408results about How to "Reduce hydration" patented technology

The invention relates to the technical field of concrete admixtures, in particular to a clay-resisting slow-release slump-retaining type polycarboxylate superplasticizer and a preparation method thereof. With polyether macromonomers, unsaturated carboxylic acid, unsaturated carboxylic ester, dibasic acid anhydride, a crosslinking agent, amide monomers, unsaturated phosphate ester, phosphate, an oxidizing agent , a reducing agent, a chain transfer agent, a neutralizing agent and water as raw materials, the clay-resisting slow-release slump-retaining type polycarboxylate superplasticizer is synthesized at normal temperature. Ester groups, amide groups and phosphate ester are introduced into the molecular structure of the polycarboxylate superplasticizer, and light crosslinking of the polycarboxylate superplasticizer is realized through the long-chain ester crosslinking agent, so that the superplasticizer has a good clay-resisting and slump-retaining effect and has the advantages of low mixing amount, high water reducing rate, high adaptability to clay-containing sand, good slump retaining performance and the like; besides, only normal-temperature polymerization is needed, the processis simple, the production cost is low, and the superplasticizer is suitable for industrial production.

The invention belongs to the field of graphene oxide films, and provides a controllable-interlamellar-spacing stable graphene oxide film which is prepared by accumulating partially reduced graphene oxide lamellae layer by layer or accumulating lamellae composed of graphene oxide and partially reduced graphene oxide layer by layer. The preparation method comprises the following steps: (1) uniformly dispersing the partially reduced graphene oxide in water, or uniformly dispersing the graphene oxide and partially reduced graphene oxide in water to form a film casting solution; and (2) filtering the film casting solution through a substrate film to form a wet-state graphene oxide film on the substrate film, putting the wet-state graphene oxide film together with the substrate film in a drying plant, drying, and peeling the graphene oxide film off the substrate film. The method can enhance the stability of the graphene oxide film in the water, acid solution or alkali solution on the premise of not blocking the interlamellar transmission channels of the graphene oxide film or destroying the accumulated lamellar structure.

The disclosure relates to a method of delaying viscosification of a well treatment fluid within a well or within a subterranean formation penetrated by a well by introducing into the well a hydratable viscosifying agent of particulates having a minimum of 40% retention on a 60 mesh screen and a minimum of 1% retention on a 20 mesh screen.

The invention discloses a method for preparing a slow-release high-adaptability polyester polycarboxylic acid water-reducing agent. According to the method, a slow-release positive-negative non-ionic mud-resistant polyester polycarboxylic acid water-reducing agent product is synthesized by utilizing a high-molecular structural design principle. The invention also discloses the slow-release high-adaptability polyester polycarboxylic acid water-reducing agent prepared through the method and an application of the slow-release high-adaptability polyester polycarboxylic acid water-reducing agent in concrete. Compared with the prior art, the slow-release high-adaptability polyester polycarboxylic acid water-reducing agent disclosed by the invention has the advantages that the molecular structure of the product contains an ester group and an amide group which are unstable in a cement strong-alkali environment, positive amine ions generated by hydrolyzing the amide group achieve a sealing effect on mud carried with negative charges so that the mud-resistant effect is achieved, the thickening effect is achieved on cement mortar, and the hydration of cement particles is postponed. The slow-release high-adaptability polyester polycarboxylic acid water-reducing agent disclosed by the invention has the advantages of high water-reducing rate, good slump ageing stability, high tolerance on the mud and good adaptability on coal ash, fine ore, stone powder, clays and the like.

The invention relates to a colloid lead-acid storage battery cathode lead plaster for an electric power assisted vehicle and a preparation method, aiming to improve the 2hr capacity and the low-temperature capacity at -15 DEG C of a storage battery and prolong the service life. Raw materials of the lead plaster contain the following substances in parts by weight: 100 parts of lead powder, 0.03-0.06 part of fiber, 0.1-0.5 part of acetylene carbon black, 1.0-1.3 part of barium sulfate, 0.1-0.2 part of sodium lignosulphonate, 0.1-0.3 part of humic acid and 0.1-0.3 part of polyethylene glycol. Proved by repeated research trials, the lead plaster integrates the characteristics of strong low-temperature capacity of the sodium lignosulphonate and strong charge receptivity of the humic acid; meanwhile, the use of a colloid electrolyte is considered, and the polyethylene glycol is added to the lead plaster raw materials; through tests, the optimal proportions of all raw material components are determined so as to form a novel cathode mixed organic expanding agent, thereby the 2hr capacity, the low-temperature capacity at -15 DEG C, the cycle life, the charge receptivity and the water retention capacity of the storage battery are guaranteed, and the problem of low-temperature property attenuation of the sodium lignosulphonate is solved.

The invention relates to a pre-mixed and water-permeable concrete admixture and water-permeable concrete. The pre-mixed and water-permeable concrete admixture is formed by mixing of the following components in percentage by weight: 10-20% of a water reducing component, 1-5% of a hydration regulating and controlling component, 0.1-1.0% of a viscosity regulating component, 0.5-5% of a water evaporation inhibiting component, 0.5-3% of a thixotropic agent component, and the balance of water. The pre-mixed and water-permeable concrete admixture provided in the invention can effectively improve work conditions of the water-permeable concrete, greatly improve the cohesiveness and the uniformity of slurry wrapping aggregate surfaces, and can effectively prolong the operable time of the water-permeable concrete, meet the requirements of pre-mixing production, long-distance transportation and long-time construction of the water-permeable concrete, and improve the control of production and construction quality of the water-permeable concrete.

The invention discloses a thermal-insulation closed cooling system for a data center. The thermal-insulation closed cooling system is characterized in that a thermal-insulation closed evaporative cooling tower, a water-cooling water chilling unit and a data center air conditioning terminal are connected through valves, and control system controls the valves to achieve switching among a water chilling unit cooling mode, a natural cooling mode and a preset cooling mode; in the water chilling unit cooling mode, the water-cooling water chilling unit is used as the cold source to cool the data center air conditioning terminal; in the natural cooling mode, the thermal-insulation closed evaporative cooling tower is used as the cold source to cool the data center air conditioning terminal; in thepreset cooling mode, the thermal-insulation closed evaporative cooling tower and the water-cooling water chilling unit are in series operation, and water discharged from the thermal-insulation closedevaporative cooling tower is further cooled in the evaporator of the water chilling unit and then used to cool the data center air conditioning terminal. The thermal-insulation closed cooling system has the advantages that the preset cooling mode is added to the system, the thermal-insulation closed evaporative cooling tower and the water-cooling water chilling unit are in series operation in thepreset cooling mode, the operation time of the water chilling unit is shortened greatly, and power consumption is lowered greatly.

The invention provides a preparation method of a polycarboxylic acid water reducing agent containing a phosphate group. The preparation method comprises the following steps: firstly, preparing a terminal alkenyl unsaturated phosphonic acid monomer; secondly, mixing acrylic acid, the unsaturated phosphonic acid monomer, a chain transferring agent and de-ionized water to prepare a mixed monomer solution; by taking an alkenyl polyoxyethylene ether macro-monomer solution as a base material, dropwise adding an initiator water solution and the mixed monomer solution respectively under a room-temperature polymerization condition; uniformly stirring, dropwise adding and reacting; and finally neutralizing with a sodium hydroxide solution to obtain the polycarboxylic acid water reducing agent. According to the water reducing agent, the terminal alkenyl unsaturated phosphonic acid monomer is introduced into a structure and primary adsorption is facilitated; the initial dispersity is improved, and hydration and agglomeration of cement are delayed; the slump retaining property is effectively improved and the sensitivity to concrete is reduced; and the stress resistance and adaptability on different aggregate are enhanced.

The invention discloses a concrete brick with high water permeability. The concrete brick is prepared from raw materials in parts by weight as follows: 120-200 parts of cement, 250-300 parts of gravel, 10-35 parts of ardealite, 10-50 parts of slag, 10-50 parts of steel slag, 200-350 parts of river sand, 20-50 parts of fly ash, 5-20 parts of silica fume, 10-35 parts of sintered magnesia, 2-15 parts of metakaolin, 10-40 parts of mixed fiber, 5-38 parts of straw powder, 3-8 parts of a water reducer, 0.1-0.5 parts of ethylene diamine tetra (methylene phosphonic acid) sodium and 20-50 parts of water. The concrete brick with high water permeability has very high compressive strength and excellent water permeability and can meet the use requirement of multiple fields.

The invention discloses a method for preparing a large-admixture-amount wet-milled phosphorus solid waste super-retarding cementing material. The method comprises the following steps: putting phosphorus slag and desulfurized fly ash into a wet-milling machine, and performing mixing and wet milling so as to obtain mixed slurry A; grinding caustic dross, ardealite and coal ash in a dry-milling machine so as to obtain a mixed powder material B; and mixing the mixed slurry A with the mixed powder material B so as to obtain a mixed material C, adding cement, a water reduction agent, a retarder, tailing sand and macadam into the mixed material C, and performing stirring for 4 minutes, so as to obtain super-retarding concrete. Wastes such as the phosphorus slag, desulfurized fly ash, caustic dross, ardealite, coal ash and tailings are adopted to prepare concrete, wastes are turned into wealth, and the amount of cement can be also reduced; due to a mixed wet-milling mode of the phosphorus slagand the desulfurized fly ash, phosphorus dissolution of the phosphorus slag can be promoted, the initial setting time and the final setting time of the concrete can be greatly prolonged, early-stagehydration heat can be reduced, cracks can be reduced, later strength can be ensured, and large-admixture-amount efficient application of the phosphorus slag can be achieved; and the prepared super-retarding concrete can be applied to large-size concrete, drilling bitten piles, and the like.

The invention relates to a modified naphthalene water reducer preparation method, and belongs to the field of concrete admixture. The preparation method includes the steps: (1) preparing copolycondensation monomer from unsaturated dicarboxylic acid, styrene and acrylic acid hydroxyalkyl ester under the action of sodium hypophosphite and initiator; (2) preparing a modified naphthalene water reducer from naphthalene homolog, the copolycondensation monomer, concentrated sulfuric acid, phosphoric acid, formaldehyde and the like by the stages of sulfonation, hydrolysis, condensation and neutralization. A large quantity of carboxyl, hydroxy and phosphate are led into the molecular structure of the water reducer, high water reducing rate of the naphthalene water reducer is kept, hydration of cement can be delayed, the slump retention ability of concrete is improved, the concrete has high flowability after 2 hours, and transportation and construction are facilitated. The preparation method is simple in preparation process, convenient to use, good in effect and high in practicability.

The invention discloses a cooling system combining natural cooling units and air-cooled water chilling units and applied to a data center computer room. According to the system, the natural cooling units and the air-cooled water chilling units are arranged independently and connected in series in the whole air-conditioning water system, and different operation modes are adopted to supply cold water meeting design parameter requirements to a tail-end air conditioning device at different outdoor temperatures. The system is mainly characterized in that when the outdoor temperature is lower in winter and transition seasons, the natural cooling units with low energy consumption, instead of the air-cooled water chilling units with high energy consumption, use outdoor natural cold sources to refrigerate the system, an energy-saving effect is realized, and the PUE (power usage effectiveness) value of a data center is reduced. Besides, the system adopts a closed circulating system, is not affected by the drift rate, consumes very little water, is suitable for a water-deficient area and has the water saving function, so that the system is convenient and reliable to operate, adopts intelligent control and is energy-saving and environment-friendly.

The invention provides an environment-friendly inorganic soil solidification additive which comprises, by mass, 15-65% of sulfate, 15-65% of halide salt, 11-40% of phosphate, 5-30% of silicate, 0-25% of carbonate, 0-18% of basic oxide and 0-10% of lignosulfonate. The environment-friendly inorganic soil solidification additive is characterized in that all components in soil directly or indirectly undergo soil particle surface chemical modification and modification of substances among soil particles, and generation of colloidal gel materials and generation of various materials of crystal structures are promoted. As time goes, hardened skeletons such as ettringite needle-shaped crystals and apatite crystals appear gradually in solidified soil, soil solidification compressive strength, hydrophobicity, water permeability, stability of heavy metal and other harmful materials and other physical and chemical solidification effects are good, and the environment-friendly inorganic soil solidification additive can adapt to various climates, geographies and soil properties and is high in compatibility and obvious in stabilization and solidification effect on heavy metal and other harmful materials.

The invention provides a modified calcium oxide expansion agent for cement concrete. The modified calcium oxide expansion agent for the cement concrete has the specific surface area of 100-600m<2>/kg and is prepared from a degradable high polymer and calcium oxide expansion clinker. According to the modified calcium oxide expansion agent for the cement concrete, provided by the invention, the invalid hydration of calcium oxide at a plastic stage of concrete is reduced, the hardened expansion quantity is increased, and the shelf life of the product can be further prolonged; the expansion agent can be applied to the crack resisting and seepage prevention of a concrete structure and can be used for greatly improving the durability of the concrete.

A sustained release pharmaceutical formulation comprising torsemide or pharmaceutically acceptable salt thereof.

The invention provides an amide polymer shale inhibitor for drilling fluid. The amide polymer shale inhibitor is characterized by being prepared from, by mass, 10%-20% of acrylamide, 5%-10% of 300# liquid wax, 10%-20% of hexadecyl dimethyl benzyl ammonium chloride, 2%-8% of dimethyl diallyl ammonium chloride, 20%-30% of methacryloyloxyethyl trimethyl ammonium chloride, 15%-25% of acrylic acid, 2%-5% of emulsifiers, 0.03%-0.6% of an initiator and 20%-40% of water, wherein the emulsifiers are any two of Span60, Tween80, Span80, Tween60 and hexadecyl trimethyl ammonium bromide, and the initiator is any one of ammonium persulfate-ethanol, ammonium persulfate-pentaerythritol, ammonium persulfate-sodium hydrogen sulfite and ammonium persulfate-sodium sulfite. By means of a synergistic effect of chemical inhibiting and enveloping and blocking of hydrophobic groups, the good inhibition effects can be achieved, integral inhibition is achieved, and the problem that an original shale inhibitor is bad in inhibition effect under the complex condition is solved.

A magneto-electric dialysis process for desalinating seawater, preparing salt from seawater and desalting industrial water is characterized by that on the basis is existing electric dialysis equipment, a static magnetic field is additionally used to directionally shift the cations and anions in flowing solution. Its apparatus is composed of a casing with different water inlets and outlets and electrodes, a group of cationic exchange membranes and anionic exchange membranes, which are alternatively arranged between anode and cathode, and a permanent magnet attached to each wall of the casing. Its advantages are high throughput, less electric consumption and not scaling.

The invention discloses a device and a method realizing synergic effects of waste heat utilization, desulfurization wastewater zero-emission and smoke plume removal, the device comprises a boiler, anair preheater, a dust remover, a desulfurization tower and a chimney which are sequentially connected through a pipeline, a wastewater sedimentation tank, a wastewater concentration tower and a wastewater flashing tower simultaneously are connected to corresponding equipment in the device, a high-temperature gas required in the working process of the wastewater flashing tower and the wastewater concentration tower is taken from high-temperature flue gas during the operation of the device; and generated gases are sent into the dust remover for dust removal circulation. An acoustic wave agglomeration device and a demister are disposed in a connecting pipe between the desulfurization tower and the chimney. The method comprises the steps of concentrating and flashing the high temperature fluegas in the process of operation of the desulfurization wastewater utilization device, and finally feeding the concentrated and flashed gas to the device for circulation, thereby achieving zero emission, discharged smoke plume can be reduced by use of synergic effects of the reduced flue gas temperature, the acoustic wave agglomeration device and the demister, and the goal of energy saving and environmental protection, wastewater zero-emission and exhaust emission reduction can be comprehensively realized.

The water treating magnetoelectric dialysis process may be used in sea water desalting, salted water desalting, sea water concentration to produce salt, desalting industrial water, etc. Ion exchange membrane with selective penetration is utilized in establishing a water processing electric dialysis space, where electrolyte ion is made to migrate directionally in the DC electric field. The present invention features that in the electric dialysis space, one static magnetic field is applied, which has magnetic force line direction perpendicular to the water flow direction and the current direction to strengthen the directional migration of anion and cation in the flowing solution. The present invention is superior to available electric dialyser with small water processing amount, great power consumption, easy scaling and other demerits. The present invention is realized simply through applying two permanent magnets onto two opposite walls of the electric dialyser casing.

The invention discloses a plugging agent for environment-friendly water-based drilling fluid and a preparation method of the plugging agent. A product is obtained from a reaction of, by weight, 30-50 parts of carbon balls coated with AlOOH, 10-20 parts of acrylamide, 10-20 parts of N-isopropylacrylamide and 2-4 parts of hexamethylenetetramine under the action of 0.01-0.05 part of initiator, and the plugging agent for the environment-friendly water-based drilling fluid is obtained by mixing the product and 30-50 parts of vinyl acetate-ethylene copolymer emulsion under the action of 2-5 parts of dispersant. The plugging agent for the environment-friendly water-based drilling fluid has the advantages of good plugging effect, no toxic effect, certain compressive strength, high temperature-resistance capability and good compatibility with the drilling fluid.