24results about How to "Strong acid" patented technology

The invention discloses a composite carrier supported hydrogenation catalyst and application thereof, the composition of the catalyst is Pd-M-Nb2O5-B, and the content of the active component palladium Pd is 0.2-1.5%; the auxiliary agent M is one or two of silver and bismuth, and the molar ratio of the content of the auxiliary agent M to the active component Pd is 1: (0.5-4); nb2O5-B is a composite carrier, and the composite carrier accounts for 97.0-99.5% of the total weight of the catalyst; in the composite carrier Nb2O5-B, the content of Nb2O5 is 8 to 15 percent; b is one or more of TiO2, SiO2 and Al2O3, and the weight ratio of TiO2 to SiO2 to Al2O3 is (1-3): (5-20): 100. The catalyst has excellent water resistance, the complex carrier has stronger acidity compared with common solid acid, the product yield is higher, and the stability of the acetyl n-propanol generated by the reaction of the catalyst can be improved.

The invention relates to a one-dosage type copper-molybdenum display etching solution and a preparation method and application thereof. The etching liquid comprises the following components in parts by weight: 5-15 parts of hydrogen peroxide; 10 to 15 parts of organic acid; 8-12 parts of an organic base; 0.008 to 0.07 part of a chelating agent; 0.002 to 0.07 part of a corrosion inhibitor; 0.04 to 0.3 part of a surfactant; 0.1 to 0.6 part of a hydrogen peroxide stabilizer; and 65-73 parts of ultrapure water. The chelating agent and the corrosion inhibitor in the etching solution are jointly adsorbed on the metal surface, the corrosion inhibitor and the chelating agent can form intermolecular hydrogen bonds to obtain a product with larger molecular volume, the product is adsorbed on the metal surface to generate a protective isolation layer, and meanwhile, the contained delocalized large pi bonds and nitrogen atoms can provide electron pairs for empty orbits of metal, so that the metal surface is protected. And coordination bonds are formed to be adsorbed on the metal surface to form a compact adsorption film, so that the corrosion of the metal is effectively inhibited, and the taper angle and the etching morphology of the etched metal are stabilized.

The invention belongs to the technical field of polyether preparation, and discloses a heterogeneous solid catalyst and a method for preparing styrylphenol polyoxyethylene ether by using the heterogeneous solid catalyst. The preparation method comprises the following steps: dispersing a nano inorganic solid material serving as a pore-making hard template into high-molecular resin, and dissolving in acid liquor to remove the nano inorganic solid material, so as to obtain porous polymer microspheres; and swelling and dispersing the perfluorosulfonic acid polymer, and impregnating the porous polymer microspheres to obtain the heterogeneous solid catalyst. The heterogeneous solid catalyst provided by the invention has the advantages of strong acidity, large specific surface area and excellent catalytic performance, is beneficial to the generation of stilbene phenol, and reduces the residue of free phenol, so that the prepared styryl phenol polyoxyethylene ether has high purity and less foam. The heterogeneous solid catalyst provided by the invention is small in corrosion to equipment, high in reusability and beneficial to being directly applied to actual production.

The invention relates to a novel SCM-41 molecular sieve as well as a preparation method and application thereof, and the SCM-41 molecular sieve has a unique X-ray diffraction pattern and has a good application prospect in the aspects of adsorption separation, ion exchange and catalytic conversion of organic compounds.

This invention provides the application of polyferric sulfate in improving plant salt stress resistance and / or improving saline-alkali land, belonging to the field of agricultural technology. The polyferric sulfate application provided by this invention can effectively improve the germination ability of plant seeds under salt stress, effectively enhance the activity of plant antioxidant systems and photosynthetic efficiency, thereby effectively improving the survival rate and growth performance of plants under salt stress. Simultaneously, polyferric sulfate can effectively reduce the EC value of saline-alkali soil, thereby effectively improving the germination rate of plant seeds in saline-alkali land and effectively improving saline-alkali land. This invention is simple to operate, low in cost, and environmentally friendly, suitable for enhancing the salt and alkali tolerance of plants, and has broad application prospects.

The invention discloses an ultralow-temperature manganese-based SCR (Selective Catalytic Reduction) denitration catalyst and a preparation method thereof. The SCR catalyst comprises manganese oxide, zirconium oxide and tin oxide, in the catalyst finished product, the content of ZrO2 is 26-32 mol%, the content of SnO2 is 13-16 mol%, and the balance is MnO2 in terms of the total content of metal oxides being 100 mol%; by accurately controlling the contents of manganese oxide, zirconium oxide and tin oxide and the addition amount of cetyltrimethylammonium bromide (CTAB), the pore structure of the SCR catalyst is optimized, the activity and selectivity of the catalyst are improved, the performance of the catalyst is improved, and the catalyst can keep higher denitration efficiency under different working conditions; the conversion rate of the ultralow-temperature SCR catalyst to NO reaches 95% or above under the conditions that the reaction space velocity is 100,000 h <-1 > and the temperature is 80 DEG C, and the conversion rate is maintained at a high level for a long time.

The invention provides a hydrogenation catalyst. The catalyst comprises a carrier alumina and an active component ruthenium attached to the carrier. The particle size D10 of the carrier is less than 10 microns, the particle size D50 is 30-60 microns, and the particle size D90 is 120-150 microns. After the catalyst is screened according to D50, the fine-particle-size catalyst is used for preparing low-trans HMDA through an MDA hydrogenation reaction, the coarse-particle-size catalyst is used for preparing high-trans HMDA through an MDA hydrogenation reaction, the MDA conversion rate is 100%, the HMDA yield reaches 95% or above, no heavy-component tar exists, and no obvious inactivation exists after the catalyst is used for 60 batches.

This invention discloses a rapid thermally conductive coated sand and its preparation process, relating to the field of coated sand technology. The raw materials include the following parts by weight: 100-105 parts raw sand, 6-8 parts modified resin prepolymer, 2-4 parts modified POE, 3.5-4.5 parts lubricant, and 3-5 parts nano-silicon nitride. The modified POE has a strong high-temperature toughening effect on the modified resin prepolymer and can also form chemical crosslinks with it, exhibiting strong compatibility with other raw materials in the coated sand. The modified resin prepolymer is obtained by heating and ring-opening polymerization of benzoxazine monomers obtained from the reaction of 5-nitrosalicylic acid, ethyl 2,4-ditrifluoromethyl-5-pyrimidinecarboxylate, paraformaldehyde, and furfurylamine. The modified resin prepolymer has a lower curing temperature and improved thermal stability, which helps to improve the high-temperature resistance of the coated sand.

The invention discloses a preparation method and application of a magnetic composite transition bimetallic oxide catalyst, and belongs to the technical field of transition bimetallic oxide catalysis, the chemical formula is CoxNi (1-x) Fe2O4, and x is 0.05-0.25. A cobalt salt, a nickel salt and an iron salt are used as raw materials, a strong reducing agent is added, and a one-pot hydrothermal crystallization method is adopted. The composite transition bimetal oxide catalyst provided by the invention is simple in preparation method, short in production period and relatively strong in inherent magnetism, and can be accurately separated by virtue of an external magnetic field after being used, so that the recovery and reutilization of the catalyst are realized; the problems that metal active components are easy to lose, and the catalyst is easy to deactivate due to carbon deposition and is difficult to recover in the using process of a metal supported catalyst are thoroughly solved. The gt can be efficiently and selectively cracked when the gt is applied to a relevant model compound of lignite and a catalytic hydrogenation conversion process of Dongming lignite in Inner Mongolia; c to Clt; and a heteroatom gt; c-X bridged bonds (X = O, N, S and the like), so that the purpose of converting the low-metamorphic coal into the aromatic hydrocarbon at high yield is achieved.

The invention belongs to the technical field of oil field reservoir exploitation, and discloses a preparation method of acid slick water based on a betaine surfactant. The preparation method comprises the following steps: adding N, N-di-n-alkylamine, 2-chloroethanol and a sodium hydroxide solution into a flask, reacting at 80-90 DEG C, and removing redundant 2-chloroethanol in a product to obtain an intermediate I; and adding the intermediate I into the flask, heating, slowly adding maleic anhydride into the flask, reacting at 80-85 DEG C, and drying the product to obtain the betaine surfactant drag reducer. And adding the drag reducer into water, stirring, adding the clay stabilizer and the cleanup additive, and uniformly dissolving to obtain the acid slick water based on the betaine surfactant. According to the acid slick water, acid fracturing is carried out without additional acid liquid, the acid betaine surfactant firstly forms wormlike micelles, the wormlike micelles reach a target reservoir, gel breaking is carried out, then the wormlike micelles are hydrolyzed to generate maleic acid, gradient release of the acid liquid can be achieved, far-end fracture steering is better facilitated, and the acid fracturing effect is enhanced.

The invention discloses a catalyst for preparing 2, 6-diisopropylnaphthalene through naphthalene alkylation reaction as well as a preparation method and application of the catalyst, and belongs to the field of fine chemical engineering. The method comprises the following steps: carrying out heat treatment, filtration and primary roasting on an acid dispersion liquid of hydrogen-type mordenite to obtain acid-treated mordenite; and treating the zirconium sulfate dispersion liquid of the acid-treated mordenite at 60-90 DEG C for 2-8 hours, filtering, and carrying out secondary roasting to obtain the catalyst for preparing 2, 6-diisopropylnaphthalene through the naphthalene alkylation reaction. The obtained catalyst is suitable for alkylation reaction of naphthalene, isopropanol and propylene in a fixed bed reactor, the conversion rate, the yield and the selectivity of the reaction are remarkably improved, and meanwhile generation of carbon deposition is greatly inhibited. The method is simple in preparation process and low in catalyst cost, and has a wide industrial application prospect.

The invention provides a cleaning agent for an electric drinking water boiler of a bullet train and a preparation method of the cleaning agent, and belongs to the technical field of cleaning agents. The cleaning agent is prepared from the following raw materials in parts by weight: 4-7 parts of a bio-based surfactant, 2-3 parts of a cosurfactant, 100-120 parts of water, 3-5 parts of citric acid, 2-5 parts of acetic acid, 2-3 parts of EDTA (Ethylene Diamine Tetraacetic Acid) disodium and 20-30 parts of ethanol. The cleaning agent for the electric drinking water boiler of the motor car, prepared by the invention, has the characteristics of strong cleaning power, good descaling effect, low toxicity, low sensitivity, degradability, no irritation and the like, is high in safety and environment-friendly, does not pollute water quality when being used for cleaning tableware, and has a wide application prospect.

This invention discloses a dry gas hydrogenation catalyst and its preparation method. The support component is alumina, and the active components are Group VIB metal sulfides and Group VIII metal sulfides. The average number of lamellar layers of the sulfides is <1.5 layers, and the proportion of single layers is 65%~80%. Based on the weight of the catalyst, Group VIB metal sulfides account for 1wt%~20wt% of the total mass of the catalyst, and Group VIII metal sulfides account for 0.5wt%~10wt% of the total mass of the catalyst. The total acid content of the catalyst is 0.1~0.25 mmol / g, of which the strong acid content at 400-500℃ accounts for 1%~6%, the medium-strength acid content at 250-400℃ accounts for 10%~20%, and the weak acid content at 150-250℃ accounts for 74%~89%. The preparation method is as follows: Boehmite dry adhesive powder is calcined at high temperature in an oxygen-containing atmosphere. The alumina dry adhesive powder is then impregnated with an active component impregnation solution, dried, and calcined at high temperature in an oxygen-containing atmosphere. Finally, it is calcined in a mixed atmosphere of H2S and H2. After molding, drying, and calcination, a dry gas hydrogenation catalyst is obtained. The catalyst of this invention exhibits good hydrogenation performance for organic sulfur and olefins, and also possesses excellent resistance to carbon deposition.

The present invention belongs to the field of catalytic technology, and is specifically related to a composite catalyst for synthesizing N-hydroxyethyl pyrrolidone from γ-butyrolactone and ethanolamine, and its preparation method and application. The composite catalyst is composed of Hβ molecular sieve, auxiliary agent and active component, wherein Hβ molecular sieve accounts for 45-75% of the catalyst mass, auxiliary agent accounts for 20-50% of the catalyst mass, and active component accounts for 2-10% of the catalyst mass. The composite catalyst prepared by the present invention is highly acidic, has a large specific surface area, increases the contact area between the reactant and the active site, greatly improves the reaction efficiency, and is more conducive to the mass transfer of the reactant and the transportation of the product. Therefore, the catalyst is used to catalyze the reaction of synthesizing N-hydroxyethyl pyrrolidone from γ-butyrolactone and ethanolamine, and extremely high catalytic activity is embodied: at relatively low temperatures (200-300°C), relatively low pressures (0.1-5MPa) and under anhydrous conditions, the conversion rate of γ-butyrolactone can be achieved to reach 88%, the selectivity of NHP reaches 92.3%, and the purity of N-hydroxyethyl pyrrolidone product separated by subsequent rectification reaches 99.8%.

The present invention relates to the field of catalyst preparation, and discloses a catalytic cracking catalyst and a preparation method and application thereof, the catalytic cracking catalyst contains catalytic cracking active components, and the catalytic cracking active components comprise a rare earth modified molecular sieve, a phosphorus oxide and a magnesium oxide; the content of SO4 < 2-> in the rare earth modified molecular sieve is less than or equal to 1wt%. According to the catalytic cracking catalyst provided by the invention, the rare earth modified molecular sieve with low sulfate radical, high crystallinity, strong acidity and good stability is matched with the phosphorus source and the magnesium source for use, so that the catalytic cracking catalyst has the characteristics of good activity stability, high heavy oil conversion rate and high diesel oil yield, and is particularly suitable for catalytic cracking of heavy oil; in the catalytic cracking process of heavy oil, not only can high catalytic cracking activity be shown, but also high diesel oil yield can be obtained.

The present invention proposes a motor vehicle sewage pipe cleaning agent and a preparation method and application thereof, belonging to the technical field of cleaning agents. Silane coupling agent is used to modify silicon dioxide, and then react with epichlorohydrin, and then react with alkyl polyglycoside, and then react with alkyl polyglycoside, and the obtained product is mixed with anionic surfactant, aminosulfonic acid, and citric acid to obtain a motor vehicle sewage pipe cleaning agent. The motor vehicle sewage pipe cleaning agent prepared by the present invention has the characteristics of being degradable, green, environmentally friendly, low in toxicity, and mild, has strong detergency, high descaling rate, synergistic decontamination effect between components, low corrosiveness, and has broad application prospects.

The application discloses a metal organic framework material composite catalyst and a preparation method and application thereof, and belongs to the technical field of industrial catalytic material preparation and CO2 catalytic conversion. The application takes metal organic framework material UIO-66 as a catalyst carrier and a reaction intermediate (methanol) for preparing aromatic hydrocarbon catalyst, obtains a metal oxide / metal organic framework material composite catalyst through metal oxide modification, realizes direct preparation of aromatic hydrocarbon through CO2 hydrogenation without HZSM-5 molecular sieve, effectively inhibits a side reaction, and can also obtain high selectivity of aromatic hydrocarbon under lower pressure. Compared with existing catalysts, the catalyst prepared in the application has great improvement in catalytic activity in the reaction of preparing aromatic hydrocarbon through CO2 hydrogenation, the preparation method of the catalyst is simple to operate, raw materials are cheap and easy to obtain, and the catalyst meets the demand of green industrial production.

The invention provides a bullet train blow-off pipeline cleaning agent and a preparation method and application thereof, and belongs to the technical field of cleaning agents. The preparation method comprises the following steps: modifying silicon dioxide with a silane coupling agent, then reacting with epoxy chloropropane, reacting with alkyl glycoside, then reacting with alkyl glycoside, and uniformly mixing the prepared product with an anionic surfactant, sulfamic acid and citric acid to prepare the motor car blow-off pipeline cleaning agent. The bullet train blow-off pipeline cleaning agent prepared by the invention has the characteristics of degradability, greenness, environmental protection, low toxicity and mildness, is strong in detergency, high in descaling rate, small in corrosivity and wide in application prospect, and has a synergistic decontamination effect among the components.

The present invention provides a flue gas carbon dioxide capture and conversion integrated synergistic CO, HC, NO x The catalytic purification method belongs to the technical field of flue gas purification. The present invention uses CeNiCa-based composite materials to capture and convert flue gas after pretreatment. During the capture process, when the flue gas flows through the composite material, carbon dioxide is adsorbed by the adsorbent to form carbonates, nitrogen oxides are adsorbed by the adsorbent to form nitrates, carbon monoxide and hydrocarbons are catalytically oxidized to generate carbon dioxide under the action of the catalyst, and the generated carbon dioxide is also adsorbed to form carbonates; hydrogen is introduced into the conversion process for catalytic reaction, and the adsorbed carbonate is catalytically reduced to methane, thereby realizing the resource utilization of the captured CO2, and the adsorbed nitrate is catalytically reduced to nitrogen, thereby realizing the purification of flue gas; the entire reaction can be realized in the same device, and it has the functions of CO2 capture and pollutant purification at the same time, and the system is simple and compact.

The present invention relates to a device and method for preparing cumene by hydrogenolysis of α,α-dimethylbenzyl alcohol, the device comprising a first hydrogenation reactor, a flash separator, a second hydrogenation reactor and a deweighting device connected in sequence; an organic acid adding device is arranged at the raw material inlet of the first hydrogenation reactor; a flash separator is arranged at the reactant outlet of the first hydrogenation reactor, and a liquid phase product obtained by the flash separator flows into the second hydrogenation reactor. The method is carried out in the device, and the present invention improves the acidity of the reaction system of the first hydrogenation reaction by mixing the raw material containing α,α-dimethylbenzyl alcohol with an organic acid, so that the first hydrogenation reaction can be carried out at a lower temperature, which not only reduces the unit consumption of cumene, but also avoids the problem of increased by-products caused by increased temperature.

This invention discloses a modified aluminum sol, its preparation method, and its application, belonging to the field of aluminum sol technology. The method includes the following steps: At room temperature, a 2 mol / L aluminum trichloride solution is prepared using crystalline aluminum chloride and distilled water. A 6 mol / L ammonia solution is added dropwise to the aluminum trichloride solution until the pH of the system reaches 7-8. The solution is filtered, and the filter cake is washed to obtain an intermediate product. Another 2 mol / L aluminum trichloride solution is prepared, and the intermediate product is added to it. After stirring for 10 minutes, the temperature is raised to 60°C for 50-60 minutes to obtain an aluminum sol. The aluminum sol is ultrasonically dispersed at room temperature for 15 minutes and then transferred to a reaction vessel. The reaction temperature is controlled at 60°C, and auxiliary components are added under stirring conditions. The reaction is maintained at this temperature for 3 hours to obtain the modified aluminum sol. This invention does not add highly corrosive hydrochloric acid during the preparation of the modified aluminum sol, making it safe and environmentally friendly. Furthermore, the introduction of auxiliary components improves the stability and adhesion of the aluminum sol.

The invention belongs to the technical field of production of biological organic fertilizers, and particularly relates to a biological organic fertilizer prepared from fermented agricultural wastes and a preparation method of the biological organic fertilizer. The biological organic fertilizer is prepared from the following raw materials in parts by mass: 65 to 85 parts of pretreated agricultural waste, 5 to 15 parts of silkworm manure, 5 to 10 parts of olive pomace, 5 to 10 parts of herb residue biochar and 0.2 to 0.5 part of fermentation inoculant, the biological organic fertilizer has the advantages that the yield of the purple cabbages and the content of vitamin C and anthocyanin are obviously increased, and the phenomena of hollow heart diseases, leaf head cracking and soil hardening of the purple cabbages are avoided.

The invention relates to the field of molecular sieves, in particular to an SCM-36S molecular sieve, a preparation method and application thereof, a composition and a methanol conversion method. The molecular sieve has specific X-ray diffraction pattern characteristics. The SCM-36S molecular sieve with the X-ray diffraction pattern characteristics is thin in crystal thickness, large in external specific surface area, large in acid amount, large in strong acid amount, fast in molecular diffusion and high in activity and stability. The molecular sieve provided by the invention is used for alkyl benzene cracking reaction or methanol conversion to prepare olefin and / or aromatic hydrocarbon, and has the advantages of high reactant conversion rate, high product yield and long service life.

The invention provides a transition metal oxide loaded aluminum oxide hierarchical pore catalytic material as well as a preparation method and application thereof. The hierarchical pore catalytic material Mo / V coated H-Al2O3 is prepared from hierarchical pore H-Al2O3 and an active component loaded on the hierarchical pore H-Al2O3, and the active component mainly comprises V2MoO8. The preparation method of Mo / V-coated H-Al2O3 mainly comprises the following steps: introducing ammonium molybdate and ammonium metavanadate into hierarchical pore H-Al2O3 through a continuous impregnation method, and preparing by combining with a calcination process. The solid acid catalyst with the hierarchical pore catalytic material Mo / V coated H-Al2O3 as the double active centers has a macroporous-mesoporous hierarchical pore structure and a high specific surface area, macropores are beneficial to transfer and diffusion of oil reactants and products, and carbon accumulation is reduced; the double-acid catalytic sites show synergistic catalysis, so that the catalytic activity of the material is remarkably improved, and the material can be used as a catalyst to convert oil into biofuel in one step. As a catalyst, the Mo / V-coated H-Al2O3 material has the advantages of wide raw material application range, high catalytic activity, good stability and the like.