65results about "PH-change processes" patented technology

The invention belongs to the technical field of drilling fluid processing, and particularly relates to a special silicate water-based drilling fluid for a coal-bed gas well as well as a processing method and a processing device of the special silicate water-based drilling fluid. The top end of the stirring tank is communicated with a first feeding hole and a second feeding hole, and the bottom end of the stirring tank is communicated with a discharging pipe; a rotating shaft is rotationally connected to the top surface of the inner wall of the stirring tank, and a sliding groove is formed in the bottom surface of the rotating shaft; a rotating shaft is driven by a first motor to rotate, and the rotating shaft drives a connecting shaft to rotate, so that fresh water and additives in a stirring tank are stirred and mixed by stirring blades, and a first screw rod can be driven by the first motor to positively and negatively rotate in a reciprocating manner in the mixing process; the first screw rod drives the connecting shaft to move up and down in the sliding groove, so that the stirring blades move up and down, the stirring blades stir and mix the water and the additive while moving, and the mixing efficiency and uniformity of the additive and the water are improved.

The application belongs to the technical field of wastewater treatment, and particularly relates to a polymerization reaction device for producing polyaluminum sulfate flocculant and a production method, which comprises a base, a reaction kettle, a mixing structure and a scraping assembly. The reaction kettle is formed by combining an upper tank body and a lower tank body. An exhaust pipe is fixed to the top of the upper tank body. A feed pipe is symmetrically fixed to the upper part of the side of the lower tank body. The mixing structure is arranged in the middle of the reaction kettle. The mixing structure is rotatably installed below the middle of the upper tank body. The mixing structure comprises a driving shaft, and the side of the driving shaft is uniformly provided with stirring rods. A motor for driving the mixing structure to rotate is fixed to the top of the upper tank body. The scraping assembly is installed on the driving shaft. The scraping assembly is driven to rotate by the driving shaft to clean the foam on the top of the mixed solution in the reaction kettle. The foam on the surface of the mixed solution is cleaned by the scraping assembly, so that the gas generated in the reaction process is smoothly discharged upwards from the inside of the solution, and the reaction is stably carried out.

The present invention describes an integrated system, apparatus and method for de- alkalizing lignocellulosic material and producing bioproducts. Particularly, the system produces de-alkalized lignocellulosic feedstock which can be used in various downstream bioproducts, such as formation of biofuel, biogas and biochemicals. Among others, the system comprises a slurry-making subsystem for combining lignocellulosic pre-treated particles with a water mixture comprise of water and a chemical agent to obtain a slurry; an ultrasonic treatment subsystem for the disruption of cellular structures, loosening of lignocellulosic matrix, removing and neutralizing alkali at the cellular level of the lignocellulosic material in the slurry; a hydrodynamic cavitation subsystem for high-shear mechanical breakdown of the lignocellulosic material at the cellular level in the slurry; and a direct steam injection subsystem in connection with the slurry-making subsystem and / or the hydrodynamic cavitation subsystem to achieve hydrostatic cavitation and alkali neutralization in the slurry.

The invention relates to the technical field of polyester material production, and discloses a polymerization method and system for producing chinlon 6 slices, and the provided chinlon 6 slices have the advantages of higher relative viscosity, narrower molecular weight distribution, lower water content, and higher yield. According to the system used by the invention, a ZnO / Al2O3 composite variable active catalyst adding window is directly arranged at the bottom of the melting and mixing unit 1, so that the ZnO / Al2O3 composite variable active catalyst can be ensured to be more uniformly dispersed in the whole reaction system, the reaction conditions are optimized, the variable active catalyst is adopted, the pH is dynamically regulated and controlled, and the reaction efficiency is improved. The exposure degree of active sites of the catalyst can be accurately adjusted according to the requirements of different stages of a polymerization reaction, generation of cyclic dimers in the caprolactam hydrolysis ring-opening process is effectively inhibited in the pre-polymerization stage, the content of cyclic by-products is remarkably reduced to 3.5% or below, the monomer utilization rate is increased, increase of the molecular weight is promoted in the post-polymerization stage, and the yield of the catalyst is increased. And product quality.

A method and system for converting copper cyanide to copper oxide is provided. The method includes contacting a copper cyanide solution with an acidic solution in a precipitation tank under reaction conditions sufficient to produce a copper cyanide slurry, removing the copper cyanide slurry from the precipitation tank, separating solid copper cyanide from the copper cyanide slurry in a first separation device, removing the solid copper cyanide from the first separation device, contacting the solid copper cyanide with a sodium hydroxide solution in a production tank under reaction conditions sufficient to produce a copper oxide slurry, removing the copper oxide slurry from the production tank, separating solid copper oxide from the copper oxide slurry in a second separation device, and removing from the second separation device any residual sodium hydroxide not reacted during the process of contacting the solid copper cyanide with the sodium hydroxide solution in the production tank.

This invention provides a production process for manufacturing metallic magnesium and industrial silicon by decomposing serpentine using the hydrochloric acid method. [Solution] The present invention provides a method for processing serpentine ore as a raw material using a two-stage countercurrent hydrochloric acid leaching process. The wet process steps include storage and filtration of the slurry after ore dressing, two-stage hydrochloric acid leaching under atmospheric pressure, washing and filtration of the silicon slag after leaching, removal of iron and nickel precipitation from the leaching solution, separation, washing and filtration of the obtained iron hydroxide and nickel hydroxide, crystallization and evaporation of the magnesium chloride solution, and production of hydrochloric acid using the gas generated after the thermal decomposition of magnesium chloride. The present invention has developed a serpentine decomposition technology using hydrochloric acid, a metallic magnesium production process using a drying-electrolytic method, and a process for producing industrial silicon by smelting silicon slag in an electric furnace.

The invention provides a phosphorus recovery processing system and a recovery processing method thereof. During recovery processing, cooling equipment is communicated with a growth chamber of molecular beam epitaxy equipment, so that the pressure of the cooling equipment is lower than atmospheric pressure, and a phosphorus material in the growth chamber is driven into the cooling equipment through baking; isolating the growth chamber from the cooling equipment, introducing heated nitrogen into the cooling equipment, purging phosphorus-containing gas in the cooling equipment, and discharging the phosphorus-containing gas outwards; phosphorus-containing gas is conveyed to a first treatment main body of the treatment equipment and is subjected to cooling, hydrogen peroxide treatment, copper sulfate treatment, potassium permanganate treatment and inspection treatment in sequence, and finally waste liquid is discharged to a first neutralizing tank for alkaline neutralization treatment. Through the configuration, the safety and the treatment efficiency of phosphorus recovery treatment are remarkably improved.

The invention relates to the technical field of biological solid waste treatment, and discloses a biological fermentation concentrated residue slurry separation method and a biological fermentation concentrated residue slurry separation system. At least one of aluminum chloride, aluminum sulfate, ferric sulfate, ferric chloride, magnesium chloride and magnesium sulfate is added for further reaction to remove excessively added sodium silicate, adhesive force among microorganisms is reduced, meanwhile, silicon dioxide is generated, friction is further enhanced, viscosity is reduced, and solid-liquid separation of the high-viscosity biological fermentation residue slurry is finally achieved through filtration; and the method has the advantages of high separation efficiency, simple reaction condition requirements, few reagents and no residue, and has great popularization and application values.

The invention discloses a multi-stage separation and resource extraction sludge treatment system, which comprises a pretreatment unit, a grading separation unit, a resource extraction unit, a tail gas treatment unit and a circulation regulation mechanism, the pretreatment unit comprises a sludge receiving bin, a slurrying device and a crushing device, the fractional separation unit comprises a solid-liquid separation device, an organic matter extraction device and an inorganic matter extraction device, the resource extraction unit comprises a heavy metal recovery device and a phosphorus extraction device, and the heavy metal recovery device and the phosphorus extraction device are communicated with the inorganic matter extraction device through pipelines. The tail gas treatment unit comprises a waste gas collection pipeline and a waste gas purification device, and the circulating adjustment mechanism comprises a device body, a circulating pump and a flow divider valve. The multi-stage separation and resource extraction sludge treatment system provided by the invention has the advantages of high sludge separation efficiency and sufficient resource recovery.

Microbeads capable of controlling the pH of a sample are provided. The microbeads can control the pH of a sample to be equal, similar or close to a target pH without an automated device and the like such as an additional valve system for controlling pH, and thus could be readily applied to fields requiring pH control.

To provide a method for manufacturing a new germicidal disinfectant from sodium hypochlorite degraded during storage.SOLUTION: A method for manufacturing a new germicidal disinfectant from a solution including hypochlorite ion, chloric ion, and chloride ion, includes: a first reaction process of adding sulfuric acid to the solution and generating chlorine gas; a process of reacting the chlorine gas generated in a recovery liquid A with sodium hydroxide or calcium hydroxide and recovering it as hypochlorite ion; a second reaction process of adding sulfuric acid having higher concentration than that in the first reaction process to a reaction mother liquid after the first reaction process and generating chlorine dioxide gas; a process of reacting the generated chlorine dioxide gas with sodium hydroxide and hydrogen peroxide in a recovery liquid B and recovering it as chlorous acid ion; and a process of blending the recovery liquid A with the recovery liquid B to obtain the new germicidal disinfectant.SELECTED DRAWING: None

The purpose of the present invention is to provide an alkaline subcritical water composition, a water-containing composition, a device, and a container which are capable of inhibiting corrosion of a reaction device and capable of decomposing a polymer and the like. The present disclosure is an alkaline subcritical water composition having a pH of 13.7 or less and a potential of 400 mV or more when a current density exceeds 10 mA / cm2 in an anodic polarization curve in which a steel material is used in a test electrode.

The present invention relates to an integrated system, apparatus, and method for dealkalization of wood cellulose materials and production of bio-based products. In particular, the system generates dealkalized wood cellulose raw materials that can be used as raw materials for various downstream bio-based products. The system includes a slurry generation subsystem that combines pre-treated particles of wood cellulose material with a water mixture containing water and chemical agents to obtain a slurry; an ultrasonic treatment subsystem that breaks down the cellular structure of the wood cellulose material in the slurry, relaxes the wood cellulose matrix, and removes and neutralizes alkali at the cellular level; a hydrodynamic cavitation subsystem that decomposes the wood cellulose material in the slurry at the cellular level using high shear mechanical decomposition; and a direct steam injection subsystem connected to the slurry generation subsystem and / or the cavitation subsystem to achieve hydrostatic cavitation and alkali neutralization in the slurry.

A method for manufacturing a positive electrode active material precursor comprises a nucleation step of forming nuclei of the precursor in a first reactor; and a nucleus growth step of growing the nuclei formed in the nucleation step in a second reactor, wherein the volume of the second reactor is larger than the volume of the first reactor.

The present application belongs to the technical field of corn stalk resource utilization, and particularly relates to a method and device for directional regulation of anaerobic continuous production of volatile fatty acids from corn stalks. The method comprises the following steps: mixing corn stalks with inoculum in a reactor, adjusting the initial pH to 4.0-10.0, and then performing a continuous hydrolysis and acid production reaction, with corn stalks being added to the reactor at regular intervals every day; in the continuous hydrolysis and acid production reaction, the pH of the reaction system is controlled at 4.0-10.0, and intermittent micro-aeration is performed, with the aeration frequency being once per day after feeding, and the aeration amount being 60-100 mL / L per aeration. The method can achieve efficient directional hydrolysis and acid production from corn stalks, and the total volatile fatty acid concentration and the proportion of acetic acid or butyric acid concentration are both significantly improved.

The present disclosure relates to an acid-base neutralizer. Alkali is distributed within the reactor and acid is added through an acid injector at the bottom of the lower cylindrical section of the reactor after dilution with the neutralized product in the injection tube. The acid injector is located entirely within the vertical portion of the injection tube, and both the acid injector and the vertical section of the injection tube are arranged coaxially with a vertical axis defined by the lower cylindrical section of the reactor.

The invention relates to the technical field of nano nickel protoxide production, in particular to a continuous nano nickel protoxide preparation system and production process based on fluid dynamic regulation and control, the system comprises a fluid supply unit, the fluid supply unit is connected with a precision control unit, the precision control unit is connected with a reaction synthesis unit, and the reaction synthesis unit is connected with a control unit. The reaction synthesis unit is connected with a post-treatment unit, the fluid supply unit comprises a nickel salt precursor storage tank, a reducing agent storage tank and a pH regulator storage tank, and the nickel salt precursor storage tank, the reducing agent storage tank and the pH regulator storage tank are respectively provided with a storage tank equipped magnetic stirring device and a temperature control jacket. Through continuous production, the shutdown time and equipment cleaning time in intermittent production are reduced, the production efficiency is remarkably improved, the precise control unit can adjust fluid parameters in real time, the stability and consistency of reaction conditions are ensured, and the production efficiency is further improved.

The disclosure pertains to an ammonium nitrate reactor with a first type static mixer in the mixing zone upstream of the tube bundle and / or a second type static mixer downstream of the tube bundle.

A method for preparing metallic magnesium and industrial silicon by decomposing serpentine with hydrochloric acid is provided. Serpentine is used as a raw material, and is processed by a two-stage countercurrent leaching process in a hydrochloric acid system. A hydrometallurgical process is adopted, including beneficiation, wet grinding, slurry storage, filtration, two-stage atmospheric pressure hydrochloric acid leaching, washing and filtration of leached silica slag, iron removal and nickel precipitation from a leachate, separation, washing and filtration of a ferric hydroxide precipitate and a nickel hydroxide precipitate, crystallization and evaporation of a magnesium chloride solution, and hydrochloric acid preparation from a flue gas generated after thermal decomposition of magnesium chloride. The present disclosure develops a process of decomposing serpentine with hydrochloric acid and producing metallic magnesium by a drying-electrolysis method, and a process of producing industrial silicon by smelting silica slag in an electric furnace.

The invention discloses a magnetic particle filtering system for electronic grade polyethylene glycol production, and belongs to the technical field of polyethylene glycol production process improvement, the magnetic particle filtering system comprises a reactor, a front filtering device is arranged at the front end of the reactor, the front filtering device is connected with the reactor through a pipeline, and the front filtering device comprises a filtering unit A and a filtering unit B; the filter unit B is connected to the filter unit A in parallel through a pipeline. The filter screen adopts a cylindrical filter screen, the bottom of the cylindrical filter screen is of a net-shaped closed structure, the upper part of the cylindrical filter screen is of an opening structure with a diagonal plane, and a feed port is higher than the front end of the upper part of the cylindrical filter screen and lower than the rear end of the upper part of the cylindrical filter screen; the rear end of the upper part of the barrel-shaped filter screen is higher than the front end of the upper part of the barrel-shaped filter screen, so that non-metal impurities in ethylene glycol can be more comprehensively intercepted, the flux of an ethylene glycol solution is increased, the filtering speed of ethylene glycol is increased, and the filtering efficiency is improved.

The invention belongs to the technical field of cutting fluid preparation, and discloses an efficient and environment-friendly magnesium alloy cutting fluid raw material composition and a preparation method of cutting fluid, the efficient and environment-friendly magnesium alloy cutting fluid raw material composition comprises a preparation box, first supporting legs are fixedly connected to the four corners of the bottom of the preparation box, and cross beams are fixedly mounted at the joints of every two adjacent first supporting legs; one end face of one cross beam is fixedly connected with a connecting arm, and one end of the connecting arm is fixedly connected with a treatment box; through the arranged treatment box, the structure main body on the treatment box can be borne, and meanwhile, the arranged box cover, the rectangular frame, the filter screen, the inclined top frame, the supporting block, the feeding pipe, the flow dividing box, the guide pipe, the electromagnetic valve, the circulating pipe, the discharging pipe, the first pump body and the second pump body are matched; and the circulating type multi-time filtering and impurity removing work of the prepared cutting fluid in the preparation box can be achieved, so that the preparation and processing quality and the subsequent use effect of the cutting fluid are effectively improved.

Provided is a method for producing a lithium-containing solution that allows suppressing production cost for lithium production by suppressing solution amount after an adsorption step, increasing a lithium content rate in the lithium-containing solution, and suppressing amount of solution used in a step after a manganese oxidation step. The method for producing a lithium-containing solution performs the adsorption step, an eluting step, and an manganese oxidation step in this order. In the adsorption step, an anion-exchange resin is used together with the lithium adsorbent. This aspect allows hydrogen ions generated in the adsorption step to be adsorbed by the anion-exchange resin, thereby promoting an adsorption reaction. Therefore, the solution amount after the adsorption step can be suppressed, the lithium content rate in the lithium-containing solution increases, the amount of the solution used in the step after the manganese oxidation step is suppressed. This allows suppressing production cost for lithium production.

A method for preparing metallic magnesium and industrial silicon by decomposing serpentine with hydrochloric acid is provided. Serpentine is used as a raw material, and is processed by a two-stage countercurrent leaching process in a hydrochloric acid system. A hydrometallurgical process is adopted, including beneficiation, wet grinding, slurry storage, filtration, two-stage atmospheric pressure hydrochloric acid leaching, washing and filtration of leached silica slag, iron removal and nickel precipitation from a leachate, separation, washing and filtration of a ferric hydroxide precipitate and a nickel hydroxide precipitate, crystallization and evaporation of a magnesium chloride solution, and hydrochloric acid preparation from a flue gas generated after thermal decomposition of magnesium chloride. The present disclosure develops a process of decomposing serpentine with hydrochloric acid and producing metallic magnesium by a drying-electrolysis method, and a process of producing industrial silicon by smelting silica slag in an electric furnace.

The invention relates to an ammonium nitrate reactor with a first type of static mixer in a mixing zone upstream of a tube bundle and / or with a second type of static mixer downstream of the tube bundle.

What is provided is stannous oxide having an α-ray emission amount of 0.002 cph / cm2 or less after heating in an atmosphere at 100° C. for 6 hours. Tin containing lead as an impurity is dissolved in a sulfuric acid aqueous solution to prepare a tin sulfate aqueous solution, and lead sulfate is precipitated in the aqueous solution and removed. While stirring the tin sulfate aqueous solution from which lead sulfate has been removed, a lead nitrate aqueous solution containing lead having an α-ray emission amount of 10 cph / cm2 or less is added to cause lead sulfate to be precipitated in the tin sulfate aqueous solution, and simultaneously the tin sulfate aqueous solution is circulated while removing the lead sulfate from the aqueous solution. A neutralizing agent is added to the tin sulfate aqueous solution to collect stannous oxide.

The invention relates to a catalyst activation method in a 1, 4-butynediol production process, which comprises the following steps: accurately weighing 1.2 g of a catalyst with the mass content of 4-10% and 20 mL of a formaldehyde solution with the mass concentration of 15-35% at normal temperature, putting into a three-necked bottle, and adjusting the pH value of the mixed solution to 4-7.5 by using Na2CO3-NaHCO3; introducing excessive acetylene, controlling the flow rate of the acetylene at 6 mL / min, raising the temperature to 65-85 DEG C, and activating the catalyst for 6-18 hours; after the activation of the catalyst is finished, nitrogen is introduced, and the reaction temperature is reduced to room temperature; carrying out reduced pressure suction filtration on the mixed solution, rapidly putting the activated catalyst into the three-necked bottle again, adding 20mL of formaldehyde solution with the mass concentration of 15-35%, and regulating the pH value to 6 by using Na2CO3-NaHCO3; and continuously introducing acetylene, controlling the flow rate of acetylene at 10 mL / min, raising the reaction temperature to 90 DEG C, and reacting for 2 hours to complete the acetylene hydroformylation reaction. In the process of synthesizing 1, 4-butynediol by an alkyne-aldehyde method, the conditions of the activation process of the catalyst are reasonably controlled, so that the conversion rate of cuprous acetylene is increased, the yield of a byproduct polyacetylene is reduced, and the alkyne hydroformylation performance of the copper-based catalyst is improved.

The invention discloses a magnesium-aluminum hydrotalcite stirring reaction kettle, which relates to the technical field of magnesium-aluminum hydrotalcite production, and comprises a kettle body and a stirring mechanism arranged in the kettle body, the auxiliary paddle is arranged in the kettle body, is used for assisting the stirring mechanism in stirring so as to promote the crystallization reaction of the magnesium-aluminum mixed liquid and can automatically adjust the stirring height according to the crystal precipitation condition; the double-layer track is arranged at the top of the kettle body and can control the auxiliary paddle to do spiral reciprocating motion, the driving pipe slides along the double-layer track and synchronously does self-rotating motion, and a spray head capable of uniformly distributing and controlling an alkaline solution is arranged in the driving pipe; the double-layer track guides the auxiliary paddle and the spray head to do periodic spiral reciprocating motion, the auxiliary paddle automatically ascends and maintains high-speed rotation along with the crystal precipitation condition, precipitated crystals are protected, meanwhile, it is ensured that supernatant liquor is fully mixed, meanwhile, alkali liquor is dynamically injected in cooperation with the spray head, and the alkali liquor accurately acts on an upper layer area; the crystallization reaction efficiency is further ensured.

This invention belongs to the field of silicone oil preparation technology, specifically relating to a production line and process for inert high-boiling silicone oil, comprising, in sequence: a hydrolysis reaction unit, a dechlorination reaction unit, a dehydrogenation-neutralization reaction unit, a polymerization reaction unit, and an evaporation unit. The production line and process for inert high-boiling silicone oil described in this invention have the advantages of simple and controllable production process, and suitability for continuous industrial production, enabling the production of high-boiling silicone oil with low chloride ion content, no hydrogen content, and controllable viscosity.

The invention discloses a high-molecular organic polymer catalytic cracking process. The process comprises the following steps: storing, lifting and quantitatively transporting cleaned PVC (Polyvinyl Chloride) particles to a main reactor by a feeding and discharging storage management system; the main reactor is subjected to catalytic cracking by using a transition metal catalyst under the supercritical water condition by controlling the temperature and the pressure; the steam management system is used for collecting oil liquid generated by the reaction and carrying out fractionation, purification and cooling treatment on the oil liquid so as to extract gas-phase alkane and olefin substances; the solid-liquid separation system is used for separating carbon residues and a reaction liquid-phase matrix after reaction; hydroxides are added into the liquid fractionation system for precipitation and impurity removal, and then a filter cake with salt as the main component is separated out through a solid-liquid separator; and the solid forming and drying system is used for carrying out forming treatment on the separated carbon material and drying the carbon material through a tunnel kiln. Through catalytic cracking of the high-molecular organic polymer by the process, the problem that PVC is difficult to effectively treat is solved, and maximum utilization of resources is realized.

The present invention relates to a precursor preparation device and a precursor preparation method. The precursor preparation device for preparing a precursor by co-precipitating a raw material, according to the present invention, comprises: a co-precipitation reaction tank in which accommodation materials including a reactant and a filtrate are accommodated; and a pH measurement system for measuring the pH of the filtrate, wherein the pH measurement system comprises: a filter which is positioned inside the co-precipitation reaction tank, and which filters out the filtrate from the accommodation material; and a pH measurement unit positioned outside of the co-precipitation reaction tank so as to measure the pH of the filtrate filtered out through the filter.