142 results about "Pyrogallol" patented technology

The invention discloses a preparation method of a copper ion mediated anticoagulant coating with function of in situ catalysis of NO release. The method includes steps of preparing an acidic buffer solution, and adding a compound with pyrogallol structure and certain concentration, a compound with amino or thiol, and copper ion soluble salt. The method of the invention has the advantages of simple operation, mild reaction conditions and easiness. The prepared coating has the advantages of controllable content of the units containing multiple amino or thiol compounds, and easily controlled loading amount of copper ion. The modified coating prepared by the method has excellent adhesion with a base material, and through act of the copper ions in the coating with the blood, the coating can conduct in situ catalyze the NO donor molecules in blood to continuously decompose and release NO molecules, thus realizing the inhibition of platelet activation and aggregation, inhibiting smooth muscle cell proliferation and migration, and protecting vascular endothelial layer function.

A method of making a facile, surface-independent, polyphenol coating is disclosed. In general, the method includes contacting at least a portion of the substrate to be coated with an aqueous solution containing one or more salts and one or more nitrogen-free phenolic compounds. Substrates of all kinds may be used, and compounds used to make the coating may include epigallocatechin-3-gallate (EGCG), epigallocatechin (EGC) and epicatechin-3-gallate (ECG), tannic acid, gallic acid, pyrogallol, and / or other nitrogen-free phenolic compounds. The coating made using the method, methods of using the coating, and kits comprising the coating precursors are also disclosed.

The invention discloses a preparation method of an anticoagulant material with function of inducing and catalyzing release of endogenous NO. The method comprises the steps of: configuring an alkaline Tris-buffer buffer solution, and adding a compound with certain concentration and pyrogallol structure and a compound with disulfide bond or diselenium bond and containing amino or thiol at two ends; and placing the substrate materials in a reaction solution, controlling the reaction temperature, reacting for 1-24 h, removing the substrate, and cleaning and drying to obtain the objective material. The invention has the advantages of simple operation, mild reaction conditions and easy operation. The component unit of the compound with disulfide bond or diselenium bond and containing amino or thiol at two ends has controllable content; the modified coating prepared by the method has excellent adhesion, and catalyzes the blood NO donors to continuously release NO molecules through in situ catalysis, inhibits activation and aggregation of platelets, inhibits proliferation of smooth muscle cells, and protects vascular endothelium.

The present invention provides improved process for the sulfonation of hydroxyaromatics amenable to direct isolation of the sulfonylated hydroxyaromatics in their free-acid forms. The process allows for the recyclization of sulfuric acid and minimizes waste. The starting materials are from a renewal resource, e.g., biomass, and contain detectable 14C up to a 14C content of 0.0000000001% (one part per trillion). The products made include sulfonated catechol, disulfonated pyrogallol and sulfonated protocatechuic acid.

The invention discloses a covalent organic framework material containing a beta-ketoenamine structure, and a preparation method and an application thereof. The covalent organic framework material hasa pyrene structural unit and the beta-ketoenamine structure. The preparation method comprises the following steps: uniformly mixing pyrenyl diphenylamine and 2,4,6-triformyl pyrogallol in an organic solvent, adding a weakly-acidic catalyst, and carrying out a reversible Schiff base reaction and an irreversible enol-ketone tautomerization reaction under solvothermal conditions so as to obtain the covalent organic framework material containing the beta-ketoenamine structure, wherein the beta-ketoenamine structure comprises a repeated unit as shown in a formula I or a formula II which are described in the specification. The covalent organic framework material provided by the invention has the advantages of high crystallinity, porosity, regular and ordered pore channel structure, high specificsurface area, low density, good thermal stability and chemical stability, and good application prospects in the fields of gas storage and separation, catalysis, sensing, energy storage and conversion, drug delivery and the like. In the formula I and the formula II, R is one selected from the group consisting of hydrogen and C1-C20 straight-chain or branched-chain alkyl or alkoxy groups.

The invention provides a polypyrrole / silver@silver chloride core-shell structure nano wire, and a preparation method and application thereof. A silver@silver chloride core-shell structure nano wire is synthesized by a two-step etching method at first; the silver@silver chloride nano wire is coupled with polypyrrole to prepare the polypyrrole / silver@silver chloride core-shell structure nano wire; the polypyrrole / silver@silver chloride core-shell structure nano wire has application potential in development of a photoelectric chemical sensor. Compared with the prior art, the silver nano wire disclosed by the invention can quickly transfer electrons and effectively stop recombination of electrons and holes; due to polypyrrole, an absorption range of an electrode to visible light is expanded, and the light current conversion efficiency is improved. By detection on pyrogallol, a polypyrrole / silver@silver chloride photoelectric chemical sensor has the advantages of quick response, high sensitivity, high selectivity and the like.

A method for preparing a lithographic printing plate by means of ink jet is disclosed. The ink jet fluid contains an oleophilizing compound chosen from the group consisting of a catechol, a pyrogallol, and a salicylic acid.

The invention discloses a high sensitivity positive thermosensitive CTP plate adopting active etherate in the condensation resin of biphenyltriphenol and divinylbenzene and a preparation method thereof, belonging to the technical field of graphic arts. The plate is composed of a base and an imaging layer. The base is obtained after carrying out cleaning, neutralizing, electrolyzing, oxidizing and hole sealing on the aluminium strips. The imaging layer is an imaging film which is prepared by the steps of dissolving 70-90 parts of film-forming resins, 2-10 parts of inhibitational resins, 2-5 parts of infrared dyes, 2-5 parts of color background dyes, 2-5 parts of photoacid generator and 2-5 parts of additives by weight into 800-900 parts of organic solvent by weight to form coating liquid, coating the coating liquid on the base and drying the coating liquid at 90-140 DEG C for 5-10min. The imaging film is 1.5-1.9g / m2 in thickness. The plate prepared in the invention has the characteristics of high sensitivity, good mesh point restoration, high resolution, high rate of printing resistance, low cost, high operation tolerance, wide application and the like.

The invention relates to a two-gradient phase-change thermal storage material and a preparation method thereof. The phase-change thermal storage material is prepared from the following material components in percentage by weight: 38 to 42% of p-methoxyphenol, 45 to 48% of pyrogallol, 4 to 6% of nanometer silica, 3 to 5% of nanometer graphite powder, 2% of polyoxyethylene fatty acid nonionic surfactant and 2% of hydroquinone. The preparation method of the two-gradient phase-change thermal storage material comprises the steps of adding p-methoxyphenol into a mixing kettle; heating to 60 to 70 DEG C; stirring for 1 hour; then sequentially adding the polyoxyethylene fatty acid and the hydroquinone; continuing to stir and heat to 150 to 160 DEG C; adding the pyrogallol into the mixing kettle; after stirring for 2 hours, sequentially adding the nanometer silica and the nanometer graphite powder; carrying out melting adsorption for 3 hours at a temperature of 150 to 160 DEG C; carrying out cooling pelletizing forming to obtain the phase-change thermal storage material. Gradient utilization of industrial waste heat can be implemented, and requirements of users for steam and hot water are met.

The invention discloses a high sensitivity positive thermosensitive CTP plate adopting active etherate in condensation resin of pyrogallol and acetone and a preparation method thereof, belonging to the technical field of graphic arts. The plate is composed of a base and an imaging layer. The base is obtained after carrying out cleaning, neutralizing, electrolyzing, oxidizing and hole sealing on the aluminium strips. The imaging layer is an imaging film which is prepared by the steps of dissolving 70-90 parts of film-forming resins, 2-10 parts of inhibitational resins, 2-5 parts of infrared dyes, 2-5 parts of color background dyes, 2-5 parts of photoacid generator and 2-5 parts of additives by weight into 800-900 parts of organic solvent by weight to form coating liquid, coating the coating liquid on the base and drying the coating liquid at 90-140 DEG C for 5-10min. The imaging film is 1.5-1.9g / m2 in thickness. The plate prepared in the invention has the characteristics of high sensitivity, good mesh point restoration, high resolution, high rate of printing resistance, low cost, high operation tolerance, wide application and the like.

The invention provides a preparation method of 2,3,4,4'-tetrahydroxyldiphenylketone, comprising the following steps: adopting sulfolane as solvent and pyrogallol as raw materials to perform a reactionat 120-160 DEG C for 6-10h in the presence of a catalyst system containing supported Lewis acid and phosphorus oxychloride, recycling supported Lewis acid catalyst through filtration, reducing pressure to recycle partial solvent sulfolane, neutralizing, adding a defined amount of distilled water, cooling to precipitate crystal, washing with water and finally drying to obtain the yellow target compound, wherein the yield can reach above 80% and the supported Lewis acid is 4-6mmol / g of ZnCl2 / montmorillonite, ZnBr2 / montmorillonite or AlCl3 / montmorillonite. Compared with the prior art, the invention has the advantage that (1) the catalysis efficiency of the supported catalyst is high and can be separated and recycled after the reaction, thus reducing the production cost; (2) the product yieldis high, the product is environmentally friendly and is applicable to mass industrialized production.

A safe biological diesel-oil consists of main antioxidant, synergist, deoxidant and solvent oil. The main antioxidant is 2-tert-4-methoxyphenol or3-tert-4-methoxyphenol or 2, 6-di-tert mixed phenol or 2-tert-hydroquinone or hemimelitic phenol or two or above substances mixture; synergist is mixture of ethylenediamine tetraacetic acid salt or citric acid, citrate ester or propanediol or poly-phosphoric acid or two or above substances mixture; deoxidant is vitamin E or carotenoid or ascorbic acid or ester ascorbate mixture or two or above substances mixture, main antioxidant is 4-6wt%, synergist is 2-36wt%, deoxidant is 4-6wt% and solvent oil is residue. It has better stability.

The polishing composition contains an abrasive, a microwaviness reducing agent, an oxidizing agent, a polishing accelerator, and water. The microwaviness reducing agent is a reducing agent and contains at least one kind selected from phosphonic acid, phosphinic acid, ammonium hypophosphite, ammonium sulfite, sodium sulfite, hydroquinone, pyrogallol, erysorbic acid, sodium erysorbate acid, L-ascorbic acid, formic acid, sodium formate, amumonium formate, oxalic acid, ammonium oxalate, ammonium iodide, and gallic acid. The abrasive can contain silicon dioxide, and the oxidizing agent can contain hydrogen peroxide. The accelerator can contain e.g. phosphoric acid, glycolic acid, maleic acid or succinic acid as well as diammonium hydrogen phosphate or ammonium dilhydrogen phosphate. The polishing composition can be used in polishing a substrate for a magnetic disk.

The invention provides an anti-oxidation non-aqueous decarbonization solution for trapping carbon dioxide in a mixed gas, and belongs to the technical field of carbon dioxide gas trapping. The invention relates to a non-aqueous decarbonization solution, which is composed of a main absorption component N-ethylethanolamine and a solvent N, N-diethylethanolamine. The non-aqueous decarbonization solution has high boiling point, low viscosity and fast absorption rate for carbon dioxide. The absorption capacity is high and the product is easy to regenerate. By adding the antioxidants 2-butanone oxime, pyrogallol, carbohydrazide and N, N'-bis(salicylidene)-1,2-propylenediamine, the main absorption component and the solvent can be effectively prevented from being oxidized by oxygen, thus guaranteeing good performance and service life of the non-aqueous decarbonization solution. The non-aqueous decarbonization solution of the invention is mainly used for trapping carbon dioxide in various chemical reaction tail gases, tail gases from steel plants and cement plants, ore decomposition gas, combustion flue gas, natural gas, city gas and biogas, and has a broad application prospect.

The invention discloses a class-I carboxymethyl lysine removing agent and application thereof. The removing agent is a quinones substance formed by the oxidization of polyphenol containing a catechol or pyrogallol structure unit. The removing agent is applied to the reduction of the content of carboxymethyl lysine in a food system. The quinones substance has stronger capability of removing AGEs (Advanced Glycation End Products) in the food system of which the pH is neutral or alkaline, and when the quinones substance is added after the food system generates the CML or before the CML is generated, the level of the CML in the system can be effectively reduced.

The invention discloses a quantitative detection reagent and a quantitative detection method for urinary protein liquid. The reagent is obtained by mixing pyrogallol solution with an intermediate solution. The intermediate solution is obtained by dissolving a certain amount of succinic acid, sodium benzoate and sodium molybdate in distilled water. By combining an automatic analyzer with the quantitative detection reagent for the urinary protein liquid, quantitative and accurate content of protein in a urine sample can be provided, so that accurate information can be provided to clinical doctors, and quantitative, automatic and fast detection of the urine sample can be achieved.

The invention discloses preparation and nitrile rubber hydrogenation application of a tannic acid rhodium coordination catalyst, belonging to the field of hydrogenation of unsaturated compounds containing carbon-carbon double bonds. Tannic acid can coordinate with rhodium chloride to generate a compound with a stable five-membered ring structure according to the chemical characteristics of a pyrogallol structure in the tannic acid, and an NBR (nitrile-butadiene rubber) homogeneous solution hydrogenation catalyst with high hydrogenation activity, high selectivity and good stability is prepared. The hydrogenation process conditions of NBR (nitrile-butadiene rubber) are as follows: the dosage of the catalyst accounts for 0.05-0.50% of the dry weight of the nitrile-butadiene rubber, the concentration of the solution is 2-10%, the intensity of pressure of hydrogen is 0.2-3 MPa, the reaction temperature is 60-160 DEG C, the reaction time is 2-24 hours, the dosage of triphenylphosphine accounts for 0-12 times of the dosage of the catalyst, and hydrogenated butadiene-acrylonitrile rubber (HNBR) with a hydrogenation degree of 98% can be prepared. The preparation and application of the invention are simple and safe, and the prepared catalyst is good in air stability so as to be stored for a long time. Furthermore, the catalyst is high in hydrogenation activity, good in selectivity, low in production cost and contributed to promoting the large scale production of the hydrogenated butadiene-acrylonitrile rubber.

The invention discloses an epoxy resin composition which comprises the following components in percentage by weight: (a) 20-80 percent by weight of epoxy resin; (b) 10-40 percent by weight of pyrogallol-divinyl benzene polycondensate resin; (c) 1-20 percent by weight of a curing agent; and (d) 0-40 percent by weight of an additive. The epoxy resin composition has good heat resistance and mechanical strength and can be applied to industries such as printing, electrons, paints and printing ink.

The invention relates to a phenolic resin composition. The phenolic resin composition comprises the following components by weight percent: a) 20-70% of phenolic resin; b) 10-40% of pyrogallol-divinyl benzene condensation resin; c) 1-20% of curing agent; and d) 0-40% of addition agent. The phenolic resin composition has favorable heat resistance and toughness, and can be applied to the industries of printing, electronics, coating, printing ink and the like.

The invention provides a method for preparing pyrogallol by taking imidazole as a gallic acid decarboxylation catalyst. The method comprises the following steps that: anhydrous gallic acid and imidazole solids are stirred, mixed and progressively heated under normal pressure; materials are melted, and a large amount of CO2 gas escapes at the same time; reaction temperature is kept between 145 and 150 DEG C till no bubble escapes from a reaction product and till the reaction product is detected to contain no gallic acid raw material through TLC; the reaction product is progressively heated to between 155 and 160 DEG C under reduced pressure (system pressure is between 2.0 and 2.67 kPa) so as to allow flores to escape, and the temperature is kept till no flores escapes; and the flores is ground, so a pyrogallol product is obtained. The method has the advantages of low decarboxylation temperature, high reaction speed, simple process, cheap catalyst, good catalytic effect, low catalyst alkalinity, few byproducts, high boiling point of catalyst, products quality assurance, high pyrogallol yield and capability of obtaining the high-purity product with no post-treatment.

The present invention provides a method for preparing a nanofiltration membrane by electrostatic spraying. The method is characterized by comprising step 1) of dissolving a pH buffering agent in waterto obtain a pH buffer solution, and adjusting the pH to 7.5 to 9.5; step 2) of dissolving reactive small molecules in the solution obtained in the step 1), and preparing a spray liquid; wherein the reactive small molecules are one or more of tannic acid, pyrogallol, catechol, catechin, 1, 2, 4-pyrogallol, epigallocatechin gallate, epigallocatechin and dopamine hydrochloride; step 3) of electrostatically spraying the solution obtained in step 2) onto a polymer ultrafiltration membrane wrapping a receiving roller of a device, and obtaining the nanofiltration membrane by removal. The nanofiltration membrane can be prepare by the one-step method, the method is simple and easy to implement, and zero discharge of waste liquid is achieved in the preparation process.

Oxygen scavenger which can exhibit excellent oxygen reduction effect in a wide variety of conditions is provided as an alternative volatile oxygen scavenger to hydrazine. The oxygen scavenger contains a heterocyclic compound having N-substituted amino group such as 1-amino-4-methylpiperazine and a hydroxylamine compound such as N,N-diethylhydroxylamine. The oxygen scavenger may further contain a polyhydric phenol type catalyst such as pyrogallol. By adding the oxygen scavenger to feed water of a water system of a boiler, oxygen reduction treatment of the water system is carried out.

The invention relates to the field of catalytic materials, in particular to a preparation method of a bowl-shaped carbon-molybdenum carbide composite material. The preparation method comprises the steps that hexadecyl trimethyl ammonium bromide, silicon dioxide micro-nanospheres, hydroquinone or resorcinol or pyrogallol, a formaldehyde solution, hydrazine hydrate and hydrazine hydrate or phosphomolybdic acid are mixed, stirred, dried and then subjected to calcining and heating treatment, and the composite material is obtained. According to the preparation method of the bowl-shaped carbon-molybdenum carbide composite material, the preparation process is simple, operation is convenient, technological parameters are easy to control, the obtained carbon particles have the bowl-shaped morphology and are uniform in particle size and high in dispersity, and a novel composite material obtained by compounding the carbon particles with molybdenum carbide is expected to be applied to the catalytic field.

The invention belongs to the field of marine chemical industry medicine intermediates, and particularly relates to a method for preparing pyrogallol and phloroglucinol, wherein the preparation route that trimethoxybenzaldehyde is subjected to catalysis decarbonylation under a hydrogen atmosphere is adopted, the modified raney nickel is adopted as a catalyst to carry out a catalysis decarbonylation reaction in a solvent, the modified raney nickel is subjected to bulk phase and surface modification based on the conventional raney nickel preparation method, the modified component is one or a plurality of materials selected from Mn, Fe, Cr, Mo, Ti and W, and the modified component content (wt) is 0.5-10 wt%. The method has characteristics of environmental protection, easy operation, wide raw material source, short reaction step, simple catalyst preparation and capability of being repeatedly applied multiple times, and is suitable for industrialization.

Disclosed is a chemical conversion coating solution which enables the formation of a chemical conversion coating film that has excellent corrosion resistance and good appearance and is reduced in the hexavalent chromium release amount. The chemical conversion coating solution comprises an acidic composition which comprises a water-soluble cobalt-containing substance in an amount of 0.1 to 3.0 g / Lin terms of a cobalt content, a pyrogallol compound in an amount of 0.05 to 3.0 g / L in terms of a pyrogallol content, and a water-soluble trivalent-chromium-containing substance in an amount of 1.5 g / L or more in terms of a chromium content all relative to the total amount of the composition, wherein the ratio of the content of the pyrogallol compound in terms of a pyrogallol content to the content of the water-soluble cobalt-containing substance in terms of the cobalt content is 0.015 to 10. When the composition is brought in contact with a metal surface of a member to form a chemical conversion coating film on the metal surface and the chemical conversion coating film is exposed to an environment of 80 DEG C and 100% RH for 72 hours, the hexavalent chromium concentration in the chemicalconversion coating film is less than 0.050 [mu]g / cm2 as determined by an analysis method in accordance with EN15205.

The invention provides a construction method of a yak copper zinc superoxide dismutase recombinant expression system and a recombinant expression protein. The method comprises the following steps of: cloning yak liver Cu, Zn-SOD cDNA by means of reverse transcription polymerase chain reaction; connecting the Cu, Zn-SOD cDNA to a pronucleus expression vector pET22b(+); building a recombinant pronucleus expression vector; converting the vector into a colon bacillus to build a gene engineering bacteria; performing IPTG induction expression to the gene engineering bacteria, and purifying Cu, Zn-SOD cDNA protein; and dialyzing the renaturation of the obtained protein by means of urea concentration gradient, and testing the enzymatic activity by means of pyrogallol automatic oxidation. The invention provides the effective and stable construction method of the yak Cu, Zn-SOD recombinant expression system and the recombinant expressed yak Cu, Zn-SOD protein. The invention enriches the SOD resources, reduces the production cost, and lays the foundation of the development and use of the SOD in the fields of autoimmune diseases treatment, pharmacy, health care products, food and cosmetics, etc.

The invention provides a meadow moth and scarab attractant. The meadow moth and scarab attractant comprises, by weight, 25-30 parts of meadow moth sex hormone extracts, 15-20 parts of scarab sex hormone extracts, 25-30 parts of sunflower extract powder, 7-10 parts of pyrogallol, 5-7 parts of myricetin, 6-9 parts of quercetin, 12-15 parts of p-tert-butylphenyl salicylate, 20-30 parts of ethyl acetate and 5-8 parts of tebufenozide. The meadow moth and scarab attractant has the advantages that excellent meadow moth and scarab trapping and killing effects can be realized by the attractant, the meadow moth trapping quantity can reach 70-135 per trap within 20 days, and the scarab trapping quantity can reach 65-112 per trap within 20 days.

The invention relates to a new polymer compound, namely a fullerene galactoside derivative, which is a fullerene mono- and / or bis-addition acetylated galactoside. The invention also relates to a preparation method for the fullerene galactoside derivative, and application of the fullerene galactoside derivative in removal of free radicals. The fullerene galactoside derivative can make the auto-oxidation rate of pyrogallol reduced, which indicates that the derivative has the capacity of removing super oxygen negative ion free radicals, is a good antioxidant, and is widely applied to the fields of biomedicines and cosmetics.

The invention discloses an application of active etherate containing pyrogallol acetonide resin as heat-sensitive CTP thermo-sensitive imaging liquid of dissolution inhibitor, relating to the technical field of optical information recording material application. The imaging liquid comprises the following components: film-forming resin, dissolution inhibitor, infrared dye, coloring background dye, acid-forming agent, additive and solvent. The dissolution inhibitor is the active etherate of the pyrogallol acetonide resin, which decomposes and releases an alkaline solubility group-phenolic hydroxyl under the action of protonic acid produced in an exposure area, thereby creating a large dissolution difference between the exposure area and a non-exposed area, and increasing the developing and imaging performances of plates. The dissolution inhibitor can obviously increase sensitivity and aging resistance, development latitude and comprehensive imaging performance of the heat-sensitive CTP plate.

The invention discloses a preparation method and application of polystyrene macroreticular resin containing multiple phenolic hydroxyl groups, belonging to the technical field of high molecular materials. The preparation method is characterized by being a one-pot preparation method comprising the following steps: organic phase preparation, water phase preparation and suspension polymerization; anda copolymerization bead body is subjected to steam distillation, and after a pore-foaming agent is completely evaporated out, an initiator II and pyrogallol are sequentially added into a reaction kettle. The preparation method has the beneficial effects that the preparation is carried out by virtue of the one-pot method, so that the process time is greatly shortened, the process steps are simplified, and the occupation of a large number of production equipment and sites caused due to frequent material guiding is avoided; and pyrogallol is creatively utilized, and the polystyrene macroreticular resin prepared through the one-pot method by taking polystyrene as a skeleton has a relatively high specific surface and contains multiple phenolic hydroxyl groups, so that a hydrogen bond cluster body can be easily formed by proteins, and the polystyrene macroreticular resin has the excellent properties of strong protein adsorption capacity, high adsorption quantity, good selectivity, easinessin regeneration, long service life, stable performance and the like.