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  • US8288514B2 - Method of preparing clarithromycin - Google ,
    US8288514B2 - Method of preparing clarithromycin - Google ,

    This invention discloses a method of manufacturing clarithromycin, where an erythromycin A 9-oxime thiocyanate salt is used directly to perform an etherification reaction, and then successively silanizattion, methylattion and hydrolysis reactions are sequentially conducted It is a new process with simple process with a high yield, low cost, less pollution, high quality and is suitable for .

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  • The dehydration of fermentative 2,3‐butanediol into methyl ,
    The dehydration of fermentative 2,3‐butanediol into methyl ,

    Jing Wu, Yu-Jie Zhou, Wen Zhang, Ke-Ke Cheng, Hong-Juan Liu, Jian-An Zhang, Screening of a highly inhibitor-tolerant bacterial strain for 2,3-BDO and organic acid production from non-detoxified corncob acid hydrolysate, AMB Express, 101186/s13568-019-0879-1, 9, 1, (2019)

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  • Solubility in Different Solvents, Crystal Polymorph and ,
    Solubility in Different Solvents, Crystal Polymorph and ,

    Ya Jun Li,Kui Wu,Yang Li,Yang Zhang,Jing Jing Liu,Xue Zhong Wang The solubility of 2,2′-azobisisobutyronitrile (AIBN) in pure methanol, ethanol, acetone, benzene, ethyl acetate, and a mixture of methanol and water was measured in the temperature range from 26815 to ,

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  • Production of high-purity ethyl acetate using reactive ,
    Production of high-purity ethyl acetate using reactive ,

    Sep 01, 2008· The production of high-purity ethyl acetate (EtAc) using reactive distillation (RD) is studied experimentally in a pilot-scale plant The objectives are twofolds: (1) to realize the type-II RD process [YT Tang, YW Chen, HP Huang, CC Yu, SB Huang, MJ Lee, Design of reactive distillations for acetic acid esterification with different alcohols, AIChE J 51 (2005) 1683–1699] for ,

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  • Direct transformation of ethanol to ethyl acetate on Cu ,
    Direct transformation of ethanol to ethyl acetate on Cu ,

    Jul 13, 2010· The reaction of direct transformation of ethanol to ethyl acetate was investigated on reduced Cu/ZrO2 catalysts prepared by a co-precipitation procedure The catalytic performances of these Cu–Zr mixed oxides were considerably influenced by changing the molar ratio of Cu to Zr The highest selectivity to ethyl acetate was found over Cu/ZrO2(1) catalyst (molar ratio of Cu to Zr was 1)

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  • Frontiers | Use of Indigenous Hanseniaspora vineae and ,
    Frontiers | Use of Indigenous Hanseniaspora vineae and ,

    Oct 22, 2018· The XR produced the maximum concentration of isoamyl acetate (12090 μg/L), hexyl acetate (1695 μg/L), and ethyl lactate (19071 μg/L) R2 generated more ethyl acetate, but lower contents of ethyl octanoate, 2-phenethyl acetate, and isoamyl acetate

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  • ETHYL ACETATE: PROPERTIES, PRODUCTION PROCESSES AND ,
    ETHYL ACETATE: PROPERTIES, PRODUCTION PROCESSES AND ,

    process/techniques to obtain ethyl acetate 2 DEVELOPMENTS IN THE PRODUCTION PROCESS Generally, two types of catalysts have been used for the production of ethyl acetate, a) Homogeneous acid catalysts (eg mineral acids like HCl, H 2 SO 4, alkyl sulfonic acid, aromatic sulfonic acid, methane sulfonic acid, benzene sulfonic acid, p-

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  • Production of Ethyl Acetate by Esterification ,
    Production of Ethyl Acetate by Esterification ,

    Synthesizing Process Ethyl acetate is synthesized via the Fischer esterification reaction from ethanol and acetic acid, typically in the presence of an acid catalyst such as concentrated sulfuric ac Fischer esterification is a special type of esterification by refluxing a carboxylic acid and an alcohol in the presence of an acid catalyst

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  • Bringing Ethyl Acetate Production into the Biobased ,
    Bringing Ethyl Acetate Production into the Biobased ,

    Jun 27, 2016· Ethyl acetate is used extensively as a food additive or as a bulk industrial chemical However, like most bulk chemicals, they are traditionally produced from petrochemical resourc The use of petrochemical resources has various negative environmental and social impacts, which is why sustainable, biobased alternatives are being researched

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  • Process for the preparation of ethyl acetate - Davy ,
    Process for the preparation of ethyl acetate - Davy ,

    What is claimed is: 1 A process for the production of ethyl acetate which comprises: (a) converting a C 2 feedstock comprising ethanol to ethyl acetate in an ethyl acetate production zone by a procedure selected from: (i) dehydrogenation, and (ii) reaction with acetaldehyde (b) recovering from the ethyl acetate production zone an intermediate reaction product mixture comprising hydrogen and .

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  • Real-time analysis of intermediate products from non ,
    Real-time analysis of intermediate products from non ,

    Feb 01, 2021· Fig 1 shows the experimental for treating ethyl acetate under the NTP system The setup includes a gas supply and regulating system, an NTP system, and a PTR-MS instrument An air calibration ethyl acetate gas (100 ppmv, Shanghai Ji Liang Standard Reference Gases Co, Ltd, China) was used as the sample gas, and a high purity N 2 and O 2 (99999%) mixed gas with a volume ratio ,

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  • High Purity Ethyl Acetate Production with a Batch Reactive ,
    High Purity Ethyl Acetate Production with a Batch Reactive ,

    Ethyl acetate, available in 3 grades: 850-880%, 990%, and 995%, is used as an active solvent in industrial lacquers and surface coating resins It is also used as an extraction solvent in the production of pharmaceuticals and food, and as a carrier solvent for herbicides [1] The ethyl acetate ,

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  • Company Introduction - Shanghai Wujing Chemical Co Ltd ,
    Company Introduction - Shanghai Wujing Chemical Co Ltd ,

    Shanghai wujing Chemical Co, Ltd (referred to as wujing chemical industry) is a State-owned large chemical company built in 1958 self-reliance, work hard, created a new Chinese three milestones in the history of chemical engineering: design, installation and commissioning its own annual production capacity of 25,000 tons of ammonia plant; light oils into an annual output of 80,000 tons of .

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  • Ethyl Acetate Production and Manufacturing Process | ICIS
    Ethyl Acetate Production and Manufacturing Process | ICIS

    Apr 26, 2010· Solutia obtains ethyl acetate as a coproduct in production of polyvinyl alcohol, which the company uses captively in the manufacture of polyvinyl butyral In the main esterification process, a mixture of acetic acid and ethanol with a small amount of sulphuric acid is preheated and fed to an esterifying column where it is refluxed

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  • WO2013079659A1 - A process for producing ethyl acetate by ,
    WO2013079659A1 - A process for producing ethyl acetate by ,

    The invention refers to a process for producing ethyl acetate, which comprises reacting ethanol in presence of a base and in the presence of a ruthenium-based homogeneous catalyst system containing a tridentate pincer ligand

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  • Active Constituent in the Ethyl Acetate Extract Fraction ,
    Active Constituent in the Ethyl Acetate Extract Fraction ,

    Terminalia bellirica (Gaertn) Roxb fruit (TBF) is a widely planted traditional medicinal herb in Tibet We aimed to determine the most active substance-enriched extract by comparing the in vitro antioxidant activities of different extract fractions of TBF that were subsequently extracted by petroleum ether, chloroform, ethyl acetate, and

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  • US6809217B1 - Process for the preparation of ethyl acetate ,
    US6809217B1 - Process for the preparation of ethyl acetate ,

    US6809217B1 US09/806,184 US80618401A US6809217B1 US 6809217 B1 US6809217 B1 US 6809217B1 US 80618401 A US80618401 A US 80618401A US 6809217 B1 US6809217 B1 US 6809217B1 Authority US United States Prior art keywords ethanol ethyl acetate zone distillation bar Prior art date 1998-10-01 Legal status (The legal status is an assumption and is not a legal conclusion

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  • The main production process of ethyl acetate - Knowledge ,
    The main production process of ethyl acetate - Knowledge ,

    The main production process of ethyl acetate Mar 20, 2018 At present, the industrial production methods of ethyl acetate mainly include acetic esterification, acetaldehyde condensation, ethanol dehydrogenation, and acetic acid/ethylene addition The traditional acetic esterification process is being phased out in foreign countries, while the .

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  • Esterification of Acetic Acid and Ethanol in a Flow ,
    Esterification of Acetic Acid and Ethanol in a Flow ,

    DOI: 101002/CEAT201300467 Corpus ID: 97677238 Esterification of Acetic Acid and Ethanol in a Flow-Through Membrane Reactor Coupled with Pervaporation @article{Guo2014EsterificationOA, title={Esterification of Acetic Acid and Ethanol in a Flow-Through Membrane Reactor Coupled with Pervaporation}, author={Shiwei Guo and Benqiao He and J Li and Q Zhao and Yu Cheng}, journal={Chemical .

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