48results about How to "High lateral compressive strength" patented technology

The invention relates to a catalyst for preparing maleic anhydride from n-butane through oxidation. The catalyst mainly overcomes the problem of low catalytic activity in the prior art. According to the invention, three elements consisting of vanadium, phosphorus and oxygen are used as the main body of the catalyst, and a certain amount of a metal additive is cooperatively used. The catalyst comprises, by weight, 26 to 35% of elemental vanadium, 14 to 20% of elemental phosphorus, 30 to 50% of elemental oxygen and 0.02 to 7% of the metal additive. The catalyst is subjected to constant-temperature constant-humidity treatment, doping of a pore forming agent and secondary molding, so the catalysis performance and strength of the catalyst are improved, and the catalyst is applicable to the field of preparation of maleic anhydride from n-butane through oxidation.

The invention discloses a preparation technology of a catalyst used for high temperature catalytic decomposition of N2O. The preparation technology comprises the following steps: dissolving magnesium nitrate, cobalt nitrate, lanthanum nitrate, cerium nitrate, nickel nitrate and zirconium nitrate in water to form a mixed nitrate solution; adding ammonia water and aluminum hydroxide, and carrying out compacting, dehydrating, drying and baking to obtain a powder material; and uniformly rolling the powder material, desalinized water and a bonding agent, drying the rolled materials to obtain a granulation material, compacting the granulation material to form a porous cylinder, and calcining the porous cylinder to obtain the catalyst. The preparation technology has the following advantages: a co-precipitation method is selected, an active component reacts with a carrier substance precursor and a precipitating agent to realize co-precipitation, and the active component interacts with the carrier, so the active component is well and stably dispersed; and the active component and the carrier precipitate are commonly calcined at a high temperature of 1000-1300 DEG C, so the active component of the catalyst has good heat tolerance and difficulty loses, thereby the catalyst has the advantages of high efficiency, good stability and long service life.

The present invention relates to a dephophorization agent and a preparation method thereof. According to the invention, inorganic bentonite is used as a carrier, and one of metallic oxides such as iron, nickel, manganese, zinc, copper, and cerium is used as an active component with alkali metal oxide and alkaline earth metal oxide as auxiliary components, wherein the mass percentage of each component is as following: 5 to 20 percent of active component, 10 to 40 percent of alkaline earth metal oxide, 10 to 25 percent of alkali metal oxide, and the balance of inorganic bentonite. The preparation method provided by the invention includes the following steps: first, adding ammonia water to the active component of soluble metal salt for deposition, and a suspension liquid of the metal is obtained through pulping by adding water; then, adding proportional amounts of calcium oxide, sodium carbonate or sodium bicarbonate as well as bentonite and grinding the mix into a paste, leaving the paste for four hours; drying the paste after molding the paste into a bar, and roasting the same for two hours at the temperature of 300 DEG C to 400 DEG C, then a dephosphorization agent is obtained. The dephosphorization agent is of high strength, and is applicable for desorption of PH3 with low temperature and high phosphorus capacity.

The invention relates to a preparation method of a TiO2/gamma-Al2O3 composite carrier material. The method includes uniformly mixing mesoporous TiO2 crystal whisker and alumina sol, with the weight percent of the mesoporous TiO2 crystal whisker being 2-50 wt% and the weight ratio of dry mixing materials to water being 1:5-20; heating the material mixture to 60-90 DEG C, adding dropwise an inorganic acid to adjust the pH to be 2-3.5 and maintaining for 2-24 h; adding dropwise an alkaline solution to adjust the pH to be 9 to form Ti-Al-H2O composite jelly; ageing for 1-6 h, washing with deionized water to be neutral, filtering and drying in air; and calcining at 500-800 DEG C to obtain the TiO2/gamma-Al2O3 composite carrier material. The method is simple in operation and low in cost. A molybdenum-nickel catalyst prepared from the carrier has excellent deep hydrodesulfurization performance, and is capable of reducing the sulfur content from 5000 [mu]g/g in inferior diesel oil to below 50 [mu]g/g, thus achieving the Europe IV diesel oil standard.

The invention relates to a diesel hydro-refining catalyst and a preparation method thereof. The catalyst is composed of an active component nickel-molybdenum metal oxide, a composite dispersion medium silicon dioxide and aluminum trioxide, and an organic salt mixture. The method is a deposition sedimentation method. According to the method, metal salts of nickel, molybdenum, silicon and aluminum are added into water according to a certain ratio, and a homogenous transparent SiO2-gamma-Al2O3 gel is formed through a sol-gel process; with the decomposition of urea, the pH value increases; a reaction of Ni and Mo is carried out under an alkaline condition, such that an Ni-Mo composition is produced and is deposited on the surface of SiO2-gamma-Al2O3; and steps such as filtering, drying, roasting are carried out, such that the bulk catalyst with relatively high dispersion activity is obtained. The catalyst has the advantages of high active component content, uniform active component dispersion, large specific surface area, and high catalytic activity. The catalyst can be used for producing clean diesel with ultralow sulfur content.

The invention provides a gaseous phase dechlorinating agent. The gaseous phase dechlorinating agent is prepared from the following components in percentage by weight: 15 to 30 weight percent of calcium carbonate, 10 to 35 weight percent of magnesium carbonate, 7.2 to 10.8 weight percent of calcium oxide and 48 to 65 weight percent of aluminate cement. According to the dechlorinating agent provided by the invention, by using the characteristic that the calcium carbonate and the magnesium carbonate are used to generate a regular sandwich structure, chlorine is adsorbed more favorably, the dechlorinating activity is improved, and the breakthrough chlorine content of the dechlorinating agent at 300DEG C is as high as 55 percent; in addition, the strength can be improved, and the side pressure strength of the dechlorinating agent when clay is not used is as high as 110N/cm, so that the clay is prevented from being used and further the sintering of the dechlorinating agent is effectively prevented; meanwhile, by using high hygroscopicity of calcium oxide, the calcium oxide absorbs water and is converted into calcium hydroxide with higher alkalinity, so that the absorbing ability for hydrogen chloride is promoted, the dechlorinating precision is improved, the desorption of chlorine from the dechlorinating agent is hindered, the condition that water and metal chloride generated by chlorine absorption of the dechlorinating agent generate a coordination reaction is prevented, the damage to a dechlorinating agent structure and the blockage of an internal pore canal are avoided, and the chlorine capacity of the dechlorinating agent is effectively improved.

Disclosed is a triangular oblique surface type splash-proof denoising device. A partition board and a triangular corrugated plate are arranged in a spaced mode, triangular water cavities are evenly distributed between the partition board and the triangular corrugated plate, the inclination angle between the mass axis of each triangular water cavity and the horizontal plane is 45-75 degrees, and pattern drafts exist at the two ends of each triangular water cavity, so that bidirectional core pulling compression molding is facilitated. The design of the triangular water cavities enables lateral compressive strength to be improved, and denoising during water drop falling is facilitated. Compared with the prior art, the device has the advantages that lateral compressive strength is high, deformation is avoided in use, the splash-proof effect is unchanged, and noise can be reduced by 12-13 decibels. Compared with the sheet type partition board and triangular corrugated plate bonding scheme, the device has the advantages that manufacturing efficiency is improved by 35 times, product quality is stable, reliability is high, the device can be installed and detached conveniently in a cooling tower, installation is stable and reliable, and sliding and falling of a repeatedly bent type stacked splash-proof denoising device during installation and use are avoided.

The invention relates to a method for solidifying and stabilizing sludge. The ratio of the added amount of cement to the mass of sludge is 0.25, and the ratio of the added amount of sepiolite to the mass of sludge is 0.05-0.30; the sepiolite, cement and sludge are mixed and stirred uniformly and conserved for 28 days. According to the method, sepiolite is used as an additive which is uniformly mixed with residual sludge and cement after mechanical dehydration at certain proportion so as to solidify and stabilize the sludge. Experiments indicate that after adding the sepiolite and conserving the sludge solidified body based on cement solidification for 28 days, the no-lateral confinement compressive strength is greater than or equal to 50-100kPa, the lateral pressure resistance is greatly enhanced, the leaching rate of harmful substances in the sludge is greatly reduced, the sludge solidifying and stabilizing cost is greatly lowered, and the capacity increasing ratio is greatly reduced.

The invention relates to a catalyst for preparing maleic anhydride from n-butane through oxidation. The catalyst mainly overcomes the problem of low catalytic activity in the prior art. According to the invention, three elements consisting of vanadium, phosphorus and oxygen are used as the main body of the catalyst, and a certain amount of a metal additive is cooperatively used. The catalyst comprises, by weight, 22 to 35% of elemental vanadium, 12 to 22% of elemental phosphorus, 35 to 55% of elemental oxygen and 0.01 to 8% of the metal additive. The catalyst is subjected to constant-temperature constant-humidity treatment, doping of a pore forming agent and secondary molding, so the catalysis performance and strength of the catalyst are improved, and the catalyst is applicable to the field of preparation of maleic anhydride from n-butane through oxidation.

The invention belongs to the technical field of aviation composite material manufacturing, and discloses a honeycomb stabilization method for forming a large-thickness and large-size honeycomb sandwich structure, for a large-thickness honeycomb, when a local stabilization process is adopted, the lateral pressure resistance of the large-thickness honeycomb is enhanced, the overall rigidity is reduced, the stabilized honeycomb keeps certain deformation capacity, and the stability of the large-thickness honeycomb is improved. When a large-thickness honeycomb sandwich structure is formed, the deviation between a honeycomb and a theoretical molded surface of the honeycomb is reduced through honeycomb deformation, so that enough forming pressure is applied to a mold surface skin of the honeycomb sandwich structure. The method solves the problems that the rigidity of a large-thickness and large-size honeycomb is increased after the side pressure resistance of the large-thickness and large-size honeycomb is increased, the edge of the formed honeycomb sandwich structure is whitened due to edge upwarp, namely the porosity is increased due to insufficient pressurization of the film pasting surface of the area, the preparation process level of the large-thickness and large-size honeycomb sandwich structure is improved, and a large practical application value is achieved.

The invention belongs to the technical field of sulfur recovery, and particularly relates to a hydrogen sulfide selective oxidation catalyst and a preparation method thereof, wherein the raw materialsof the carrier comprise metatitanic acid, silica powder and calcium silicate, iron oxide and calcium oxide are used as active components, and the silica powder is fumed silica powder having a specific surface area of 40-60 m<2>/g. According to the present invention, by using the carrier of the invention, the catalyst can have a suitable pore structure, the Claus reverse reaction of the catalyst at the selective oxidation stage can be avoided, and the sensitivity of the catalyst to water vapor and the oxygen content can be reduced; the catalyst has characteristics of high activity, insensitivity to water vapor and oxygen content in the process gas, high side pressure and high H2S conversion rate; and by using the catalyst, the hydrogen sulfide conversion rate can reach more than 95%, the sulfur yield can reach more than 90%, and the side pressure strength can reach more than 120 N/cm so as to improve the sulfur recovery rate of the sulfur recovery device and achieve the significant economic and social benefits.

The invention discloses a high mechanical strength optical cable, comprising an outer sheath (1), a support member arranged inside the outer sheath (1), and an inner sheath (4) arranged between the outer sheath (1) and the support member , Several optical fiber protective sleeves (5) arranged in the inner sheath (4) and optical fibers (6) arranged in the optical fiber protective sleeve (5), and an armor layer ( 3). The beneficial effects of the present invention are: the present invention can divide the interior of the sheath into multiple regions by providing a support in the outer sheath, so as to facilitate the installation of multiple groups of optical cables, make the optical cables easy to branch, and can also play a supporting role, improving The compression resistance and bending resistance of the present invention improve the mechanical strength of the optical cable, and the mechanical strength of the present invention can be increased by setting the armor layer, which is beneficial to prevent the deformation of the inner sheath from compressing the optical fiber, thereby protecting the optical fiber, and It is also possible to improve the pressure resistance of the present invention.

The present invention relates to a method for supplementing oxygen into hydrocarbon oil. Said method is characterized by that in the hydrocarbon oil a liquid oxygen-supplementing agent using tert-butyl hydroperoxide as effective component can be added, and in the flowing process the tert-butyl hydroperoxide in the oxygen-supplementing agent can be dissolved in the hydrocarbon oil, and when the hydrocarbon oil in which the tert-butyl hydroperoxide is dissolved in passed through the catalyst bed layer which is placed in the fixed bed reactor and has catalytic property of decomposing tert-butyl hydroperoxide, under the action of catalyst the tert-butyl hydroperoxide in the hydrocarbon oil can be decomposed, and can release out nascent active oxygen. The active component or said catalyst is compound of manganese.

The movable flood-fighting retaining dam comprises guide rail protection rods, a guide rail frame, a water baffle, a guide rail support and a steel wire rope, the water baffle is of a V-shaped structure, and the guide rail frame is provided with an insertion opening so that mounting and dismounting can be convenient. The structure is simple, on the basis that flood fighting and water retaining are met, mounting and dismounting are easy and fast, the construction time of the retaining dam is shortened, and life and property losses caused by flood are reduced.

A metal lattice plate is characterized by comprising a lattice plate (1). The lattice plate (1) comprises an upper panel (2) and a lower panel (3), which are integrated by lattice cores (4) comprisinga plurality of vertically arranged warp-wise stringers (6) and horizontally arranged weft-wise stringers (5); and the warp-wise stringers (6) and the weft-wise stringers (5) are clamped and connectedto each other. Compared with a conventional connection mode, the provided metal lattice plate has the advantages that the discontinuity of the core structure in the lattice plate will not appear on asame end face, the anti-shearing performance of the lattice plate in the joints is improved; the joint welds of two lattice plates are all arranged in the cores of two lattice plates, the stability of the connection structure is improved, the core-free weld of a panel is avoided, and the mechanical properties of the lattice plate are improved.