844 results about "Divinylbenzene" patented technology

In one aspect, this invention relates to the use of thermoset nanocomposite particles as components of drilling fluid, drill-in fluid, completion fluid, and workover fluid additive packages to reduce fluid losses to a formation and / or to enhance a wellbore strength. In another aspect, this invention relates to the use particles of specific gravity ranging from about 0.75 to about 1.75 as components of drilling fluid, drill-in fluid, completion fluid, and workover fluid additive packages to reduce fluid losses to a formation and / or to enhance a wellbore strength. Using embodiments of the invention, reduction of fluid loss and / or enhancement of wellbore strength may be achieved while working with water-based, oil-based, invert emulsion, or synthetic drilling muds. The currently most preferred embodiments of the invention use substantially spherical thermoset nanocomposite particles, possessing a specific gravity from approximately 1.02 to approximately 1.15 wherein the matrix is a terpolymer of styrene, ethylvinylbenzene and divinylbenzene, and wherein carbon black particles possessing a length that is less than about 0.5 microns in at least one principal axis direction are incorporated as a nanofiller.

Extremely hydrophobic nitric oxide (NO) releasing polymers are disclosed. The extremely hydrophobic NO-releasing polymers provided are extensively cross-linked polyamine-derivatized divinylbenzene diazeniumdiolates. These polymers can be loaded with extremely high NO levels and designed to release NO in manners than mimic natural biological systems. The NO-releasing extremely hydrophobic polymers provided can maintain a sustained NO release for periods exceeding nine months. Also provided are related medical devices made using these NO-releasing extremely hydrophobic polymers.

Extremely hydrophobic nitric oxide (NO) releasing polymers are disclosed. The extremely hydrophobic NO-releasing polymers provided are extensively cross-linked polyamine-derivatized divinylbenzene diazeniumdiolates. These polymers can be loaded with extremely high NO levels and designed to release NO in manners than mimic natural biological systems. The NO-releasing extremely hydrophobic polymers provided can maintain a sustained NO release for periods exceeding nine months. Also provided are related medical devices made using these NO-releasing extremely hydrophobic polymers.

The invention discloses a novel polymer-based composite and a preparation method of the composite material as well as a method for deep fluorine removal of a water body, belonging to the fields of drinking water and industrial wastewater treatment, and environment function materials. The substrate of the composite is styrene-divinylbenzene copolymerized spheres, and nanometre zirconia hydrate particles are uniformly distributed in the holes of the spheres. The method for deep fluorine removal of the water body comprises the following steps of: (a) filtering fluorine-containing wastewater, and adjusting the pH of a filtrate to 3.0-8.0; (b) passing the filtrate through an adsorption tower in which a novel polymer-based composite material is filled; and (c) stopping adsorption in the case that the concentration of fluorine ions in effluent achieves a leakage point, performing adsorption regeneration on the novel polymer-based composite material in the adsorption tower by virtue of a NaOH-NaCl mixed solution, and then standing for recycling after regeneration. According to the invention, the pre-concentration effect of a polymer substrate and the selective fluorine removal performance of nanometre zirconia hydrate are organically combined, thus the adsorption capacity and the selectivity of the material on fluorine ions are effectively improved.

Production of methyl-methyl acrylate from methanal is carried out by reacting methanal with propanal in diethylamine muriate solution at 40-45 degree to obtain methyl-acryl, mixing methyl-acryl with methanol in proportion of 30-50:1, adding them into reactor, adding into 2.0-4.0% catalyst, inducing into oxygen at 40-60 degree and flow 10 ml / min, reacting for 4-6 hrs and synthesizing to obtain final product. The catalyst carrier is styrene-divinylbenzene polymer organic resin, which consists of palladium 2-5 wt%, bismuth 0-3 wt%, lead 0.3-1 wt% and iron 0.3-1 wt%. It's cheap, has friendly reactive environment, better selectivity and conversion rate.

The invention discloses a nano-compound adsorbent for efficiently removing trace phosphorus, arsenic and antimony from a water body, belonging to the technical field of environment functional materials. The organic framework of the nano-compound adsorbent of the invention is hypercrosslinked styrene-divinylbenzene ion exchange resin, a functional group for surface binding of the organic framework is a quaternary ammonium group or pyridyl, nano-inorganic functional particles are loaded, and the total volume of 1-20nm nano-pores accounts for greater than or equal to 90% of the total volume of all the pores of the organic framework. The nano-inorganic functional particles are nano-hydrated ferric oxide or nano-hydrated manganese oxide. The nano-compound adsorbent of the invention has more obvious nano effect, strong reaction activity, great adsorption capacity and high selectivity, well solves the defects of obvious swelling, weak adsorption reaction activity, small adsorption capacity, lower adsorption selectivity and the like of the existing nano-compound adsorbent, and is more suitable for advanced treatment of micro-pollution of water and waste water.

In one aspect, the invention relates to a method for “tagging” proppants so that they can be tracked and monitored in a downhole environment, based on the use of composite proppant compositions containing dispersed fillers whose electromagnetic properties change at a detectable level under a mechanical stress such as the closure stress of a fracture. In another aspect, the invention relates to composite proppant compositions containing dispersed fillers whose electromagnetic properties change under a mechanical stress such as the closure stress of a fracture. The currently preferred embodiments use substantially spherical thermoset nanocomposite particles where the matrix comprises a terpolymer of styrene, ethylvinylbenzene and divinylbenzene, a PZT alloy manifesting a strong piezoelectric effect or Terfenol-D manifesting giant magnetostrictive behavior is incorporated to provide the ability to track in a downhole environment, and carbon black particles possessing a length that is less than 0.5 microns in at least one principal axis direction may optionally be incorporated as a nanofiller.

A resin composition includes (A) 100 parts by weight of epoxy resin; (B) 20 to 100 parts by weight of polybutadiene styrene divinylbenzene graft terpolymer resin; (C) 2 to 20 parts by weight of di-tert-butylhydroquinone (DTBHQ); (D) 5 to 50 parts by weight of polyphenyl ether modified cyanate ester resin; and at least one of (E) inorganic filler, (F) chain extending sealing agent, and (G) catalyst. The resin composition is characterized by specific ingredients and proportions thereof to attain high heat resistance, low dielectric constant Dk, and low dielectric dissipation factor Df, and being halogen-free, and therefore is applicable to protective film of printed circuit boards, insulating protective film of electronic components, and resin insulation film of leadframes.

A method for “tagging” proppants so that they can be tracked and monitored in a downhole environment, based on the use of composite proppant compositions comprising a particulate substrate coated by a material whose electromagnetic properties change at a detectable level under a mechanical stress such as the closure stress of a fracture. In another aspect, the invention relates to composite proppant compositions comprising coatings whose electromagnetic properties change under a mechanical stress such as the closure stress of a fracture. The substantially spherical composite proppants may comprise a thermoset nanocomposite particulate substrate where the matrix material comprises a terpolymer of styrene, ethylvinylbenzene and divinylbenzene, and carbon black particles possessing a length that is less than 0.5 microns in at least one principal axis direction incorporated as a nanofiller; upon which particulate substrate is placed a coating comprising a PZT alloy manifesting a strong piezoelectric effect or Terfenol-D manifesting giant magnetostrictive behavior to provide the ability to track in a downhole environment.

A process for preparing a divinylarene dioxide comprising reacting a divinylarene, such as divinylbenzene, with hydrogen peroxide in the presence of a solvent and in the presence of a catalyst to from a divinylarene dioxide; wherein the hydrogen peroxide is present in the reaction mixture in an excess or an equivalent mole ratio per mole of divinylarene.

An anion transport membrane is provided, which is based on a linear polymer electrolyte with anion-exchange groups that mechanically reinforced by a covalently cross-linked network. The linear polymer electrolyte is partially or fully miscible with the second covalently cross-linked network. In another example, an anion transport membrane is provided, which is based on a linear quaternary ammonium polysulfone membrane backbone mechanically reinforced by a chemically-crosslinked network of poly(styrene-co-divinylbenzene), whereby the reinforcing network has covalent divinylbenzene cross-links.

The invention relates to ionic liquid extraction resin capable of realizing high-efficiency recycling of rare earth as well as preparation and an application method of the ionic liquid extraction resin. The ionic liquid extraction resin has a designable zwitterion structural characteristic; the physical and chemical property of the ionic liquid extraction resin can be regulated and controlled by changing the structure or the type of zwitterions, so that the problems of the conventional extraction resin has a single function and the conventional extraction agent is low in stability are solved; and the ionic liquid extraction resin can be used for recycling and separation of rare earth in a solution. According to the preparation method of the ionic liquid extraction resin, syrene anion exchange resin is used as a carrier material, and an acidic phosphine extraction agent is introduced into a syrene-divinylbenzene framework under the action of a non-covalent bond, so that the ionic liquid extraction resin modified by the acidic phosphine extraction agent is obtained. The ionic liquid extraction resin provided by the invention can effectively recycle rare earth ions, is high in adsorption rate and adsorption selectivity to the rare earth ions and can be used for the separation and the recycling of the rare earth in a complicated system.

The invention provides a method for preparing superhigh-specific-area monodisperse polymer microspheres, which comprises the following steps: adding monomer, divinylbenzene, vinyl benzyl chloride, deionized water, initiator azodiisobutylamidine hydrochloride and co-stabilizer cetyl alcohol into a reaction vessel, carrying out ultrasonic dispersion in a cell crusher for 3 minutes, heating to 70 DEG C, reacting for 12 hours, centrifuging, washing and drying to obtain lightly-crosslinked monodisperse prepolymer microspheres; and swelling the monodisperse prepolymer microspheres, dispersion medium and Lewis acid catalyst at room temperature for 24 hours, heating to 80 DEG C, reacting for 8 hours, centrifuging, washing and drying to obtain the superhigh-specific-area monodisperse polystyrene microspheres. The particle size of the polystyrene microspheres is 600-750 nm, and the particle size distribution coefficient is less than 8.5; the maximum specific area can reach 1255 m<2> / g, and the maximum pore volume can reach 0.78 cm<3> / g; the average pore size is 2.3-2.7 nm, and the pore size distribution is narrow; and the maximum adsorption capacity for hydrogen can reach 2.15 wt%.

This invention relates to a process for preparing bisphenol A by the condensation of phenol with acetone in the presence of cation exchange resin obtained by sulfonating copolymers of monovinyl monomers mainly consisting of styrenes and divinyl monomers as crosslinking agent while using divinylbiphenyl and divinylbenzene mainly as said divinyl monomers and controlling the molar ratio of divinylbiphenyl to divinylbenzene at 10 / 0-2 / 8. The cation exchange resin to be used as catalyst in the condensation reaction shows a long life, maintains the production of bisphenol A over a long period of time, possesses high strength and is useful for economical and advantageous production of bisphenol A.

The invention relates to the field of rectification and purification; at present, a conventional multi-stage rectification technology is adopted in existing polycrystalline silicon production to purify trichlorosilane, rectification stages are multiple, reflux ratio is large, energy consumption is large and device investment is high; in order to overcome the problems, a technical scheme in the invention adopts a novel process of combining resin adsorption with multi-stage rectification. Coarse trichlorosilane is pre-cooled and cooled, and pumped into an adsorbing device with special divinylbenzene resin by a pump to remove boron and phosphor impurities; and then, rectification is carried out on the adsorbed trichlorosilane liquor in a three-level rectification tower to obtain the high-purity trichlorosilane. The production process disclosed by the invention not only achieves the purpose in the invention, but also has high trichlorosilane purity, lower rectification separator impurity content and can recycle the trichlorosilane for use in disproportionated reaction, so that energy consumption is further lowered, and material utilization rate is improved.

The invention provides a method for the preparation of the composite chromatographic stuffing of the polymer carbon nanometer tube, comprising: taking polystyrene-divinylbenzene and carbon nanometer tube as the base material, adopting the dispersion polymerization method to prepare monodispersity linear polystyrene microsphere seed, activating the feed, taking uni-step seed swell method to prepare the polystyrene-divinylbenzene and carbon nanometer tube composite microsphere, extracting to remove the pore-foaming agent to obtain the chromatographic stuffing, packing column by the uniform method. The stuffing prepared by the method has uniform granularity without screening and enhanced hardness compared with the traditional polymer chromatographic stuffing, can bear bigger pressure and is suitable for the new UPLC. The obtained polystyrene-divinylbenzene and carbon nanometer tube liquid phase chromatographic column can be stably used for the ion-pair chromatograph for along time and better performs the simultaneous separation of over ten organic acids.

The invention provides a preparation method of an N-vinyl pyrrolidone and a divinylbenzene copolymerization monodisperse microsphere, which takes the polystyrene monodisperse microsphere that is prepared from dispersion polymerization as a seed, the N-vinyl pyrrolidone, acrylic ester and other comonomers are guided during the swelling copolymerization process, so the corresponding copolymerization microsphere is produced. The copolymerization microsphere which is prepared from the method has easily-controlled state and performance, and meanwhile, the uniformity and productivity of the product size distribution are increased.

The invention relates to a preparation method of rare earth element modified and aldehyde removed resin and an application of the rare earth element modified and aldehyde removed resin in ethylene glycol refining. According to the preparation method, styrene is taken as a monomer, divinylbenzene is taken as a crosslinking agent, benzoyl peroxide is taken as an initiator, polyvinyl alcohol is taken as a suspending agent, water is taken as a reaction medium, and the components react in a suspension polymerization manner at the temperature of 85-95 DEG C; a polymer obtained after reaction is dissolved in dichloroethane for swelling, sulfuric acid is added for a sulfonation reaction, and cation exchange resin is obtained; and a nitric acid solution of the rare earth element is added into the cation exchange resin, and the rare earth element is chemically bonded to the resin to obtain the spherical modified and aldehyde removed resin. A fixed bed reactor is filled with the aldehyde removed resin, ethylene glycol is refined at the temperature of 60-70 DEG C, the density of a resin packing layer heap is 400-600 kg / m<3>, the reaction pressure is 0.4 MPa, under the catalytic action of the modified and aldehyde removed resin, impurity aldehyde and ethylene glycol have a condensation polymerization reaction and produce a product that does not influence an ethylene glycol product, and obtained ethylene glycol has high purity.

The invention discloses a low-energy-consumption preparation method of pitch-based spherical active carbon, belonging to the technical field of spherical active carbon. The preparation method comprises the main steps of: mixing benzoyl peroxide, divinylbenzene, styrene, diethylbenzene and pitch powder with a softening point of 240-280 DEG C and the grain size of 150-200 meshes; and suspending in a polyvinyl alcohol dispersion liquid to form balls, curing the balls by using a hydrothermal method to form original carbon balls, calcining original carbon balls in a segmental manner and activating to obtain the pitch-based spherical active carbon. The low-energy-consumption preparation method of the pitch-based spherical active carbon, disclosed by the invention, has the advantages and benefits of fast curing speed, low needed temperature, low energy consumption and saved production time as the benzoyl peroxide, divinylbenzene and styrene are adopted as curing agents for curing the pitch. The pitch-based spherical active carbon prepared by the method has the specific surface area of 650-1200 sq.m. / g and the grain size of 300-800 microns and has good sphericity.

The invention relates to a method for preparing magnetic porous polystyrene microspheres on the basis of suspension polymerization, belonging to the technical field of preparation of environmental functional materials. The method comprises the following steps: synthesizing Fe3O4 magnetic particles by a solvothermal process; and preparing magnetic porous polystyrene microspheres by suspension polymerization by using styrene and divinylbenzene as functional monomers, azodiisobutyronitrile as an initiator and toluene and cyclohexanol as pore-forming agents. The obtained microspheres have abundant pores on the surface, thereby being beneficial to enhancing adsorbability; and the Fe3O4 magnetic particles inside the microspheres have magnetic stability, and can be quickly separated under the action of an external magnetic field. The adsorbent is used in a water environment for selectively adsorbing 2,4-dichlorophenol and 2,6-dichlorophenol. The static adsorption experiment result indicates that the magnetic porous microspheres prepared by the method have the advantages of favorable adsorption capacity, quick adsorption kinetic property and favorable regenerability.

The invention relates to an electrophoresis particle of polymer dye (pigment) for electronic ink and a preparation method thereof, and belongs to technology of electrophoresis particle preparation. The electrophoresis particle uses dye as an initial raw material, and is prepared according to the following proportion that: the mass ratio of the dye to acryloyl chloride is 1:1-10; the mass ratio of the dye to styrene is 1:1-20; the mass ratio of the dye to divinylbenzene is 1:0.5-10; and the mass ratio of the dye to an initiator AIBN is 1:0.01-0.05. The preparation method comprises the following steps: carrying out functionalized modification on dye acidylation by acryloyl chloride in methylene dichloride to lead the dye to carry a polymerizable functional group; then, leading the dye to perform a polymerization reaction with styrene in ethanol for 4 to 12 hours by taking AIBN as the initiator and the divinylbenzene as a cross-linking agent to prepare the particle with particle diameter of between 200 and 300nm. The electrophoresis particle and the preparation method have the advantages of simple process, accessible raw materials, even particle diameter of the prepared colorful electrophoresis particle and good degree of sphericity. The electrophoresis particle of the organic polymer dye (pigment) not only maintains the advantages of bright color and proper density of the organic dye, but also overcomes the defects uneven shape of the organic dye particle, poor movement effect in disperse liquid under the action of an electric field.

The invention relates to the field of organic polymer materials, in particular to a polystyrene propping agent and a preparation and application thereof. The invention aims to provide the polystyrene organic polymer propping agent which can achieve the purpose of increasing oil-gas well output and prolonging oil-gas well fracturing usable life through changing the composition of the propping agent. The propping agent comprises the following components in parts by weight: 100 parts of monomer, 0.11-8 parts of an initiator, 2-10 parts of an inorganic dispersing agent, 2-7 parts of an organic dispersing agent, 0.2-1 part of a reinforcing agent, 200-500 parts of deionized water, and 0.8-3 parts of a surface active agent, wherein the monomer is phenethylene or a mixture of phenethylene and divinylbenzene. The polystyrene propping has the advantages of low specific gravity, no electrostatic, less probability of smashing, low cost, no pollution and the like.

The invention relates to a preparation method of secondarily-crosslinked adsorption resin. The preparation method includes a secondary crosslinking step in which polystyrene resin chloromethylated bead is subjected to a secondary crosslinking reaction to obtain the secondarily-crosslinked adsorption resin. The secondary crosslinking step includes a still-standing and swelling process, in which 1 part by weight of the polystyrene resin chloromethylated bead, 0.5-4 parts by weight of an alcohol substance and 4-6 parts by weight of 1,2-dichloroethane are added to perform the still-standing and swelling process. The secondarily-crosslinked adsorption resin is used for blood purification. Through the preparation method, residual chloromethyl groups in ultrahigh-crosslinked polystyrene-divinylbenzene resin, thereby increasing chemical stability and blood compatability of the adsorption resin.

A production method of a porous resin or an intermediate therefor, which comprises a step of producing a styrene-acyloxystyrene-divinylbenzene copolymer comprising suspension copolymerization of a styrene monomer, an acyloxystyrene monomer and a divinylbenzene monomer using an organic solvent and water, and a step of converting the styrene-acyloxystyrene-divinylbenzene copolymer to a styrene-hydroxystyrene-divinylbenzene copolymer, wherein a chain transfer agent is added to the suspension copolymerization system.

The invention discloses a SiC matrix composite material element and the online connection and preparation method. The element is connected into a whole by the connecting piece through the connection layer at the connector lug, which is characterized in that the component of the connection layer is pure SiC material and the SiC material uses the mix solution of PCS and divinylbenzene as the adhesive, and uses SiC fine power as the packing medium, and can be achieved though preceramic polymer pyrolysis; SiC matrix composite material element with stronger connection strength can be gained through the auxiliary connection and the reinforcement of the fastener of SiC matrix composite material. The SiC matrix composite material element and the online connection and the preparation method has the advantages of simple and practical preparation method, low cost, good thermostable performance and mechanics compatibility, good structural integrity. The connecting preparation method is especially suitable for the connection formation and preparation of large-scale complex components.

The invention discloses a high compressive polystyrene-co-octadecyl methacrylate copolymer resin microsphere which is a crosslinking copolymer prepared by taking divinylbenzene as a cross-linking agent, taking styrene as a first monomer, taking octadecyl methacrylate as a second monomer and adding a pore-foaming agent. According to the high compressive polystyrene-co-octadecyl methacrylate copolymer resin microsphere, a long-chain flexible monomer of the octadecyl methacrylate is introduced to be copolymerized with the styrene, and therefore, the compressive strength of the resin microsphere as parents of ion exchange resin or adsorbent resin is obviously improved, the strength increase efficiency reaches more than a dozen times, and the resin microsphere cannot be crushed on account of structural defects per se in the use process.

The invention discloses a headspace gas chromatography detection method of residual solvents in a macroporous resin extract, which can be used for simultaneously measuring normal hexane, benzene, methylbenzene, methylcyclohexane, dimethylbenzene, styrene and divinylbenzene in the macroporous resin extract. The method comprises the following steps of: (1) carrying out tests of chromatographic conditions and system suitability; (2) preparing a comparison product solution; (3) preparing a test product solution; and (4) measuring. The specificity, the system suitability, the linearity, the precision, the minimum detection limit, the recovery rate, and the like of the method all meet the requirements of drug quality standard analysis method verification and guiding principles in the first appendix of the Chinese pharmacopoeia (Version 2005).

The invention provides a method for preparing polystyrene-divinylbenzene microspheres 60 to 100 microns in diameter, and a use thereof for blood purification. Polymer microspheres prepared are synthesized by swelling and polymerizing seed emulsion. Seeds microspheres used are large-diameter linear polystyrene microspheres 6 to 8 microns in diameter. Monomer and cross-linking agent used are styrene and divinyl benzene respectively. Pore-forming agents used are toluene, ethylbenzene, o-phthalic acid lipids, n-heptane, n-octane, n-heptanol or a mixture of the substances. The polymer microspheres prepared are used to remove bilirubin during blood purification. The microspheres prepared have the characteristics of cross-linked multihole, high specific surface area (between 100 and 1,000 m<2> / g), stable mechanical strength, high yield of preparation process, use for blood purification and bilirubin adsorption, small pressure drop of adsorption column, high removal rate and the like.