29 results about "Pyrogallol" patented technology

The invention relates to a continuous production method of ultra-pure 2, 3, 4, 4 '-tetrahydroxybenzophenone, which comprises the following steps: completely dissolving p-hydroxybenzoic acid in high-boiling range petroleum ether, and completely dissolving pyrogallic acid in the high-boiling range petroleum ether; the preparation method comprises the following steps: adding a p-hydroxybenzoic acid solution and a pyrogallic acid solution into an ultra-pure continuous reactor group, adding boron trifluoride diethyl etherate into the ultra-pure continuous reactor group at a flowing speed, reacting at 110-140 DEG C, adding the obtained reaction solution into the next ultra-pure continuous reactor group, stirring in ice water, filtering, washing and recrystallizing to obtain the 2, 3, 4, 5-tetramethyl-3, 5-dihydroxybenzoic acid. According to the present invention, the reaction time is substantially shortened, the conversion rate is 70-80%, the purity of the obtained electronic product is more than or equal to 99.2%, the content of the metal ions such as sodium, aluminum, copper, iron, calcium, zinc and boron is less than or equal to 60 ppb, the reaction materials, the reaction temperature and the reaction rate are controllable, the reaction is sufficient, the yield of the obtained target product is stable, and the method can be used for continuous production.

The invention relates to the technical field of medical dressings, in particular to a polyurethane foam dressing and a preparation method thereof. Polyethylene glycol, polyhydroxy chitosan, polyhydroxy pyrogallol, antibacterial silicon dioxide, a foaming agent, 2, 6-toluene diisocyanate and other raw materials are added, and the polyurethane foam dressing is obtained through heat preservation and curing. The polyurethane foam dressing prepared by the invention has good antibacterial and anti-inflammatory effects, so that the polyurethane foam dressing has a wide application prospect in the technical field of medical dressings.

The application belongs to the field of fungicides, and discloses a 1,3,4-oxa / thia-diazole pyrogallol derivative, a preparation method and application, and the structure of the compound is as shown in the formula I: in the formula I, X is an oxygen atom or a sulfur atom; R is a hydrogen atom, a halogen atom or a methoxy group; the halogen is one of F, Cl and Br. The compound has the effect of inhibiting plant pathogenic fungi and preventing and treating plant fungal diseases, and can be applied to plant protection as a fungicide.

This invention discloses a PVDF-modified ultrafiltration membrane based on a tannic acid crosslinking network, its preparation method, and its applications. The membrane is prepared by a phase inversion membrane fabrication method using polyethyleneimine, tannic acid, polyvinylidene fluoride (PVDF), and N,N-dimethylacetamide (NDM). The pyrogallol structure abundant in the tannic acid molecule can coordinate with metal ions and also form a robust covalent crosslinking network with the amine-rich polyethyleneimine through Michael addition and Schiff base reactions. This network firmly anchors TA to the membrane surface and pores, solving the problem of TA loss in traditional modifications. The introduction of TA imparts lasting hydrophilicity to the membrane, significantly improving pure water flux and separation efficiency. Simultaneously, the hydrophilic and positively charged surface synergistically constructed by TA and PEI effectively inhibits the adsorption and deposition of pollutants, endowing the membrane with excellent antifouling performance and operational stability. This PVDF membrane, prepared through a green and simple co-crosslinking strategy, shows broad application prospects in complex water treatment and bioseparation.

The present invention relates to lignin comprising beta-O-4'units bound in position to one or more compounds of formula (I), such as phenol, catechol, resorcinol, hydroquinone, pyrogallol and / or guaiacol, a process for its preparation and its use. And lignin fragment 1.

The invention relates to a carbon-coated silicon-based negative electrode material and a preparation method thereof, a negative electrode plate and a lithium ion battery, and relates to the technical field of battery negative electrode materials, and the preparation method comprises the following steps: dispersing silicon powder in a modification liquid to obtain a hydroxyl modified silicon dispersion system, filtering the hydroxyl modified silicon dispersion system to obtain an intermediate product, dispersing the intermediate product and amino silane in a solvent for reaction, and drying to obtain the carbon-coated silicon-based negative electrode material. The reaction product is filtered, washed and dried, amino modified silicon powder is obtained, and modified liquid contains sulfuric acid and hydrogen peroxide; the preparation method comprises the following steps: dispersing amino modified silicon powder in an aqueous solution of pyrogallol and / or catechol, adjusting the pH value of the dispersed system to 8.0-9.5, adding an aqueous solution containing an amino polymer for reaction, carrying out solid-liquid separation on the reacted system, and calcining the obtained solid product to obtain the carbon-coated silicon-based negative electrode material. The capacity and the cycle life of a battery prepared by compounding the carbon-coated silicon-based negative electrode material and graphite reach an optimal balance state.

This desalination performance recovery agent for a polyamide film contains a solvent and any one of polyvinylpyrrolidone, pyrogallol, or polyvinyl alcohol mixed in a solvent. A desalination performance recovery agent in which polyvinylpyrrolidone is mixed in the solvent has a pH of 10 or less. A desalination performance recovery agent in which pyrogallol is mixed in the solvent has a pH of 6 or less. A desalination performance recovery agent in which polyvinyl alcohol is mixed in the solvent has a pH of 9 or less.

The application belongs to the technical field of natural fruit active substance detection, and discloses a method for simultaneously detecting the contents of multiple active components in green fruits based on HPLC, wherein the active components include seven main active components in green fruits, i.e., pyrogallol, gallic acid, epicatechin, ethyl gallate, p-coumaric acid, epigallocatechin and ellagic acid. The detection method established by the application is good and the instrument is precise, and the method has the technical advantages of good selectivity, high sensitivity and accuracy and reliability for detecting the contents of the main active components in green fruits, thereby providing a new analysis method and reliable basis for quality analysis and quality control of green fruits.

The invention provides a lithium ion battery liquid injection method and a lithium ion battery, the liquid injection method comprises the following steps: primary liquid injection, injection of a first electrolyte into a to-be-injected lithium ion battery, and preparation of a pre-lithiated lithium ion battery, the first electrolyte comprises a first phenolic compound, the molecular structure of the first phenolic compound comprises pyrogallol, and the molecular structure of the first phenolic compound comprises pyrogallol; the mass ratio of the first phenolic compound in the first electrolyte is 2%-3%; and secondary liquid injection is conducted, specifically, a second electrolyte is injected into the pre-lithiated battery, the second electrolyte comprises a second phenolic compound, the molecular structure of the second phenolic compound comprises pyrogallol groups, and the mass ratio of the second phenolic compound in the second electrolyte is 0.5%-1.5%. The liquid injection method can effectively reduce decomposition gas production of the electrolyte, reduce deposition of transition metal on a negative electrode interface, and improve the cycle performance of the lithium ion battery.

This invention relates to a polyisoprene-based phloroglucinol compound, its preparation method, and its applications, belonging to the field of pharmaceutical technology. The structural formula of the compound is shown below. The preparation method involves extracting the fruit of *Garcinia macrocarpa* in an aqueous organic solvent solution, followed by extraction with petroleum ether and dichloromethane, and then purifying the compound using silica gel column chromatography, ODS column chromatography, Sephadex LH-20 gel column chromatography, and semi-preparative high-performance liquid chromatography. The above method is simple and easy to implement, and the resulting compound has a novel structure with a [2,4,1]nonane core structure. It can promote the secretion of insulin in palmitic acid-induced pancreatic β-cells, showing promise for the preparation of drugs for the prevention and treatment of hyperglycemia.

This invention relates to the field of waterborne adhesives, specifically to a waterborne anti-corrosion and environmentally friendly adhesive and its preparation method. The adhesive comprises soft acrylic monomers, hard acrylic monomers, functional monomers, silane-imidazolium-pyrogallol acrylate monomers, emulsifiers, initiators, pH buffers, deionized water, etc. The silane-imidazolium-pyrogallol acrylate monomers are composed of trimethylolpropane, pentaerythritol glycidyl ether, gallic acid, imidazolium-4,5-dicarboxylic acid, 3-aminopropyltriethoxysilane, etc. Gallic acid provides the pyrogallol anti-corrosion group, imidazolium provides the stabilizing corrosion-inhibiting group, silane provides the synergistic effect of adhesion enhancement and corrosion prevention, and the acrylate double bonds achieve copolymerization. The adhesive prepared by this invention exhibits excellent adhesion, tensile shear strength, salt water resistance, salt spray resistance, and emulsion stability. It is also environmentally friendly and free of heavy metals, making it suitable for bonding and protecting metal substrates.

To provide an anti-aging composition capable of removing senescent cells without causing side effects.SOLUTION: The present invention relates to an anti-aging composition containing a fermented barley extract and an organic acid, an anti-aging composition containing a culture or a processed product thereof of lactic acid bacteria cultured in a medium containing a fermented barley extract, and an anti-aging composition containing pyrogallol or gallic acid, wherein theses anti-aging compositions enable a reduction in the number of senescent cells (senolysis) by a senescent-cell-eliminating action that induces apoptosis in senescent cells.SELECTED DRAWING: None

This invention provides a method for preparing pyrogallol A, relating to the field of photoresist materials technology. The method uses 2-phenyl-2-propanol as a starting material and obtains pyrogallol A in a one-pot process. Specifically, aluminum trichloride is added to dichloroethane and stirred to disperse, and acetyl chloride is added dropwise to obtain a complex solution. A dichloroethane solution of 2-phenyl-2-propanol is then added dropwise for reaction. Hydrochloric acid is added for quenching. Phenol, dodecyl mercaptan, and sodium dodecyl sulfate are then added, and the reaction is heated. After the reaction is complete, the mixture is kept at a constant temperature, filtered, washed, and dried to obtain pyrogallol A. The Friedel-Crafts reaction has a high conversion rate, and no post-processing or purification is required after quenching; condensation can be directly performed. Condensation is a heterogeneous reaction, and the reaction time is significantly shortened by adding a catalytic amount of phase transfer catalyst. The preparation method of this invention uses readily available raw materials, produces a product with high purity and high yield, has a short reaction time, is simple to operate, and is low in cost, while also reducing waste, making it suitable for industrial production.

The present disclosure relates to a catechol group- or pyrogallol group-functionalized biocompatible polymer hydrogel patch having excellent biocompatibility and tissue adhesion, and uses for drug delivery, cell transplantation and tissue regeneration using the same. The biocompatible polymer hydrogel patch functionalized with the catechol group or pyrogallol group of the present disclosure has remarkably excellent mechanical properties and tissue adhesion compared with a solution-based bulk hydrogel. Therefore, it can load cells and a drug in vivo for a long time and also safely and efficiently deliver the cells and the drug to a target site.

The invention relates to the technical field of natural medicines, and discloses a polycyclic polyisopentenyl phloroglucinol compound as well as a preparation method and application thereof. The polycyclic polyisopentenyl phloroglucinol compound is a compound as shown in a formula I which is described in the specification. The polycyclic polyisopentenyl phloroglucinol compound disclosed by the invention has remarkable activity of reversing tumor drug resistance, has great potential application value, and also provides a new thought and approach for development of novel preparation of drugs for preventing or treating tumors.

This invention discloses a method for preparing a nitrogen-containing heterocyclic D-A type COF photocatalyst and its application. The specific steps are as follows: Step S1, an aldehyde ligand and an amino ligand are added to a Pyrex reaction tube at a molar ratio of 2:3. The aldehyde ligand is a trialdehyde pyrogallol, and the amino ligand is an aromatic amine compound containing a nitrogen-containing heterocyclic ring. Step S2, a mixed organic solvent composed of mesitylene and 1,4-dioxane is added to the Pyrex reaction tube from Step S1, and an aqueous acetic acid solution is added as a catalyst to obtain mixture a. Step S3, the Pyrex reaction tube containing mixture a from Step S2 is ultrasonically treated to form a uniform suspension. This invention relates to the field of functional materials and photocatalysis technology. The structure is precisely designed, and the nitrogen-containing heterocyclic ring significantly modulates the D-A effect. In this invention, the 1,3,5-trihydroxypyrogallol and the nitrogen-containing heterocyclic amine ligand are covalently linked to form a donor-acceptor (D-A) structure with a significant electron push-pull effect within a covalent organic framework.

The present invention provides polymerizable compounds that, even without a catechol skeleton or pyrogallol skeleton, can impart or further enhance adhesiveness and tackiness, and can be used to prepare adhesive and tackiness-forming compositions and adhesive and tackiness polymers that can form adhesive layers with excellent adhesive and tackiness on various substrates. [Solution] The polymerizable compound is represented by the following general formula (1) and is useful as a material for preparing, for example, a composition for forming adhesive or tacky layers or an adhesive or tacky polymer. TIFF2026122770000020.tif41170 (In general formula (1), R represents a hydrogen atom or a methyl group)

To provide a desalination performance recovery agent for a polyamide membrane for recovering desalination performance of the polyamide membrane, a desalination performance recovery method of the polyamide membrane, and a desalination performance improvement method of the polyamide membrane.SOLUTION: The desalination performance-recovering agent for a polyamide membrane contains a solvent and any one of polyvinylpyrrolidone, pyrogallol, and polyvinyl alcohol mixed in the solvent, wherein the desalination performance-recovering agent in which polyvinylpyrrolidone is mixed in the solvent has a pH of 10 or less, the desalination performance-recovering agent in which pyrogallol is mixed in the solvent has a pH of 6 or less, and the desalination performance-recovering agent in which polyvinyl alcohol is mixed in the solvent has a pH of 9 or less.SELECTED DRAWING: Figure 4

The invention belongs to the technical field of concrete, and particularly relates to a mud-resistant polycarboxylate superplasticizer and a preparation method thereof. The mud-resistant polycarboxylate superplasticizer is prepared from a zwitterionic monomer, an unsaturated functional monomer containing a primary amine group, an unsaturated polyether macromonomer, an unsaturated acid monomer, formaldehyde, pyrogallic phenol, a chain transfer agent, an initiator, a reducing agent and deionized water. Wherein the zwitterionic monomer is carboxyl betaine methacrylate, and the unsaturated functional monomer containing the primary amine group is 2-aminoethyl methacrylate hydrochloride. The product has the characteristics that the silt content is gt; and in a severe aggregate environment with the content of 5%, extremely high effective adsorption capacity can be maintained only by low mixing amount, and the sensitivity of the concrete to the silt content of sand and gravel is remarkably reduced.

The invention relates to an application of a polycyclic polyisopentenyl phloroglucinol compound Atenuamione D, which is extracted and separated from Hypericum sampsonii Hance, in preparation of a medicine for treating hepatocellular carcinoma, in particular to an application of the polycyclic polyisopentenyl phloroglucinol compound Atenuamione D in preparation of a medicine for treating hepatocellular carcinoma. The in-vivo pharmacological research shows that the polycyclic polyisopentenyl phloroglucinol compound can obviously reduce the tumor weight of nude mice with hepatocellular carcinoma under the dosage of 25 mg / kg and 50 mg / kg, can reverse the purine metabolism abnormality of nude mice with hepatocellular carcinoma, and can be used for preparing the medicine for treating hepatocellular carcinoma.

The invention discloses a nitrogen-phosphorus / nitrogen-sulfur-doped hierarchical pore carbon material for a supercapacitor and a preparation method, and belongs to the technical field of preparation of carbon materials of supercapacitors. The technical problems that in the prior art, a hierarchical pore carbon material is poor in pore structure and impurity element doping coordination, and hierarchical pore regulation and control precision is insufficient are solved. The method comprises the following steps: firstly, preparing a soft template; the preparation method comprises the following steps: adding a prepolymer formed by m-aminophenol, formaldehyde and resorcinol or phloroglucinol into a soft template; wherein the pore-enlarging agent and the segmented copolymer form a supramolecular aggregate, and the supramolecular aggregate and the prepolymer are assembled through hydrogen bonds to obtain the phenolic resin gel. Adding an activating agent KOH into the phenolic resin gel for grinding; carrying out one-step carbonization activation reaction on the ground material to obtain an in-situ nitrogen-doped hierarchical porous carbon material; and finally, adding a doping agent into the in-situ nitrogen-doped hierarchical pore carbon material for grinding, and then putting into a ball milling tank for mechanical doping. No solvent is used in the operation process, so that the method is green and environment-friendly.

To provide a photosensitive resin composition that exhibits good developability and provides a resin cured film with favorable adhesion and favorable solvent resistance.SOLUTION: A modified polyol compound in which a part of hydroxyl groups possessed by a polyol compound is modified into a structure having an ethylenically unsaturated group, the polyol compound having two or more aromatic rings, and at least one of the aromatic rings taking one or more structures selected from the group consisting of a catechol structure and a pyrogallol structure.SELECTED DRAWING: None

The purpose of the present invention is to provide a novel cocrystal of Amenamevir having excellent solubility.　The present invention provides a cocrystal comprising Amenamevir and a coformer, in which the coformer is one or more selected from the group consisting of succinic acid, L-malic acid, D-malic acid, L-tartaric acid, D-tartaric acid, fumaric acid, maleic acid, phenol, salicylic acid, D-camphor, 1-naphthol, 2-naphthol, benzotriazole, vanillin, anthranilic acid, thiomalic acid, pyrogallol, hydroquinone lidocaine, chlorocresol, chlorobutanol, catechol, resorcinol, o-cresol, m-cresol, p-cresol, 1,2,4-trihydroxybenzene, 1,3,5-trihydroxybenzene, and 4-methylcatechol.

This invention discloses a biphenyl pyrogallol compound having the structure shown in formula (I). The biphenyl pyrogallol compound provided by this invention is an important intermediate for the synthesis of tripentate phosphite ligands of the biphenyl skeleton, playing a crucial role in hydroformylation reactions and their industrial applications. This invention also provides various methods for preparing biphenyl pyrogallol compounds, including an oxidative coupling method. The oxidative coupling method provided by this invention allows for the one-step synthesis of biphenyl pyrogallol compounds, offering advantages such as readily available and inexpensive catalysts, simple operation, good yield, low cost, and the ability to produce on a large scale.

The invention relates to the technical field of oily sewage treatment, and discloses a super-hydrophobic material and a preparation method and application thereof.The super-hydrophobic material comprises a substrate and a composite coating coated on the surface of the substrate, and the composite coating is a polymer network formed by a chain polymer and a polyphenol polymer modified by a hydrophobic unit through hydrogen bonds; the polyphenol polymer is a polymer of a catechol compound and / or a pyrogallol compound. The super-hydrophobic material has excellent mechanical stability and self-repairing capability, and has excellent and stable oil-water separation efficiency when being used for oil-water separation.

The invention belongs to the field of new materials of fine chemicals, tetra-halogen cyclohexanone is used as a raw material, efficient preparation of pyrogallic acid is realized under the action of carboxylate, and the preparation process is mild in reaction condition, simple to operate, high in yield and high in product purity, meets the detection standard, and has excellent industrial prospects.

This invention discloses a bamboo vinegar powder extract and its identification method and application. The bamboo vinegar powder extract contains at least one of pyrogallol, 4-methylcatechol, p-hydroxyphenylethanol, p-methylbenzoic acid, dihydrocaffeic acid, and 1,4-dibenzene. Among them, 4-methylcatechol and p-methylbenzoic acid have broad-spectrum antifungal effects, exhibiting very good antifungal activity against Aspergillus terreus CICC40377, Trichoderma longibrachiatum CICC40380, and Paecilomyces variotii CICC40716.

The invention discloses a pyrogallol derivative and a preparation method and application thereof, firstly provides pyrogallol derivatives shown as general formulas (A), (B) and (C) or pharmaceutically acceptable salts thereof, and further provides a preparation method of the pyrogallol derivative. Finally, the invention also discloses application of the pyrogallol derivative in preparation of a medicine for preventing or treating coronavirus infection. The pyrogallol derivative can inhibit the activity of SARS-CoV-2 Mpro, wherein R is selected from an adamantane derivative or a bicyclo [1.1. 1] pentane fragment.

This invention discloses a method for preparing a low-allergenic and highly stable peanut protein gel, belonging to the field of food processing technology. This invention utilizes a synergistic strategy of combining physical-chemical coupling pretreatment and laccase-catalyzed cross-linking of pyrogallol structural polyphenols. This makes peanut protein more readily acted upon by laccase, facilitates the entry of pyrogallol polyphenols into the protein network, and results in more uniform and complete enzymatic cross-linking, ultimately yielding a peanut protein gel with excellent gel strength and stability and lower allergenicity. Specifically, the synergistic effect of the physical / chemical coupling pretreatment ensures more thorough depolymerization of peanut protein and more complete molecular chain extension, exposing numerous reaction sites and laying the foundation for subsequent laccase-induced cross-linking of peanut protein with pyrogallol structural polyphenols to prepare the gel. Under laccase catalysis, the pyrogallol structural polyphenols are oxidized to polyquinone intermediates with more cross-linking sites, which bind to the active sites of the pretreated and modified peanut protein, ultimately forming a dense three-dimensional network structure peanut protein gel.