353results about How to "Increased crush strength" patented technology

The present invention is carrier in special shape, catalyst and their preparation process. The carrier is one ellipsoid with the major axis-to-minor axis ratio a/b of 1.05-2.5 and one or several grooves in the major axis direction. The carrier is prepared through pressing the material containing oxide hydrate in a mold to form, and heating the formed matter to convert the oxide hydrate into oxide. The carrier may be applied as adsorbent, catalyst carrier, reactor stuffing, etc. The catalyst prepared with the carrier has relatively great outer surface area and excellent mass transferring process, and may be applied widely in heavy oil processing reaction, etc, especially as hydrogenation activity protectant.

The invention relates to a steel used for straight seam electric resistance welding petroleum casing and a casing manufacturing method, which is applied to a straight seam electric resistance welding petroleum casing used for an oil and gas well in petroleum and gas industry. The steel used for the straight seam electric resistance welding petroleum casing comprises the following components in percentage by mass: 0.15-0.28% of C, 1.0-1.6% of Mn, 0.2-0.4% of Si, 0. 02-0.06% of Al, less than or equal to 0.01% of P, less than or equal to 0.005% of S, less than or equal to 0.008% of N, 0.001-0.005% of Ca and the balance of Fe. The preparation method comprises the steps of: preparing hot-rolled plate coils, producing straight seam electric resistance welding steel pipes by the hot-rolled plate coils, carrying out welding seam normalization or overall normalization on the welded steel pipes, straightening and cutting the normalized or tempered welded steel pipes into pipe segments with the length of 10-12m, and processing API standard screw threads. The invention has the advantages that the steel has good strength and toughness, the welding seam has no defect, and the properties of the steel are uniform with those of mother material. The yield strength is greater than or equal to 380-760MPa, the tensile strength is greater than or equal to 520-865MPa, the elongation is greater than or equal to 20%, and the impact energy of a room-temperature transverse full-size V-shaped notch is greater than or equal to 40J.

The invention discloses a method and a die for the forward extrusion and variable diameter bending extrusion of magnesium alloy semi-solid billets. The preparation method comprises a predeformation process and an isothermal spheroidizing heat treatment process, wherein in the predeformation process, uniform deformation of large deformation amount is realized by the die for the forward extrusion and variable diameter bending extrusion; cutting a magnesium alloy bar stock which is subjected to large deformation by a fixed size; heating the magnesium alloy bar stock cut by the fixed size at the temperature of between 520 and 580 DEG C under the protection of argon, and keeping the temperature of the obtained magnesium alloy bar stock for 10 to 30 minutes; and processing a bending extrusion angle of the die to be over 90 degrees. The method has the advantages of small predeformation resistance, large and uniform deformation, safety, reliability and no three-waste pollution. The grains of the prepared magnesium alloy semi-solid billets have fine size, are uniform and have a shape close to that of a sphere. The method solves the problem that the conventional SIMA method cannot continuously prepare the large-size semi-solid billets and meets the requirements of the semi-solid thixoforming workpieces for large-scale continuous production.

An adsorbent for adsorbing p-xylene from mixed C8 arylhydrocarbon is composed of the adsorptive active component chosen from Ba or Ba and K exchange X zeolite to Y zeolite (88-95 mass%) and the kaolinite. Its advantages are high adsorption capacity and high adsorption selectivity.

The invention discloses a dechlorination agent and a preparation method thereof. The dechlorination agent is prepared from the following materials: 15-70wt% of carrier, 15-60wt% of active components, 1-10wt% of a pore-forming agent, 1-5wt% of an extrusion aid and 2-10wt% of a binder, wherein the carrier is at least one of weak acid salt, kaolin, pseudo-boehmite or Al2O3. The preparation method comprises the steps of mixing the materials, adding water, mixing, kneading, extruding, drying and calcining. The dechlorination agent has the advantages of high adsorption efficiency against high-concentration or low-concentration HCl at normal temperature, high dechlorination precision, high chlorine content of above 30% and a certain adsorption effect against organic chlorides; chemical reaction adsorption is adopted for adsorption against HCl, the adsorption is performed at normal temperature and normal pressure, energy consumption is not required, and the absorbed HCl and the active component in the dechlorination agent perform reaction to form a stable chemical substance to exist in an adsorber bed layer; and the dechlorination agent further has the advantages of low toxicity, high stability, easiness in filling and unloading, and no secondary pollution.

The invention discloses an improved wrapping material for dripping pills of a cigarette additive, which belongs to the technical field of cigarettes. The improved wrapping material comprises, by weight, 6 to 20 of sodium alginate, 0.1 to 3 of Arabic gum and 77 to 95 of water. A preparation method for the wrapping material comprises the following steps: uniformly mixing the above-mentioned components in proportion, stirring the components in a reaction pot with a heating interlayer, heating the interlayer to a temperature of 75+-5 DEG C with steam, carrying out insulation for 1 to 2 h after anobtained mixture is melt, standing the melt mixture until foam floats upward and filtering the mixture with temperature maintained to be 75+-5 DEG C so as to obtain a filtrate which is the wrapping material for dripping pills of a cigarette additive. The improved wrapping material provided in the invention guarantees that prepared dripping pills have a uniform size, good circularity, improved crushing strength, increased rubber thickness and enhanced brittleness and enables the product qualification rate and yield of the dripping pills to be improved and product quality of cigarettes to be effectively ensured.

The invention provides a method for molding a tin-silicon molecular sieve and the molded tin-silicon molecular sieve. The method comprises the following steps: carrying out hydro-thermal treatment on a tin-silicon molecular sieve in an aqueous mixture in a closed container; molding slurry obtained in hydro-thermal treatment to obtain a molded body, and roasting, wherein the aqueous mixture is from a crystallized mother liquor containing silicon molecular sieve, and the crystallized mother liquor contains at least one alkaline template agent. The molded tin-silicon molecular sieve prepared by the molding method has a relatively high catalytic activity and high crushing strength. The invention further provides a method for preparing dimethyl sulfoxide. In the method, the molded tin-silicon molecular sieve is used as a catalyst to obtain high conversion rate of dimethyl sulfide, high effective utilization of an oxidant and high selectivity of dimethyl sulfoxide.

The invention discloses an inner core type cloverleaf-pattern catalyst carrier and a preparation method and application thereof. The catalyst carrier comprises a catalyst carrier bar, and the catalyst carrier bar comprises an outer shell and an inner core. The cross section of the outer shell is in a hollow cloverleaf pattern, and the hollow part of the outer shell is filled with the inner core. The outer shell is made of a porous structure material. The inner core is made of a compact structure material, and the specific surface area of the inner core is smaller than 1 m<2>/g. The preparation method includes the steps that 1, Al2O3 powder which is of a porous structure is fully mixed with an aqueous solution containing an extrusion aid and a peptizing agent, so that a material I is obtained; 2, Al2O3 powder which is of a compact structure is fully mixed with an aqueous solution containing an extrusion aid and a peptizing agent, so that a material II is obtained; 3, after the material I and the material II are subjected to extrusion molding, drying and calcining are conducted. The catalyst carrier is applied to preparation of a Fischer-Tropsch synthesis catalyst. The catalyst carrier is high in anti-crush strength, large-scale industrial production can be achieved, the diffusing effect in the Fischer-Tropsch synthesis catalyst prepared through the catalyst carrier is small, methane selectivity is low and C5+ selectivity is high.

The invention discloses a preparation method of a hydrotreating catalyst. The method consists of: first pulping aluminum hydroxide or alumina into a slurry, adding concentrated phosphoric acid to react so as to obtain a sol; then taking the sol as a binder, kneading the sol with large hole alumina and small hole alumina, and conducting shaping, drying and roasting to obtain an alumina carrier; and then steeping the alumina carrier with an active metal component steeping solution, and carrying out drying and roasting so as to obtain the hydrotreating catalyst. In the invention, phosphorus is introduced into the alumina carrier in the form of a binder, and can play a structural assistant role to improve the active metal dispersity on the alumina carrier. The weak acid amount of the carrier is increased, the amount of strong-medium acid is decreased, and the total acid amount is reduced. Particularly, the corrosive effect of the phosphorus-containing binder on an alumina carrier frame is greatly mitigated, the pore structure and mechanical strength of the alumina carrier and the catalyst can be significantly improved, meanwhile, consumption of the phosphorus-containing sol binder is low, and the preparation process is environment-friendly and pollution-free.

A gas antichlor comprises 50 to 88 mass percent of alkaline earth oxides, 10 to 40 mass percent of alumina and 2 to 30 mass percent of bentonite. The antichlor can effectively remove the hydrogen chloride in the gas at high temperature, is especially suitable for the dechlorination of a constant reforming and regenerative gas with high water content, is not easy to slime or cake in the process of dechlorination, and has higher crushing strength.

The invention discloses a preparation method for a Silicate-1 molecular sieve catalyst, the Silicate-1 molecular sieve catalyst prepared by the method and a method for preparing caprolactam from cyclohexanone oxime. The preparation method for the Silicate-1 molecular sieve catalyst comprises the steps: a. mixing a silicon source, a metal ion source, an organic template agent and water, so as to obtain a colloidal mixture; b. subjecting the colloidal mixture obtained in the step a to hydrothermal crystallization, so as to obtain a crystallized product; c. subjecting the crystallized product obtained in the step b to washing and separating treatment, so as to obtain metal ion containing Silicate-1 molecular sieves; and d. subjecting the metal ion containing Silicate-1 molecular sieves obtained in the step c to forming treatment, roasting treatment and aftertreatment by an alkaline buffer solution of a nitrogen containing compound, and carrying out washing, separating and drying, thereby obtaining the Silicate-1 molecular sieve catalyst containing trace metal ions. By adopting the method, the performance of the Silicate-1 molecular sieve catalyst can be effectively changed; and by applying the catalyst to the production of the caprolactam, an unexpected result can be achieved.

The invention discloses an alumina supporter and a preparation method thereof. The specific area of the supporter is 170-200 m<2>/g, the pore volume is 0.85-1.0 mL/g, the pores with the diameter of 10-25 nm account for 40-50% of the total pore volume, the pores with the diameter of 100-250 nm account for 25-35% of the total pore volume, and the crushing strength is 200-220 N/cm. The preparation method comprises the following steps: respectively roasting one quasi-boehmite dry gelatine powder at 450-600 DEG C and 700-900 DEG C for 3-5 hours to prepare two alumina dry powders; weighing the two alumina dry powders, evenly mixing with the quasi-boehmite dry gelatine powder (the same quasi-boehmite dry gelatine powder), extrusion aid and peptizator, extruding into strips and molding; and drying and roasting the molded material to obtain the alumina supporter. The alumina supporter has the advantages of large pore volume, proper specific area and proper mechanical strength, has a double pore structure, and thus, is suitable to be used as a hydrogenation protecting agent for heavy oil and a supporter of a demetallization catalyst. In addition, the preparation method is simple, and is suitable for industrial application.

The present invention relates to one kind of catalyst for dehydrogenating alkyl arene to prepare alkyl alkynyl arene and aims at raising the selectivity and strength of low potassium catalyst. The technological scheme of the present invention includes replacing Portland cement in the Fe-K-Ce-Mo-Mg-Ca catalyst system with aluminate cement and adding selecting modulation agent. The catalyst system may be used in industrial production to prepare alkyl alkynyl arene.

The invention provides a defluorinating adsorbent for drinking water, which is a composite metal oxide defluorinating adsorbent and a high polymer material playing a role of adhering absorbent particles. Absorbent powder and a high polymer binder are mixed, extruded, cut and dried to prepare into particles. The defluorinating adsorbent has the characteristics of good ion selectivity, high adsorption capacity, better strength in both dry and wet states, and no crushing or dissolving after being used for a long time.

The invention provides an arsenic-removing adsorbent for drinking water and a preparation method thereof. The adsorbent contains composite metal oxide and a polymer material binder. The arsenic-removing adsorbent has high adsorption property, high adsorption selectivity on arsenic in the drinking water, and high adsorption capacity; adsorbent particles have high strength in a dry state or in a moist state, and the adsorbent has low breakage rate of the particles and cannot be dissolved out during use; and the adsorbent is used under the conditions of long time and larger change of waterflow pressure.

The invention provides an arsenic removal adsorbent and a preparation method thereof. The adsorbent contains sulfate akaganeite and high-molecular material agglomerant. In the invention, the particles of the arsenic removal adsorbent have high adsorption property to have high adsorption selectivity to arsenic in drinking water, the adsorption capacity is high, the adsorbed particles have large strength under a drying state or a moisture state, the particle crushing rate is low during use, no adsorbent is dissolved out, and the arsenic removal adsorbent is suitable for being used for a long time and under the condition of larger water flow pressure change.

The invention provides an environment-friendly acrylate grouting material, as well as a preparation method and an application thereof. The material mainly comprises the following components in parts by weight: a main agent, namely 100 parts of methacrylic acid-beta-hydroxyethyl ester, a crosslinking agent which includes 5-30 parts of hydrophilic compound containing a diallyl ether functional group, 1-5 parts of initiator and 0.5-3 parts of accelerant, 0-20 parts of an adjuvant, and a solvent, namely 2-1,000 parts of water. The method comprises the following steps: firstly, mixing the main agent, the crosslinking agent, the accelerant, the adjuvant and a part of solvent evenly to form a solution A in use; then dissolving the initiator into a residual solvent to form a solution B; and finally mixing the solution A with the solution B evenly, and solidifying at room temperature. According to the grouting material disclosed by the invention, the technical problem that the existing organic grouting material cannot be grouted once after being mixed with an inorganic grouting material, and the technical problem that the existing grouting material has poor durability, low strength, poor water solubility, low water expansion rate and high toxicity are solved.

The invention discloses a prediction method of the crushing strength of coke for coal blending coking. The method comprises the following steps: (1) measuring coking optical textures of all single-grade coals for coking to obtain the sum L of the contents of a coarse grain embedding component, a medium grain embedding component and an incomplete fiber component in coal blending, the sum T of the contents of an isotropic component and a fine grain embedding component as well as the content X of a fiber component; (2) measuring the Gieseler fluidity of the coal blending to obtain a Gieseler plastic flow area S within the temperature range of 450-500 DEG C; (3) setting M40 to be equal to A+B*L+C*T+E*X+F*1gS, wherein M40 represents the crushing strength of the coke, the unit is percent, and A, B, C, E and F are constants; (4) calculating the predicted value of the crushing strength of the coke. According to prediction method, a coal blending coking test does not need to be carried out due to fewer influence factors and a simple predictor formula, and a coal blending scheme is better adjusted according to the predicted results, so that the practice of coal blending coking is effectively guided.

The invention discloses macroporous alumina and a preparation method thereof. The macroporous alumina of the invention has the properties that the macroporous alumina is a gamma crystalline state, thetotal porosity is 60%-85%, the macropore diameter is 100 nm-1000 nm, the proportion of macropores to the total porosity is 40%-75%, the macropores are evenly distributed and three-dimensionally penetrated, a ratio of the wall thickness to the pore diameter of the macropores is 0.7-3.0, and the side crushing strength is 8-25 N/mm. The preparation method of the macroporous alumina includes the following steps: (1) preparing aluminum sol; (2) evenly mixing inorganic aluminum salts, polyethylene glycol, the aluminum sol obtained in the step (1), organic compounds containing amide groups and a low-carbon alcohol aqueous solution; (3) adding epoxypropane and/or pyridine into the mixture obtained in the step (2), evenly mixing the mixture to obtain gel, and carrying out aging to obtain an agingproduct; and (4) immersing the aging product by using the low-carbon alcohol aqueous solution, carrying out solid-liquid separation, and drying and roasting a solid phase to obtain the macroporous alumina.

A preparation method of binderless spherical faujasite particles comprises the following steps: 1, mixing an aqueous solution of sodium silicate with a solution of a peptizing agent at -5-10DEG C to prepare a sol having a pH value of 5.0-8.0, adding the sol into an oil column in a dropwise manner to generate hydrogel beads, collecting the hydrogel beads, washing with water, ageing, drying, and roasting to prepare silica gel beads, wherein the specific surface area and pore volume of the silica gel beads, determined through a BET method, are 200-500m<2>/g and 0.6-1.5mL/g respectively, and the peptizing agent comprises an inorganic acid and an inorganic ammonium salt; 2, uniformly mixing sodium silicate, sodium metaaluminate, sodium hydroxide and water according to a molar ratio of (16-24)Na2O:Al2O3:(15-20)SiO2:(300-500)H2O, and ageing at 0-30DEG C for 10-30h to prepare a liquid phase directing agent; and 3, mixing the silica gel beads with a sodium metaaluminate solution to obtain a mixed material, ageing the mixed material at 30-60DEG C, adding the directing agent prepared in step 2 to the mixed material, heating to 90-110DEG C, crystallizing, washing obtained crystallized products with water, and drying. The method is simple to operate, and the prepared faujasite particles have a high strength and a large adsorption capacity.

The invention discloses a multi-stage processing system for crop straw and an operation method thereof, and relates to the technical field of straw processing. The multi-stage processing system for the crop straw comprises a pretreatment machine for cutting straw raw materials into strips, a crusher is arranged below the pretreatment machine, a feeding hopper close to the discharging end of the pretreatment machine is arranged at the top of the crusher, the crusher is internally provided with at least two groups of crushing mechanisms arranged from top to bottom, and the crushing mechanisms are arranged under the feeding hopper. The bottom of the crusher is connected with an extrusion processing machine, the pretreatment machine is used for cutting, the crusher is used for crushing, and the extrusion processing machine is used for extruding. The multi-stage processing system for the crop straw has the advantages that the functions are complete, use safety of equipment is high, and thequality of produced fuel is high.

The invention relates to an environment-friendly biomass composite fuel prepared from sludge garbage and a preparation method of the environment-friendly biomass composite fuel. The environment-friendly biomass composite fuel is prepared from a biomass raw material, sludge garbage, fire coal, a combustion improver, a catalyst, a desulfuration nitrogen fixing agent, a stabilizer and a dust and harm removal agent. The environment-friendly biomass composite fuel prepared from the sludge garbage has the advantages of quick ignition, strong combustion fire, long combustion resistance, full combustion, high temperature, less dust and the like; meanwhile, under the action of prepared reagents, discharge of toxic and harmful substances is effectively eliminated, and the environmental pollution is avoided; furthermore, combustion is stable and heat is uniformly distributed, so as to prevent slagging of a boiler, prolong the service life of the boiler and reduce the operation cost; particularly in a preparation process, by the combination of the component proportion of the raw materials and a preparation technology which are preferred according to an actual working condition of the boiler, the combustion performance condition can be adjusted, the boiler can realize full-load efficient operation, and the heat efficiency of the boiler and the fuel heat use efficiency are improved; the environment-friendly biomass composite fuel is applicable to being used in a civil boiler and an industrial boiler.

The invention relates to a catalyst with a hydrocarbon dehydrogenation catalysis function, a preparation method and an application of the catalyst and a hydrocarbon dehydrogenation reaction method anddiscloses the catalyst with the hydrocarbon dehydrogenation catalysis function. The catalyst contains a nanocarbon material and inorganic oxide, wherein at least part of inorganic oxide covers at least part of the surface of the nanocarbon material, the inorganic oxide contains at least one basic oxide and at least one metal oxide, the basic oxide is selected from silicon oxide, aluminum oxide and titanium oxide, and metal elements in the metal oxide are selected from group IA metal elements, group IIA metal elements and transition metal elements. The catalyst has higher crushing strength andhigher porosity and is suitable for being used as a catalyst, particularly a catalyst for a hydrocarbon dehydrogenation reaction.

The invention relates the iron bronze composite powder and preparing method. The invention adopts chemical replacement method to form metal powder with bronze coating layer on the iron powder; the tin content is 1-11%, the copper content is 9-49%, and the left is iron, The method has the advantages of saving the cost, and the product has good property and long life. The bruising strength of the product is 28kgf/mm2. The product has not leaded, so the method is not bad for environment and human.