35results about How to "Maintain active stability" patented technology

The invention discloses a method and a reaction system for liquid phase cycling hydrotreatment. In the method, part of a liquid phase product after the hydrotreatment is mixed with fresh raw oil in a cycling mode to form a liquid phase material; hydrogen is mixed into the liquid phase material; the hydrogen mixed amount is 1 to 20 times that of the dissolved hydrogen which makes the reaction system saturated under a reaction condition; the liquid phase material mixed and dissolved with the hydrogen is put into a reactor; a hydrogenation catalyst bed is arranged in the reactor and is immersed in the liquid phase material; the upper part of the reactor is provided with a gas phase space; a pressure control system communicated with the gas phase space is arranged on the reactor and controls the pressure in the reactor by controlling the gas exhaust quantity; and the liquid phase material dissolved with the hydrogen is put into the hydrogenation catalyst bed of the reactor to perform hydrogenation reaction. Compared with the prior art, the method ensures that the liquid phase cycling hydrotreatment can be controlled and operated stably, and obtain an ideal reaction effect.

The invention relates to a method for removing olefins from reformate through liquid phase circulation selective hydrogenation. The method is characterized in that performing hydrogen saturation in a pipeline to form a raw material/hydrogenation product/hydrogen liquid phase mixture, and adding the liquid phase mixture to a multistage conventional hydrogenation reactor in sections under the hydrogenation condition; and entering a catalyst bed area in sections for reaction, wherein part of reaction products discharged from the bottom of the reactor circulate and are mixed with fresh raw materials, and part of reaction products discharged from the reaction system enter a follow-up separating device, the ratio of the circulation volume and the raw materials in the circulating liquid hydrogenation products is 1: (1-5): 1 by volume, the hydrogenation process conditions include that the reaction temperature is 80-180 DEG C, the pressure is 1.5-2.0MPa, and the fresh feed volume space velocity is 2.0-4.0hr-1.

The invention discloses a hydrotreating method of product circulation. One part of circulation of a hydrotreated liquid phase product is mixed with a raw material into a liquid phase material, and the liquid phase material enters the upper part of a reactor. The hydrotreating method of product circulation is characterized in that the upper part of the reactor is provided with at least one air-lift tray of which the lower part is introduced with hydrogen; the hydrogen and the liquid phase material contact on the air-lift tray for the air lift of hydrogen sulfide and ammonia in the liquid phase material; meanwhile, hydrogen is further dissolved in the liquid phase material; the air-lift liquid phase material enters a catalyst bed on the lower part of the reactor for hydrotreating reaction; and air-lift gas containing hydrogen sulfide and ammonia is discharged from the top of the reactor. The reactor adopted by the invention simultaneously has the action of catalytic hydrotreating reaction and the action on causing products H2S, NH3 and the like to be discharged out of a reaction system by air lift, thus greatly improving hydrotreating reaction efficiency and enhancing technology flexibility and raw material adaptability.

The invention provides a liquefied gas hydrogenating, olefin content decreasing and desulfurizing catalyst and a preparation method thereof. The catalyst comprises a carrier and activated substances, the carrier adopts F-modified Al2O3-TiO2 composite oxides, activated substances comprise molybdenum, nickel and cobalt, the molybdenum is a main component, and the nickel and the cobalt are auxiliary components. The preparation method of the catalyst comprises a process for preparing a modified Al2O3-TiO2 compound oxide carrier and a process for preparing the liquefied gas hydrogenating, olefin content decreasing and desulfurizing catalyst by a co-impregnation method. The liquefied gas hydrogenating, olefin content decreasing and desulfurizing catalyst has the advantages of double functions of resisting to sulfur-poisoning and hydrogenating, olefin content decreasing and desulfurizing of a traditional molybdenum catalyst, simultaneously, low-temperature and low-pressure activity is good, deeply hydrogenating saturability is high, and activity is stable.

The invention relates to uniform-sized konjak gulcomannan microspheres. The average particle size of the microspheres is less than 10 mu m; the content of the konjak gulcomannan in the microspheres is greater than 20% (w/w); the particle size is uniform; and the particle size distribution coefficient Span value is less than 0.9. The invention further provides a preparation method of the microspheres. According to the invention, the problems that the konjak gulcomannan microspheres of which the particle size is less than 10 mu m are hard to prepare by using the conventional method and the prepared microspheres are not uniform in particle size are solved.

The invention discloses a low-cost hydrogenation process method, which comprises the following steps of: mixing base oil with hydrogen; allowing the mixture to pass through a catalyst bed under the condition of a hydrogenation process; and mixing and recycling partial hydrotreating products without setting a hydrogen circulating system, wherein the using amount of the hydrogen is 1 to 10 times that of the hydrogen which is dissolved by a reaction system under the condition of adding a reaction condition based on the chemical hydrogen consumption during the reaction. The low-cost hydrogenation process method is a hydrogenation process of gas, liquid and solid phases with a low hydrogen-oil ratio; due to the low hydrogen-oil ratio, the hydrogen circulating system in the conventional hydrogenation process can be removed to greatly reduce the equipment investment and the operation cost; the reaction can be ensured to perform successfully by properly maintaining a little gas-phase hydrogen; and proper hydrotreating product circulation can ensure that the operation is stably performed for a long-time circle.

An alkaline solid adsorbent for deacidifying and refining the liquid esters of organic acid is prepared from the oxide and hydroxide of alkali-earth in IIA family and alumina through wetting, mixing, kneading, extruding to become strips, drying and high-temp calcining. It has high specific surface area, adsorptive volume and mechanical strength.

The invention provides a method for producing naphtha and clean gasoline by catalytic cracking diesel oil. The method comprises the following steps of mixing the catalytic cracking diesel oil and hydrogen gas; enabling the mixture to enter the middle part of a reverse sequence filling hydrocracking reactor-hydrofining reactor to be mixed with cracking products from the hydrocracking reactor; enabling the mixture to enter the hydrofining reactor to perform a hydrofining reaction so as to remove impurities such as sulfur and nitrogen; performing an olefin saturated reaction and arene hydrogenation saturation; performing cutting processing on products after the hydrofining; using distillate oil below 165 DEG C as a naphtha product to be used as a raw material for a catalytic reforming unit; using distillate oil being 165 to 205 DEG C as a clean gasoline conditioning ingredient; returning distillate oil being 205 to 320 DEG C into the top of the reverse sequence filling hydrocracking reactor-hydrofining reactor; performing hydrocracking and hydrofining reactions; returning distillate oil being higher than 320 DEG C into a catalytic cracking device for further cracking, or enabling the distillate oil being higher than 320 DEG C to enter other hydrogenation devices for processing treatment. The method has the advantages that high yield of naphtha products is taken as the goal; the clean gasoline can be produced at the same time.

The invention provides application of a triterpene compound and a Parkinson's disease treatment medicine. The application comprises blocking of mutual combination between autophagy skeleton protein Beclin1 and an autophagy inhibiting factor Bcl-2 so as to induce nerve cell autophagy, and preparation of a Parkinson's disease treatment medicine. The triterpene compound is any one or a mixture of two of maslinic acid and tormentic acid. The Parkinson's disease treatment medicine provided by the invention comprises a pharmaceutically acceptable auxiliary material as well as an effective dosage of any one or a mixture of two of the maslinic acid and the tormentic acid. The triterpene compounds, namely the maslinic acid and the tormentic acid, are capable of directly blocking mutual combination between the autophagy skeleton protein Beclin1 and the autophagy inhibiting factor Bcl-2, so that the triterpene compounds have the function of promoting autophagy in nerve cells, and have a nerve protection function on Parkinson's disease cells. Therefore, the maslinic acid and the tormentic acid can be directly adopted to prepare the Parkinson's disease treatment medicine, and the Parkinson's disease treatment medicine is endowed with good medicinal effect.

The invention relates to a preparation method and application of a Bi/Bi2SiO5 photocatalyst, belongs to the fields of controllable preparation of a Bi/Bi-based photocatalytic material composite system, CO2 reduction resource conversion and utilization and artificial photosynthesis, and solves the problems of narrow light response range of Bi2SiO5, high photoelectron-hole combination rate and the like. In the preparation method, Bi(NO3)3.5H2O and Na2SiO3.9H2O are respectively taken as a bismuth source and a silicon source, ethylene glycol and deionized water are taken as solvents, a NaOH solution is taken as a pH value regulator, a one-step hydrothermal method is utilized, the pH value of a reaction solution is adjusted to be 9-14 by regulating the concentration of the NaOH solution, and the high-purity Bi/Bi2SiO5 photocatalyst can be obtained. Finally, activity, selectivity and stability of Bi2SiO5 for photocatalytic reduction of CO2 are improved, and a new method and a new applicationare provided for preparation of a high-efficiency novel elemental Bi/Bi-based photocatalytic material composite system.

The invention belongs to the technical field of gaseous hydrocarbon conversion catalysts, and relates to a catalyst for the field of synthesis gas produced by gaseous hydrocarbon self-heating conversion or hydrogen production and a preparation method of the catalyst. According to the catalyst disclosed by the invention, nickel is used as an active component; SiO2 at free state and 3Al2O3*2SiO2 of a mullite structure are used as carriers; MgO and/or a rare earth metal oxide are used as auxiliaries. The preparation method comprises the following steps: adopting a pulping method or a dry mixing method to prepare a semi-finished product, and then molding and baking the semi-finished product to obtain the finished product catalyst. The catalyst is high in anti-carbon deposition performance, good in strength and strength stability, and good in reactive metal dispersion effect, effectively avoids the reactive metal crystal grain aggregation in the using process, ensures the activity stability of the catalyst, and facilitates large-scale industrial production.

The industrial white oil producing process includes the following steps: 1. catalytically dewaxing hydrocracked tail oil as material oil under the action of shape selecting catalyst; 2. fractioning in fractionating tower and leading out side oils of different viscosities from different side lines; and 3. feeding side oils to corresponding fixed bed reactors with hydrorefining reducing nickel metal catalyst to produce industrial white oils in corresponding grades via one section of hydrorefining. The present invention has reduced reaction temperature, reduced viscosity lowering of the hydrorefined material, capacity of reaching the saturated aromatic hydrocarbon level, flexible operation and high market adaptability.

The invention discloses a method for hydroprocessing a static bed. The method is characterized in that raw material oil is mixed with hydrogen to pass through a hydroprocessing region with a catalyst bed layer under hydroprocessing technique condition, wherein the hydroprocessing region comprises a single-stage or multi-stage internal cross-flow reactor, and a part of hydrogenation products are mixed with the raw material oil for recycling. By using the method, the volume of hydrogen oil is smaller, thereby the apparatus investment and operating cost are greatly reduced; the used internal cross-flow reactor simultaneously has functions of catalyzing the hydrogenation reaction and extracting gases of reaction by-products such as H2S, NH3 and the like from a reaction system, thereby greatlyimproving the efficiency of the hydrogenation reaction. The invention not only can be used for distillate of gas, coal, diesel fuel and the like for hydrodesulphurization, hydrodenitrogenation and hydrodearomatization to refine, but also for distillate such as VGO raw material moderating the hydrocracking to produce clean fuel.

The invention discloses a zero-additive composite nutritional fruit and vegetable lozenge and a preparation method thereof. The zero-additive composite nutritional fruit and vegetable lozenge comprises the following raw material components in parts by mass: 175-240 parts of orange juice, 35-40 parts of orange pulp and 20-30 parts of cooked potato pulp. The preparation method comprises the following steps: mixing the orange juice, the orange pulp and the cooked potato pulp, carrying out micronizing, vacuum freeze drying, crushing, and tabletting to obtain the product. The zero-additive composite nutritional fruit and vegetable lozenge does not contain any sweetening agent, excipient, preservative, pigment, essence and other food additives. The pure natural compound fruit and vegetable lozenge which is sweet, sour, palatable and delicate in taste is prepared by utilizing the complementarity and color similarity of the raw materials, and the lozenge has the characteristics of nutrition, health care and wide range of people suitable for eating.