108results about "PH-change processes" patented technology

A method and an apparatus for preparing a substantially clear aqueous solution containing magnesium bicarbonate are disclosed. One method of preparing a substantially clear aqueous solution containing magnesium bicarbonate, includes contacting, with species resulting from the dissolution of carbon dioxide in water, an aqueous suspension of magnesium carbonate, at suitable conditions of pressure and temperature, so as to obtain an aqueous solution of magnesium bicarbonate and controlling the pH of the said solution so that, after reaction of the said species with the magnesium carbonate, the final pH falls within a range of from about 8.0 to about 8.8. One apparatus suitable for preparing an aqueous solution of magnesium bicarbonate, comprises means for contacting, with species resulting from the dissolution of carbon dioxide in water, a suspension of powdered magnesium carbonate in water so as to form an aqueous solution of magnesium bicarbonate and means for controlling the pH of the solution between about 7 and about 9 by adjusting the amount of at least one of the said species and said powdered magnesium carbonate that is contacted with the other.

An apparatus (2) includes a neutralization tank (3), a pump (4), a heat exchanger (6), a line mixer (8), a polymerizer (10), a first pipe (12), a second pipe (14), a third pipe (16), a fourth pipe (18), and a fifth pipe (20). Continuously supplied into the neutralization tank (3) are a monomer aqueous solution and a basic aqueous solution, so as to prepare a mixture solution. The mixture solution is circulated through the first pipe (12), the pump (4), the second pipe (14), the heat exchanger (6), and the third pipe (16). The mixture solution is supplied to the polymerizer through the fourth pipe (18). The apparatus (2) satisfies a requirement that a value X is not more than 200, which value X is found according to the following expression: “X=(V / F)·A”, wherein V is a volume of the mixture solution present in a neutralization system, F is a flow volume of the mixture solution to be supplied to a polymerization system, and A is a contact area of the mixture solution present in the neutralization system with a device(s) and a pipe(s) constituting the neutralization system. With this arrangement, it is possible to provide a water absorbent resin having superior whiteness.

A method of a wastewater treatment in a system consisting of at least one acid consuming step and at least one volatile acid generating step and further comprising step of evacuating the volatile acid from that at least one step generating at least one volatile acid and step of transferring at least one volatile acid to that at least one acid consuming step.

An improved process of production of a chlorinated sugar is described comprising chlorination of a partially protected sugar, wherein quenching as well as neutralization of chlorinated reaction mass is carried out concurrently and continuously in a reactor which is a continuous mixer as well as quencher providing continuous mixing of chlorination reaction mixture and pH adjusting solution and also provides for continuous quenching and continuous removal of quenched chlorinated reaction mixture.

The present invention generally relates to methods and systems for carrying out a pH-influenced chemical and / or biological reaction. In some embodiments, the pH-influenced reaction involves the conversion of CO2 to a dissolved species.

A system for purifying a cumene hydroperoxide cleavage product mixture comprises a cumene hydroperoxide cleavage product mixture feed containing impurities in fluid communication with an aqueous alkaline solution feed; the cumene hydroperoxide cleavage product mixture and aqueous alkaline solution feeds in fluid communication with a neutralization drum having a aqueous salt phase outlet; a aqueous salt phase feed containing impurities in fluid communication with a decomposer reactor having an oxidized aqueous salt phase outlet; an oxidizing agent feed in fluid communication with the aqueous salt phase feed containing the impurities prior to the decomposer reactor; and an oxidized aqueous salt phase feed containing water-soluble oxidized derivatives of the impurities in fluid communication with the cumene hydroperoxide cleavage product mixture prior to the neutralization drum.

Provided are methods and systems for generating nanoparticles from an inorganic precursor compound using a hydrothermal process within at least one CSTR or PFR maintained at an elevated temperature and an elevated pressure and a treatment vessel in which this reaction solution can be applied to one or more catalyst substrates. In operation, the reaction solution may be maintained within the CSTR at a substantially constant concentration and within a reaction temperature range for a reaction period sufficient to obtain nanoparticles having a desired average particle size of, for example, less than 10 nm formation and / or deposition. Variations of the basic method and system can provide, for example, the generation of complex particle size distribution profiles, the selective deposition of a multi-modal particle size distribution on a single substrate.

An apparatus subjects fluid waste to waves from an RF plasma. This allows continuous production of “activated water” characterized by cluster sizes below about 4 molecules per cluster, water having pH below 4 or above 10, or water having ORP of less than −350 mV or more than +800 mV. The basic frequency of the plasma is preferably between 0.44 MHz and 40.68 MHz, and the plasma is preferably modulated at a frequency between 10 kHz and 34 kHz. Flow rates typically range from 20 1 / hr to about 2000 1 hr.

The invention discloses an online pH adjusting device and an online pH adjusting process of catalytic hydrogenation reaction. The online pH adjusting device comprises a material cooling system, an online pH detection unit, an alkaline liquid supplementing unit and a control unit, wherein the material cooling system is communicated with a reaction kettle, and a material circulating loop is formed between the material cooling system and the reaction kettle; the online pH detection unit is used for detecting a pH value of a material cooled by the material cooling system; the alkaline liquid supplementing unit is used for conveying alkaline liquid into the reaction kettle; the control unit is used for receiving a signal of the online pH detection unit and controlling the alkaline liquid supplementing unit to be started and stopped according to the signal. The material cooling system and the reaction kettle form the material circulating loop, the pH value of the cooled material on the material circulating loop and adjusted according to the measurement result, and the variation of the pH value in the reaction process can be monitored in real time, so that the pH value in the entire catalytic hydrogenation reaction process is stable, the high efficiency of the catalytic hydrogenation reaction can be guaranteed, automatic control for the entire process is adopted, and the operation difficulty of workers can be alleviated.

The present invention generally relates to methods and systems for carrying out a pH-influenced chemical and / or biological reaction. In some embodiments, the pH-influenced reaction involves the conversion of CO2 to a dissolved species.

A method of making an oxygen-rich and stabilized oxidizing agent in a liquid, preferably water, involves exposure of aerated liquid to repeated bursts of ringing magnetic flux having a primary frequency of 10 kHz to 80 kHz, with the bursts repeated at a frequency of 1 Hz to 100 Hz, and with the water being kept basic at a pH level between pH 7 to pH 10. The oxidizing agent is believed to be a relatively stable complex of hydrogen peroxide, and has a significant anti-microbial effect on microorganisms, including biofilms, in the water achieved by oxidation of the oxidizing agent with chemical components of the microorganisms.

The present invention relates to multicolor colloidal particles coated with a metal nanoparticle mixture having colors in the visible region and a method for preparing the same. In particular, relates to a metal nanoparticle mixture in which two or more nanoparticles selected from the group consisting of metal nanoparticles exhibiting red color; metal nanoparticles exhibiting yellow color; and metal nanoparticles exhibiting blue color, are mixed in various compositional ratio, multicolor colloidal particles in which polymer or mineral colloidal particles are coated with the metal nanoparticle mixture, and a method for preparing the same. According to the present invention, all colors that are in the visible region can be developed by suitably mixing metal nanoparticles exhibiting three colors, and multicolor colloidal particles can be prepared by coating polymer or mineral colloidal particles with a metal nanoparticle mixture exhibiting various colors.

An improved process of production of a chlorinated sugar is described comprising chlorination of a partially protected sugar, wherein quenching as well as neutralization of chlorinated reaction mass is carried out concurrently and continuously in a reactor which is a continuous mixer as well as quencher providing continuous mixing of chlorination reaction mixture and pH adjusting solution and also provides for continuous quenching and continuous removal of quenched chlorinated reaction mixture.

The invention discloses an iron removal device for a nickel-cobalt-manganese sulfuric acid solution and a method for continuously removing iron ions in the nickel-cobalt-manganese sulfuric acid solution at low temperature, and relates to a method for removing iron in a nickel-cobalt-manganese sulfuric acid solution. The device is provided with an iron removal reactor and an aging reactor, a stirrer is arranged in the iron removal reactor, an aging reactor stirrer is arranged in the aging reactor, an iron removal reactor inner barrel is arranged in the iron removal reactor, a mixed feeding pipe and a carbonate solution feeding pipe are arranged between interlayers of the iron removal reactor and the iron removal reactor inner barrel, a mixer of a preheating device is arranged at the top of the mixed feeding pipe, a compressed air inlet and a to-be-deironed liquid feeding hole are formed in the mixer, and an automatic mountain flour feeder is arranged on the aging reactor. The invention further discloses the iron removal method. The device has the advantages that the requirement for equipment is not high, energy is saved, continuous production can be achieved, the productivity efficiency is greatly improved, ferrous iron ions can be oxidized into trivalent iron ions under the condition that an oxidizing agent is not added, and the iron removal rate is 99.5% or above.

The invention discloses a hydro-thermal treatment device and method for preparing high-peptization large-pore-volume pseudo-boehmite powder, relates to the field of preparation of pseudo-boehmite powder, and solves the problems that an existing hydro-thermal treatment device for preparing the high-peptization large-pore-volume pseudo-boehmite powder is tedious in operation and prone to deviation during pH value adjustment. Comprising a reaction kettle body, a detection device and a dropwise adding device, a driving motor is fixedly connected to the reaction kettle body, according to the hydro-thermal treatment device for preparing the high-peptizing large-pore-volume pseudo-boehmite powder, by arranging the detection device and the dropwise adding device, ammonia water can be intermittently and uniformly sprayed into slurry when the pH value is adjusted, and the stirring speed is increased; the pH value at the moment is obtained through the detection of the stirring, mixing and detecting device, the ammonia water is in a non-adding state at the moment, when the pH value does not reach a specified value, the dropwise adding device continues to intermittently add the ammonia water, and when the pH value reaches the specified value, dropwise adding and detecting are stopped immediately, so that the detection is more accurate, and the working efficiency is improved.

The asbestos waste neutralization device (10) comprises:an acid tank (23),a vat (16) containing a diluted acid solution, in which waste containing asbestos is dipped, with this solution neutralizing the asbestos waste,a filtration unit (21) to separate, at the end of the neutralization reaction, the solid inert waste from the liquid phase of the acid solution,a regeneration unit (22) for the attacking acid solution, which adjusts the hydrogen potential of the extracted liquid phase by adding concentrated acid contained in the acid reservoir, andmeans for transferring the regenerated solution into the vat.

The purpose of the present invention is to provide a method for manufacturing a new disinfectant from sodium hypochlorite that has degraded in quality during storage. A method for manufacturing a novel disinfectant from a solution containing hypochlorite ions, chlorate ions, and chloride ions, wherein the method includes: a first reaction step for adding sulfuric acid to the solution and generating chlorine gas; a step in which, in a recovery liquid A, the generated chlorine gas is caused to react with sodium hydroxide or calcium hydroxide and recovered as hypochlorite ions; a second reaction step for adding, to a reaction mother liquid after the first reaction step, sulfuric acid having a higher concentration than that in the first reaction step, and generating chlorine dioxide gas; a step in which, in a recovery liquid B, the generated chlorine dioxide gas is caused to react with sodium hydroxide and hydrogen peroxide and recovered as chlorite ions; and a step for mixing the recovery liquid A and the recovery liquid B and obtaining a novel disinfectant.

The invention relates to a system for continuously hydrolyzing hemicellulose to prepare a xylose liquid. The system comprises a neutralization unit, an acid regulating unit, a feeding unit, a liquidation jet unit, a feeding and discharging heat exchange unit and a discharging control unit, wherein the neutralization unit comprises a raw material tank, a neutralizing concentrated sulfuric acid pumpand a neutralizing pipeline mixer, the acid regulating unit comprises an acid-regulating concentrated sulfuric acid pump, an acid-regulating pipeline mixer and an acid regulating tank, the feeding unit comprises a feeding tank, the liquidation jet unit comprises a liquidation injector and a liquidation maintainer, the feeding and discharging heat exchange unit comprises a feeding and dischargingplate type heat exchanger and a first discharging temperature sensor, and the discharging control unit comprises a discharging valve and a reflux valve. The prepared xylose liquid exchanges heat witha hemicellulose liquid in the feeding and discharging plate type heat exchanger, so that the temperature of the xylose liquid is reduced, and the temperature of the hemicellulose liquid is increased.The invention also discloses a method for using the system. The system for continuously hydrolyzing the hemicellulose to prepare the xylose liquid has the advantages that heat exchanging is performedon feeding and discharging simultaneously, thereby greatly reducing the energy consumption; feeding and discharging are performed continuously, thereby improving the production efficiency, and simplifying the workers' operation.

The invention discloses an automatic control reactor for solid-liquid reaction separation. The automatic control reactor structurally comprises a motor, a retainer, a feeding inlet, an automatic temperature controller, a visual window, a reactor body, a kettle bottom, fixed supporting legs and sealing plates. The automatic control reactor is characterized in that a power source plate is connectedwith a temperature bulb pipe; the temperature bulb pipe is inserted into the reactor by a detection capillary; when the temperature in a temperature bulb is changed, the liquid volume is also changed,so that temperature change inside the reactor can be sensed according to volume change of expanded liquid in the temperature bulb pipe; the detection capillary transmits information to a temperatureadjusting valve according to the change phenomenon of the liquid; a valve rod is connected with a spring; the opening degree of the valve is controlled according to spring expansion, and further automatic control of the temperature inside the reactor is realized; meanwhile, a prompting port and a metering coiled tube can measure the liquid in the temperature bulb pipe and gives out prompt, so thatan operator conveniently learns the temperature in the reactor; by connection of a drawing rod and a control lever, reactants can be quickly separated out of a tank.

An integrated equipment for chemical precipitation reaction, including a stirring tank and a centrifuge. The stirring tank is provided with a feeding port, the centrifuge is provided with a feeding port and a first water inlet, and the stirring tank is provided with a continuous operation discharge pipe and / or The intermittent operation discharge pipe and the continuous operation discharge pipe are respectively connected with the stirring tank and the centrifuge; the intermittent operation discharge pipe is respectively connected with the stirring tank and the centrifuge; there are also a first liquid storage room, a second liquid storage room and a water pump , the first liquid storage chamber is provided with a second water inlet and a liquid discharge port, and the second liquid storage chamber is provided with a third water inlet; the centrifuge is provided with a drainage pipe, which is connected to the second water inlet and the third water inlet respectively. The water port is connected; the centrifuge is provided with a circulating water pipe, one end of which is connected with the first water inlet, and the other end is connected with the water pump; machine, the screw feeder is connected with the centrifuge. The invention can carry out diversion treatment on the sewage, which is energy-saving and environment-friendly.

The invention discloses a method for mechanochemical coupling ultrasonic chemical strengthening of metal leaching in secondary zinc oxide powder, comprising: mechanical activation: mechanically activating raw materials containing secondary zinc oxide powder to obtain an activation material; ultrasonic treatment: combining the activation material with the The acidic leaching solution is mixed to obtain a mixture, and the mixture is subjected to ultrasonic treatment, and the obtained liquid phase is the leachate. The combination of mechanochemical activation and sonochemistry enhanced the leaching rate and leaching rate of multi-metals through structural destruction and cavitation of secondary zinc oxide powder. This process can indirectly reduce the use concentration of acidic leaching solution and shorten the leaching time. In actual production, the specific application of this process can reduce the anti-corrosion cost and operating production cost of reaction equipment, and indirectly produce good production benefits.

The invention relates to a pH (potential of hydrogen) adjusting device. The pH adjusting device comprises an adjusting machine body, wherein the adjusting machine body comprises an adjusting container, a separating layer and a neutralizing tank; the left upper end of the adjusting machine body is provided with a liquid inlet; the liquid inlet is connected with a liquid intake pipeline; the separating layer comprises a first blocking plate and a second blocking plate; the first blocking plate and the second blocking plate are fixedly connected with the bottom part of the adjusting machine bodyalong the vertical direction; a water passing pipe is arranged at the upper end of the separating plate; the left end and right end of the water passing pipe respectively penetrate through the surfaces of the first blocking plate and the second blocking plate; the left end of the water passing pipe extends to the bottom end of the adjusting container; a third blocking plate is arranged at the upper end of the neutralizing tank, a filtering net is arranged on the third blocking plate, and the right end of the water intake pipe extends to the upper end of the filtering net; an alkaline solutionstorage tank and an acid solution storage tank are arranged at the left end and right end of the adjusting machine body; a first pipeline and a second pipeline are arranged at the upper end of the adjusting container; one end of the first pipeline is communicated to the bottom end of the acid solution storage tank, and one end of the second pipeline is communicated to the bottom end of the alkaline solution storage tank; a pipeline is connected with an electromagnetic dosage pump; digital control equipment is arranged at the outer side of the machine body. The pH adjusting device has the advantages that the structure is simple, and the suitability is strong.