81 results about "Benzenediol" patented technology

The invention discloses an alkali-free accelerator and a preparation method and application thereof in the technical field of concrete additives, and the alkali-free accelerator provided by the invention comprises the following components in percentage by mass: 40%-50% of aluminum sulfate, 10%-15% of magnesium sulfate, 0.2%-0.6% of diethanol amine, 0.5%-1% of catechol-4-ammonium sulfonate, 5%-10% of a stabilizer and the balance of water. The stabilizer comprises silicate dispersion liquid and silica sol. The alkali-free accelerator provided by the invention can be used for spraying concrete, the mixing amount of the alkali-free accelerator is generally 4-6% of the mass of cement, the alkali-free accelerator is good in rapid setting effect and has excellent early and later compressive strength, and meanwhile, the alkali-free accelerator has relatively excellent stability.

The invention provides benzocyclobutene-containing aromatic diamine and a preparation method thereof, and the preparation method comprises the following steps: dissolving 3-[1, 4-benzenediol]-bicyclo [4.2. 0]-octyl-1, 3, 5-triene and 4-nitrochlorobenzene in a first organic solvent, and reacting under an alkaline condition to obtain a benzocyclobutene-containing dinitro compound; and dissolving the benzocyclobutene-containing dinitro compound in a second organic solvent, and reducing in a hydrogen atmosphere to obtain the benzocyclobutene-containing aromatic diamine compound. The invention also provides a benzocyclobutene-containing aromatic polyamide polymer and a preparation method thereof. According to the linear aromatic polyamide and the cross-linked aromatic polyamide prepared by the invention, the content of benzocyclobutene in the structure can be adjusted according to a use scene, so that the mechanical strength, the thermal stability and the CTE are changed to adapt to different application requirements, and the linear aromatic polyamide is relatively good in solubility in an organic solvent, so that the linear aromatic polyamide is easy to process and relatively good in film-forming property.

The invention belongs to the field of photocatalytic preparation of hydrogen peroxide, and relates to a novel secondary amine linked covalent organic framework material (AR-COF) as well as a preparation method and application thereof. According to the material, tetraaldehyde phenyl porphyrin and 2, 5-diamino-1, 4-benzenediol dihydrochloride are subjected to a Schiff base reaction to synthesize an imine bond connected porphyrinyl covalent organic framework (IM-COF), and then synthesis post-modification (PSM) is performed on the imine bond connected porphyrinyl covalent organic framework (IM-COF) so that the imine bond connected porphyrinyl covalent organic framework (IM-COF) and sodium borohydride can be subjected to a reduction reaction to generate AR-COF. The photocatalytic stability of the material is maintained through modification after synthesis, the catalytic activity is improved, and the original crystal structure is not damaged. A photocatalytic hydrogen peroxide production experiment shows that the catalytic activity of AR-COF under 420 nm monochromatic light is superior to that of IM-COF, the yield under an oxygen condition reaches 7.79 mmol.g <-1 >. H <-1 >, and hydrogen peroxide can be stably produced. The method utilizes solar energy for green synthesis under mild conditions, and provides a safe and efficient method for hydrogen peroxide production.

The invention belongs to the technical field of production, separation and purification of hydroxyl carbazole, and provides a continuous flow production process of hydroxyl carbazole, which specifically comprises the following steps: (1) mixing raw materials of o-halogenated aniline, benzenediol, an organic solvent and an acid catalyst, and pumping into a first reactor for reaction; (2) sequentially performing extraction, reduced pressure distillation, recrystallization and drying treatment on the reaction liquid at the outlet of the first-stage reactor to obtain a reaction product photoreaction intermediate; (3) continuously pumping a mixed solution of the photoreaction intermediate prepared in the step (2), a photoreaction catalyst and a second solvent into a second-stage photoreactor, and carrying out photochemical reaction under the irradiation of a UV-LED light source; and (4) sequentially carrying out neutralization, reduced pressure distillation and recrystallization on the reaction liquid at the outlet of the second-stage photoreactor to obtain a hydroxyl carbazole product. By adopting the technical scheme provided by the invention, various hydroxycarbazole with high yield and high purity can be prepared, and the production period is shortened.

The embodiment of the invention provides a method for separating a benzenediol isomer and 5-indanol in a phenol-containing crude product, which comprises the following steps: rectifying the phenol-containing crude product to obtain mixed benzenediol with a distillation range of 240-300 DEG C; the method comprises the following steps: carrying out etherification reaction on mixed benzenediol with the distillation range of 240-300 DEG C obtained by rectifying crude phenol rectification residues by adopting etherification reaction: carrying out etherification reaction on the mixed benzenediol and an etherification reagent under the action of a catalyst, recovering excessive etherification reagent in a reactant after the reaction, and rectifying to obtain etherate; wherein hydroquinone dialkyl ether with the purity not lower than 98% is crystallized and purified by adopting a melt crystallization method or a solvent crystallization method; and / or reducing a part of etherate by using mixed trimethylbenzene and hydrobromic acid to obtain various benzenediol isomers and 5-indanol.

The invention belongs to the field of photocatalytic preparation of hydrogen peroxide, and relates to a porphyrin-based covalent organic framework material (IM) as well as a preparation method and application thereof. The material is synthesized through a Schiff base reaction of tetraaldehyde phenyl porphyrin and 2, 5-diamino-1, 4-benzenediol dihydrochloride, an imine bond connected covalent organic framework is formed, interlayer hydroxyl strengthens the structural orderliness and stability through hydrogen-bond interaction, a porphyrin large-pi conjugated system drives efficient transmission of electrons in the framework, and the separation efficiency of photon-generated carriers is improved. The obtained IM photocatalyst is good in crystallinity, a photocatalytic hydrogen peroxide production experiment shows that the hydrogen peroxide yield reaches 1470.24 [mu] mol.g <-1 > after IM reacts for 4 h under irradiation of an ultraviolet lamp, the yield is stably increased, and high catalytic activity and stability are shown. The method utilizes light energy for green synthesis of hydrogen peroxide under mild conditions, and provides an efficient and safe new strategy for hydrogen peroxide production.

The invention discloses a connecting peptide and application thereof in promoting compound glucose methylation modification. A glycosyl transferase-methyltransferase fusion protein gene and genes LtLasS1 and LtLasS2 coded by benzenediol lactone synthetase, which are connected in series by connecting peptides, are co-expressed, and liquid phase and mass spectrometry of a fermentation product are carried out to determine that the fusion protein can realize glucose methylation modification by hydroquinone lactone. Wherein the conversion efficiency of the fusion protein hydroquinone lactone using the DL-4 connecting peptide is the highest, and the relative conversion rate is 65.54 + / -3.75%. Besides, by feeding a substrate kaempferol and testing the glucose methylation conversion efficiency of the artificial fusion protein constructed by the connecting peptide, the conversion efficiency of the fusion protein using the DL-4 connecting peptide to the substrate is 6 times of the conversion efficiency of the fusion protein using a single glycosyl transferase and a single methyltransferase to the substrate, and the relative conversion rate is increased to 60.12 + / -4.79%.

The invention provides a synthesis method and a modification method of a TS-1 catalyst and a method for preparing benzenediol. The TS-1 catalyst is obtained by taking tetraethyl orthosilicate as a silicon source, tetrabutyl titanate as a titanium source and quaternary ammonium salt of chitosan and tetrapropylammonium hydroxide as structure-directing agents, and the TS-1 catalyst is uniform in particle size and smooth in surface and has a short b-axis lamellar and mesoporous structure. According to the method, the TS-1 catalyst is modified by the silane coupling agent to obtain the modified TS-1 catalyst, and under the action of the modified TS-1 catalyst, phenol hydroxylation is performed to synthesize benzenediol by taking hydrogen peroxide as an oxidizing agent, so that the phenol conversion rate of hydroxylation reaction and the para-position content in the product are improved, the reaction economic value is increased, and the operation process is simple.

The present application relates to the technical field of high polymer, in particular to a kind of anti-aging high-performance composite material and its injection molding process.The acidized spirocyclic phosphate is prepared by adding phosphorus oxychloride, pentaerythritol and formic acid.A kind of composite flame retardant is prepared by mixing reaction of acidized spirocyclic phosphate, phosphorus heteroheptacyclo-acrylamide double bond derivative, phosphorus heteroheptacyclo-allyloxy double bond derivative and phosphorus hetero-link-benzenediol diallyl double bond derivative.Then, high-performance composite material is obtained by adding polypropylene, acrylonitrile-butadiene-styrene copolymer, compatibilizer, inorganic filler, antioxidant, anti-aging agent, composite flame retardant and lubricant, and by melt extrusion and granulation.The high-performance composite material is injection molded to obtain finished product.The finished product prepared by the present application has good flame retardancy, anti-aging property and mechanical property, so it has wide application prospect in the technical field of high polymer.

Cannabidiol (CBD) is a cannabinoid designated chemically as 2-[(1R,6R)-3-Methyl-6-(1-methylethenyl)-2-cyclohexen-1-yl]-5-pentyl-1,3-benzenediol. Its empirical formula is C21H30O2 and its molecular weight is 314.46. CBD is a cannabinoid that naturally occurs in the Cannabis sativa L. plant. CBD is a white to pale yellow crystalline solid which is insoluble in water and soluble in organic solvents. The present invention encompasses the surprising recognition that certain CBD preparations which are prepared from a botanical origin are more effective in treating diseases or disorders than preparations of CBD which are synthetic or purified to the extent no other impurities in the form of other cannabinoids are present. Prior CBD compositions have been prepared such that no psychoactive components, e.g., tetrahydrocannabinol (THC), remain in the final CBD preparation. Surprisingly, the absence of such minor impurities reduces the efficacy of CBD treatment. Such CBD preparations are characterized by chemical components and / or functional properties that distinguish them from prior CBD compositions. One or more components of the preparations described herein provide an unexpectedly synergistic effect when utilized in combination.

The invention relates to the field of rubber additive manufacturing, and prepares an asphalt-like substance composite additive applied to tire tread rubber. The asphalt substance contains but is not limited to benzenediol tar, furan phenol tar and benzenediol tar-formaldehyde oligomer. The composite additive prepared by the method is a reactive additive, partially participates in the cross-linking reaction of natural rubber or synthetic rubber, has the characteristics of a rubber plasticizer, and has the advantage of environmental friendliness due to no polycyclic aromatic hydrocarbon. The tread rubber prepared by using the composite additive has the advantages of low energy consumption in the rubber material mixing process, good extrudate size stability, good surface quality of the extruded and calendered rubber material, and good physical and mechanical properties, high tear resistance, high cutting resistance, low cost and the like on the premise of ensuring the processability compared with the common tread rubber composition. Tire durability can be improved and tire life can be prolonged.

The invention discloses a preparation method of 2, 4, 6-tris (2-hydroxy-4-n-hexyloxy aryl)-1, 3, 5-triazine, and belongs to the technical field of organic synthesis.The preparation method comprises the steps that benzenediol compounds and chloro-n-hexane are used as raw materials and subjected to an etherification reaction under the action of hexahydropyridine, after-treatment is conducted, an intermediate is obtained, the intermediate is subjected to post-treatment, and the 2, 4, 6-tris (2-hydroxy-4-n-hexyloxy aryl)-1, 3, 5-triazine is obtained. Reacting the intermediate with cyanuric chloride under the action of an AlOsupported ZnO catalyst to generate 2, 4, 6-tri (2-hydroxy-4-n-hexyloxy aryl)-1, 3, 5-triazine; the raw materials in the synthesis route are cheap, easy to obtain and wide in source, and the process route can effectively reduce the generation of industrial wastewater and waste acid, so that the production cost is reduced, the yield is high, byproducts are few, and industrial production is facilitated.

A method of forming an implantable biomaterial comprising the steps of providing a polyether-diisocyanate prepolymer, reacting the prepolymer with one or more chain extender molecules typically including benzene 1,4-diol to form a mouldable polymer selected from a polyurethane or polyurethane-urea polymer or a polyurethane-urea block copolymer; placing the mouldable polymer into an implantable biomaterial shaped mould, and shaping and curing the mouldable polymer in the implantable biomaterial shaped mould to form the implantable biomaterial. An implantable biomaterial such as a heart valve leaflet is also disclosed.

The present invention relates to the use of polymers obtained by free radical copolymerization of a mixture of: (1) acrylic acid; (2) methacrylic acid; and (3) at least one allylcatechol selected from 4-allylbenzene-1,2-diol, 3-allylbenzene-1,2-diol; methylated forms thereof (eugenol); and mixtures thereof, for treating metal surfaces intended for adhesive bonding to another surface in order to render the resulting bond resistant to adhesive failure.

The present invention relates to a process for the industrial-scale production of 5-{2-[benzyl-(1-(4-hydroxyphenyl)-1-methylethyl)amino]-1-hydroxyethyl}benzene-1,3-diol hemifumarate, a salt consisting of two molecules of 5-{2-[benzyl-(1-(4-hydroxyphenyl)-1-methylethyl)amino]-1-hydroxyethyl}benzene-1,3-diol and one molecule of fumaric acid, and having the following formula: 5-{2-[benzyl-(1-(4-hydroxyphenyl)-1-methylethyl)amino]-1-hydroxyethyl}benzene-1,3-diol hemifumarate is a useful intermediate in the synthesis of 5-[(1RS)-2-[(1RS)-2-(4-hydroxyphenyl)-1-methylethyl]-amino-1-hydroxyethyl]benzene-1,3-diol hydrobromide, which is used in the pharmaceutical field under the is known by the common name fenoterol hydrobromide.

The invention belongs to the technical field of oil exploitation, and particularly relates to a foaming agent for oil exploitation and a preparation method thereof. The preparation method comprises the following steps: (1) adding 5-heptylbenzene-1, 3-diol and a catalyst into a high-pressure reaction kettle, purging a pipeline and the reaction kettle with nitrogen, vacuumizing, stirring, heating to 80-85 DEG C, stopping vacuumizing, adding epoxypropane at one time, carrying out heating and heat preservation reaction for the first time, introducing ethylene oxide, carrying out heating and heat preservation reaction for the second time, and cooling to room temperature; and (2) adjusting the pH value to 5-6 by using phosphoric acid, cooling to below 10 DEG C, dropwise adding chlorosulfonic acid, and controlling the temperature to react to obtain the foaming agent. Based on 1 mole part of 5-heptylbenzene-1, 3-diol, the dosage of the propylene oxide is 4-20 mole parts, the dosage of the ethylene oxide is 10-80 mole parts, and the dosage of the chlorosulfonic acid is 1.8-2.8 mole parts. The foaming agent has the advantages of large foaming volume, long drainage half-life period, salt resistance, hardness resistance and temperature resistance.

The invention discloses a chemical mechanical polishing solution which comprises an epinephrine compound, the molecular structure of the epinephrine compound is # imgabs0 #, R1 is x, y-benzenediol or x, y, z-benzenediol, and x, y and z are numbers from 2 to 6; r2 and R3 are hydrogen atoms, alkane with the carbon number of 1-6 or alcohol with the carbon number of 1-6; and n is a number from 1 to 3. The invention provides a chemical mechanical polishing solution as well as a preparation method and application thereof, the polishing rate of silicon nitride can be inhibited while the polishing rate of the polishing solution to a silicon dioxide dielectric layer is increased, and the generation of dish-shaped grooves and scratches in the polishing process can be avoided or reduced.

A filter and a method for removing aldehyde-type VOCs from indoor air are disclosed. The filter includes a casing acting as a container. The container comprises two air-permeable opposite walls through which a volume of said indoor air flows and houses one or more natural polyphenols and a catalytic agent. The filter acts as an absorption filter, reacting irreversibly with the aldehyde-type VOCs of the indoor air. The natural polyphenols are powdered polyphenols selected from resveratrol (3,4′,5-trihydroxystilbene), resorcinol (1,3-benzenediol), pyrogallol (1,2,3-benzenetriol), phloroglucinol (1,3,5-benzenetriol) and hydroquinone (1,4-benzenediol), or combinations thereof. The catalytic agent is a solid sulfonic acid. A mixture of the natural polyphenols and said catalytic agent are present, in the container, as compacted block elements. An air-purifying / decontaminating device comprising the filter is also disclosed.

The invention relates to the technical field of gas chromatography inspection, and provides a benzenediol gas chromatography inspection device which comprises a bottom plate, an inspector is fixedly mounted at the top of the bottom plate, a display screen is fixedly arranged at the top of the inspector, a top frame is arranged at the top of the inspector, first sliding grooves are formed in the two sides of the inner wall of the top frame, and a second sliding groove is formed in the inner wall of the top frame. The device comprises two first sliding grooves, the interiors of the two first sliding grooves are slidably connected with a U-shaped frame, two limiting rods are fixedly installed on the inner wall of the U-shaped frame, the outer surfaces of the two limiting rods are slidably connected with a material storage tank through sliding blocks, and a first protruding block is fixedly installed at the top of the material storage tank. When bis (trimethylsilyl) trifluoroacetamide in the batching tank reacts with hydroxyl of benzenediol to generate a trimethylsilane derivative, the polarity is reduced, and the volatility is improved, when acetylation derivatives in the batching tank react with benzenediol to generate acetylation derivatives, and when a pyridine solvent in the batching tank reacts with benzenediol, the mixing uniformity is improved, and the reaction is promoted.

The present invention provides hydrophobically modified biopolymers comprising a hydrophobically modified chitosan comprising benzenediol groups, optionally a portion of which is oxidized to the corresponding quinones. The biopolymers exhibit a surprising ability to modulate mucosal adhesion, material cohesiveness, and material hemostatic effects to provide next generation hemostatic agents and the like. Accordingly, in other aspects, the invention provides compositions comprising the modified biopolymers of the invention and methods for the treatment of bleeding and wounds.

An objective of the present invention is to provide a conductive composition useful for manufacturing a conductive laminate that undergoes a small change in conductivity over time. The conductive composition contains a carbon nanotube (A), a dispersant (B), and a phenol (C), wherein the phenol (C) has a carboxyl group or an alkoxycarbonyl group that may have a hetero atom, and the molecular weight thereof is 100-1000.

The preparation method comprises the following steps: by taking benzenediol, trimellitic anhydride, a catalyst, an acid-binding agent and a chlorination reagent as raw materials, preparing p-phenylene-dimellitic acid ester monotetracid by using a one-pot method, and then reacting the p-phenylene-dimellitic acid ester monotetracid with acetic anhydride to obtain p-phenylene-dimellitic acid ester dianhydride. The preparation method has the advantages that the preparation process is simplified, the manufacturing cost is reduced, and the preparation method is more suitable for industrial production.

The present disclosure provides hydrophobically-modified biopolymers, including hydrophobically-modified chitosans, which comprise benzenediol groups, optionally where a portion are oxidized to the corresponding quinone. The biopolymers demonstrate a surprising ability to tune mucoadhesive properties, material cohesive properties, and hemostatic action of the material, to provide next generation hemostats, among other uses. Accordingly, in other aspects, the disclosure provides compositions comprising the modified biopolymers of the disclosure as well as methods for bleed and wound treatment.

The invention discloses a multiple nested framework material MNF-2 constructed based on a dynamic B <-N bond and a preparation method of the multiple nested framework material MNF-2. The material MNF-2 is prepared from monomer molecules, 1, 4-phenylenediboronic acid and 4-chlorocatechol as raw materials; wherein 1, 4-benzene diboronic acid and 4-chlorocatechol are dehydrated to generate a boric acid ester structure, and B atoms of boric acid ester are combined with N atoms in monomer molecules to form B <-N coordinate bonds. A monomer molecule 4, 4, 8, 8, 12, 12-hexamethyl-2, 6, 10-tri (4-pyridyl)-8, 12-dihydro-4H-benzo [9, 1] quinolizino [3, 4, 5, 6, 7-defg] anthracene (monomer molecule M1 for short) is synthesized firstly, the monomer molecule M1 and a lewis acid molecule (4-chlorocatechol) are subjected to a one-pot method through a B <-N bond in a solution to effectively generate an MNF material, and a two-dimensional lamellar structure is formed. The lamellar material has excellent mechanical properties. The acting force range of the two-dimensional MNF material is further widened, and a new strategy is provided for preparation of the two-dimensional MNF material.

The instant invention concerns the use of polymers obtained by radical copolymerization of a mixture of (1) acrylic acid; (2) methacrylic acid; and (3) at least one allylcatechol selected from 4-allylbenzene-1,2-diol, 3-allylbenzene-1,2-diol; methylated forms thereof (eugenols); and mixtures thereof, for treating a metallic surface intended to be adhesive-bonded to another surface, in order to impart a resistance to the adhesive failure to the resulting bonding.

The application discloses a connecting peptide and application thereof in promoting glucose methylation modification of a compound. Glycosyltransferase-methyltransferase fusion protein genes connected by connecting peptides, genes LtLasS1 and LtLasS2 encoding benzenediol lactone synthetase are co-expressed, and it is determined through liquid phase and mass spectrum analysis of fermentation products that the fusion protein can realize glucose methylation modification on benzenediol lactone. The conversion efficiency of the fusion protein using DL-4 connecting peptide on benzenediol lactone is the highest, and the relative conversion rate is 65.54+ / -3.75%. In addition, the glucose methylation conversion efficiency of the artificial fusion protein constructed by feeding the substrate kaempferol is tested, and the conversion efficiency of the fusion protein using DL-4 connecting peptide on the substrate is 6 times that of the conversion efficiency of the substrate by using a single glycosyltransferase and methyltransferase respectively, and the relative conversion rate is increased to 60.12+ / -4.79%.

The application relates to the technical field of benzenediols, and discloses a method for preparing benzenediols, which comprises the following steps: carrying out an oxidation reaction of benzene and an oxidant in the presence of a titanium silicalite and an optional organic solvent; wherein the titanium silicalite comprises a doped metal element which enters the skeleton structure of the titanium silicalite, the bond length between the doped metal element and O atoms in the skeleton of the titanium silicalite is 0.02-0.55 nm, and the doped metal element comprises a group VIII and / or group IB metal element. By adopting the titanium silicalite containing the doped element as a catalyst, the conversion rate of benzene in the process of preparing phenol by benzene hydroxylation, the total yield of benzenediols and the selectivity of hydroquinone can be effectively improved.

In aspects, the present application provides hemostatic powder compositions, and methods of making and using such powder compositions. For example, the present application provides hemostatic powder compositions, comprising a modified chitosan comprising covalently attached hydrophobic grafts and / or benzenediol groups, and optionally oxidized forms of the benzenediol groups, along the chitosan backbone.

The invention discloses an anti-aging and anti-sticking master batch for blow molding PE and a preparation method thereof, the anti-aging and anti-sticking master batch comprises the following components by weight: 40%-60% of carrier resin, 15%-33% of a filler, 1%-2.2% of a plasticizer, 3%-6.25% of an anti-aging agent, 1.8%-5.85% of an anti-sticking agent, 1.4%-1.8% of a coloring agent, 2%-3.6% of a light stabilizer, and 5%-9% of an antistatic agent, the filler is at least one of phenolic resin, glass fiber, hydroquinone and carbon powder, the plasticizer is at least one of diheptyl phthalate and dioctyl phthalate, the anti-aging agent is at least one of benzenediol, coke black and titanium dioxide, the anti-sticking agent is at least one of talcum powder and nano silicon wax, and the filler is at least one of dioctyl phthalate and dioctyl phthalate. The light stabilizer is at least one of zinc oxide and ascorbate. The invention relates to the technical field of master batches. According to the anti-aging master batch disclosed by the invention, through overall mutual cooperation, the application strength of the master batch can be ensured, the overall anti-aging performance also can be considered, and the service life of a finished product of a master batch product is greatly ensured.

The invention belongs to the technical field of cables, and particularly relates to a polyvinyl chloride fire-resistant power cable and a preparation method thereof. And extruding and granulating the premix to obtain the polyvinyl chloride fire-resistant power cable material. The preparation method of the hybrid modified bisphenol A epoxy resin comprises the following steps: carrying out phosphate esterification reaction on phosphorus trichloride, 3-(vinyloxy) benzene-1, 2-diol and an acid-binding agent to obtain a flame retardant; performing Claisen rearrangement on the flame retardant to obtain a flame retardant precursor, and finally performing addition reaction on the flame retardant precursor and 1, 3-bis (aminopropyl) tetramethyldisiloxane to obtain the heat-stable flame retardant. The preparation method comprises the following steps: pre-curing hybrid bisphenol A epoxy resin with a heat-stable flame retardant, an antioxidant, phthalic anhydride and tetrabutyl titanate under a vacuum condition to obtain hybrid modified bisphenol A epoxy resin; the cable material disclosed by the invention can effectively improve the flame retardance, heat resistance, toughness and interface bonding capacity of the polyvinyl chloride cable.