106results about "PH-change processes" patented technology

A system and process are provided for recovering and/or cleaning residual or waste petroleum products such as sludge accumulated within a storage tank or upon process equipment surfaces, or from inorganic materials such as sand or clay, and the like. The system and process include a negatively charged aqueous-based dispersion fluid, which is contacted with the petroleum product under controlled relatively high pressure and high shear conditions for fluidizing hydrocarbon molecules and for preventing such molecules from adherence to process equipment surfaces, or contaminants such as sand or clay. Additional mechanical separation as by subjecting the mixed petroleum product and dispersion fluid slurry to sonic vibration may also be employed. The thus-fluidized slurry of petroleum products, dispersion fluid, and inorganic materials can be separated by conventional techniques, as by settling and/or flotation, for further individual processing and/or re-use.

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.

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.

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.

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.

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.

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 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, and
  • means 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 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 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.

Provided is a method for producing stannous oxide, comprising a step of subjecting stannous sulfate to neutralization in an aqueous solution using ammonium carbonate or ammonium bicarbonate, and thereby precipitating stannous oxide. This production method is a novel means for producing stannous oxide in which chlorine, sulfur, sodium, and potassium are sufficiently reduced, and which has excellent solubility.