40results about How to "Enhance surface alkalinity" patented technology

The invention provides a Fischer-Tropsch synthesis catalyst. The catalyst comprises a carrier and active components, wherein the carrier adopts nitrogen doped hollow carbon cage; the active componentsare distributed on the surface of the carrier; the active components belong to metallic oxide nanometer particles; metallic oxide adopts iron oxide or cobalt oxide; the carrying capacity of the metallic oxide is 5 to 51wt percent based on the percentage of metal elements to the carrier; the content of nitrogen in the nitrogen doped hollow carbon cage is 5 to 20at percent. The catalyst takes the nitrogen doped hollow carbon cage with high content of nitrogen as the carrier, nitrogen atom in the carrier has anchoring effect on the metallic oxide, the interaction between the carrier and the active components can be improved, moreover the nitrogen atom has alkalinity, the surface alkalinity of the carrier is improved, and meanwhile the Fischer-Tropsch synthesis catalyst with high selectivity,good sintering resistance and high stability is obtained through the combination of the nitrogen atom, the unique structure of the carrier and the active components.

The invention relates to a direct microwave heating modifying and microwave heating and ammonification cooperated modifying method capable of enhancing basic groups on the surface of active carbon. The modifying method mainly comprises the following steps: heating a defined amount of coal-based active carbon or ammonified coal-based active carbon under the protection of N2 and under the condition that microwave power is 300-900 W, modifying with microwave radiation time of 8-20 min, and washing and drying to obtain modified active carbon. Tests indicate that the content of the basic groups on the surface of modified active carbon prepared in different embodiments are increased from 0.079 mmol/g to 0.58 mmol/g, the content of acidic groups on the surface of modified active carbon are reduced from 1.57 mmol/g to 0.30 mmol/g, and the pH<pzc> value is increased from 6.83 to 7.97. According to the modifying method, the content of the basic groups on the surface of modified active carbon can be remarkably increased through a microwave heating method, so that the basic characteristic of the surface of active carbon is enhanced, and acid organic pollutants and nonpolar or weakly polar pollutants in a liquid phase are favorably adsorbed. The modifying method has the advantages of simplicity in operation, convenience in control, energy conservation, high efficiency, low cost and the like, and can be widely applied to the treatment of pollutants.

The invention discloses nitrogen-doped mesoporous bamboo-based charcoal and application thereof, belonging to the technical field of biomass resource utilization. In order to obtain high-strength andhigh-activity charcoal which can be directly applied, the invention provides the nitrogen-doped mesoporous bamboo-based charcoal. A preparation method for the nitrogen-doped mesoporous bamboo-based charcoal comprsies the following steps: cutting waste bamboo chopsticks into bamboo sections, and successively carrying out washing, drying and carbonizing at a high temperature to obtain a carbonized material; calcining the carbonized material at a low temperature in an oxidizing atmosphere to obtain an oxidized material; and mixing the oxidized material with a urea solution, carrying out ultrasonic impregnation, and then successively performing dehydrating, high-temperature calcination, cooling, washing and drying. According to the invention, the waste disposable bamboo chopsticks are used asprecursors, and the steps of pretreatment, carbonization, air oxidation, urea nitrogen doping and the like are carried out; and the obtained bamboo-based charcoal is directly formed tubular charcoal,and has the advantages of wide raw material sources, low price and easy availability of the raw materials, easy operation, low energy consumption, low cost, high finished product strength, high desulfurization performance and the like.

The invention provides an activation regeneration treatment process for semi-coke used for industrial flue gas dry desulfurization. The activation regeneration treatment process comprises the semi-coke. The semi-coke is successively subjected to water vapor activation, nitric acid activation and potassium hydroxide activation, so a semi-coke activation product with good sulfur dioxide adsorption performance is obtained; and the semi-coke activation product reaches the standards of flue gas adsorption, has low price, is applicable to large-range flue gas treatment, and has high environmental friendliness and economic benefits.

The invention belongs to the technical field of energy material, and particularly relates to a Fe-CNx nano composite catalyst as well as a preparation method and the application of the catalyst. The preparation method comprises the steps of firstly dipping soluble iron salt onto a molecular sieve; after that, feeding organic amine into a tube furnace, and treating by microwave heating to obtain a nitrogen-doped carbon nanotube CNx; loading iron salt onto the carbon nanotube CNx to obtain the final Fe-CNx nano composite catalyst. The preparation method is simple in technology, easy to control, wide in raw material source and low in price of raw material; the obtained Fe-CNx nano composite catalyst is good in repeatability, can be used for coal direct liquefaction hydrogenation catalytic reaction, and is capable of effectively improving the hydrogenation effect of the coal liquefaction reaction, so that the oil yield and the conversion rate of coal liquefaction are improved. Furthermore, when the catalyst is applied to the coal direct liquefaction hydrogenation catalytic reaction, microwave heating is adopted, so that the temperature of a reaction system rapidly rises, a sample is more evenly heated, the reaction time is shortened, and the reaction energy consumption is reduced.

The invention relates to an anthraquinone hydrogenation catalyst, and a preparation method and application thereof. The catalyst is prepared by the following steps: taking alumina as a carrier, compounding rare earth elements and alkali metal elements, carrying out glue forming, aging, forming and roasting, and then supporting nickel and palladium as active metals. According to the catalyst prepared by the method provided by the invention, with the introduction of the rare earth elements, the growth of alumina grains in the high-temperature treatment is inhibited, the specific surface area ofthe catalyst is increased, the dispersity of the active metals is increased, and the alkalinity of the surface of the carrier is enhanced; with the introduction of the alkali metal elements, the surface property of the carrier is improved, the distribution of the active metals and the desorption of hydrogenation products are facilitated; and the rare earth elements are diffused to the surface andare oxidized for forming oxides, and the oxides can act with nickel for forming an intermetallic compound, so that the metallicity is easy to retain, and when the catalyst is applied to an anthraquinone hydrogenation reaction, the hydrogenation efficiency is greatly improved.

The invention relates to the technical field of building materials, in particular to a reinforcing steel bar rust-prevention material applicable to the interior of concrete and application of the reinforcing steel bar rust-prevention material.The reinforcing steel bar rust-prevention material is formed by mixing solid powder and mixed liquid in proportion and can directly act on the surfaces of reinforcing steel bars inside the concrete without affecting cohesiveness between the reinforcing steel bars and the concrete.The reinforcing steel bar rust-prevention material is simple in application method, more direct in rust-prevention effect and longer in anti-rust effect, and meanwhile the material has the advantages of being great in chloridion curing capability and great in surface alkality, so that the material is greater in anti-rust capability.

The invention discloses a slope reinforcing device for construction municipal civil engineering. The slope reinforcing device for construction municipal civil engineering comprises a hollow, long and straight barrel body, wherein external threads are formed in the outer wall of the barrel body, a bearing is fixed to the upper portion of the inner wall of the barrel body, a guide rod is installed on the inner ring of the bearing in an interference manner, the guide rod and the barrel body are located on the same axis, a screw portion and a thread portion are arranged on the lower portion of the guide rod from top to bottom in sequence, gear insertion rods are installed on the two sides of the barrel body, each gear insertion rod comprises a gear end and an insertion rod end which are connected, each gear end is rotationally installed on the barrel body through a rotary shaft, and part of each gear end is located inside the barrel body and is meshed with the screw portion of the guide rod. The slope reinforcing device for construction municipal civil engineering is reasonable in structural design, and because the foldable gear insertion rods are combined with the concrete mortar in drill holes, stability is improved.

The invention provides a solvent-free and kilogram-scale preparation method for regular mesoporous phenol-formaldehyde resin. A phenolic organic compound and an aldehyde organic compound are adopted as the raw materials, a block copolymer is taken as the template, and a simple, fast and solvent-free one-step synthesis method is utilized to realize amplified preparation of mesoporous phenol-formaldehyde resin. At the same time, by optimizing the experimental parameters, laboratory gram-scale preparation is successfully expanded to kilogram-scale material preparation, and the prepared material maintains a highly regular mesoporous structure and the doping of nitrogen heteroatoms. By optimizing the structural parameters of the material, the amplification prepared material in the invention shows excellent adsorption performance (a hydrogen sulfide adsorption capacity up to 3.2-5.3mmol/g under a 0DEG C condition) in hydrogen sulfide gas adsorption performance test. The method provided by the invention is of important practical significance for realizing green and large-scale preparation of regular mesoporous phenol-formaldehyde resin and application of the resin to selective desorptionof hydrogen sulfide.

The invention belongs to the technical field of coal liquefaction, and particularly relates to a direct coal liquefaction catalytic additive, a preparation method and application of the direct coal liquefaction catalytic additive. The preparation method comprises the following steps: firstly, dipping soluble nickel salt on a molecular sieve; then treating by microwave heating in a tube furnace, meanwhile introducing a protective atmosphere and organic amine mixed gas to obtain a nitrogen-doped carbon nano-tube CNx; and then loading nickel salt on the nano-tube to finally obtain a composite catalytic additive which can be expressed as Ni/CNx. The catalytic additive has relatively high hydrogenation activity and selectivity as well as efficient microwave absorbing capability, and after a trace amount of the catalytic additive is added into coal liquefaction and hydrogenation reaction, the hydrogenation effect of coal liquefaction reaction can be effectively improved, and the conversion efficiency of coal can be improved. While in hydrogenation reaction, by adopting microwave heating, the reaction speed can be increased, and the reaction efficiency can be improved.

The invention relates to a production method of a steel slag aggregate for asphalt concrete and belongs to the technical fields of processing and production of road aggregates. The production method particularly comprises the steps of feeding, crushing, sieving and water washing. According to the production method, steel slag raw materials are subjected to second-grade crushing, three times of magnetic separation processes and five times of sieving processes so as to separate aggregates of different specifications; the surfaces of the aggregates are cleaned with high pressure water, and a five-stage settling pond is arranged to circularly utilize flushing water. According to the production method, the problems that a steel slag aggregate product produced by virtue of a traditional production process is large in specification variability, poor in angularity and high in silt content are solved, the high-efficiency production is realized, and the high-quality steel slag aggregate for the asphalt concrete is produced.

The invention provides a method for improving the organic matter adsorbing performance of activated carbon, a product prepared thereby and the application thereof. The activated carbon prepared by themethod can effectively absorb organic matters; in the preparation process of the activated carbon, a technology is simple, modification treatment to the activated carbon can be completed through adjustment of the carbonization temperature and the carbonization atmosphere, and subsequent reprocessing is not required, so that by the technological process, the cost can be greatly reduced; in the modification treatment, alkaline gas generated by a spherical polymer itself is further used as a modifier, so that reasonable utilization of energy is achieved; in a manner in which the preparation andthe modification are carried out simultaneously, microporous structures on the surface of the activated carbon can be greatly increased and the specific surface area of the activated carbon is increased; compared with a treatment method of preparing the spherical activated carbon first and then modifying, the method provided by the invention has the advantages as follows: the preparation process is simple, and the prepared activated carbon has stronger adsorption capacity and has a wide application prospect.

The invention discloses an environment-friendly slope strengthening device for municipal construction, which comprises a hollow, long and straight barrel body, wherein an external thread is arranged on the outer wall of the barrel body; a bearing is fixed at the upper part of the inner wall of the barrel body; a guide rod is mounted on the inner ring of the bearing in an interference way; the guide rod and the barrel body are located on the same axis; a spiral part and a threaded part are arranged at the lower part of the guide rod from top to bottom in sequence; gear inserted rods are mounted on two sides of the barrel body; each gear inserted rod comprises a gear end and an inserted rod end, which are connected with each other; the gear ends are rotationally mounted on the barrel body through rotating shaft; and part of each gear end is located in the barrel body and engaged with the spiral part of the guide rod. The slope strengthening device is reasonable in structural design, and can improve the stability through combination of the gear inserted rods capable of being unfolded and concrete in a dilled hole.

The invention discloses an ixeris sonchifolia hance preparation with an anti-gout effect. Through the anti-gout effect of the ixeris sonchifolia hance preparation, the clinical indication of ixeris sonchifolia hance is increased, so that the ixeris sonchifolia hance preparation not only can be used for treating a coronary heart disease, cerebral thrombosis, angina pectoris, anti-tumor and the like, but also can be used for treating a gout disease. An ixeris sonchifolia hance extract is taken orally and by injection, has an obvious effect on a hyperuricemia model induced by sodium urate in miceand is close to an allopurinol positive control group in effect. The ixeris sonchifolia hance preparation disclosed by the invention has the benefits that the ixeris sonchifolia hance preparation isa pure traditional Chinese medicine preparation, is small in toxic and/or side effects, has a cardiovascular and cerebrovascular protection effect and is an ideal anti-gout drug.

The invention belongs to the field of solid waste disposal, biogas purification and sewage treatment, and particularly relates to a preparation method of a fly ash-based adsorption material. Biomass fly ash is used as a raw material and is mixed with carapace, the mixture is crushed by a ball mill and sieved, after alkali treatment and drying, the fly ash is placed in an activation device, biogas slurry is introduced at the temperature of 600-900 DEG C for activation for 1-2 hours, and purified water and the fly ash-based adsorption material are obtained. The prepared adsorption material has good adsorption and removal effects on impurity gases such as CO2 in biogas, can purify biogas slurry in the preparation process, has the characteristics of low raw material price, simple preparation process and the like, and can realize resource utilization of fly ash and biogas slurry and efficient purification of biogas.

An iron-based Fischer-Tropsch synthesis catalyst is prepared from 20 to 30 percent of metal iron and the balance of carbon. The carbon is prepared from nano polyacrylamide, citric acid and amino acid.The preparation method of the iron-based Fischer-Tropsch synthesis catalyst comprises the following steps of: 1, formation of an iron citrate complex; 2, formation of amino acid modified nano polyacrylamide gel; 3, formation of gel loaded with iron; and 4, preparation of the iron-based Fischer-Tropsch synthesis catalyst. The iron-based Fischer-Tropsch synthesis catalyst has the characteristics ofgood sintering resistance and high stability.