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Highly efficient catalyst for 1,1,2-trichloroethane dehydrochlorination via BN_(3) frustrated Lewis acid-base pairs

Nano Research 2024年第6期17卷 4773-4781页

作者： Yuxue Yue Fangmin Zuo Bolin Wang Xiaoling Xian Jun Tang Haifeng Zhang Zilong Zhang Qingping Ke Wei Chen School of Chemical Engineering Northeast Electric Power UniversityJilin 132012China Industrial Catalysis Institute of Zhejiang University of Technology Hangzhou 310014China Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China College of Chemistry and Chemical Engineering Anhui University of TechnologyMaanshan 243002China

In this study,a novel non-metallic carbon-based catalyst co-doped with boron and nitrogen(B,N)was successfully *** precisely controlling the carbonization temperature of a binary mixed ionic liquid,we selectively modified the doping site structure,ultimately constructing a B,N co-doped frustrated Lewis acid-base pair *** catalyst exhibited remarkable catalytic activity,selectivity,and stability in the dehydrochlorination reaction of 1,1,2-trichloroethane(TCE).Detailed characterization and theoretical calculations revealed that the primary active center of this catalyst was the BN_(3)*** to conventional graphitic N structures,the BN_(3)structure had a higher p-band center,ensuring superior adsorption and activation capabilities for TCE during the *** the BN_(3)site,three negatively charged nitrogen atoms acted as Lewis bases,while positively charged boron atoms acted as Lewis *** synergistic interaction facilitated the specific dissociation of chlorine and hydrogen atoms from TCE,significantly enhancing the 1,1-dichloroethene *** this research,we not only explored the active site structure and catalytic mechanism of B,N co-doped catalysts in depth but also provided an efficient,selective,and stable catalyst for the dehydrochlorination of TCE,contributing significantly to the development of non-metallic catalysts.

关键词： B N co-doped sites dehydrochlorination frustrated Lewis acid-base pairs catalytic mechanism

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Phosphorus and nitrogen co-doped graphene for catalytic dehydrochlorination of 1,2-dichloroethane

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Chinese Journal of Chemical Engineering 2023年第12期64卷 149-155页

作者： Haonan Yu Xiaofeng Yang Hongbin Yang Jinming Xu Yanqiang Huang CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China

A phosphorus and nitrogen co-doped graphene(PNG)was developed via a two-step pyrolysis approach through the intermedium of g-C_(3)N_(4) template and glyphosate as the phosphorus source,and was used for the catalytic dehydrochlorination of 1,2-dichloroethane(EDC)to vinyl chloride monomer(VCM)*** characterization results indicate that a volcano relationship of surface area and surface properties with the usage of phosphorus precursor was observed,and the sample of PNG-900-6 possesses not only the thin film structure with enhanced surface area but also the smaller grain size of PNG ***,such PNGs show a great improvement of catalytic performance in the dehydrochlorination of EDC,and the PNG-900-6 catalyst behaves the best with a 4-times higher activity than that on the nitrogen doped graphene(NG).It was also proved that the synergetic effect of the unique P-C coordination on the graphene to generate more quaternary nitrogen species was crucial in determining the catalytic performance of EDC *** results demonstrate that the phosphorus and nitrogen co-doped graphene offers many advantages in physical structure and chemical property,and are also great potential on the catalytic application in the dehydrochlorination of 1,2-dichloroethane.

关键词： Catalysis Nanomaterials Fixed-bed dehydrochlorination Doped graphene

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dehydrochlorination of Poly vinyl chloride Catalyzed by Quarternary Ammonium Salts in Solid Phase

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Chemical Research in Chinese Universities 1992年第1期8卷 53-58页

作者： Fu Yujie, Xie Demin, Wang Rongshun, Wang Cunguo and Zhang Xiyan (Department of Chemistry, Northeast Normal University, Changchun)Wang Qiang (Centre of Analysis and Measurement, Northeast Normal University, Changchun)

The development of conducting polymers has been an active subject in the world since the late in 1970’s. The preparation of polyaeetylene-like polymers by dehydroehlorination of polyvinylchloride (PVC) is a very economical and useful procedure and,hence, a focus of enormous interest of both theoretieians and experimentalists. In recent years, many methods for dehydrochlorination of PVC in solution have been studied widely and many kinds of catalytic mechanisms have been suggested.

关键词： Poly (vinylchloride) Quarternary ammonium salt dehydrochlorination

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Nitrogen doped active carbon catalyzing dehydrochlorination of 1,2-dichloroethane into vinyl chloride

Nitrogen doped active carbon catalyzing dehydrochlorination ...

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第18届全国分子筛学术大会

作者： Zhenjin Zhang Zeyuan Kan Zhaobin Shen Hong Zhao Biao Jiang Shanghai Advanced Research Institute Chinese Academy of Sciences

The pyrolysis of 1,2-dichloroethane is the most popular commercialized way of production vinyl chloride,however it is plagued by the high energy consuming and the resulted coke *** extensive efforts have been made to explore an active,selective and stable catalyst working in much lower temperature and resulting in less coke upon *** we report a novel nitrogen-doped active carbon catalyst(AC-N)and its catalytic performance on the dehydrochlorination of 1,*** conversion of 1,2-dichloroethane on AC-N exceeds 100%and the selectivity of vinyl chloride is over 99%at a temperature of 300℃,EDC LHSV 0.313 *** tests reveal the good stable performance of AC-N over dehydrochlorination of 1,*** novel Nitrogen doped active carbon is a potential catalyst for the industrial dehydrochlorination of 1,2-dichloroethane into vinyl chloride

关键词： dehydrochlorination N-doped AC Vinyl chloride stability

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M/C_(3)N_(4)/AC(M=Au,Pt,Ru)‐catalyzed acetylene coupling with ethylene dichloride:How effective are the bifunctionalities?

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Chinese Journal of Catalysis 2022年第3期43卷 820-831页

作者： Qing Yu Shiyi Wang Mengru Wang Xiaoling Mou Ronghe Lin Yunjie Ding Hangzhou Institute of Advanced studies Zhejiang Normal UniversityHangzhou 311231ZhejiangChina Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina The State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Acetylene coupling with ethylene dichloride,which uses both coal and oil resources,is attractive for sustainable PVC ***,highly active and stable carbon nitride‐based catalysts were developed by a novel pre‐oxidation‐pyrolysis process,affording unprecedented dehydrochlorination activity with good *** best‐performing system was further modified with different precious metals(Au,Pt,and Ru)to promote the hydrochlorination chemistry between the in‐situ formed hydrogen chloride and acetylene co‐*** presence of metal centers intensifies the hydrochlorination activity but weakens the dehydrochlorination ability due to competitive adsorption between the two reactants at the metal *** coupling performance was achieved over C_(3)N_(4)/AC and single‐atom Au/C_(3)N_(4)/AC catalysts in cascade *** results strongly suggest that dehydrochlorination is an essential step in the coupling reaction,and the activation of acetylene and ethylene dichloride molecules requires different active sites that should be engineered in future work.

关键词： Acetylene hydrochlorination Bi‐functional catalyst dehydrochlorination Ethylene dichloride Vinyl chloride

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The Synthesis and Electronic Characteristics of Poly(p-Phenylene Vinylene) Derivatives

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Chinese Chemical Letters 1998年第1期9卷 75-77页

作者： Jian Ying WANG Yin Kui LI Wen Xiang HU Sheng Jian TAN Yong Fu LONG (The Centre of Research and Development of Medicine Pharmaceuticals Commission of Science & Technology and Industry for National Defence. Beijing 100101 Materials Engineering and Appl Ctr. R. and D. of Med. Pharmaceut. Commn. Sci./Technol./Indust. N.D. Beijing 100101 China Mat. Eng. and Applied Chemistry Natl. Univ. of Defence Technology Changsha 410073 China

A series of soluble poly(p-phenylene vinylene) (PPV) derivatives were synthesized through dehydrochlorination with the p-metaoxy phenol as starting materials. The electronic characteristics of PPV derivatives were stu... 详细信息

关键词： poly(p-phenylene vinylene) dehydrochlorination electronic characteristic

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Highly Selective Gas-phase Synthesis of 1,1-Dichloroethylene from 1,1,2-Trichloroethane over Supported Amine Catalysts

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Chemical Research in Chinese Universities 2015年第5期31卷 787-791页

作者： TANG Cen JIN Yanxia WANG Xiaoxia HU Gengshen XIE Guanqun LI Xiaonian LUO Mengfei Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University Jinhua 321004 P. R. China Industrial Catalysis Institute of Zhejiang University of Technology Hangzhou 310014 P. R. China

The manufacture of 1,1-dichloroethylene（1,1-DCE） usually employs liquid phase method to perform the dehydrochlorination of 1,1,2-trichloroethane（TCE）, where large amounts of high-concentration salty wastewater is produced inevitably. It has been a long-term goal to achieve the gas phase synthesis of 1,1-DCE via supported cata- lysts. In this work, the gas-phase synthesis of 1,1-DCE from TCE was studied in the presence of pentaethylenehexamine（PEHA） supported on silica. High and stable selectivity to 1,1-DCE（up to 98%） was obtained, which could be ascribed to the relatively strong basicity of PEHA according to a proposed E2 mechanism. The formation of PEHA chloride from the HCI generated in situ was detected and was considered to be the main reason for the deactivation of PEHA catalyst.

关键词： 1,1-Dichloroethene Supported amine catalyst dehydrochlorination

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The Synthesis of Soluble Copolymer of Poly(p-Phenylene Vinylene)

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Chinese Chemical Letters 1998年第1期9卷 79-81页

作者： Jian Ying WANG Yin Kui LI Wen Xiang HU Sheng Jian TAN Yong Fu LONG(The Centre of Research and Development of Medicine Pharmaceuticals, Commission of Science & Technology and industry for National Defence, Beijing 100101 Materials Science and Applied Ctr. R. and D. of Med. Pharmaceut. Commn. Sci./Technol./Indust. N.D. Beijing 100101 China Mat. Science and Applied Chemistry Natl. Univ. of Defence Technology Chańgsha 410073 China

Appling the dehydrochlorination reaction, the copolymerization of 1, 4-bis(chloromethyl)-2, 5-dimethyl benzene and 1, 4-bis(chloromethyl)-2-methoxy-5-hexyloxyl benzene was studied. The solubility of the copolymer was determined by the structure and molar ratio of two monomers. The structure of the copolymer was identified by UV, IR, and H-1 NMR analyses.

关键词： copolymerization monomer dehydrochlorination

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Eco-friendly Technologies for Physical and Chemical Recycling of PVC-Related Wasteful Resources

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Journal of Earth Science and Engineering 2016年第4期6卷 200-207页

作者： Hyoungsan Kye Sejong Han Jaemyung Han Sukwon Hong Donghyun Lee Jongwook Bae Department of Applied Chemical Engineering Mok Won University Daejeon 35349 Korea Sunjin Concrete Co. Ltd. Buyeo Chungnam 33175 Korea PPI Pyunghwa Co. Ltd. Hwaseong Kyunggi 185 74 Korea School of Chemical Engineering Sung Kyun Kwan University Suwon 16419 Korea

The aim of this study is to enhance the recycled PVC （polyvinyl chloride） related material property by formulation technology and develop the recycling product processing technology furthermore develop the chemical recycling technology for last stage of PVC wastes. The formulation technology is composed of pre-treatment （crushing, separation etc.） and post-treatment （material ratio, additives, stabilizer etc.） to enhance the recyclate property. The formulation for recycled PVC by application basis and processing technology is applied to produce the structural product for civil and construction application such as pipe fittings and water drainage cap for environmental waterway. Also chemical recycling technology for end life PVC scrap which causes environmental pollution by incineration or landfill is studied for producing hydrocarbon and hydrogen chloride for VCM.

关键词： Eco-friendly technology mechanical recycling chemical recycling dehydrochlorination

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