182results about How to "Increase replacement rate" patented technology

The invention provides a construction device and construction method for a stirring and spraying expanded reinforcement pile. The construction device is characterized in that a drill pipe is formed by coaxially overlapping an outer pipe body and an inner pipe body in a sleeving mode and provided with a rotary power mechanism, a lifting device and a variable-diameter telescopic stirring arm; the inner pipe body is provided with a spiral drill bit and a spraying nozzle, and high-pressure ejection, forced stirring, improvement on the drilling speed and adjustment of the specifications of a pile body and an expanded body are realized through the operations of arm folding, arm unfolding, rotating, high-pressure grouting and the like. The construction method is characterized in that the setting parameters and design scheme of the pile body and the expanded body of the reinforcement pile are designed in advance. The method includes the particular construction steps that (1) pile positions are aligned; (2) the expanded body and the pile body of the reinforcement pile are constructed in a mode A (from top to bottom) or mode B (from bottom to top) according to the advanced design; (3) the stirring and spraying expanded reinforcement pile which accords with the advanced design and is provided with the expanded body is formed; and (4) subsequent construction is carried out through multiple methods and includes manufacturing of a reinforcement body pile body and pile end carriers and laying of a cushion layer.

The invention relates to a polyurethane foam plastic prepared by little tung oil. The biologic group polylol is prepared by epoxidation, ring cleavage, alcoholysis and addition of the tung oil, then the biologic group polylol and polyether glycol are used as basic raw materials to prepare compound materials with assistant agent; finally the compound materials are mixed evenly with blowing catalyst, then react with polyisocyanate with the yield of effervescence, thus obtaining the polyurethane foam plastic. The invention has the advantages that: 1. the little tung oil of the raw material of the biologic group polylol is renewable resource and the little tung is abundant with low cost and is unnecessary to get resources from people; 2. the preparation technique of the biologic group polylol has simple operation, good adjustability of product functionality, comparatively good property and high rate of petrified polyether glycol substation reducing dependence to petrified products; 3. the biologic degradability of polyurethane foam plastic prepared by the little tung oil and biologic group polylol is comparatively good and friendly to environment.

The invention discloses a method for preparing a lignin-based environment-friendly phenolic resin adhesive. The method comprises the following steps: 1, carrying out quantitative analysis on hydroxyl of a lignin material by using a quantitative phosphorus spectrum of nuclear magnetic resonance technology, and obtaining the quantity of active site points in unit mass of lignin material when reacting with formaldehyde by calculating the quantity of phenolic hydroxyl groups and alcoholic hydroxyl groups; 2, mixing the lignin material with phenol to form a material mixture, wherein the mass ratio of the lignin material to the phenol is (1:9)-(8:2) in the mixing process; 3, calculating the gross of formaldehyde; 4, mixing the material mixture obtained in the step 2 with formaldehyde and aqueous alkali for reaction, so as to prepare the lignin-based environment-friendly phenolic resin adhesive. The biomass refined by-product lignin is utilized at high value on the basis that the problems of expensive product and formaldehyde pollution of the traditional lignin-based phenolic resin adhesive are solved, and the method has great economic significance and social significance.

The invention discloses a CuZn bi-metal organic framework material and a preparing method thereof.The metal organic framework material ZIF-8 containing metal Zn and soluble copper salt are dissolved in a mixed solvent containing H2O, ethyl alcohol and N,N-dimethylformamide, and then 1,3,5-benzene tricarboxylic acid is added for hydrothermal crystallization, separation, washing and drying, so that the CuZn bi-metal organic framework material is obtained.Different from traditional bi-metal MOF preparing methods, the preparing method has the advantages that preparing time is short, replacement rate is high, and the crystal structure of the product varies.

The invention discloses a preparation method of a furfural-modified lignin-based phenolic resin adhesive and belongs to the technical field of the biomass energy chemical industry. According to the method, a xylose solution is prepared from biomass hemicellulose through hydrolysis under catalysis of diluted acid, furfural is prepared through dehydration of xylose under catalysis of concentrated acid, lignin is extracted under catalysis of alkali, and an alkali lignin solution is obtained; alkali lignin is subjected to phenolation modification with phenol as a phenolation reagent and alkali as a catalyst, phenol is replaced with the modified lignin in different proportions, formaldehyde is replaced with furfural in different proportions, and the lignin-based phenolic resin adhesive is prepared through collaborative copolymerization of lignin, furfural, phenol and formaldehyde. The product furfural prepared through hydrolysis and dehydration of hemicellulose is taken as a crosslinking agent, the industrial application problem that the glue strength of the adhesive is reduced due to the fact that the proportion of lignin replacing phenol is increased in the prior art is solved, and the total replacement rate of chemical products from biomass for phenol and formaldehyde from fossil resources is increased.

The invention relates to a method for preparing tellurium dioxide from tellurium slag. According to the technical scheme, the method comprises the following steps of: adding tellurium slag to sulfuric acid solution, stirring at normal temperature, adding 10% oxydol at the temperature of 30-40 DEG C, and then heating to 80-90 DEG C, and leaching under normal pressure; adding copper powder to leachate, carrying out replacement reaction at the temperature of 90-95 DEG C for 2 hours, and carrying out solid-liquid separation to obtain copper telluride slag; adding copper telluride slag to sulfuricacid solution, adding 10% oxydol, stirring at the temperature of 90 DEG C for 1 hour, and filtering; adding sodium carbonate to filtrate for neutralizing the filtrate till pH of the filtrate is 3, and filtering; adding NaOH to filter residue, carrying out alkali leaching and stirring at the temperature of 85-95 DEG C for 1 hour, and filtering; and adding H2SO4 to filtrate for neutralizing the filtrate till pH of the filtrate is 6-7, filtering, washing and drying to obtain a product. The method has the characteristics that: low-grade tellurium-containing material discarded by a copper anode mud production enterprise is used as a raw material to produce high-purity tellurium dioxide, the process is reasonable and pollution-free, and the recovery rate of tellurium is high.

The invention provides a method of reforming and exploiting a marine natural gas hydrate reservoir; the method comprises: arranging a production well in the natural gas hydrate reservoir, and an injection well in upper cap rock of the natural gas hydrate reservoir; injecting CO2 into the injection well, and stopping the injection of CO2 when the CO2 covers the upper cap rock of the natural gas hydrate reservoir; when CO2 hydrate in the deposit of the upper cap rock stops growing or after average saturation of the CO2 hydrate is greater than 30%, exploiting by means of depressurizing production; when the molar content of the CO2 in produced gas is greater than 90%, stopping exploitation, closing the production well, and completing reforming and exploiting of the marine natural gas hydrate reservoir. The method has the advantages that uncontrollable escape of natural gas and immersion of the reservoir by sea water can be prevented, water restraint effect is relieved, gas production rate is increased, and mechanical stability of a stratum is maintained.

The invention discloses modified expandable resorcinol-phenol-formaldehyde resin and a preparation method thereof. The preparation method comprises the following steps: adding lignin, phenol and a basic catalyst into a reactor for phenolate and degradation of lignin; adding a formaldehyde solution for condensation reaction with phenolated lignin and phenol; adding paraformaldehyde for further condensation reaction with the basic catalyst; adding resorcinol for condensation polymerization, so as to obtain the phenolated lignin modified expandable resorcinol-phenol-formaldehyde resin. As phenolate and degradation of lignin are carried out in advance, the phenolic hydroxyl group content of lignin is improved. Moreover, high-activity resorcinol is added, so that the prepared lignin-based phenolic resin is high in activity; a foam material made of the modified resin through solidification is high in mechanical properties, and low in scaling off rate. The compression strength of lignin modified phenolic foam is 172.1 kPa, and the bending strength of lignin modified phenolic foam is 254.6 kPa, which are respectively 10.5 percent and 22.1 percent higher than those of foam which is not added with lignin; the scaling off rate of the lignin modified phenolic foam is 19.1 percent, which is 22.8 percent lower than that of the form which is not added with lignin.

The invention relates to a preparation method of a low-grade activated coal ash composite material applied to cement and concrete. The low-grade activated coal ash composite material is prepared by taking the low-grade coal ash as a main raw material and slag, red mud, and other industrial waste residues, limestone powder and semi-hydrated gypsum as auxiliary materials through the combined action of physical milling and activating and chemical excitation. In the process of mixing concrete materials, 30% by weight of the activated coal ash composite material is used to replace PO52.5, PO42.5 or PO32.5 silicate cement; under the circumstance that other mixing materials remain the same, a great amount of cost can be saved for mixing the concrete per cube meter; the strength of the mixed concrete at all ages is equal to or higher than that of contrast concrete; the newly mixed concrete has the characteristics of high workability, low slump loss, low heat of hydration, good transitive performance of long-term strength, high resistance to sulfate attack, high chemical resistance, high durability, and the like; and the added coal ash composite material has no adverse effect on the performance of the concrete.

The invention discloses a generative fuel produced by using an industrial solid waste and a preparation method thereof. The method comprises the following steps: taking industrial solid wastes such as waste residues, oily sludge, waste paint slags, waste powdered ink, waste resin, coking blocks and the like generated in a car dismantling process as calorific value components; adding a desulfurization and dechlorination agent as an auxiliary component; evenly mixing, pressing and molding, and drying, so as to obtain the generative fuel. The heat value of the generative fuel disclosed by the invention is over 4,000kcal/kg, the generative fuel can be used as an alternative fuel for a cement plant and a power plant, and is good in inflammability, and free of any combustion improver; the burnt ash content is below 20%, the fire coal substitution rate can be up to 80%, the sulfur fixation efficiency is 69.4-80.3%, the chlorine fixation efficiency is 70.4-81.1%, the content of hazardous substances (based on S and Cl) in the combustion tail gas is reduced by 70-80%. The generative fuel and the preparation method thereof provided by the invention have outstanding environmental benefits.

The invention provides a method for preparing concrete from industrial waste residue fine aggregate, which belongs to preparation methods for concrete. According to the method, a standard mix ratio of common concrete is adjusted and fine industrial waste residue and cobblestone are used together to equivalently replace a part of fine aggregate and cement so as to improve physical and mechanical properties of concrete and reduce material cost; in mixing of concrete materials, fine industrial waste residue is used to equivalently replace 10 to 15% of fine aggregate and fine industrial waste residue and cobblestone are used together to equivalently replace 20 wt% of cement on the basis of the standard mix ratio of common concrete, other mixing materials are maintained unchanged, so cost for each cubic of concrete can be decreased by 10 to 20 Yuan, and the mixed concrete has strength equivalent to or higher than the strength of concrete prepared based on the standard mix ratio in every stage and has the characteristics of good workability, small slump loss, low heat of hydration, good later strength deferment, resistance to sulfate erosion, strong resistance to chemical attack, good durability, no unfavorable influence on concrete performance, etc.

The invention discloses a preparation method for preparing a lignin phenolic resin adhesive by using activated lignin to replace part of phenol to react with formaldehyde. The preparation method comprises the following steps: treating papermaking waste liquid with microwave and CuO, then filtering, adjusting the pH value to be about 2-3 by using hydrochloric acid, putting into a drying oven, standing for a period of time at a set temperature, filtering while the liquid is hot, washing to be neutral, and drying to obtain acidified lignin for later use; and taking the dried lignin to replace part of phenol, and performing phenolization, hydroxymethylation and phenolic reaction to prepare the lignin phenolic resin adhesive. By using the method disclosed by the invention, the replacement rate of phenol by lignin is improved, the cost is reduced, the pollution to the environment is reduced, the adhesive is high in bonding strength and low in free formaldehyde content, and various properties of the adhesive accord with national standards.

The invention discloses a preparation method of monofunctionalized nonlinear polyethylene glycol. The monofunctionalized nonlinear polyethylene glycol has a nonlinear multivalent group U, one side ofthe nonlinear multivalent group is connected with a single functional end group, and the other side of the nonlinear multivalent group is connected with at least two linear polyethylene glycol chains.The preparation method includes the steps, first, a low molecular weight intermediate IM1 is obtained first, and the single functional end group or a microvariant form is introduced; and the step only refers to an organic reaction between low molecular weight reagents, the controllability is good, the structure can be precisely controlled, selectable segregation patterns are diverse, and a high-purity intermediate can be obtained; and second, then a polyethylene glycol component is introduced, and the monofunctional nonlinear polyethylene glycol with a high substitution rate can be obtained directly or by simple chemical modification of a terminal. When the monofunctionalized nonlinear polyethylene glycol continues functionalized modification or is used as a reaction raw material to construct a multistage branched nonlinear structure, the reaction steric hindrance is small, and a relatively high substitution rate or a relatively high grafting rate can also be obtained.

The purpose of the invention is to provide a kind of construction method to reinforce foundation, we could get the compound foundation through that method quickly and simply, raise the displacement frequency of the common CFG stake consumedly through the increment the expanding parts of stake crest, to reduce the quantity of the stake, economize the engineering expenditure significantly, economize the material, simplified the construction. The construction method includes following steps:1) prepare the drill machine, helix drill a hole to the destined depth in foundation at the place of stake;2) send the water rigidity admixture filler using the pump simultaneously, simultaneously, form a body of stake through raising the drilling pole to the earth's surface;3) the form locates to the coping of stake, for the used of increment of interface of mat layer at the expanding parts of stake crest;4)Build the mat layer at the superficial of expanding parts of stake crest foundation at the peak surface and surface of groundwork.

The present invention provides a replaceable micro-surgical instrument which comprises a pull structure and a hollow tube attached to a grip. The hollow tube has a sleeve at one end with a U-type elastic element sliding in. The U-type elastic element includes a spring tension section and two opposite extending arms and the outer edge of each arm is against the inner wall of the sleeve. Two arms could move according to the pull structure to selectively extend out of the sleeve to be opened or pull back into the sleeve to be clip together. Particularly, there is a replaceable micro-surgical element set in the front-end of each arm, so when the micro-surgical element becomes blunt or broken, the doctor could only replace the micro-surgical element without replace a whole new instrument in order to reduce instrument cost, increase replacement rate, and maintain the quality of medical surgery.

The invention relates to a cement-slag powder cementing material system which adopts the desulfurization gypsum as an activator, belonging to the technical field of the building materials. The cement-slag powder cementing material system is composed of cement, slag powder and desulfurization gypsum. With the cement-slag powder cementing material system adopted, on the condition that the proportion of the slag powder is 60 percent to 90 percent, the early mechanical properties can reach the standard of the cement of P.O 42.5 grade, and the later strength develops stably. The cement-slag powder cementing material system can be used to prepare a cementing system of very high green degree, and can effectively avoid the problem that the early strength of the high-blending slag powder cementing system develops slowly, for the problem affects the process and the quality of the project. The cement-slag powder cementing material system is applicable to being used as the raw material in the commercial concrete mixing station and the commercial mortar mixing station, and is more suitable for preparing the marine concrete and the sulfate resistant mortar in the project.