi-regenerative catalytic reforming method, comprising the following steps: starting a compressor to carry out gas circulation, feeding naphtha to a semi-regenerative reforming reactor, heating to 400-550 DEG C, and reacting under 0.2-3.0MPa; introducing high-purity hydrogen at the inlet of the compressor, and mixing with reforming cycle hydrogen, wherein the volume flow per hour of the introduced high-purity hydrogen is 10-1000 times volume of the catalyst. The method is low in operation cost and simple and convenient to operate; carbon deposit of a catalyst in the reaction process can be reduced; and the service life of the catalyst is prolonged.

The invention discloses a diesel hydrogenation process method. The upper part in a hydrofining reactor is provided with a first reaction zone, and the lower part in the hydrofining reactor is provided with a second reaction zone; a liquid collecting and discharging part is arranged between the two reaction zones and is used for collecting liquid of reaction effluent in the first reaction zone and discharging the liquid out of the reactor; a gas phase of the reaction effluent in the first reaction zone enters the second reaction zone through a bubble cap of the liquid collecting and discharging part; a diesel raw material enters the second reaction zone and is mixed with the gas phase inflowing from the first reaction zone to be subjected to hydrofining reaction under the hydrofining condition; reaction effluent in the second reaction zone is subjected to gas-liquid separation to form a gas phase; the gas phase from which hydrogen sulfide is removed is mixed with a liquid phase to enter the first reaction zone so as to be subjected to hydrogenation reaction; and the hydrogenated product is obtained after the liquid phase of the reaction effluent in the first reaction zone is discharged by the liquid collecting and discharging part. Compared with the prior art, the method has the advantages that: reaction heat is fully utilized; a large amount of cold hydrogen is not needed; meanwhile, the reaction environments of different reaction zones are optimized, and the whole reaction performance is improved.

The invention relates to a method for producing a low freezing point diesel oil by coked gasoline and diesel oil, which is characterized in that coked gasoline and diesel oil is contacted in a first reaction zone with a Hydrobon catalyst I for reaction, an effluent is performed with flash evaporation in a hot high-pressure separator, the obtained liquid phase material flow is introduced in a second reaction zone and is contacted with a hydrogenation modified pour point depression catalyst for a hydrogenation modified pour point depression reaction, a reaction effluent is mixed with the gas phase material flow obtained in the hot high-pressure separator and is introduced in a separating system and a fractionation system, and the gas, a naphtha fraction and a low freezing point diesel oil fraction can be separated. According to the invention, the optimal hydrogenation modified heterogeneous pour point depression reaction is employed, the freezing point of the diesel oil fraction can be obviously reduced, and the high product diesel oil fraction yield can be simultaneously kept. The method can directly produce the number -10--35 low freezing point diesel oil, the sulfur content, nitrogen content and aromatic hydrocarbons content of the product can be reduced, and the cetane number is increased.

The invention belongs to the technical field of coalification industry and particularly relates to an anthracene oil hydrogenation method. The anthracene oil hydrogenation method comprises the following steps that after anthracene oil hydrofining, separation is performed through a hot high-pressure separator, a liquid-phase product enters a hot low-pressure separator, and hot low-fraction oil is partially circulated to a hydrofining reactor; the residual hot low-fraction oil enters a hydrocracking reactor to obtain a hydrocracking product, the hydrocracking product and gas separated from the hot high-pressure separator enter a cold high-pressure separator, the liquid separated from the hot high-pressure separator and gas separated from the hot low-pressure separator enter a cold low-pressure separator for further gas-liquid separation, cold low-fraction oil separated from the cold low-pressure separator is partially circulated to the hydrofining reactor; fractionation is conducted on the residual cold low-fraction oil to obtain various products and tail oil. The method is small in temperature rise at a refining stage and stable in operation, can not only used for production of light gasoline and diesel products through anthracene oil hydrogenation, makes the devices safe and stable in operation and prolongs the operating cycle of the devices.

The invention discloses an ultra-deep desulfurization and dearomatization method for diesel oil. The method comprises the following steps that under a hydrogenation reaction condition, raw oil sequentially passes through a region I, a region II, a region III and a region IV filled with a hydrogenation catalyst in a reactor from top to bottom, and is subjected to a hydrogenation reaction with the catalyst in each region and hydrogen from bottom to top, and a hydrogenation reaction product flows out from the bottom of the reactor, wherein the reaction temperatures of the region I, the region IIand the region III are gradually increased, and the reaction temperature of the region IV is 51-100 DEG C lower than the reaction temperature of the region III. According to the method, different catalysts are reasonably graded, process parameters corresponding to the catalysts are adjusted, and the method is used for the hydrogenation reaction of diesel oil and can meet the requirements for producing low-sulfur and low-aromatic hydrocarbon diesel oil.