53results about How to "Improve hydrogenation reaction performance" patented technology

The process of treating hydrogenation catalyst before application includes making the hydrogenation catalyst in oxide state to support organic acid and/or organic nitrogen compound, organic solvent and element sulfur and treating in dynamic heating equipment. The hydrogenation catalyst with supported sulfur containing matter, such as element sulfur, has raised sulfur containing matter utilization rate, smooth temperature raising in the catalyst bed, raised catalyst activity and other features. The method of the present invention may be applied for various kinds of hydrogenation catalyst.

The present invention relates preparation process of vulcanized catalyst. During the preparation process, thiram in 0.5-25 wt% of the catalyst, sulfur element in 30-150 % of the theoretic sulfur demand of the catalyst and organic solvent in 0.1-50 wt% of the catalyst are first introduced into the catalyst in oxide state, and the catalyst is then heat treated in dynamic heating apparatus. The catalyst has raised sulfur holding rate, smooth heat release, shortened vulcanizing period and raised production efficiency. The method of the present invention may be used in the treatment of various kinds of hydrogenating catalyst before application.

A process for treating the hydrocatalyst before it is used features that the organic solvent and sulfur-contained substance are introduced to the oxidation-state hydrocatalyst for higher activity.

The invention discloses a shale oil one-stage in series hydrofining technological method, which comprises the following step: shale oil raw material and hydrogen firstly exchange heat with thermal media to 200-280 DEG C, and pass through a first reactor by the volume per hour of 0.5h-1 to 4.0h-1, and high-voidage hydrofining catalysts are arranged in the first reactor; and materials flowing out of the first reactor directly pass through a second reactor by the volume per hour of 0.3h-1 to 1.0h-1 after being heated by a heating furnace, the average reaction temperature in the second reactor is 360-420 DEG C, and conventional hydrofining catalysts are arranged in the second reactor. With the method disclosed by the invention, the hydrogenation reaction effect is improved under the condition of ensuring the long-term stable operation of a shale oil hydrogenation device.

The invention relates to a processing method before the application of hydrogenation catalyst, comprising the detailed process as follows: organic solvent, elemental sulfur and water are introduced in oxidated hydrogenation catalyst; subsequently, heating predisposal is carried out under a certain condition. The processing method before the application of the hydrogenation catalyst loads the sulfur-contained substance such as the elemental sulfur to the hydrogenation catalyst; a certain interaction is generated and little heat is discharged; and the water vapor which is generated during the heat disposal process of the added water adjusts the interaction of the sulfur and the catalyst and reduces the heat discharging degree during the heat disposal process. Compared with the prior art, the catalyst obtained by the method has the advantages of high utilization ratio of the sulfur-contained matter, gradual increment of the temperature of the catalyst bed and high activity of the catalyst when the activation is applied. The method can be used for processing before the application of various hydrogenation catalysts.

The invention discloses a process of hydrogenation of heavy oil feedstock, especially the process of hydrogenation of heavy oil feedstock using combination of boiling bed and fixed bed technologies. The process comprises the following steps: mixing heavy oil feedstock and the product obtained from the fixed bed hydrogenation; adding the mixture into boiling bed hydrogenation reactor, separating the materials obtained from boiling bed hydrogenation into to hydrogen-rich gas and liquid; recycling the hydrogen-rich gas; loading the liquid into the fractionate tower and for fractioning to obtain lightweight product and tail oil; mixing the tail oil and hydrogen, and adding the mixture into the fixed bed hydrogenation reactor; and adding all the materials obtained from fixed bed hydrogenation into the boiling bed hydrogenation reactor. Compared with existing technology, the method of the invention effectively combines the boiling bed and the fixed bed hydrogenation technology characteristics, allows the product obtained from fixed bed hydrogenation directly to enter the boiling bed reactor, thereby improves the flow state of the boiling bed feed, and enhances heat and mass transfer effects among gas, liquid and solid. Simultaneously, product properties are obviously improved after the tail oil obtained from the boiling bed hydrogenation is hydrogenated by the fixed bed. Employing the operation mode of the heavy oil hydrogenation can improve the product quality significantly and increase yield of the light oil obviously.

The present invention relates to hydrocarbon hydrotreating process including the steps of loading catalyst into the reactor, activating, reaction, etc. The hydrotreating catalyst contains organic nitrogen compound in 0.5-20 wt% of the catalyst, simple substance sulfur in the amount of 30-150 % of the theoretical sulfur demand of the catalyst, and organic solvent in 0.1-50 wt% of the catalyst. The hydrotreating catalyst with the common action of organic nitrogen compound, sulfur and organic solvent has high sulfur holding rate in activation, less concentrated heat release, lowered temperature rise in the catalyst bed and high activity. It may be applied in various kinds of hydrocarbon hydrotreating process.

The invention relates to the technical field of boiling beds, in particular to a boiling bed reactor. The boiling bed reactor comprises a reactor cylinder, a three-phase separator is arranged at the upper side inside the reactor cylinder, a gas-liquid distributor is arranged at the lower side inside the reactor cylinder and comprises a material distributing pipe, an upper tray and a lower tray, the upper tray and the lower tray form a dual-layer tray structure, gaps are formed by the upper tray and the lower tray, the material distributing pipe penetrates through the upper tray and the lower tray, a hood is arranged at an upper end opening of the material distributing pipe, a pipe wall opened hole is formed in the portion, between the upper tray and the lower tray, of the material distributing pipe, and a circulating oil reactor inlet is further formed between the upper tray and the lower tray. By means of the boiling bed reactor, a solid catalyst which is separated from the three-phase separator is settled in the radial center area of the reactor and flows back into the reactor, the problem that when the three-phase separator is filled with a large dosage of catalyst, the settlingand backflow resistance of the catalyst is large is solved, and it is guaranteed that the three-phase separator still has a good separating effect when filled with a large dosage of catalyst.

The invention relates to the field of experimental equipment, in particular to a laboratory catalytic hydrogenation device which comprises a shell, a rotating groove is formed in the top of the shell, a rotating rod is slidably connected into the rotating groove, the bottom of the rotating rod is inserted into a base in the shell, a guide column is arranged on the upper portion of the rotating rod, and a guide groove is formed in the periphery of the guide column; a gear box is arranged on the left side of the guide column, a driving bevel gear is arranged in the gear box, and a hand wheel is connected to the top of the driving bevel gear and arranged on the top outside the shell; the right side of the driven bevel gear is connected with a threaded rod, the threaded rod is in threaded connection with a transmission block, the right side of the transmission block penetrates out of the gearbox, and the right end of the transmission block is connected with a guide piece. And a plurality of filling assemblies are arranged on the rotating rod. Therefore, the catalyst and reactants can be uniformly mixed, the hydrogenation reaction effect is improved, after the reaction is completed, the catalyst is quickly replaced, and the time is saved.

The invention provides a catalytic system for hydrogenation of carbon dioxide and a method for synthesizing n-butanol. The catalytic system comprises a compound containing transition metal elements, an organic ligand and an iodide cocatalyst. Compared with a single catalyst, the homogeneous catalytic system provided by the invention greatly improves reaction efficiency through a synergistic effectof the compound containing transition metal elements, the organic ligand and the iodide cocatalyst, can improve effect of hydrogenation of carbon dioxide, particularly the effect of preparing n-butanol by hydrogenation of carbon dioxide, has the advantages of low cost and readily available raw materials, can directly utilize carbon dioxide, has important significance for recycling carbon resources, and particularly provides an economical and feasible method for synthesizing n-butanol.

The invention provides a preparation system and method of polyglycolic acid. The preparation system comprises a hydrogenation reactor, a hydrogen feeding pipeline, a hydrolysis reactor and a water vapor feeding pipeline, wherein an oxalate feeding pipeline is arranged on the side wall of the hydrogenation reactor, a micro-interface unit is arranged in the hydrogenation reactor, and the micro-interface unit is formed by sequentially arranging a plurality of micro-interface generators from top to bottom; and the hydrogen feeding pipeline penetrates through the side wall of the hydrogenation reactor and enters the micro-interface unit, so that hydrogen is crushed into micron-sized micro-bubbles in the micro-interface unit in advance before hydrogenation reaction. According to the preparationsystem disclosed by the invention, the micro-interface unit is arranged in the hydrogenation reactor, and the micro-interface generators are arranged in the hydrolysis reactor, so that hydrogen is crushed into micro-bubbles before hydrogenation reaction of hydrogen and dimethyl oxalate, and the phase boundary mass transfer area between hydrogen and dimethyl oxalate is increased; and meanwhile, thephase boundary mass transfer area in the hydrolysis reaction process is increased.

The invention belongs to the technical field of hydrogenation, and particularly relates to a boiling bed hydrogenation reaction system and a boiling bed hydrogenation process method. On one hand, theproblem of coking of parts of pipelines caused by intermittent operation of a catalyst discharge system can be effectively solved. On the other hand, the use ratio of a reactor can be further increased (namely, reserve of catalysts in the reactor is improved), hydrogenation reaction effects are further improved, operating stability of the system is improved, and particularly, stable boiling stateof the catalysts can be maintained in start, in stop and under unusual service conditions.

The present invention relates to hydrocarbon hydrotreating process including the steps of loading catalyst into the reactor, activating, reaction, etc. The hydrotreating catalyst contains thiourea compound in 0.5-20 wt% of the catalyst, simple substance sulfur in the amount of 30-150 % of the theoretical sulfur demand of the catalyst, and organic solvent in 0.1-50 wt% of the catalyst. The hydrotreating catalyst with the common action of thiourea compound, sulfur and organic solvent has high sulfur holding rate in activation, less concentrated heat release, lowered temperature rise in the catalyst bed and high activity. It may be applied in various kinds of hydrocarbon hydrotreating process.