440 results about "Dissolution reaction" patented technology

The invention relates to a method for producing an aluminum polychlorid water purifying agent from waste hydrochloric acid and aluminum ash. The method comprises the following steps: carrying out dissolving reaction on the solid waste aluminum ash produced in an aluminum electrolysis process and waste hydrochloric acid produced in a resource utilization process of high-aluminum coal ash, so as to obtain an aluminum-containing solution; adding alkaline salt or alkali into the aluminum-containing solution, and carrying out polymerization reaction, so as to obtain a primary product; and ageing the primary product, so as to obtain an aluminum polychlorid liquid product. By utilizing the method, the problems of solid waste pollution and wastewater emission can be solved, and the aluminum polychlorid product meeting the index requirements of national standard (GB15892-2009) can be prepared; and the method has good economic and social values.

The invention provides a fracture sliding sleeve with a dissoluble ball seat and a fracturing method. The fracture sliding sleeve comprises an upper connector, an outer barrel connected to the lower end of the upper connector, an inner barrel sleeved with the inner side of the outer side in an axial moving mode and the ball seat sleeved with the inner side of the inner barrel, a liquid passing hole is formed in the side wall of the outer barrel in a penetrating mode, and the lower end of the outer barrel is connected with a lower connector. The inner barrel axially moves to open or close the liquid passing hole. An annular boss is arranged on the outer wall of the ball seat in the circumferential direction, and the ball seat is made of magnalium, and can be dissolved in mineral water. According to the fracturing method, a fracturing ball is thrown into a well and pressed, the annular boss of the ball seat is shorn off, a ceramic anticorrosion layer is damaged, the ball seat drives the inner barrel to move downwards, the sliding sleeve is opened, fracturing is executed, and the magnalium of the annular boss of the ball seat and formation water are in contact to generate a dissolution reaction. After the fracturing construction is completed for a period of time, the ball seat is dissolved completely, the inner diameter of the sliding sleeve is identical to that of a sleeve pipe, the full diameter of a completion pipe string is fractured, and downhole tools can be tripped into the well bottom without obstacles.

A method for quantitative determination of the permeability and porosity evolution of a porous medium during diagenesis having application to oil reservoir development is disclosed. A diagenesis scenario and an initial structure of the pore network of the porous medium are defined.

A representation of the pore network is constructed by a PNM model. The steps of the diagenesis scenario are determining the ion concentration on the pore and channel walls of the PNM model, for a precipitation or dissolution reaction according to the scenario, and deducing therefrom a geometry variation of the PNM model, the porosity is calculated geometrically and the permeability is calculated from Darcy's law for the modified PNM model; the foregoing steps are repeated according to the diagenesis scenario and a relationship is deduced between the permeability of the porous medium and the porosity of the porous medium during diagenesis.

A method of preparing the 2, 2'-dithiocarbamate dibenzo thiazole based on the oxygen method of the 2-mercaptan benzothiazole ammonia salt is characterized in that the 2-mercaptan benzothiazole is added with ammonia or a compound for the dissolution reaction; the compound can produce the ammonia with the existence of water; in the dissolution process, the solution is heated and stirred; the solution of the ammonia salt is filtered after the dissolution; the catalyst is added; the air or oxygen is added under the condition with a certain temperature and pressure for the reaction of a certain period; the suspension produced after the reaction is pumped and filtered to get the filter cake; the filter cake is washes by water, dried and cracked to get the product 2, 2'-dithiocarbamate dibenzo thiazole; the filtered solution after being pumped and filtered and water for the washing process can return to the container to be used as the solvent for the cycling use after being supplemented with ammonia. The method has no wastewater and exhaust emission in the whole production process.

The invention discloses a method for preparing silico-calcium fertilizer by pre-desiliconizing with high alumina fly ash, relating to the technical field of environmental mineral and material and chemistry. The method comprises the steps as follows: adding raw material high alumina fly ash into sodium hydroxide solution for alkali dissolution reaction; 2. filtering and separating the sodium silicate solution generated by the alkali dissolution reaction, desiliconizing the filter cake and taking the fly ash as the ingredient for extracting aluminium oxide; 3. adding lime cream to the filtered and separated sodium silicate solution for precipitation reaction followed by filtering and separating, obtaining the filter cake as calcium silicate, the filtrate as sodium hydroxide solution which can be recycled for the step 1; and 4. drying and milling the filter cake calcium silicate to prepare silico-calcium fertilizer product. In the invention, high alumina fly ash and alkali reaction are employed for dissolving amorphous state silicon dioxide out of the fly ash so as to prepare the silico-calcium fertilizer, thus having the characteristics of simple process, small material consumption, small energy consumption and low cost.

The invention specifically relates to a negative plate of a lithium ion battery, a diaphragm and manufacturing methods thereof. The negative plate of the lithium ion battery comprises a negative substrate. At least a surface of the negative substrate is uniformly coated with an active material layer which is characterized in that the surface of at least an active material layer is coated with lithium metal. When the negative plate is applied to a lithium ion battery, lithium metal is subjected to a dissolution reaction due to local battery theory. Simultaneously, a SEI film is generated on the surface of the active material layer of the negative plate, and a few lithium ions are embedded into the active material. Thus, capacity of the lithium ion battery is raised so as to overcome the problem that mismatching between capacity of the manufactured negative pole and capacity of a positive pole is caused and performance of the positive pole cannot be fully performed due to high irreversible capacity of materials such as Sn, Si and the like. Capacity of the lithium ion battery is raised greatly. Therefore, the negative plate can be adopted to raise capacity of the lithium ion battery.

The invention belongs to the technical field of electrochemistry and particularly provides a copper-manganese aqueous secondary battery based on deposition/dissolution reaction on positive and negative poles. The battery system specifically comprises a negative current collector, a positive current collector, an aqueous electrolyte containing bivalent copper ions and bivalent manganese ions as well as a porous separator for separating the positive and negative poles. When the battery is charged, the bivalent manganese ions in a positive pole area lose electrons and are oxidized into solid manganese dioxide, solid manganese dioxide is deposited on the positive current collector, and the copper ions in a negative pole area gain electrons and are reduced into metal copper, and metal copper isdeposited on the negative current collector; during discharging, manganese dioxide on the positive pole gain the electrons and is reduced into bivalent manganese ions, the bivalent manganese ions aredissolved in the electrolyte, meanwhile, copper on the negative pole releases electrons and is oxidized into bivalent copper ions, and the bivalent copper ions are dissolved in the electrolyte. The battery has the advantages of ultrahigh power density, ultra-long cycle life, high safety and low toxicity, and can be widely applied to the fields of large energy storage and the like.

The invention relates to a method for producing water class with a high mole ratio by coal gangue acid-leaching residues, and belongs to the technical field of resource utilization of coal-series solid wastes. Coal gangue acid-leaching residues with not more than 8% of Al2O3 and not less than 75% of SiO2 are adopted as raw materials, and the method comprises the following steps: preparing caustic soda according to the molar ratio of SiO2 in the acid residues, adding water to adjust the liquid solid ratio of the reaction, performing an alkali dissolution reaction at a temperature of 90-95 DEG C and a normal pressure, after the reaction is finished, filtering when the solution is hot so as to obtain water class with a low mole ratio, adding coal gangue acid-leaching residues into the water class with a low mole ratio, performing a mole-increasing reaction under a same operation condition, after the reaction is finished, filtering when the solution is hot so as to obtain water class with a high mole ratio. In the method, the water glass produced during alkali dissolution has a low mole ratio, which ensures a high dissolution rate of silicon during alkali dissolution and good filtration and washing performance of the filter cake; the increase of the mole ratio of the water glass from alkali dissolution is realized by continuing adding acid residues; after the mole-increasing reaction, acid residues are filtered and directly returned for alkali dissolution without the need of washing. The invention has a mild reaction condition, a simple process, and convenient operations, does not involve high-temperature high-pressure equipment, and also solves the problem of low mole ratio of water glass prepared by coal gangue.

The invention provides a preparation method for a fluorescence sensing material based on molecular imprinting and carbon dots. The method comprises the following steps: adding a substitute template and a functional monomer into a mixed solution composed of chloroform, acetonitrile and toluene, carrying out stirring and allowing the mixed solution to fully dissolve and react, then adding the carbon dots, carrying out stirring and then adding a crosslinking agent and an initiator, carrying out ultrasound and then introducing nitrogen for water bath and incubation, carrying out filtering, carrying out placing in a vacuum drying oven for aging, carrying out washing with an extracting solvent so as to remove template molecules, and carrying out vacuum drying so as to obtain a molecular imprinting and carbon dot fluorescent sensing material. The preparation method for the fluorescence sensing material provided by the invention has the advantages of high stability, light-free bleaching, low toxicity and capability of directly forming a sensing material by embedding into molecular imprinting polymer through polymerization reaction without the need of subsequent modification; and the sensing material in the invention is simple in preparation process, and has specific recognition effect of the molecular imprinting polymer, strong fluorescence characteristic of the carbon dots, and selective recognition effect to sterigmatocystin.

The invention discloses a method for dissolving and extracting cellulose in bagasse. The method comprises the following steps: (1) soaking bagasse with water, filtrating, using sodium hydroxide solution to activate, washing with deionized water to ensure the pH value to be 7, filtrating, drying, grinding; (2) adding ionic liquid 1-butyl-3-methylimidazolium chloride in the pretreated bagasse, heating to 80 DEG C, keeping temperature for 2-5min, adding pyridine while stirring, performing dissolution reaction at 70-100 DEG C for 30-240min, centrifugalizing to obtain cellulose solution; (3) addingthe obtained cellulose solution in deionized water, stirring, filtrating to obtain filter residue, washing the filter residue with deionized water and drying to obtain regenerated cellulose. The method of the invention is easy, the process is convenient, energy-saving and environmentally friendly, and the method greatly expands the reuse of agricultural wastes and the range of application of cellulose, thus having broad application prospect.

The invention relates to the field of chemical industry and particularly relates to a process for extracting cellulose from vegetable. The method specifically comprises the following steps of: adding 1-butyl-3-methylimidazolium chloride in an amount which is 10 to 15 times mass of tobacco into tobacco, performing full dissolution reaction at the temperature of between 80 and 110 DEG C to obtain reaction liquor, performing solid-liquid separation on the reaction liquor to obtain liquor, namely a cellulose solution; and adding deionized water in an amount which is 3 to 5 times volume of the cellulose solution, and stirring for more than or equal to 30 minutes and then filtering to obtain filter residues, namely cellulose. Compared with the conventional method for performing activating treatment on tobacco cellulose by using acid and alkali, the process has the advantages that: due to the steam explosion pretreatment, the effects of low consumption, low pollution and high efficiency are achieved, and production cost can be obviously reduced; and compared with a method for dissolving cellulose by using ionic liquid only, the method for activating tobacco cellulose by steam explosion first and then dissolving cellulose by using ionic liquid has the advantage that the dissolving efficiency is improved by about 60 percent.

The invention provides a method for producing aluminum oxide by utilizing high-alumina fly ash. The method comprises the following steps: 1) pre-desilicification treatment; 2) primary alkali dissolution reaction; 3) secondary alkali dissolution reaction; 4) crystallization of sodium metaaluminate; 5) seed precipitation decomposition of aluminum hydroxide; and 6) aluminum oxide product. After the pre-desilicification treatment is carried out on high-alumina fly ash, the dissolution processes of the aluminum oxide are conducted by two steps, twice alkali dissolution adopts different alkali concentrations, so that the problem that the prior art only adopts alkali dissolution once and has high requirements on the reaction conditions of temperature and alkali concentration and the like can be effectively solved, the aluminum oxide in the high-alumina fly ash can be fully dissolved, and the dissolution rate can achieve more than 92%.

The invention discloses a battery. The battery comprises an anode, a cathode and an electrolyte solution. The anode comprises an anode current collector and an anode active material which undergoes an electrochemical reaction and can realize reversible release of an embedded ion. The cathode at least comprises a cathode current collector. The electrolyte solution comprises at least one solvent which can dissolve electrolytes and ionize the electrolytes, and the electrolytes can be ionized into at least one type of active ions which can undergo a reduction-deposition reaction and an oxidation-dissolution reaction at the cathode in a charge-discharge process. The electrolyte solution has a pH value of 3-7. The battery can be operated safely, is environmentally friendly, has a low cost, a long service life and good cycling performances and can be used in the field of large-scale energy storage.

The invention discloses a battery. The battery comprises an anode, a cathode and an electrolyte solution. The anode comprises an anode current collector and an anode active material which undergoes an electrochemical reaction and can realize reversible release of an embedded ion. The cathode at least comprises a cathode current collector. The electrolyte solution comprises at least one solvent which can dissolve electrolytes and ionize the electrolytes, and the electrolytes can be ionized into at least one type of active ions which can undergo a reduction-deposition reaction and an oxidation-dissolution reaction at the cathode in a charge-discharge process. A porous layer or a graphene layer is formed on the surface of the cathode and the porous layer has micron scale, submicron scale or nanoscale apertures. The battery can be operated safely, has a low production cost, a long service life and good cycling performances, and can be used as a substitute of an energy storage system and a lead acid battery in the field of large-scale energy storage.

The invention belongs to the technical field of processing of plant fiber and discloses a method for efficiently dissolving full components of plant fiber. The method comprises steps as follows: a plant fiber material is added to a water solution of an ion liquid, uniformly stirred and mixed and subjected to a dissolution reaction in a microwave environment at the temperature of 150 DEG C-180 DEG C, the stirring speed ranges from 200 rpm to 280 rpm, and the reaction time ranges from 15 min to 30 min; residues obtained after dissolution are separated centrifugally, and a plant fiber solution is obtained. The proper ion liquid and a dissolution process condition are selected, cellulose and lignin in the plant fiber can be dissolved simultaneously, and the dissolution rate of the plant fiber can be up to 90% or even higher than 95%.

The invention discloses a non-aqueous electrolyte secondary battery, which comprises: a positive pole, a negative pole and a non-aqueous electrolyte. The negative electrode includes a negative electrode active material containing at least Si. The nonaqueous electrolyte includes lithium hexafluorophosphate as a main supporting electrolyte, and has an acid content of not less than 50 ppm and not more than 200 ppm. The negative electrode has a potential of not lower than 0.6V and not higher than 1.5V with respect to the Li electrode at the end-of-discharge voltage of the battery. The battery can avoid the reduction of storage characteristics caused by the dissolution reaction of Si on the negative electrode and the precipitation reaction of dissolved Si during charging.

The invention relates to a method for producing an iron ore concentrate by using Bayer process red muddy sand. The method comprises the following steps of: drying, crushing, grinding and grading the red muddy sand; mixing the red muddy sand after grinding and grading with solution of sodium hydrate, then performing dissolution reaction on the mixture, and performing solid-liquid separation after finishing the reaction; and washing a solid obtained after the solid-liquid separation by using distilled water, and then performing wet magnetic separation to prepare the iron ore concentrate. In the method for producing the iron ore concentrate by using the Bayer process red muddy sand, the effective utilization ratio of the iron element can be over 90 percent, the Al2O3 content in the finally prepared iron ore concentrate is reduced to 2.0 percent, and the SiO2 content in the iron ore concentrate is less than 2.0 percent; and the method can realize continuous production of the process, utilize discharged red muddy sand to the utmost extent, promote the product added value, reduce the production cost and protect the environment.

The invention relates a chemical extraction method of agricultural waste, particularly a method for recycling lignin and cellulose in tobacco waste, comprising the following steps: crushing the tobacco waste, adding 10-30 times volume of water, regulating the pH value to 11-13, processing for no less than 1 min under microwave at 100 W to obtain a pretreatment material; filtering the pretreatment material, regulating the pH value of the filter residues to 4.0-5.0, reacting for no less than 40 min, and using an ionic liquid of 1-butyl-3-methyl imidazolium chloride to fully dissolve, carrying out solid-liquid separation to obtain the solid and liquid, wherein the solid is lignin, and the liquid contains cellulose. The method provides a continuous extraction process of nicotine, hemicellulose and cellulose. After nicotine products are obtained with high yield, the residues are used for extracting hemicellulose and cellulose, wherein cellulose has good sensory property and can be used as a high end material. The whole method is green, and the production cost is low.

Provided are an oil field shaft cleaning and stratum descaling de-blocking agent and preparation and application thereof. The oil field shaft cleaning and stratum descaling de-blocking agent is prepared by mixing 5-15 parts of EDTA-2Na, 1-8 parts of alpha-d-sodium glucoheptonate, 0.5-5 parts of beta-d-sodium glucoheptonate, 2-8 parts of potassium acetate, 0.5-5 parts of sodium lactate, 2-10 parts of glycol alkyl glucosamide active agent, 0.1-10 parts of enzymes, 1-6 parts of monosaccharide, 0.5-5 parts of ethyl alcohol and 28-87.4 parts of water. The oil field shaft cleaning and stratum descaling de-blocking agent is applied to shaft cleaning and stratum descaling. Active ingredients and a chelating agent are matched, an inorganic dissolution reaction is achieved mainly through a mild chelating mechanism, the product is carried out in a neutral environment from beginning to end, the synergistic effect is good, and barium sulfate, calcium sulfate, strontium sulfate and other impurities which cannot be removed through conventional acid pickling and conventional working liquid can be removed better; meanwhile, viscosity reduction and de-blocking can be achieved, part of viscosity reduction can be removed, the liquidity of crude oil can be improved, and the de-blocking efficiency is high; water sensitivity can be effectively inhibited, water blocking can be eliminated, good improving and stabilizing are achieved for stratum rock cores, oil deposit frameworks are not damaged, and oil deposit is protected well.

Provided is an apparatus for dissolving noble metals, including: a sealed dissolution reactor provided with agitators; a sealed electrolysis type chlorine producing unit for supplying chlorine gas produced via electrolysis to the dissolution reactor; a pH adjusting unit for controlling and maintaining pH of the liquid inside the dissolution reactor to convert the chlorine gas supplied to the dissolution reactor into a chlorine compound; and an inorganic material extraction unit for extracting inorganic materials from the liquid received from the dissolution reactor via heating/evaporation, wherein the pH adjusting unit controls pH of the liquid inside the dissolution reactor in such a manner that the chlorine compound is produced, the noble metal in a noble metal-containing sample introduced into the dissolution reactor is dissolved by the chlorine compound, and the liquid evaporated from the inorganic material extraction unit is recycled to the dissolution reactor.

The invention discloses an automatic regulation system and method for electrolyte. The automatic regulation system comprises a copper dissolution reaction system, a detection system and a regulation system, wherein the copper dissolution reaction system comprises a charging machine, a metering pump, a circulating pump, a heat exchanger, a copper dissolution tank, a sulfuric acid tank and a pure water tank and is used for realizing automatic reaction and generation of a copper sulfate solution; the detection system comprises a liquid level sensor, a temperature sensor and a concentration sensor, which are mounted on an inner wall of a liquid storage groove, and further comprises a control analysis module and a liquid level sensor; the control analysis module is electrically connected with the liquid level sensor, the temperature sensor and the concentration sensor and is used for receiving data detected by the three sensors and carrying out comparative analysis on the data; the regulation system comprises a touch display screen, and an PLC (Programmable Logic Controller) control module which is electrically connected with the touch display screen; a copper meter and upper and lower limit values of added sulfuric acid and pure water are manually input through the touch display screen; and the PLC control module is connected with the charging machine, a Roots blower, the metering pump, the circulating pump and a heater through a signal line and related control is carried out according to each input value.

The invention provides a comprehensive utilization method for converter slag. The converter slag, which comprises free calcium oxide in weight percent more than 3%, total calcium in weight percent of 23%-38% and total iron in weight percent of 8%-28%, is used in the method as the raw material. According to the method, sodium hydroxide, calcium citrate, iron oxide, magnesium sulfate and cement additive can be obtained through processing steps including pretreatment of the converter slag, citric acid dissolution reaction and filtration, hydrolysis reaction, sulfuric acid dissolution and filtration, iron precipitation reaction, iron oxide preparation and magnesium sulfate preparation. The method aims to utilize the converter slag discharged in large scale, so as to solve the environmental pollution problem and fully utilize iron and calcium resources in the converter slag.

The invention relates to a production method of methyl cyclopentenolone via amination and step-by-step reaction. The production method disclosed by the invention comprises the following steps: a, adding dimethylamine and hydrochloric acid into a salt-forming kettle, adjusting a pH value at 6.5, carrying out a dehydration reaction, adding formaldehyde after reacting and forming salt to carry out dissolution reaction and obtain a reaction intermediate; and b, pumping the reaction intermediate into an amination kettle, adding methyl alcohol and dimethyl furan to carry out a mannich reaction, then adding an alkali liquor to adjust the pH value at 10, subsequently carrying out an alkalization reaction to obtain an amination intermediate. The production method of methyl cyclopentenolone via amination and step-by-step reaction disclosed by the invention has the advantages that the double-kettle amination reaction can be continuously and simultaneously carried out, so that the time of the amination reaction can be shortened and the yield is improved; due to the adoption of the step-by-step reaction, the generation of dimethylamine side reaction products can be prevented and the reactants in the later stage are prevented from being brought to the reaction in the earlier stage; the yield is increased from 41% originally to 51% at present; and the ton unit cost of the MCP (Methyl Cyclopentenolone) is reduced from 105,000 originally to 68,000 at present.

The invention discloses a scraped car dismantling and recycling process whichcomprises the following steps: (1) pre-treating a station; (2) dismantling, namely dismantling scraped car parts and selecting out parts with rich rare and precious metals; (3) mechanically and automaticallycrushing and separating a car body; (4) crushing the dismantled scraped car parts with the rare and precious metals in the steps (2 and 3), grinding, performing dissolution reaction, and recycling. According to the process provided by the invention, the mechanized operation efficiency is high, no secondary environmental pollution is caused, the labor intensity of workers is greatly reduced, the scraped car body is quickly ground and physically separated, and materials such as steel and iron, copper, aluminum and rubber in the car body are recovered.

The invention provides preparation methods for a vacuum insulation panel and a core material thereof. In the preparation methods, waste solid coal ash and straw ash discharged from a thermal power plant in China are used as a silicon source, thermokalite dissolution reaction is performed at a high temperature and a high pressure, an innovative inorganic dispersion sol-gel method and an epoxide method preparation process are adopted, a coagulation method for preparing organic aerogel, a co-polymerization method for preparing hydrophobic aerogel, and a doped modified aerogel in-situ method are combined, an in-situ co-precursor modification method is adopted, at the same time, a silane with a hydrophobic group is introduced and mixed with the silicon source for a sol-gel process, secondary hydrophobic modification of gel and organic matter toughening and strengthening are adopted, an inorganic/organic hybrid composite bulk aerogel vacuum insulation panel core material is prepared under normal pressure, and a vacuum insulation panel is prepared by using the core material. The vacuum insulation panel core material of the invention can be separately applied to the building thermal insulation engineering, has good anti-NIR performance, high strength and good toughness, does not crush under extrusion and is low in cost. The aerogel vacuum insulation panel of the invention does not produce a cold and heat bridge phenomenon, with the vacuum degree being maintained for a long time, is not prone to bulging and scratching, and can be made into a bulk.