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46results about How to "Promote esterification" patented technology

Esterification modification method for wood fiber biomasses

The invention discloses an esterification modification method for wood fiber biomasses, comprising the following steps of: firstly, pretreating wood fiber biomasses, i.e. drying and smashing; carrying out pre-ball milling; adding esterification reagent, and continuously carrying out ball milling to carry out an esterification modification reaction; and washing and drying products after the reaction to obtain the esterified modified products of the wood fiber biomasses. According to the method, various wood fiber biomasses are taken as raw materials, wide in source, low in cost, and high in resource utilization rate, and the conventional mode of the single modified cellulose can be changed; and the wood fiber biomasses are esterified in the process of ball milling, the esterification reaction can be carried out within a dissolved homogeneous system or a heterogeneous system in which the solvent is dispersion medium, and the esterification modification method is simple in modifying technology, environment-friendly, and free from the generation of 'the three wastes', and does not need recover the solvent. The infrared and weighing method result shows that the product is good in esterification effect, very good in practical applicability, and better in economic prospect.
Owner:NANJING FORESTRY UNIV

Method for esterifying olefin and organic acid

A process for synthesizing ester by alkenes, organic acid, alkyl pyridine end link sulfuric group or ion liquid composed of 1,3-Dialkyl imidazole positive ion and negative ion as reaction mediator and catalyst includes taking reaction alkenes with organic acid by catalyst to get carboxylic ester 1-8 hours in 0.1-2.0 MPA at 50-150 deg.C.
Owner:LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI

Controllable-degradation PBAT/PLA (poly(butyleneadipate-co-terephthalate)/polylactic acid) composite film and preparation method thereof

The invention relates to the technical field of PBAT / PLA (poly(butyleneadipate-co-terephthalate) / polylactic acid) blend compatibilization, particularly a controllable-degradation PBAT / PLA composite film. The controllable-degradation PBAT / PLA composite film comprises the following components in parts by weight: 50-60 parts of PBAT, 10-30 parts of PLA, 10-20 parts of calcium carbonate, 0.5-2 parts of antibacterial compatibilizer and 0.5-2 parts of tetrabutyl titanate. The mass ratio of the PLA to the calcium carbonate is (1-3):1. The PLA / calcium carbonate proportion is strictly controlled and restricted within the range of (1-3):1; and the PLA / calcium carbonate proportion can be regulated to control the degradation start time of the PBAT / PLA composite film at 60-90 days and control the complete degradation time at 120-150 days.
Owner:常州绿之源高分子材料有限公司

Two-step feeding synthesis method of high-performance poly(ether ester) elastomer

ActiveCN104371094AAvoid the effect of esterification reactionHigh molecular weightPolyesterElastomer
The invention discloses a two-step feeding synthesis method of a high-performance poly(ether ester) elastomer. The two-step feeding synthesis method comprises the following steps: mixing dicarboxylic acid, dihydric alcohol and a catalyst, and reacting, so as to obtain a polyester hard segment; enabling the polyester hard segment to react with polyether polyol, an antioxidant and a catalyst to obtain the high-performance poly(ether ester) elastomer. The two-step feeding synthesis method is simple in process, easy to operate, good in controllability, safe, environmentally friendly, and low in cost; the inhibiting effect on esterification reaction in polyester hard segment synthesis caused by the polyether polyol is avoided; the side reaction of thermal degradation caused by long-term reaction of the polyether polyol at relatively high temperature is reduced; and therefore, the poly(ether ester) elastomer with high molecular weight, controllable molecular weight of the polyester hard segment and the polyether soft segment and excellent performance is obtained.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI

Method for preparing carboxylic ester

The invention provides a method for preparing carboxylic ester. After liquid-phase ionic liquid at room temperature is taken as a catalyst and an extracting agent at the same time to catalyze the reaction of olefin and carboxylic acid to generate carboxylic ester, the generated carboxylic ester is separated from carboxylic acid which does not react. During the whole reaction, the molar ratio of carboxylic acid to ionic liquid to olefin in a reaction system is always kept at 0.2-5:1:0.1-10; absolute pressure is controlled between 0.05 and 5.0 MPa; reaction temperature is controlled between 10 and 110 DEG C; and the space velocity of the carboxylic acid added during the reaction is controlled between 0.1 and 500. The method has the advantages of further rasing the conversion rate of carboxylic acid, reducing production cost and reducing pollution caused for environment.
Owner:BEIJING SHIDA HUADING TECH

Liquor aging device

The invention belongs to the technical field of liquor aging and particularly relates to a liquor aging device. The liquor aging device comprises an aging barrel externally wound with an electromagnetic induction coil, wherein an alternating current power supply is connected to the end part of the electromagnetic induction coil, a stirring rod is arranged in the aging barrel, an interlayer is arranged in the middle of the bottom of the aging barrel, and a magnet is arranged in the interlayer; the stirring rod is a conductor and is externally sleeved by a heat-conducting stirring sleeve, and anion oxidizing particles are arranged between the stirring rod and the stirring sleeve; and a chassis is connected to the bottom end of the stirring rod in a rotating way, stirring blades are fixedly mounted on the chassis, and a filtering hole with the diameter smaller than diameters of the anion oxidizing particles is formed in the outer wall of the stirring sleeve. According to the liquor aging device, the problem that the aging effect is poor when air is directly introduced into the liquor is solved.
Owner:贵州省仁怀市茅台镇汉室酒业(集团)有限公司

High-heat-resistant amorphous polyester preparation method

The invention provides a high-heat-resistant amorphous polyester preparation method, which comprises: using terephthalic acid and ethylene glycol as main reaction raw materials, adding modified monomers 1,4-cyclohexane dimethanol and spiro diol, and carrying out direct esterification by using a tin / phosphorus / antimony composite catalyst to prepare the high-heat-resistant amorphous polyester. According to the present invention, the tin compound is added as the esterification catalyst at the esterification stage, the phosphorus compound is added to passivate the tin catalyst after the esterification is completed, and the antimony-based catalyst is added as the condensation polymerization catalyst, such that the catalysis effect of the tin compound to the esterification reaction can be ensured, and the problems that the tin catalyst as the condensation polymerization catalyst can yellow the polyester to cause the poor thermal stability of the product can be avoided.
Owner:SINOPEC YIZHENG CHEM FIBER +1

Mature vinegar making method

A brewing method of mature vinegar. After steaming bran with water, adding koji essence, ventilating koji on a koji bed to obtain bran koji; mixing and crushing sorghum and rice to obtain a mixed powder, adding water and confirming the material at normal temperature to obtain Cooked grain; mix bran and cooked grain and break it into a mixture, add water content, saccharify at room temperature and control the alcohol content of the mixture after saccharification to 7°~8°; mix sorghum husk, bran and saccharification Mix the raw materials and put them into the acetic acid fermentation tank to ferment to obtain the fermented materials; pour the fermented materials into the vinegar drenching tank, add warm water, soak for 4-5 hours, and then sterilize with steam to obtain aged vinegar. The advantages are: simple process, short production cycle, unique product flavor, bright reddish-brown color, appropriate concentration, strong vinegar aroma, pure ester aroma, and the obtained mature vinegar is sweet and sour.
Owner:姜维印

New type non-agitating kettle with two regions for esterifying polyester

InactiveCN1687179ASave spaceFewer potsPolyesterEngineering
The present invention relates to a non-stirring double-zone polyester esterification still. Its first esterification zone can utilie density difference to implement natural circulation, and uses esterification method to dissolve PTA powder so as to implement homogeneous reaction, then second esterification zone can make the material flow along the flow-induced helical plate or multi-ring flow-induced ring plate so as to implement plug flow, and can fully utilize reaction driving force, its still-discharging esterification rate can be up to 96.5%-97%.
Owner:BEIJING INNOVATION POLYMERIZATION TECH

Tartary buckwheat white spirit and brewing process thereof

The invention belongs to the technical field of wine brewing, and discloses tartary buckwheat white spirit and a brewing process thereof. From the perspective of a brewing process of the tartary buckwheat white spirit, tartary buckwheat rice is used as a raw material, and through emulsion adjustment, roller curing, pH value adjustment, fermentation, distillation and the like, the tartary buckwheatflavor of the tartary buckwheat white spirit is effectively enhanced, and the liquor yield is increased, wherein an organic acid solution is added during emulsion mixing, starch is promoted to be decomposed into micromolecular sugar, fermentation is facilitated, organic acids react with alcohol, generated ester substances can effectively improve the fragrance of the white spirit, the flavor of the buckwheat flavor of the tartary buckwheat white spirit is enriched, and the sweetness of the tartary buckwheat white spirit is also improved due to addition of the organic acid; a roller drying andcuring technology is used for quickly curing the raw materials, so that the generation of sugar is facilitated, and the yield of the white spirit is increased; liquid state fermentation is adopted, sothat the tartary buckwheat white spirit has a unique tartary buckwheat flavor; the fermentation product vinasse liquid is used for replacing traditional water for the first time, esterification of alcohol and acid is effectively promoted, aroma production is enhanced, and the aroma of the wine body is enhanced.
Owner:FOSHAN UNIVERSITY

Preparation method of pentaerythritol diphosphate

The invention relates to the technical field of organic synthesis, and provides a preparation method of pentaerythritol diphosphate. The phosphoryl dichloride compound is prepared from a phenolic compound and phosphorus oxychloride under the condition of a catalyst, the yield of the phosphoryl dichloride compound is high, the activity of the phosphoryl dichloride compound is high, and the next step of reaction can be directly carried out without drying; then the phosphoryl dichloride compound is reactd with pentaerythritol under the vacuum pressure reduction condition, acid generated in the reaction can be rapidly removed under the vacuum pressure reduction condition, and the reaction can be carried out in the forward direction; furthermore, a phosphoryl dichloride compound is dropwise added, after dropwise adding is completed, esterification can be completed basically by one acyl chloride, and at the moment, an acid-binding agent is added, so that esterification of a second acyl chloride is facilitated, and the reaction time is greatly shortened; and the reaction temperature can be reduced under the vacuum decompression condition, the problems of acidolysis of pentaerythritol diphosphate and reaction with hydrogen chloride are avoided, the reaction safety and operability are improved, and the reaction efficiency is improved.
Owner:ZHEJIANG WANSHENG

Marine-derived high temperature lipase as well as crystals and preparation method thereof

The invention belongs to the technical field of enzyme engineering, and discloses marine-derived high temperature lipase as well as crystals and a preparation method thereof. The amino acid sequence of the marine-derived high temperature lipase is shown in SEQ ID NO. 1. The preparation method of the marine-derived high temperature lipase comprises the steps of cloning a sequence of the marine-derived high temperature lipase into a pET22b(+) prokaryotic expression vector and transferring the vector into escherichia coli competent cells Rosetta (DE3) for expressing, and purifying by means of affinity chromatography and exclusion gel chromatography to obtain a marine-derived high temperature lipase aqueous solution. The lipase provided by the invention has very good high temperature and organic solvent tolerance, has high efficiency in esterification and hydrolysis of lipids, and is even better in effect of esterification synthesis of triglyceride than commercial lipase 435 (novozymes).
Owner:SOUTH CHINA UNIV OF TECH

Method for improving aroma and taste of red wine by utilizing pottery jar

The invention discloses a method for improving aroma and taste of red wine by utilizing a pottery jar, and belongs to the technical field of wine production. According to the method provided by the invention, the wine is aged by using the pottery jar and adding an oak product, so that the flower fragrance and the fruit fragrance with the characteristics of the wine can be reserved, meanwhile, and the flavors of baking, smoking and the like stored in an oak barrel are combined, the characteristic pottery fragrance stored in the pottery jar is highlighted, and the fragrance attribute of the wine can be enriched. Contrast experiments show that the red wine treated by the method is rich in flower fragrance and fruit fragrance, has the smoking and baking fragrance of oak, and highlights the pottery faint scent stored in the pottery jar. The storage method can also improve the taste quality of the wine, reduce the astringency of the wine, and make the wine body softer.
Owner:JIANGNAN UNIV

Preparation method of (methyl)acrylate substances and application of 2-acrylamide-2-methylpropanesulfonic acid

The invention relates to a preparation method of (methyl)acrylate substances and application of 2-acrylamide-2-methylpropanesulfonic acid. The invention also discloses application of the 2-acrylamide-2-methylpropanesulfonic acid (AMPS) as a catalyst to esterification reaction. The inventor of the invention finds that the 2-acrylamide-2-methylpropanesulfonic acid (AMPS) can be used as a catalyst tocatalyze an esterification reaction, and has good catalytic activity and high yield. When the 2-acrylamide-2-methylpropanesulfonic acid is applied to preparation of (methyl)acrylate substances, the process is simple, the catalytic effect is good, and 2-acrylamide-2-methylpropanesulfonic acid and (methyl)acrylic acid are dissolved in the esterification process, so that esterification is facilitated. Besides, the solubility of the 2-acrylamide-2-methylpropanesulfonic acid at a low temperature is low, and cooling is carried out after the esterification reaction, thus the 2-acrylamide-2-methylpropanesulfonic acid is crystallized and separated out due to the reduction of the solubility, and the 2-acrylamide-2-methylpropanesulfonic acid can be recycled through filtration and separation.
Owner:GUANGDONG BOSSIN NOVEL MATERIALS TECH CO LTD +1

Baijiu brewing method for accelerating ripening and preventing retrogradation

The invention relates to a Baijiu brewing process, and in particular, relates to a Baijiu brewing method for accelerating ripening and preventing retrogradation. A method adopting Ru porcelain and / orRu porcelain glaze powder mixed in pit mud and / or distiller's grains in fermentation is adopted for Baijiu brewing. The method has the advantages that with the characteristics of piezoelectric effectproduced by the Ru porcelain or Ru porcelain glaze powder in the fermentation environment of Baijiu, an electromagnetic field which can promote reduction of the self-diffusion coefficient of ethanol molecular clusters can be produced, so the enhancement of the self-diffusion coefficient of ethanol at high temperature is restrained, the mouthfeel of Baijiu is improved and a ripening accelerating effect is played. On the other hand, the formation of compounds in Baijiu is basically completed in the process of fermentation, so when the fermentation of Baijiu is completed, the compounds in Baijiuform a relatively stable structure. Therefore, compared with a method of accelerating the ripening of Baijiu after completion of the fermentation, the method can effectively prevent retrogradation ofBaijiu.
Owner:泸州市凤凰老窖曲酒厂

Method for rapid maturation of distilled spirits using light and heat processes

An improved system and process for rapidly producing distilled spirits having characteristics associated with a much longer maturation process is provided. The method involves contacting wood with an unmatured distilled spirit under heated conditions and contacting the resulting heat-treated spirit with actinic light. The disclosure provides embodiments where a spirit is sequentially processed through heat and actinic light treatment. The disclosure also provides embodiments where a heat-treated spirit is mixed with a spirit that has been separately treated with light to give characteristics of a mature spirit.
Owner:LOST SPIRITS DISTILLERY

Liquor aging device

The invention belongs to the technical field of liquor aging and particularly relates to a liquor aging device. The liquor aging device comprises an aging barrel externally wound with an electromagnetic induction coil, wherein an alternating current power supply is connected to the end part of the electromagnetic induction coil, a stirring rod is arranged in the aging barrel, an interlayer is arranged in the middle of the bottom of the aging barrel, and a magnet is arranged in the interlayer; the stirring rod is a conductor and is externally sleeved by a heat-conducting stirring sleeve, and anion oxidizing particles are arranged between the stirring rod and the stirring sleeve; and a chassis is connected to the bottom end of the stirring rod in a rotating way, stirring blades are fixedly mounted on the chassis, and a filtering hole with the diameter smaller than diameters of the anion oxidizing particles is formed in the outer wall of the stirring sleeve. According to the liquor aging device, the problem that the aging effect is poor when air is directly introduced into the liquor is solved.
Owner:贵州省仁怀市茅台镇汉室酒业(集团)有限公司

Cellaring method of Maotai-flavor liquor

The invention relates to a cellaring method of Maotai-flavor liquor. The cellaring method comprises the following steps of: (1) selecting and packaging a liquor storage device: selecting a ceramic container as the liquor storage device, and adopting a breathable film and straw as packaging materials; adding brewed finished liquor into the liquor storage device, sealing by adopting the breathable film, and then attaching a layer of straw; (2) carrying out secondary sealing: coating the surface of the liquor storage device with a mud layer by adopting viscous composite pit mud; (3) treating a cellaring room: selecting an underground layer as the cellaring room, and paving a layer of composite paving material with the thickness of 8 to 10cm on the cellaring room; coating the wall of the cellaring room with the composite pit mud; and (4) cellaring: orderly placing the sealed liquor storage device on the composite paving material, controlling the humidity, and cellaring. According to the cellaring method provided by the invention, the content of harmful substances in the Maotai-flavor liquor can be effectively reduced, the content of beneficial components in the liquor is increased, andthe quality of the Maotai-flavor liquor is improved; moreover, the cellaring time is short, and the production cost is lower.
Owner:贵州马灯酒业有限公司 +1

Modified polyester, preparation method thereof, and modified polyester film preparation method

InactiveCN110437429AGood esterification effectSpeed up evaporationCopolyesterPropylene glycol
The invention discloses a modified polyester, a preparation method thereof, and a modified polyester film preparation method, and belongs to the field of polyester. According to the preparation method, spiroglycol and 2, 2-dimethyl-1, 3 propylene glycol are taken as copolymerization modification monomers, direct esterification method is adopted to synthesize a copolyester with a glass-transition temperature higher than 100 DEG C; film prepared of the modified polyester is capable of satisfying battery label film requirements; a tin / phosphorus / antimony composite catalyst is adopted in preparation of the modified polyester; in the esterification period, a tin compound is added as an esterification catalyst; after esterification, a phosphorus compound is added for passivation of the tin catalyst; and a antimony series catalyst is added as a polycondensation catalyst. According to the above steps, the tin compound is capable of achieving catalyst effect on esterification reaction, and yellowing and thermal stability reduction caused by taking the tin compound as a polycondensation catalyst are avoided.
Owner:CHINA PETROLEUM & CHEM CORP +1

Method for rapid maturation of distilled spirits using light and heat processes

An improved system and process for rapidly producing distilled spirits having characteristics associated with a much longer maturation process is provided. The method involves contacting wood with anunmatured distilled spirit under heated conditions and contacting the resulting heat-treated spirit with actinic light. The disclosure provides embodiments where a spirit is sequentially processed through heat and actinic light treatment. The disclosure also provides embodiments where a heat-treated spirit is mixed with a spirit that has been separately treated with light to give characteristics of a mature spirit.
Owner:LOST SPIRITS DISTILLERY

Method for homogeneous synthesis of di (2-ethylhexyl) terephthalate

The invention discloses a method for homogeneous synthesis of di (2-ethylhexyl) terephthalate, and belongs to the technical field of plasticizer DOTP preparation. According to the method disclosed by the invention, a specific and suitable solvent NMP is used, tetrabutyl titanate is taken as a catalyst, an acid alcohol raw material is catalyzed for esterification, reaction only needs 4 hours, the reaction acid value is reduced to 1mg KOH / g, and the esterification rate of the obtained product reaches 99%. Compared with a heterogeneous esterification reaction of DOTP without a solvent, the method has the advantages that the reaction time is shortened by half, the energy consumption of the reaction is greatly reduced, and the heat loss in the reaction process is reduced. According to the method, the existing heterogeneous reaction is converted into homogeneous reaction, the esterification reaction efficiency is greatly improved, the reaction time is shortened, an excellent esterification effect is achieved, and the method has a wide application prospect in industry.
Owner:JIANGNAN UNIV +1

Utilize the method for solid acid-base catalyzed synthesis of vinpocetine

The invention discloses a method for catalyzed synthesis of vinpocetine by using solid acid and alkali. The method comprises the following steps: 1, carrying out hydrolysis of solid alkali, namely feeding a vincamine ethanol solution to a solid alkali hydrolysis column to carry out a hydrolysis reaction; 2, dewatering by a molecular sieve, namely carrying out a dewatering reaction on the hydrolyzed vincamine ethanol solution through a molecular sieve dewatering column; and 3, dewatering and esterifying solid acid, namely feeding the dewatered feed liquid to a solid acid dewatering and esterifying column to carry out solid acid dewatering and esterifying. Strong alkali instead of sodium hydroxide is adopted to catalyze hydrolysis of vincamine; and solid strong acid instead of concentrated sulfuric acid is used for carrying out dewatering and esterifying, so as to obtain the vinpocetine. A catalyst used by the method can be conveniently separated from a product, so that the production cost is reduced. According to the method disclosed by the invention, no acid-alkali wastewater is generated in the production process; the method is environment-friendly and more suitable for industrial production, and can be repeatedly used; the production cost can be effectively reduced; and the used solid acid and alkali are free of corrosion on equipment, environment-friendly, and do not generate acid-alkali wastewater.
Owner:成都上交致远生物科技有限公司

Preparation method of PTT-based (polytrimethylene terephthalate-based) low-melting-point copolyester

The invention provides a preparation method of a PTT-based (polytrimethylene terephthalate-based) low-melting-point copolyester. The PTT-based low-melting-point copolyester is prepared by subjecting terephthalic acid, 1,3-propanediol, 1,6-adipic acid, a diol solution of a titanium-containing catalyst and a stabilizer to esterification before copolycondensation. The catalyst with double-titanium diol titanium structure is synthesized through unique design and has good stability and diol solubility; the catalyst may efficiently catalyze esterification and copolycondensation, is highly adaptive to copolycondensation catalysis under different ratios, and helps evidently solve the problem that an existing titanium-containing catalyst can accelerate thermal degradation of the copolyester. The finished product prepared via the preparation method of the PTT-based low-melting-point copolyester has a melting point of 110.7-209.3 DEG C and high characteristic viscosity (0.975-1.312 dl / g), is wellcombine-spinnable with conventional PET (polyethylene terephthalate), and has good color and good melt thermal stability.
Owner:ZHONGYUAN ENGINEERING COLLEGE

New type non-agitating kettle with two regions for esterifying polyester

InactiveCN1279083CSave spaceFewer potsPolyesterEngineering
The invention relates to a non-stirred dual-zone polyester esterification kettle. The first esterification zone is naturally circulated by density difference, and the esterification product is used to dissolve PTA powder to realize a homogeneous reaction; The circle guides the flow of the ring plate to realize the push flow and make full use of the reaction driving force. The rate of esterification out of the still can reach 96.5-97%.
Owner:BEIJING INNOVATION POLYMERIZATION TECH

A preparation method of (meth)acrylic ester substance and application of 2-acrylamide-2-methylpropanesulfonic acid

The invention relates to a preparation method of (methyl)acrylate substances and application of 2-acrylamide-2-methylpropanesulfonic acid. The invention also discloses application of the 2-acrylamide-2-methylpropanesulfonic acid (AMPS) as a catalyst to esterification reaction. The inventor of the invention finds that the 2-acrylamide-2-methylpropanesulfonic acid (AMPS) can be used as a catalyst tocatalyze an esterification reaction, and has good catalytic activity and high yield. When the 2-acrylamide-2-methylpropanesulfonic acid is applied to preparation of (methyl)acrylate substances, the process is simple, the catalytic effect is good, and 2-acrylamide-2-methylpropanesulfonic acid and (methyl)acrylic acid are dissolved in the esterification process, so that esterification is facilitated. Besides, the solubility of the 2-acrylamide-2-methylpropanesulfonic acid at a low temperature is low, and cooling is carried out after the esterification reaction, thus the 2-acrylamide-2-methylpropanesulfonic acid is crystallized and separated out due to the reduction of the solubility, and the 2-acrylamide-2-methylpropanesulfonic acid can be recycled through filtration and separation.
Owner:GUANGDONG BOSSIN NOVEL MATERIALS TECH CO LTD +1

A flavor compound bacterial agent for reducing rice wine fusel oil and its application

The invention discloses a flavor compound bacterial agent for reducing fusel oil of fermented grains, which is prepared by the following method: (1) preparing a suspension of Aspergillus oryzae spores, cyanobacteria, and Bacillus licheniformis; (2) using polyvinyl alcohol (PVA ) and carboxymethyl chitosan (CMCS) as the wall material, glutaraldehyde (GA) as the cross-linking agent to prepare mid-logarithmic Saccharomyces cerevisiae suspension containing polyoxyethylene sorbitan monostearate; (3) Hydroxypropyl methylcellulose embeds the water-soluble extract of the esterified red yeast rice lysate; (4) The corncob is used as a carrier to carry fermentation microorganisms and auxiliary materials to form a composite microbial agent. The compound microbial agent can effectively reduce fusel oil, and also has good effects in improving liquor yield, ester flavor, amino acid nutrition and sensory.
Owner:HUBEI UNIV OF TECH
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