25 results about "Aqueous reaction" patented technology

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 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.

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.

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.

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.

The invention relates to a method for producing a polymer dispersion, to a polymer dispersion and to the use thereof. The method for preparing a water-in-water polymer dispersion utilizes a batch reactor that provides a specific shear distribution wherein the method comprises the step of free radical polymerization of an aqueous reaction mixture to synthesize a dispersed polymer and form a water-in-water polymer dispersion, the aqueous reaction mixture comprises (a) a polymeric dispersant and (b) a monomer composition comprising a radically polymerizable monomer, wherein the radically polymerizable monomer is selected from one or more of a nonionic ethylenically unsaturated monomer, a cationic ethylenically unsaturated monomer, and an amphiphilic ethylenically unsaturated monomer.

Provided is a reaction liquid for ink jet, which can record a high-quality image and is excellent in intermittent ejection stability, to be used together with an aqueous ink. The reaction liquid for ink jet is used in an ink jet recording method including 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 reaction liquid includes a polyvalent metal salt and a surfactant. The surfactant is a compound including a hydrophilic moiety having an anionic group and a hydrophobic moiety that is an aliphatic hydrocarbon group. A mass ratio of a content (% by mass) of the polyvalent metal salt in the reaction liquid to a content (% by mass) of the surfactant therein is 10.0 times or more to 35.0 times or less.

The present invention relates to a process for the preparation of silicates, preferably alkali silicates, from spent foundry sand using a hydrothermal route, comprising the step of reacting said spent foundry sand with a base, preferably an alkali hydroxide, in an aqueous reaction medium, wherein the process does not comprise any thermal pre-treatment step as applied in prior art processes. The present invention also relates to a process for the preparation of precipitated silica using said silicates.

The present invention relates to a method for producing a support at least micrometric in size, photocatalytically active and at least in the visible range, containing nanocrystals each composed of from 80 to 100 mol % of TiO2 and from 0 to 20 mol % of at least one other metal or semi-metallic oxide, comprising the following steps, from an acidic aqueous reaction medium, at a heating temperature of between 20 and 60° C.: a step of adding the titanium oxide precursor, or a mixture of the titanium oxide precursor and the precursor of the other oxide, in the acidic aqueous reaction medium, and a condensation step on or inside the support, by spraying onto the support or immersing the support in the aqueous reaction medium, for a specific period of condensation, a heating step, the support allowing the nanocrystals to be crystallized, without using surfactant, in the aqueous reaction medium, a step of rinsing with water and a recovery step on the one hand of the support on which the crystallization took place, these nanocrystals being attached by covalent bonds to the support, and on the other hand of a residual solution.

The invention relates to a process for in-situ glyoxylation of polyacrylamide in paper mills, board mills and the like, wherein a discontinuous batch glyoxylation reaction of an aqueous reaction mixture is performed in a reactor vessel equipped with a drive stirrer to form an aqueous polymer composition comprising glyoxylated polyacrylamide. The process comprises forming or obtaining an aqueous reaction mixture having a starting viscosity and comprising a polyacrylamide base polymer having a weight average molecular weight of 30000 - 300000 g / mol and glyoxal. The concentration of the polyacrylamide base polymer in the reaction mixture is 1.5% - 8% higher than the critical concentration of the polyacrylamide base polymer. A base feed is added to the reaction mixture while measuring the viscosity of the reaction mixture and / or a process variable related to the viscosity of the reaction mixture and allowing the in-situ glyoxylation reaction of the polyacrylamide base polymer in the reaction mixture to proceed. When a predetermined final viscosity value is reached, the base feed is terminated and an acid is added to the reaction mixture. The aqueous polymer composition comprising glyoxylated polyacrylamide is removed from the reaction vessel.

The present invention relates to a batch reactor comprising an aqueous reaction mixture for the preparation of a water-in-water polymer dispersion by free radical polymerization wherein the batch reactor comprises a stirrer treated by a grinding and polishing technique or wherein the batch reactor is free of baffles. Furthermore, the invention relates to a method for producing a water-in-water polymer dispersion by free-radical polymerization in said batch reactor. Furthermore, the invention relates to the use of said batch reactor in a method for producing a water-in-water polymer dispersion.

The invention discloses a non-aqueous reaction type bi-component polyurethane grouting material as well as a preparation method and application thereof. The non-aqueous reaction type bi-component polyurethane grouting material comprises a component (a) and a component (b), the component (a) comprises the following raw materials: first polyether polyol, second polyether polyol, a first plasticizer, a composite catalyst and nano silicon dioxide; the component (b) is prepared from the following raw materials: polymethylene polyphenyl polyisocyanate, polyether polyol modified isocyanate, a second plasticizer, aromatic hydrocarbon oil and nano calcium carbonate; wherein the difference value of the hydroxyl value and the difference value of the molecular weight of the second polyether polyol and the first polyether polyol are controlled, and the composite catalyst is composed of triethylene diamine, dibutyltin dilaurate and zinc octoate; practice shows that the mechanical strength is remarkably improved while good constructability and flexibility of a polyurethane material are maintained, breakthrough balance of comprehensive performance is achieved, and an ideal novel grouting material solution is provided for the field of structural reinforcement.

The present application relates to a kind of cyclic solid-phase reaction column systems based on induction heating and its operating method.The system includes reaction column, liquid inlet pipeline, liquid outlet pipeline, circulation pipeline and diaphragm pump or plunger pump or plunger pump and valve arranged in each pipeline, reaction column is filled with solid beads or particles inside, copper induction coil is arranged on its outside, and is electrically connected with induction heating module.Circulation diaphragm pump or plunger pump or plunger pump is started under the condition that liquid inlet valve and liquid outlet valve are closed, to make aqueous solution form closed circulation in reaction column, utilize induction heating module to heat reaction column, realize the uniform circulation and heating of solution in reaction column.It can complete cleaning, reaction and product collection operation in the same reaction column, diaphragm pump or plunger pump can form fluid block in stop working state, with the function of pump and valve.The present application is simple in structure, high in heating efficiency, flexible in operation, and suitable for various solid-phase and aqueous reaction process.

The invention relates to a paper-based sensor, a preparation method of the paper-based sensor and application of the paper-based sensor in detection of alternariol, and belongs to the technical field of food detection. The paper-based sensor comprises a first protective layer, an immobilization layer, a substrate layer, a color development layer and a second protective layer, the surfaces of the first protective layer and the second protective layer are coated with hydrophobic materials; central areas of the immobilization layer, the substrate layer and the color development layer are coated with acetylcholin esterase, acetylthiocholine and nano-enzyme respectively to form hydrophilic reaction areas, and non-hydrophilic reaction areas are coated with hydrophobic materials to form hydrophobic isolation areas; the first protection layer, the immobilization layer, the substrate layer, the color development layer and the second protection layer are folded according to a preset sequence, and the hydrophilic reaction areas of the immobilization layer, the substrate layer and the color development layer are mutually overlapped after folding. The paper-based sensor is remarkably improved in the aspects of detection sensitivity, stability and convenience.

The disclosure relates to adhesive compositions, including non-crosslinked resins and crosslinked / cured adhesives joining substrates, as well as related methods for making the compositions and articles. Compared to a conventional phenol (P) and formaldehyde (F) resin, the disclosed methods and compositions use lignin (L) and higher aldehydes (A) as corresponding replacements to provide an analog to a conventional PF resin with biobased reactants. Due to the differing reactivity of the LA components compared to the PF components, the initial condensation reaction between ortho-reactive sites in the lignin and the aldehyde is controlled to prevent gelation of the aqueous reaction mixture while reacting substantially all of the LA reactants to provide a non-crosslinked resin reaction product. The resin reaction product can then be cured at high temperature / high pressure conditions to provide a crosslinked adhesive, for example joining two substrates.

The invention relates to a method for detaching and recovering gold particles (12), in particular in the form of flakes, from an object (6) to be treated comprising an external or outer layer made of gold deposited on a substrate, the method comprising the following steps: a) treating the object (6) to be treated with an aqueous reactive solution (8) allowing solid gold particles (12) to be separated from the substrate; and b) separating the solid gold particles (12) by air bubble flotation in said aqueous reactive solution (8).

The present invention relates to a method for Extracellular Polymeric Substances (EPS) extraction from an aqueous stream, including phosphorylation of the EPS, phosphorylated EPS obtainable by the method according to the invention, and use of the phosphorylated EPS. The method comprises the steps of: - providing an aqueous stream comprising EPS and a phosphorus source to an alkaline reactor forming an aqueous reactant; - heating the EPS and the phosphorus source in the alkaline reactor; - adjusting the pH of the aqueous stream and / or the aqueous reactant to a pH in the range of 8 to 13; - phosphorylating the EPS with the phosphorus source; - controlling the step of phosphorylating the EPS; - solubilising the phosphorylated EPS in an aqueous phase of the aqueous reactant; - separating the aqueous phase comprising solubilised phosphorylated EPS from other phases present in the aqueous reactant; - acidifying the aqueous phase comprising solubilised phosphorylated EPS to a pH in the range of 1 to 4; - precipitating the phosphorylated EPS from the aqueous phase; and - separating the phosphorylated EPS from the aqueous phase.

This invention discloses a photocatalytic water splitting method for hydrogen production using a carbon nitride-supported copper-based MOF catalyst, belonging to the field of photocatalytic hydrogen production technology. This invention solves the technical problems of low activity, unsuitable reaction conditions, and poor hydrogen production efficiency of existing photocatalytic hydrogen production methods using carbon nitride-based catalysts. The key points of the technical solution are: using C3N4-C-MOF2.0 prepared by a molar ratio of C3N4-C and Cu(NO3)2·3H2O of 1:2.0 as the photocatalyst, eosin Y as the photosensitizer, and triethanolamine as the electron donor, an aqueous reaction system with pH 8.0-9.0 is prepared according to the specified ratio. After degassing, the reaction is carried out at 6℃ under visible light above 420 nm for 3 h. The hydrogen production is detected by gas chromatography, and the catalyst can be recycled. This method has high hydrogen production efficiency, with a hydrogen evolution rate of 12.7 mmol·g. ‑1 ·h ‑1 The catalyst exhibits good stability, the process is simple and controllable, and it is environmentally friendly, making it suitable for large-scale green hydrogen production driven by visible light.

A method for producing agglomerated and activated TiO2 or TiO2 / MxOy comprising the steps of: preparing and heating a surfactant-free aqueous solution at neutral pH or at a given acidic pH, adding to the acidic or neutral aqueous solution a titanium oxide precursor, or a mixture of a titanium oxide precursor TiO2 and at least one other precursor of another oxide MxOy, composed of more than 80 mol % of TiO2 and less than 20 mol % of another metal or semi-metal oxide MxOy, and stirring the acidic or neutral aqueous reaction medium; immersing a plastic material or a crushed mixture of plastic materials in the acidic or neutral aqueous reaction medium; heating the acidic or neutral aqueous reaction medium at a temperature of between 30° C. and 90° C.; photocatalytically degrading, at neutral or acidic pH, the plastic material or the mixture of plastic materials to obtain agglomerated and activated TiO2 or TiO2 / MxOy.

The present invention relates to a method for depleting a homogeneous catalyst system from an aqueous reaction phase and concentrating it into an organic phase, wherein the catalyst system is employed in the oxidation of an ethylenically unsaturated organic compound in a biphasic reaction mixture. Moreover, the present invention relates to a method for the oxidation of an ethylenically unsaturated organic compound, and biphasic mixtures as well as aqueous and organic phases obtained in such methods.

Provided is an ink jet recording method including using an aqueous ink and a reaction liquid, in which ejection stability of the reaction liquid is excellent and a high-quality image can be recorded. Specifically, provided is an ink jet recording method including recording an image on a recording medium with an aqueous ink and an aqueous reaction liquid. The ink jet recording method includes a reaction liquid applying step and an ink applying step. An ejection head includes: an ejection element substrate including an ejection orifice configured to eject the reaction liquid; and a circulation flow path configured to circulate the reaction liquid between an inside and an outside of the ejection element substrate.

This provides an ink set that allows for the recording of images with good scratch resistance immediately after recording, while also offering good storage stability. [Solution] This ink set includes an aqueous ink, an aqueous reaction solution containing a reactant that reacts with the aqueous ink, and a liquid composition different from the reaction solution. This ink set is used in an inkjet recording method in which the aqueous ink, reaction solution, and liquid composition are ejected from an inkjet ejection head and applied to a recording medium to record an image. The liquid composition contains a crosslinking agent that can form covalent bonds with components in the aqueous ink. The aqueous ink contains resin particles that can form covalent bonds with the crosslinking agent.