195results about How to "Extended regeneration cycle" patented technology

The invention discloses a hydrofining catalyst and a preparation method thereof, belonging to the field of catalysts used in the petroleum-chemical industry. The hydrofining catalyst disclosed herein comprises a carrier, an active component and an auxiliary agent, wherein the carrier is Ti-modified gamma-alumina, the active component comprises oxides of Mo, Co and Ni, and the auxiliary agent comprises oxides of rare earth. The catalyst is characterized in that: based on 100% of the total weight of the catalyst, Co (measured in CaO) in the active component accounts for 2.0-7.5% of the total weight of the catalyst, Mo (measured in MoO3) in the active component accounts for 4.0-18.0% of the total weight of the catalyst, Ni (measured in NiO) in the active component accounts for 0.2-5.0% of the total weight of the catalyst, the auxiliary agent accounts for 0.05-1.0% of the total weight of the catalyst, and the balance consists of the carrier. According to the invention, the catalyst prepared by the formula and the method disclosed in the invention can carry out hydrogenation on saturated monoolefine while the catalyst is used for carrying out hydrodesulfurization on oils, can be suitable for technical requirements of heavy oriention, changeable sulphur content, and high air speed of hydrogenation liquid for pyrolysis gasoline two-stage hydrogenated raw materials, and simultaneously, the catalyst has the advantages of low activation temperature and low loss of aromatics in the hydrogenation process.

The invention relates to a method for preparing polyol ester lubricating oil by using a composite solid acid catalyst. The method comprises the following steps of: adding a water carrying agent into polyol ester and monobasic fatty acid, performing esterification reaction under the action of the composite solid acid catalyst, and dehydrating and esterfying to obtain raw ester; performing filter pressing on the raw ester to separate the raw ester from the solid acid catalyst, wherein the catalyst can be recycled; and performing reduced pressure distillation on the raw ester to remove the residual fatty acid, and then deacidifying and decolorizing to refine with heating by using a refining adsorption bed layer respectively to obtain low-acid value polyol ester lubricating oil. The method has the advantages that the catalyst can be recycled, the esterification rate is high, an aftertreatment process is simple, and a product is low in acid value, high in purity, environment-friendly and suitable to be produced industrially. The reaction esterification rate can reach over 99 percent, and the acid value of the ester product obtained through refining can be controlled to be less than 0.01mg KOH/g. The product is excellent in visco-temperature performance, high in lubricity and thermal stability, strong in hydrolytic stability, low in volatility and excellent in electrical insulation property.

The present invention relates to olefin processing technology, and is especially double active component Mn-Ag deoxidizer for deoxidizing olefin and its preparation process and application. The Mn-Ag deoxidizer has Mn3O4 as main active component and small amount of Ag2O catalyst capable of lowering the temperature and decreasing the time for reducing Mn3O4 into MnO possessing deoxidizing activity. The Mn-Ag deoxidizer has calcium aluminate carrier and no other adhesive, high active component content and high deoxidizing capacity, and possesses very high compression strength. The Mn-Ag deoxidizer may be regenerated through reduction at 80-160 deg.c, and can reduce oxygen content in ethylene, propylene, etc at room temperature to below 0.05 ppm. The Mn-Ag deoxidizer is applied in industrial polyolefin production, and has long regeneration period, capacity of preventing poisoning of polymerizing catalyst and low production cost.

The invention provides an exhaust gas purifying apparatus comprising a NOx storage reduction catalyst and a particulate filter, wherein the original NOx storage ability of the NOx storage reduction catalyst is sufficiently utilized. Specifically, the exhaust gas purifying apparatus comprises a filter (40) arranged in the upstream of a NOx storage reduction catalyst (22), a fuel supply means (42) for supplying a fuel so that the fuel is mixed with the exhaust gas flowing into the filter (40), and an ozone supply means (30) for supplying ozone in the downstream of the filter (40) so that ozone is mixed with the exhaust gas flowing into the NOx storage reduction catalyst (22).

The invention discloses a selective hydrogenation catalyst for producing biodiesel and a preparation method and application of the selective hydrogenation catalyst. The selective hydrogenation catalyst comprises a carrier and a main metal active ingredient loaded on the carrier, the main metal active ingredient accounts for 5-30% of the catalyst in weight and is one of or a combination of oxides containing Co, Mo, Ni and W, and the carrier is composed of, by weight, 1-8% of a molecular sieved, 25-65% of amorphous sial, 30-65% of alumina and 2-10% of a graphene auxiliary. The preparation method includes: disposing the carrier in a metal salt solution containing Co, Mo, Ni or/and W for soaking for 4-20 h to obtain a soaked carrier; freeze-drying and then calcining the soaked carrier to obtain the selective hydrogenation catalyst. With same carrying capacity of the carrier, active surface area represented by the carrier is large, the selective hydrogenation catalyst has more active sites, reaction temperature is lowered, and hydrogenation performance is improved.

The invention discloses a palladium alumina for production of hydrogen peroxide by an anthraquinone process. The catalyst comprises gamma-Al2O3 as the carrier, the content of which is over 97wt%; and metal palladium as the main active component, the loading of which is 0.1wt%-0.5wt% and the dipping thickness of which is from 10 micrometers to 100 micrometers. The invention also discloses a preparation method of the catalyst, and the method consists of: roasting aluminum hydroxide, mixing the roasted aluminum hydroxide with pseudoboehmite, then adding a pore-expanding agent for molding, conducting surface treatment so as to obtain a catalyst carrier, then performing pre-spraying on the carrier with a locating agent, carrying out drying, and then putting the carrier into a chloropalladate solution for dipping. With appropriate specific surface area, pore volume and pore size distribution, the palladium catalyst provided in the invention is difficult to shed and fragment. In actual production of hydrogen peroxide by an anthraquinone process, the catalyst shows excellent balance between activity and selectivity, as well as good service life and regeneration cycle.

The invention discloses a construction method and an application of an immobilized biological bacterium agent for a micro-polluted water source and belongs to the field of ecological remediation of water environments. The method is a treating process for purifying a water body through construction of the biological bacterium agent, and ammonia nitrogen, iron, manganese, microcystis, algal toxins and the like in the water body can be removed effectively. The method comprises steps as follows: (1) rescreening and compounding of multifunctional oligotrophic ammonia nitrogen bacteria; (2) screening of efficient algicidal bacteria; (3) fermentation and construction of the bacterium agent; (4) bacterium agent immobilization and biological enhancement; (5) research on dosing methods of the bacterium agent, and treatment and biological enhancement of the micro-polluted drinking water source. The biological bacterium agent is constructed with an immobilization technology, after a system runs stably, the removal rate of the ammonia nitrogen is higher than 80%, removal rates of the microcystis and the algal toxins are higher than 40%, the removal rate of the iron in water is 50%, and the removal rate of manganese is 51%. The method can be combined with actual projects and is wider in application prospect.

The invention relates to a mesoporous molecular sieve catalyst for alkane catalytic dehydrogenation and a preparing method and application thereof. The mesoporous molecular sieve catalyst is characterized in that a metal active component M is introduced in situ in the process of synthesizing a mesoporous molecular sieve HMS, and the active component M is one or a mixture of metal or metallic oxide of Pt, Pd, Ru, Rh, Ni, Co, Fe, Sn and Zn. According to the mesoporous molecular sieve catalyst for alkane catalytic dehydrogenation and the preparing method thereof, the adopted active component is low in price and environmentally friendly, is anchored to a molecular sieve skeleton and highly dispersed, and is not prone to aggregation sintering in the reaction process, the alkane conversion per pass is high, and target product olefins are high in selectivity, stable in performance and long in regeneration period.

The invention relates to a fine desulfurization process by a dry process for natural gas. The process is three-stage normal-temperature fine desulfurization by the dry process for the natural gas: the first-stage desulfurization is crude removal of hydrogen sulfide, and uses a normal-temperature ferric oxide desulfurizer; the second-stage hydrogen sulfide fine removal reactors use a normal-temperature zinc oxide desulfurizer; and the third-stage organic sulfur fine removal reactors use a normal-temperature molecular sieve desulfurizer, wherein the normal-temperature ferric oxide desulfurizer and the normal-temperature molecular sieve desulfurizer can be regenerated for repeated use. The first-stage reactors, the second-stage reactors and the third-stage reactors must be one running reactor and one standby reactor which are mutually switched for use. The process prolongs the regeneration period of organic sulfur adsorbents, avoids the interference of inorganic sulfur on the absorption removal of the organic sulfur, reduces energy consumption and cost, and improves desulfurization accuracy.

The present invention relates to process of catalytically cracking olefin to produce propylene and ethylene, and the process is superior to available technology, which has the problems of poor high temperature hydrothermal stability of catalyst with scaling, deactivation, etc. The technological scheme of the present invention is that C4 and C4+ olefin material is catalytically cracked to produce propylene at the reaction temperature of 450-650 deg.c, reaction pressure of -0.08 to 0.5 MPa and liquid space velocity of 0.5-15/hr under the action of ZSM-5 molecular sieve catalyst containing RE metal and phosphorus oxide. The process may be used in industrial production of propylene through cracking olefin.

The invention relates to a method for producing ethylbenzene by reacting pure ethylene or dry gas with benzene, mainly solving the problems of high dimethylbenzene impurity content in the product ethylbenzene, low ethylbenzene purity, poor catalyst stability and short regeneration period and service life in the process of producing ethylbenzene by reacting pure ethylene or dry gas with benzene in the prior art. In the invention, at least a section of ZSM-5 molecular sieve catalyst I the SiO2/Al2O3 mol ratio of which is 50-150, and at least a section of ZSM-5 molecular sieve catalyst II the SiO2/Al2O3 mol ratio of which is 160-300 are loaded in an alkylation fixed bed type reactor; 30-70wt% of pure ethylene or dry gas enters the bed loaded with the catalyst I, and the residual pure ethylene or dry gas enters the bed loaded with the catalyst II; 80-100wt% of benzene enters the first section of the bed loaded with the catalyst I from the top of the reactor, and the residual benzene enters each catalyst bed below section by section; and the difference between the inlet temperature of each section of catalyst bed and the material inlet temperature at the top of the reactor is controlled not to exceed +/-5 DEG C. The technical scheme better solves the problems and can be used in the industrial production of ethylbenzene by reacting the pure ethylene or the dry gas with the benzene.

The invention discloses a method for advanced treatment and reuse of printing and dyeing wastewater pre-processed by macroporous resin. The method comprises the following steps: taking the printing and dyeing wastewater for the secondary treatment; performing conducting Fenton reaction precipitation, ultra-filtrate membrane filtration, macroporous resin absorption and reverse osmosis membrane separation on discharged wastewater subjected to the treatment, wherein the output water of the reverse osmosis membrane is adopted as the high-quality water for recycling for enterprises, and the concentrated water of the reverse osmosis membrane is emitted on standard, or is emitted to a sewage plant through nano tubes for centralized processing. The method has the advantages that (1) the regular pre-processing technology and multi-media filtration procedure before the macroporous resin is eliminated, and the investment and operation cost is reduced; (2) the ultra-filtrate membrane filtration is adopted as the pre-processing of the macroporous resin, the input water quality is improved, pollutants, such as suspended solids, in water are greatly reduced, the service life and the regeneration period are prolonged, and the operation cost is lowered; (3) the macroporous resin absorption is added as the pre-processing of the reverse osmosis membrane on the basis of the ultra-filtration, the input water quality of the reverse osmosis membrane is improved, pollution is relieved, the service life and the cleaning period are prolonged, and the water output of the reverse osmosis membrane is improved.

The invention discloses a selective hydrogenation catalyst for producing biological aviation kerosene and a preparation method and an application thereof. The catalyst comprises a carrier and a main metal active component; the main metal active component is loaded on the carrier; the main active metal component accounts for 0.05-1.15 wt% of the catalyst finished product and is Pt or/and Pd; the carrier comprises the raw materials by the weight percentage: 2-10% of molecular sieve, 25-65% of amorphous silicon aluminum, 30-65% of alumina and 2-10% of a graphene auxiliary agent. The method comprises the steps: placing the carrier in a solution containing Pt and/or Pd metal salts, and immersing for 4-20 h, to obtain a carrier after impregnation; and drying the carrier obtained after impregnation, and then treating the dried carrier in a reducing atmosphere, to obtain the selective hydrogenation catalyst. Under the same loading capacity, the selective hydrogenation catalyst has larger representative active surface area and more active sites, reduces the reaction temperature, and improves the hydrogenation performance.

The invention relates to a zero-discharge on-line treatment process for preparing deionized water from copper sulphate electroplating waste water. The treatment process comprises 1, adsorbing organic matters in the copper sulphate electroplating waste water through combination of active carbon and ion exchange resin, 2, adsorbing heavy metal ions in the waste water treated through the step 1 through ion exchange resin and 3, purifying the electroplating waste water without the organic matters and heavy metal ions through a purified water ion exchange preparation method to obtain deionized water. The organic matters in the copper sulphate electroplating waste water are removed through the combination of active carbon and ion exchange resin so that the organic matters in the copper sulphate electroplating waste water are completely removed and a regeneration period and a service life of the later resin are prolonged. Through the zero-discharge on-line treatment process, the copper sulphate electroplating waste water is completely purified to form deionized water satisfying electroplating water quality requirements and the prepared deionized water is returned to a copper sulphate electroplating unit so that water use and waste water treatment processes in the copper sulphate electroplating unit form a closed cycle and thus 100% recycle is realized.

The invention relates to deoxidization techniques in the chemical industry and particularly provides a manganese deoxidizer adopting a cerium-based oxide as a carrier, a preparing method thereof and applications of the deoxidizer. A catalyst comprises active components, a carrier and an adhesive, wherein the active components include Cu and MnO and account for 35-75% by weight of the catalyst, the carrier is CeO2 or a CeO<2>-MOx composite oxide and accounts for 20-50% by weight of the catalyst, and the adhesive is one or more selected from a group consisting of kaolin, high-alumina cement, pseudo-boehmite and titanate and accounts for 1-20% by weight of the catalyst. A product of the manganese deoxidizer is suitable for activation and regeneration conditions of polyolefin apparatuses at present, and is high in deoxidization capacity and long in service lifetime, and therefore the product is suitable for large-scale industrial application.

The invention relates to the field of ion exchange resin regeneration and provides a method for regenerating anion exchange resin. The method comprises the steps of putting the anion exchange resin to be regenerated into a glass chromatographic column at the temperature of 5-50 DEG C through a wet-process column packing method, wherein the diameter-height ratio is 1: 2-1: 8, making 0.5-8 BV of an alcohol-alkaline solution pass through an anion exchange column, conducting washing till PH is not higher than 9, then making 0.5-6 BV of a hydrochloric acid solution pass through the anion exchange column, conducting washing till PH is not lower than 5, finally, making 0.5-6 BV of a sodium hydroxide solution pass through the anion exchange column, and conducting washing till PH is not higher than 9, so that regeneration of the anion exchange resin is completed. By means of the method, defects of existing anion exchange resin regeneration methods in stevioside production are overcome, the regeneration exchange capacity of the anion exchange resin is greatly improved, the handling capacity is remarkably increased, and the regeneration cycle is longer.

Disclosed is a post-processing system and method of aniline, which relates to a device and method for processing catalyst powder after fluidized bed for hydrogenation preparing aniline from nitrobenzene, and reducing nitrobenzene content in aniline. In the invention, over-hot gas containing catalyst powder is directly fed into a device provided with an inclined barrier and a valve tray structure. Rising of catalyst powder is prevented by the inclined barrier, the valve tray structure and liquid spraying, the sparaying liquid at the bottome is discharged timely. The invention also proposes three methods for processing the gas induced from the device to respectively obtain eligible aniline (wherein nitrobenzene content is less than 0.5 mg/kg), eligible wastewater (wherein aniline content is less than 50 mg/kg) and eligible hydrogen (aniline is less than 0.1% and used for circulation). The device of the invention can effectively solve the default that, the catalyst powder is deposited in the cooled liquid thereby jamming a heat changer and increasing the process resistance), and realize long-period continuous operation.

This invention relates to a method for producing propylene. The previous methods cannot satisfy high reaction space velocity, high hydrocarbon conversion rate, high propylene selectivity and long catalyst regeneration cycle at the same time. The method in this invention utilizes C4 or higher olefins as the raw materials, and contacts olefin raw materials and MFI zeolite catalyst (SiO2/Al2O3 mol. ratio lower than 360) to produce propylene-containing effluent. The yield of propylene is 30-50 wt.% of olefin raw materials. The method can be used in industrial production of propylene from C4 or higher olefins.

The invention relates to a process of preparing industrial ultra-pure water with softening apparatus rear- mounted hyperfiltration apparatus. It comprises processes of hyper- filteration and softening pre- treated water, and preparation of high- purity water in continuous electric deion and desalt apparatus. The invention is characterized by reduced softening apparatus size, small occupation area, low investment, long regenerative period for softening apparatus, low energy consumption, small operational cost, simple operation and convenient maintenance.