52results about How to "Prevent coalescing" patented technology

The present invention relates to a topical, emulsive composition containing Dapsone or its derivative. The inventive composition incorporates emollients and Dapsone or its derivative in a stable emulsion. The stability is achieved through the use of a combination of certain surfactant mixtures and an enhancer providing solubility of the Dapsone.

A novel process and apparatus for producing metal nanoparticles by electro-explosion of wires is disclosed. The invention comprises placing a wire and a plate of the same material as two electrodes in a dense medium, preferably water, in such a manner so as to guide the wire in a straight line and applying a voltage of greater than 12V to said electrodes to cause the wire explode into nanoparticles.

The invention belongs to the composite material field and discloses a porous graphene-metal oxide composite material and its preparation method. The material is characterized in that porous graphene prepared through a vapor phase chemical deposition method is used as a carrier, and metal oxide particles having diameters of 0.5-100nm are filled to the nanometer pores of the porous graphene. The preparation method is characterized in that an ion exchange process is adopted to make metal salt components enter the pores of the porous graphene, and then the deposition method or the calcining method is utilized to obtain the composite structure of the porous graphene having metal oxide filled meso-pores or micro-pores. The composite material has potential application values in the lithium ion battery field, the super capacitor field, the conductive filling material field, the heterogeneous catalysis field and the like.

The invention relates to a method for preparing zirconium dioxide ceramic microspheres with a microfluid device, belonging to the technical field of material synthesis and formation. The method comprises the following steps: by using zirconium dioxide precursor sol as an inner phase fluid, an oily solution as an intermediate phase fluid and an aqueous solution as a continuous phase fluid, preparing monodisperse water-in-oil-in-water double-emulsion drops with a microfluid device by regulating the flow rates of the three phases of fluids, adding an alkaline solution into the continuous phase to initiate the gel reaction, cleaning and drying the gel microspheres obtained by the gel reaction, and sintering to obtain the ZrO2 ceramic microspheres. The zirconium dioxide ceramic microspheres prepared by the method have the advantages of high sphericity and uniform dimension; on the micrometer level, the action of surface tension of the zirconium dioxide ceramic microspheres is far larger than the deformation generated by gravity; and the reaction synthesis on the sol-gel system by using the double-emulsion drops as the template has universality, thereby having potential application prospects in the nuclear fuel preparation.

The invention provides a high temperature-resistant high-mineralization degree foam scrubbing agent and its preparation method and use. The high temperature-resistant high-mineralization degree foam scrubbing agent comprises, by mass, 15-40% of an anionic surfactant, 5-15% of a cationic surfactant and the balance deionized water. The anionic surfactant comprises fatty alcohol polyoxyethylene ether sulfate, sodium alpha-olefin sulfonate or sodium dodecyl sulfate. The cationic surfactant comprises a cationic Gemini surfactant. The invention provides a preparation method of the high temperature-resistant high-mineralization degree foam scrubbing agent. The preparation method comprises adding the anionic surfactant and the cationic surfactant into a reaction container by one step, adding deionized water into the reaction container to obtain a mixed solution, heating the mixed solution to a temperature of 50-60 DEG C and carrying out stirring to obtain the foam scrubbing agent. The foam scrubbing agent solves the problem that the existing foam scrubbing agent has suddenly reduced foam properties in temperature and mineralization degree increasing and can be used for a draining and gas production technology of a deep high temperature high-mineralization degree gas well.

The invention discloses a built-in spring tubular reactor. A gland of a shell is provided with heat exchange carrier inlet and outlet; the gland is connected with the shell through a flange; the shell is provided with reaction material inlet and outlet; an S-shaped reaction tube, a spring and a baffle plate are arranged inside the shell; the S-shaped reaction tube comprises a horizontal straight pipe and a U-shaped connecting pipe; the horizontal straight pipe is connected with the U-shaped connecting pipe through a pipe flange; the spring is fixed in the horizontal straight pipe; a metal slender rod is embedded into the pipe flange; one end of the S-shaped reaction tube is connected with the reaction material outlet, and the other end of the S-shaped reaction tube is connected with the reaction material inlet. The built-in spring tubular reactor has the advantages that: the built-in spring tubular reactor has temperature conductivity higher than that of the normal tubular reactor, can effectively prevent coalescence of bubbles and formation of plug flow of gas-liquid two-phase section, and can operate reliably for a long term under the condition that fluid gas content is high. Even through under the condition of low mean velocity, the built-in spring tubular reactor also has a good reaction effect. The built-in spring tubular reactor is suitable to be used for generating gas in the reaction process and forming the reaction process of gas-liquid two-phase flow.

The invention discloses a method for preparing large-diameter high-sphericity polymer hollow micro-spheres. The method has the advantages that curing speed reducing and rotary curing processes are organically combined with one another, curing containers are sealed in procedures for preparing polymer hollow micro-spheres by the aid of microfluidic technologies, the quantities of dual-emulsion particles in external water phases and the quantities of preliminarily added organic solvents are changed, diffusion of the organic solvents towards the external water phases can be suppressed by the aid of the solubility of the organic solvents in the external water phases, the curing speeds of dual-liquid droplet can be reduced, and spheroidization of the dual-emulsion particles can be promoted; horizontal inclination angles, rotation modes and the rotational speeds of rotary flasks are controlled, accordingly, dispersion states of the dual-emulsion particles in the external water phases can be controlled, adhesion, coalescence and emulsion breaking of the dual-emulsion particles due to mutual collision can be prevented, non-spheroidization tendency of the dual-emulsion particles can be lowered, and the large-diameter high-sphericity polymer hollow micro-spheres can be prepared; the large-diameter high-sphericity polymer hollow micro-spheres can be applied to laser inertial confinement fusion physical experiments.

A flotation plant comprises air supply means with which air bubbles can be supplied to a basin to which untreated water is supplied so as to cause flakes suspended in the untreated water to float by aid of the air bubbles; the air supply means includes strip- or plate-shaped aeration means having perforated membranes and to be installed in the bottom region of said basin.

The invention discloses an oscillatory flow reactor of a packed bed. The oscillatory flow reactor comprises an oscillation generating mechanism, an inlet segment, a reaction segment and an outlet segment which are sequentially connected, wherein the inlet segment is composed of an air inlet segment and a liquid inlet segment which are connected in series, and the outlet segment is composed of an air outlet segment and a liquid outlet segment which are connected in series; the air inlet segment is provided with an air feeding hole and an air distributor located at the downstream of an air discharging hole; the liquid inlet segment is provided with a liquid feeding hole and a liquid distributor located at the downstream of a liquid discharging hole; the reaction segment is provided with a vertically-arranged reaction tube which is filled with filler or solid catalyst particles in the middle, a supporting device at the bottom and a pressing device at the top. The oscillatory flow reactor of the packed bed is suitable for industrial gas-liquid reaction taking the liquid phase as a main body, gas-liquid-liquid reaction or gas-liquid-solid three-phase reaction system containing a solid catalyst and can continuously and stably operate for a long term.

The invention relates to surface cationized silicon dioxide nanoparticles. A preparation method comprises the following steps: weighing dialkyl dimethyl tertiary amine and putting the dialkyl dimethyltertiary amine into a three-neck flask; adding absolute ethyl alcohol, and stirring and slowly heating the mixture in an oil bath pan; continuing to dropwise add 3-chloropropyltrimethoxysilane, and introducing nitrogen for a period of time; maintaining the temperature, and carrying out reflux reaction to obtain a silicon dioxide particle modifier; uniformly mixing absolute ethyl alcohol, purifiedwater and ammonia water, putting the mixture into a three-neck flask, stirring the mixture, and uniformly mixing and quickly pouring tetraethoxysilane, the prepared silicon dioxide particle modifierand absolute ethyl alcohol into the three-neck flask; increasing the stirring speed for a period of time, reducing the stirring speed when the solution is milky white, continuously performing a reaction for a period of time, and terminating the reaction; and centrifuging, washing, drying and crushing the reaction product to obtain white powdery cationized nano silicon dioxide particles. The foam stabilizer can generate a synergistic effect with a surfactant to achieve an effect of stabilizing foam, so that the adaptation degree to a high-temperature stratum environment is greatly improved.

The invention provides a composite ammonia nitrogen removal agent. The composite ammonia nitrogen removal agent comprises the following components by weight percent: 53-86 percent of nano particles and 14-47 percent of organic alcohols. The 0.11-0.19g/L composite ammonia nitrogen removal agent is put into waste water to be uniformly mixed, so that the ammonia nitrogen removal agent can be used for sewage treatment. By the removal agent, the ammonia nitrogen in ammonia nitrogen waste water with high concentration can be effectively removed, and the removal rate is up to 92-99.99 percent; and moreover, the composite ammonia nitrogen removal agent is low in operation cost, easy to acquire, low in gas-liquid ratio and short in reaction time.

The invention provides an oil well de-blocking agent as well as a preparation method and application thereof. The oil well de-blocking agent is prepared from the following ingredients through being metered by regarding the total weight of the de-blocking agent as 100 percent: 30 to 45 percent of aromatics solvents, 30 to 45 percent of kerosene, 15 to 20 percent of oil soluble penetrating agents and 5 to 10 percent of nonionic surfactants. Compared with the existing oil well de-blocking agent, the oil well de-blocking agent has the advantages that the open flash point can reach a value being 50DEG C or above; the safety is high; the preparation process is simple; the de-blocking efficiency on asphaltene and colloidal sediments is high; the solution after the de-blocking does not need to bedischarged out and can directly enter a ground surface manifold system; safety and environment protection are realized; the de-blocking agent is applicable to the oil well and near-well zone blockingmaterial de-blocking in the oil well mining process.

The invention relates to an airlift reactor for treating soybean oil refining waste water by viscid trichosporon cutaneum, and belongs to the technical field of waste water treatment. Aiming at the features of the soybean oil waste water, the airlift reactor which can not only realize the soybean oil refining waste water treatment and resource utilization but also obviously improve the waste watertreatment efficiency for treating soybean oil refining waste water by viscid trichosporon cutaneum is designed. A water bath jacket is coated outside a reaction tank; a heat insulation water inlet and a heat insulation water outlet are formed in the water bath jacket; a tube body is arranged inside the reaction tank body through a support block, wherein the upper part and the lower part of the tube body are communicated with the reaction tank body; the upper half part of the tube body is a low pH region; the lower half part is a high PH region; an air pipe passes through the reaction tank body and the air outlet of the tube body is arranged between the low PH region and the high PH region; in addition, the air outlet is upward; a gas distributor is arranged in an air outlet position of the air pipe; a cyclone plate is arranged at the upper end of the tube body. The air is used as thrust for realizing a multi-flow-phase reactor realizing the water circulation flowing and no need of mechanical stirring and pump lifting. The airlift reactor has the characteristics of simple structure, low energy consumption and the like, and can be widely applied to various fields of biological engineering, energy chemical industry, environment protection and the like.

The invention discloses a high-stability oil displacement foam system, which comprises a foaming agent, a stabilizer and water, the foaming agent comprises sodium benzenesulfonate, the stabilizer comprises graphene oxide nanosheets, and the water comprises ionized water. By adding the graphene oxide nanosheets, the graphene oxide nanosheets are adsorbed on a gas-liquid interface forming bubbles, so that gas diffusion is reduced, meanwhile, the nanosheets can be retained at a Plaateau boundary to prevent liquid in a liquid film from being rapidly separated out, and the stability of the foam isgreatly improved; the amphipathy of the graphene oxide nanosheet plays a role in surface activity at the same time, so that the surface tension of the system is reduced, the foam is more stable, and the foaming performance of the system is also improved; the graphene oxide nanosheets can also be adsorbed on the surfaces of tiny oil drops dispersed in the liquid, so that the oil drops are preventedfrom coalescing, and the emulsifying and oil washing performance of a foam system is improved. The preparation method is simple and controllable in process, high in product conversion rate and few inbyproducts, and can be widely applied to actual production.

The invention discloses an effective production process for a shallow medium-high permeability super heavy oil reservoir. The process comprises the following steps of emulsifying an oil-soluble viscosity reducer and water into O/W emulsion, wherein the stabilizing time of the emulsion is controlled to be over 2 days; injecting the O/W emulsion into an oil layer; closing a well for reaction, wherein the well closing time is over 3 days; and injecting steam and soaking the well. The injected oil-soluble viscosity reducer emulsion is a thermodynamic unstable system, so that the oil-soluble viscosity reducer is gradually released after construction is finished; and according to the principle of similarity and intermiscibility, the released oil-soluble viscosity reducer acts with crude oil to realize permanent viscosity reduction. The invention also discloses oil-soluble viscosity reducer emulsion which consists of the oil-soluble viscosity reducer and water containing a water-based emulsifier and is O/W emulsion. By the process, the super heavy oil reservoir is changed into a super heavy oil reservoir or even a common heavy oil reservoir in a production range, so that the injection amount of steam can be greatly reduced, energy consumption is greatly reduced, and the requirements of low cost and low energy consumption are met.