87 results about "Aqueous reaction" patented technology

A self-stabilized glyoxalated polyacrylamide (gPAM) resin composition is disclosed. The gPAM resin composition consists essentially of an aqueous reaction product of a cationic polyacrylamide (cPAM) prepolymer and glyoxal carried out in an aqueous reaction mixture having a total solids of less than a critical concentration of the gPAM resin and a pH of at least about 7.5. The cPAM prepolymer comprises a weight average molecular weight (Mw) of at least about 5,000 Da and a cationic monomer content of at least about 4, alternatively at least about 10 mol %. The reaction product is prepared without addition of any acid. The gPAM resin composition maintains a substantially single phase for a stability period of at least about 1 day after preparation, without the addition of any acid or other stabilizing compounds. Methods of preparing and using the gPAM resin composition are also disclosed.

There is provided an ink jet recording method for recording an image on a recording medium with an aqueous ink and an aqueous reaction liquid containing a reactant that reacts with the aqueous ink. The aqueous ink contains a pigment dispersed by the action of a carboxylic acid group, a resin particle and a water-soluble organic solvent. The rate of increase in the particle size of the pigment dispersed by the action of the carboxylic acid group when the pigment comes into contact with the aqueous reaction liquid is 8.0 times or more. The amount of water absorbed by the recording medium from the start of contact to 30 msec1 / 2 in a Bristow method is 10 mL / m2 or less.

The present invention relates to a process for the preparation of substituted 4-(N′-hydroxy-carbamimidoyl)benzoic acids, which can be obtained by nitrilase catalyzed hydration of substituted terephthalonitriles of formula (II) in an aqueous medium to afford (ammonium) 4-cyanobenzoic acids (IIa). The hydration is followed by treatment of the aqueous reaction medium with hydroxylamine or a salt thereof to afford amidoximes (I).

The present invention relates to a method for purification and separation of solid-state carbon-containing material generated from electrolysis of a molten lithium carbonate elec- trolyte and recovery of lithium carbonate The method comprises obtaining a solid reaction product formed from electrolysis of a molten lithium carbonate salt electrolyte. The solid reaction product is mixed with an aqueous source and carbon dioxide is introduced at a predetermined first pressure to produce carbon dioxide treated aqueous reaction product mixture. The temperature and pressure of the carbon dioxide treated aqueous reaction product mixture is controlled to produce solid-state carbon material and an aqueous solu- tion rich in lithium salts. The solid-state carbon is separated from the aqueous solution rich in lithium salts. Carbon dioxide stream, precipitated lithium carbonate and an aqueous solution poor in lithium salts are generated by controlling the pressure and temperature of the aqueous solution rich in lithium salts. The precipitated lithium carbonate is separated from the aqueous solution poor in lithium salts. The method further comprises one or more of: recycling the recovered precipitated lithium carbonate as a feed source for the molten lithium carbonate salt electrolyte; and / or recycling the recovered aqueous solution poor in lithium salts as at least a portion of the aqueous source.

The invention discloses an antistatic and antibacterial mixed fiber and a preparation method thereof, and belongs to the technical field of textile fabrics. The preparation method comprises the steps of fiber pretreatment, polycaprolactam graft modification, polyethylene glycol terephthalate graft modification, blending treatment and after-treatment. According to the invention, the PA6 (polycaprolactam) fiber is grafted and modified step by step to load quaternary ammonium salt, so that the long-acting antibacterial effect is realized; pET (polyethylene glycol terephthalate) fiber is grafted with a cationic monomer to construct an antistatic path, and the PET fiber and the cationic monomer are blended in a ratio of (6-7): (3-4), so that the performance and the mechanical strength are considered; a polythiophene conducting layer and silver-doped nano titanium sol are adopted in after-treatment, so that the surface is endowed with double antibacterial and efficient antistatic functions. According to the process, the environmental protection property and the production efficiency are remarkably improved through a water-phase reaction system and a padding-baking method, and the function retention rate is larger than or equal to 90% after 50 times of washing.

A method can include heating an aqueous reaction mixture comprising a silicon source and a boron source and / or an aluminum source in the presence of a quaternary structure directing agent to a temperature of at least 75° C. to produce a zeolite. A composition can include a borosilicate zeolite, an aluminosilicate zeolite, or an aluminoborosilicate zeolite having a framework symmetry of C2 / m and a unit cell with measurements of a of 3.5 Å to 4.5 Å, b of 20.1 Å to 21.1 Å, c of 15.5 to 16.5 Å, and β of 97° to 98°.

A low-cost, resource-saving, easy-to-perform, preferably harmless and fault-tolerant process is disclosed with which a durable, robust, chemically and mechanically stable heat exchanger element with advantageous thermohydraulic and magnetic properties can be produced. The method comprises:providing a magnetocaloric substrate with a plurality of channels or pores which preferably form continuous channels,immersion of the substrate in a tempered aqueous reaction solution, which leads to an autocatalytic-chemical deposition of a metal coating on the surface of the substrate.

The invention discloses a copper-clad plate, a resin composition for the copper-clad plate, spherical silicon and a preparation process of the spherical silicon, and belongs to the technical field of copper-clad plates. The spherical silicon is composed of spherical silicon dioxide and zinc molybdate particles growing on the surface of the spherical silicon dioxide in an in-situ dispersion mode, the diameter of the spherical silicon dioxide is smaller than 10 micrometers, D50 ranges from 0.6 micrometer to 6 micrometers, the content of zinc molybdate in the unit area of the surface of the spherical silicon dioxide is 0.03 g / m < 2 > to 1 g / m < 2 >, and the size of the zinc molybdate particles is smaller than or equal to 400 nm. The preparation process comprises the following steps: contacting / mixing spherical silicon dioxide with soluble molybdate and zinc salt in a water-based reaction system; and carrying out in-situ reaction on soluble molybdate and zinc salt on the surface of the spherical silicon dioxide to form spherical silicon chemically coated with zinc molybdate particles. According to the method, the zinc molybdate is directly synthesized on the surface of the spherical silicon dioxide in situ through a hydrothermal method, so that the structural morphology of the obtained spherical silicon and the size of zinc molybdate particles can be effectively controlled, and further it is guaranteed that drill bit abrasion is effectively improved when the copper-clad plate is drilled.

The present application relates to the technical field of copper clad laminates, and discloses a copper clad laminate, a resin composition for the copper clad laminate, and spherical silicon and a preparation method therefor. The spherical silicon of the present application is composed of spherical silicon dioxide and zinc molybdate particles dispersedly grown on the surface of the spherical silicon dioxide in situ and has a diameter of less than 10 microns and a D50 of 0.6-6 microns. The content of zinc molybdate per unit area on the surface of the spherical silicon dioxide is 0.03-1 g / m2, and the size of the zinc molybdate particles is less than or equal to 400 nm. The preparation method comprises: enabling spherical silicon dioxide to come into contact with / be mixed with a soluble molybdate and a zinc salt in an aqueous reaction system; and reacting the soluble molybdate with the zinc salt in situ on the surface of the spherical silicon dioxide, so as to form spherical silicon chemically coated with zinc molybdate particles. In the present application, by directly synthesizing the zinc molybdate in situ on the surface of the spherical silicon dioxide by means of a hydrothermal method, the structural morphology of the obtained spherical silicon and the size of the zinc molybdate particles can be effectively controlled, thereby ensuring that the wear of a drill bit during the drilling of the copper clad laminate is effectively mitigated.

The present invention relates to an improved process for preparing guanidinoacetic acid (GAA) by reacting cyanamide with an excess molar amount of glycine in an aqueous reaction mixture in the presence of a base, which avoids high molar amounts of base or acid to control the pH value while maintaining the reaction selectivity and product yield.

The invention relates to the technical field of preparation of high-purity inorganic nano materials, and discloses a controllable preparation method of a high-purity cadmium telluride nanocrystal, which comprises the following steps: pre-dissolving a conjugated acid salt in a water-phase reaction system, and reacting a cadmium salt precursor with a tellurium source precursor when ammonia gas is introduced as an inorganic gaseous ligand; a pH buffer system is constructed by ammonia gas and conjugated acid salt, and transient stability is provided for the generated cadmium telluride nanocrystals within the pH range for inhibiting the cadmium hydroxide impure phase; according to the method disclosed by the invention, an in-situ pH buffer system is constructed, so that a ligand stabilization function of the ammonia gas is decoupled from an alkaline side reaction phase of the ammonia gas, agglomeration is prevented while an impure phase is inhibited, the ligand and the salt are thoroughly removed after the reaction, and the technical problem that controllability and high purity cannot be obtained at the same time in an inorganic aqueous phase method is solved.

Described herein is a method of making a metal-organic framework (MOF) compound comprising a MOF metal and a MOF linker. The method includes forming a mixture comprising a MOF metal precursor, a MOF linker precursor, a solvent, and optionally a base. The method further includes reacting the mixture under reaction conditions selected from the group consisting of ambient reaction pressure, mixture temperature below about the boiling point of the solvent, aqueous reaction mixture, and combinations thereof. Also described herein is an MOF compound prepared according to the method.

The present invention provides an ink set containing water-based ink and a reaction solution, which is less prone to clouding of the reaction solution due to heat and over time, and which can record images with good scratch resistance and water scratch resistance. [Solution] An ink set comprising an aqueous ink and a reaction solution used in an inkjet recording method for recording an image on a recording medium using an aqueous ink and an aqueous reaction solution containing a reactant that reacts with the aqueous ink. The aqueous ink contains a resin. The reactant contains at least one selected from the group consisting of polyvalent metal salts and cationic resins. The reaction solution further contains an ionic surfactant and a crosslinking agent that can form a bond with the resin in the aqueous ink.

Levulinic acid and formic acid are valuable chemical intermediaries present in byproducts of some biomass conversion processes. Described herein are commercially viable processes for extracting levulinic acid and formic acid at high recovery. Under the present approach, levulinic acid and formic acid may be extracted from an aqueous reactor product, such as an acidic brine (e.g., calcium chloride brine) feed from a biomass hydrolysis reaction. If present, mineral acid catalysts may be recovered. Embodiments use solvents such as, e.g., 2-methyl tetrahydrofuran, for extracting levulinic acid and formic acid from the aqueous solution.

Orthodontic articles and polymerizable resin compositions are described. The orthodontic article comprises a cured composition comprising the reaction product of free-radically polymerizable resin comprising 30 to 70 wt. %, inclusive, of at least one urethane component, and 25 to 70 wt. %, inclusive, of reactive diluent(s) comprising at least one monofunctional (meth)acrylate monomer. The polymerizable resin comprises no greater than 35 wt. % of reactive diluent(s) having a high affinity for water. Reactive diluent(s) such as monofunctional (meth)acrylate monomers having a high affinity for water have low log P values. In one embodiment, the polymerizable resin comprises at least one acidic monomer.

The invention relates to the field of special functional finishing agents for textiles, and discloses water-based reaction type rapid moisture-conducting block silicone oil for textile finishing as well as a preparation method and application of the water-based reaction type rapid moisture-conducting block silicone oil. The water-based reaction type rapid moisture-conducting block silicone oil is a copolymer, and comonomers comprise double-end hydroxyl hydrogen-containing silicone oil, thermal deblocking type single-end-capped triisocyanate, polyether glycol, a hydrophilic / branched chain extender and single-end hydroxyl silicone oil. The block silicone oil disclosed by the invention is formed by copolymerizing specific monomers, has relatively good hydrophilicity and moisture conductivity, is easy to form a stable emulsion, and can endow a fabric with relatively good moisture absorption and quick drying properties after finishing the fabric.

The present invention relates to a method for preparing substituted 4-(N'-hydroxycarbamimidoyl)benzoic acid, which can be obtained by hydration of substituted terephthalonitrile of formula II in an aqueous medium catalyzed by nitrilase to provide 4-cyanobenzoic acid (ammonium) IIa. After hydration, the aqueous reaction medium is treated with hydroxylamine or a salt thereof to provide amide oxime I.

The invention discloses a phase interface controllable copper-based solid catalyst and a preparation method and application thereof, and belongs to the technical field of catalyst preparation and catalytic reaction engineering. According to the copper-based solid catalyst, metal salts are used as a copper source, a bismuth source and a manganese source, a bidentate complexing agent containing a C element is used as a guiding agent, the metal salts and the complexing agent are mixed and then self-assembled in advance in a solution to form a coordination complex, and then the coordination complex is dried and roasted to obtain the copper-based solid catalyst. The outer layer of the copper-based solid catalyst is a porous carbon shell layer with controllable hydrophilicity and hydrophobicity and thickness, and a copper center coordination site is coated and limited by a carbon layer; the outer layer of the active copper center of the copper-based solid catalyst is coated with a porous carbon shell layer with controllable gas-liquid-solid three-phase interface activity, so that hydration of a silicon-based carrier of an industrial catalyst in a water-phase reaction system can be overcome, and the stability of the catalyst is improved.

The invention discloses a hot-melt core-shell emulsion particle and a preparation method thereof, a treatment-free thermo-sensitive plate precursor containing the hot-melt core-shell emulsion particle, a treatment-free thermo-sensitive plate and application of the hot-melt core-shell emulsion particle and the treatment-free thermo-sensitive plate. The hot-melt core-shell emulsion particle comprises a core layer and a shell layer, and raw materials corresponding to a copolymerization unit of the core layer comprise styrene, acrylonitrile and a water-resistant reactive emulsifier; the corresponding raw materials of the shell layer copolymerization unit comprise vinyl oxetane, butyl methacrylate and a hydrophilic reactive emulsifier. The problem that the imaging capability, the on-machine developing capability and the pressrun of the treatment-free thermosensitive plate are difficult to consider at the same time is effectively solved.

An ink jet recording method includes a step of providing a recording medium with an aqueous ink containing a pigment dispersed by an action of an anionic group, a resin particle and a wax particle and an aqueous reaction liquid containing a reaction agent that reacts with the aqueous ink and a step of heating the recording medium provided with the aqueous ink and the aqueous reaction liquid. A heating temperature, a glass transition temperature of the resin particle and a melting point of the wax particle satisfy a predetermined relationship, average particle diameters of the pigment and the wax particle satisfy a predetermined relationship and anionic groups of the pigment, the resin particle and the wax particle satisfy a predetermined relationship.

To provide an inkjet recording method capable of recording an image excellent in sharpness, even when a plurality of ink is imparted to a hardly absorbable to non-absorbable recording medium in a superposed manner.SOLUTION: An inkjet recording method discharges first ink, second ink, a first reaction liquid and a second reaction liquid from a recording head, applies them to a recording medium in a superposed manner in at least a partial region of the recording medium, and records an image. The inkjet recording method includes: a first reaction liquid application step of applying the first reaction liquid to the recording medium; a first ink application step of applying the first ink to the recording medium after the first reaction liquid application step; a second ink application step of applying the second ink to the recording medium after the first ink application step; and a second reaction liquid application step of applying the second reaction liquid to the recording medium after the first ink application step. Surface tension of the second reaction liquid is higher than surface tension of the first reaction liquid.SELECTED DRAWING: None

The present invention relates to a method of making a fluoroelastomer [fluoroelastomer A] in an aqueous reaction medium free of fluorinated surfactants, said method comprising: a: forming a mixture comprising: i) water, ii) one or more fluorinated solvents having less than 0.1 mmol of ionic functionality / kg of solvent, and i) one or more fluorinated solvents having less than 0.1 mmol of ionic functionality / kg of solvent; the present invention relates to a composition comprising: i) one or more fluoroalkyl vinyl ethers (PAVEs) and preferably free of ionic functional groups, iii) a radical initiator, iv) monomers comprising tetrafluoroethylene (TFE) and one or more perfluoroalkyl vinyl ethers (PAVEs), v) optionally one or more chain transfer agents; b: initiating polymerization of said monomers, thereby forming a fluoroelastomer as a stable latex [fluoroelastomer A] wherein:-said mixture is free of fluorinated surfactants-the weight ratio between said fluorinated solvent or solvents and said water is from 0.1 to 10; -said fluoroelastomer A comprising from 30% to 85% by mole of recurring units derived from tetrafluoroethylene and from 5% to 50% by mole of recurring units derived from one or more PAVEs.

A method for preparing guanidino acetic acid involves reacting cyanamide and glycine in an aqueous reaction mixture in the presence of a base. The ammonia content in the reaction mixture is controlled to be below 20 g / L, and the dicyandiatrade content in the reaction mixture is kept below 5 wt.-%.

The present invention provides a nanopore detection device, a manufacturing method and an application based on a heating and sealing structure. The device includes: a barrier layer having a plurality of nanopores and having a common liquid chamber above; a cavity layer including a plurality of independent cavities, each independent cavity being correspondingly provided with a nanopore; a microchannel structure for injecting a solution; an oil-phase liquid sealing layer, the oil-phase liquid sealing layer forming an oil-water interface with the aqueous reaction solution in the independent cavity to seal and isolate the aqueous reaction solution in their respective independent cavities; a heating and sealing structure for forming an air-sealed cavity at the bottom of the independent cavity. The present invention seals and isolates the aqueous reaction solution in their respective independent cavities through the oil-phase liquid sealing layer, preventing possible cross-leakage of salt solutions between independent cavities and achieving the effect of sealing the independent cavities. At the same time, through the heating electrode, an air-sealed cavity is formed at the bottom of the independent cavity, jointly achieving a good liquid sealing effect with the oil-phase liquid sealing layer.

An inkjet recording method includes: ejecting aqueous ink from a liquid ejection head; and ejecting an aqueous reaction liquid containing a reactant that reacts with the aqueous ink from the liquid ejecting head, in which the liquid ejecting head configured to eject the aqueous reaction liquid includes: an element substrate; a nozzle having a nozzle configured to eject an aqueous reaction liquid, a pressure chamber configured to supply the aqueous reaction liquid to the nozzle, and an energy generating element configured to generate energy to eject the aqueous reaction liquid; an upstream channel configured to supply an aqueous reaction liquid to the pressure chamber; and a downstream passage communicating with the pressure chamber, the element substrate having a surface configured to face the recording medium, and the spout being positioned closer to the pressure chamber than the surface in a direction perpendicular to the surface.

The present invention relates to a method for determining the hydrogen content of a reversible hydrogen storage system based on formate salts and carbonate salts in an aqueous reaction system and to a device for detecting the hydrogen content.

The invention relates to a method for carrying out redox reactions with a three-phase electrode, having two separate phases, comprising an organic phase containing an amphiphilic organic reactant and / or an electrochemically inert organic solvent and an aqueous phase containing a hydrophilic reactant and / or an aqueous solvent with a hydrophilic reactant, wherein the organic and the aqueous phase are separated from one another by a permeable membrane.

This invention relates to an inkjet recording method, an inkjet recording apparatus, and a kit of aqueous ink and aqueous reactive solution. An inkjet recording method is provided that records images on a recording medium using an aqueous ink and an aqueous reactive solution containing a reactant that reacts with the aqueous ink. The aqueous ink comprises pigments dispersed by carboxylic acid groups, resin particles, and a water-soluble organic solvent. The pigments dispersed by carboxylic acid groups exhibit a particle size increase of more than 8.0 times upon contact with the aqueous reactive solution. In the Bristow method, from the start of contact to 30 msec... 1 / 2 The amount of water absorbed by the recording medium is 10 mL / m 2 the following.

Disclosed is method for on-site glyoxylation of polyacrylamide in a paper or board mill, where a discontinuous batch glyoxylation reaction of aqueous reaction mixture is performed in reactor vessel having driven agitator to form aqueous polymer composition comprising glyoxylated polyacrylamide. The method comprises forming or obtaining the aqueous reaction mixture comprising polyacrylamide base polymer and glyoxal, determining alkali consumption of the mixture, and adding to the mixture, based on determined alkali consumption, pre-determined amount of alkali for adjusting pH to 8-10. The temperature is optionally adjusted to 15-40° C. and the on-site glyoxylation reaction of polyacrylamide base polymer is allowed to proceed. Viscosity of the mixture and / or a variable related to the viscosity is measured, acid is added to the mixture for lowering pH to <8, when a predetermined end viscosity value is attained, and the aqueous polymer composition comprising glyoxylated polyacrylamide is removed from the reaction vessel.