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epoxidation of propylene 2

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Impact of dimethyl ether on engine seal materials

WU Ning, ZHANG Wugao, HUANG Zhen

Frontiers in Energy 2008, Volume 2, Issue 3,   Pages 279-284 doi: 10.1007/s11708-008-0042-1

Abstract: The constitution of ethylene propylene terpolymer rubber (EPDM) has a major impact on its resistance

Keywords： impact     Common polyvinylchloride     different     constitution     ethylene propylene    

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rheological, phase morphologic, thermal and mechanical properties of poly(trimethylene terephthalate)/ethylenepropylene diene monomer copolymer grafted with maleic anhydride/metallocene polyethylene blends

RUN Mingtao, SONG Hongzan, WANG Yingjin, YAO Chenguang, GAO Jungang

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 3,   Pages 238-245 doi: 10.1007/s11705-007-0043-3

Abstract: properties of poly(trimethylene terephthalate)/metallocene polyethylene (PTT/mPE) blends in the presence of ethylenepropylene diene monomer copolymer grafted with maleic anhydride (EPDM--MAH) as compatibilizer are studied

Keywords： /metallocene polyethylene     presence     rheological     phenomena     trimethylene terephthalate    

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Catalysis of semihydrogenation of acetylene to ethylene: current trends, challenges, and outlook

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 7,   Pages 1031-1059 doi: 10.1007/s11705-021-2113-3

Abstract: Ethylene is an important feedstock for various industrial processes, particularly in the polymer industryUnfortunately, during naphtha cracking to produce ethylene, there are instances of acetylene presenceAn increase in the reaction temperature affords high acetylene conversion and ethylene selectivity toobtain reactant streams free of ethylene.Conflicting findings to this trend have reported the presence of ethylene in the feed stream.

Keywords： selectivity     hydrogenation     acetylene     ethylene     palladium    

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Alkylation of benzene with propylene catalyzed by FeCl3-chloropyridine ionic liquid

SUN Xuewen, ZHAO Suoqi, LI Hui

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 3,   Pages 292-295 doi: 10.1007/s11705-007-0053-1

Abstract: Alkylation of benzene with propylene was carried out with FeCl3-chloro-butyl-pyridine (FeCl-[bpc]) ionicSignificant improvements in propylene conversion and cumene selectivity under mild reaction conditionsUnder 20ºC, 0.1 MPa, reaction time 5 min, mole ratio of benzene to propylene 10:1 and mass ratio of FeCl-[bpc] to benzene 1:100, conversion of propylene can increase from 83.60% to 100.00% and selectivityAt the initial stage of the reaction, alkylation is the main reaction and a higher conversion of propylene
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Gas phase ethylene polymerization over SiO

Liuzhong LI, Aiyou HAO, Ruihua CHENG, Boping LIU

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 1,   Pages 89-95 doi: 10.1007/s11705-010-0558-x

Abstract: In this work, gas phase ethylene polymerization by S-2 catalysts (Cat-1, Cat-2, and Cat-3) was carried

Keywords： UCC S-2 catalyst     Al-alkyl co-catalyst     gas-phase ethylene polymerization     high density polyethylene    

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Polyethylene glycol-supported ionic liquid as a highly efficient catalyst for the synthesis of propylene

Rui YAO, Hua WANG, Jinyu HAN

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 3,   Pages 239-245 doi: 10.1007/s11705-012-1297-y

Abstract: The coupling reaction of propylene and CO to form propylene carbonate (PC) was promoted by an ionic

Keywords： ionic liquid     PEG-supported ionic liquid     carbon dioxide     propylene carbonate    

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Effect of triethylamine treatment of titanium silicalite-1 on propylene epoxidation

Juan XU,Yaquan WANG,Wenping FENG,Yi LIN,Shuhai WANG

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 4,   Pages 478-487 doi: 10.1007/s11705-014-1453-7

Abstract: The modified TS-1 samples improved in varying degrees the catalyst life for the epoxidation of propylene

Keywords： titanium silicalite-1     triethylamine     hollow cavity     epoxidation of propylene     catalyst life    

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Methanol to propylene: the effect of iridium and iron incorporation on the HZSM-5 catalyst

Alireza MOHAMMADREZAEI, Sadegh PAPARI, Mousa ASADI, Abas NADERIFAR, Reza GOLHOSSEINI

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 3,   Pages 253-258 doi: 10.1007/s11705-012-0902-4

Abstract: The effect of iridium and iron impregnation of HZSM-5 zeolite on the methanol to propylene reaction (The selectivities of propylene and other hydrocarbons, and the conversion of methanol were compared byThe results indicate that HZSM-5 zeolite modified by iron and iridium increased propylene selectivityThe selectivity of propylene was higher for Ir/H-ZSM-5 than for Fe/H-ZSM-5, where Fe/H-ZSM-5 was more

Keywords： HZSM-5     promoter     iridium     iron     MTP    

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Synthesis of magnetic Pb/Fe

Hualiang AN, Xinqiang ZHAO, Zhiguang JIA, Changcheng WU, Yanji WANG

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 2,   Pages 215-218 doi: 10.1007/s11705-009-0055-2

Abstract: adsorption-desorption, and their catalytic activity was investigated in the reaction for synthesizing propylenecarbonate from urea and 1,2-propylene glycol.reaction time of 2 h, catalyst percentage of 1.7 wt-% and a molar ratio of urea to PG of 1∶4, the yield of propylene

Keywords： Pb/Fe3O4/SiO2 magnetic particle     urea     1     2-propylene glycol     propylene    

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Application of Radiation Techniques inthe Field of Materials Science

Fu Yibei,Xu Yunshu,Huang Wei,Xiong Liangping,Gao Xiaoling,Xiong Jie

Strategic Study of CAE 2008, Volume 10, Issue 1,   Pages 12-22

Abstract: as synthesis of silicon carbide ceramic fibers by irradiating in a nuclear reactor, preparation of ethylenepropylene diene terpolymer sealing materials by radiation crosslinking and synthesis of amidoxime chelating

Keywords： radiation techniques     materials science     silicon carbide ceramic fiber     ethylene propylene diene terpolymer    

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Optimization and simultaneous heat integration design of a coal-based ethylene glycol refining process

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 9,   Pages 1280-1288 doi: 10.1007/s11705-023-2301-4

Abstract: Coal to ethylene glycol still lacks algorithm optimization achievements for distillation sequencing duein this paper into the simultaneous optimization of parameters and heat integration of the coal to ethyleneThis study discloses the unexpected great energy-saving potential for the coal to ethylene glycol process

Keywords： ethylene glycol     redistribution     heat integration     optimization     parallel framework    

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Thermodynamic analysis of ethanol synthesis from hydration of ethylene coupled with a sequential reaction

Jie Gao, Zhikai Li, Mei Dong, Weibin Fan, Jianguo Wang

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 5,   Pages 847-856 doi: 10.1007/s11705-019-1848-6

Abstract: Coal-based ethanol production by hydration of ethylene is limited by the low equilibrium ethylene conversionTo improve ethylene conversion, coupling hydration of ethylene with a potential ethanol consumption reactionThe results show that dehydrogenation of ethanol to acetaldehyde has little effect on ethylene conversion, whereas for dehydrogenation of ethanol to acetaldehyde and ethyl acetate, ethylene conversion can beThe esterification of acetic acid with ethanol can greatly enhance the ethylene conversion to 22.5%;

Keywords： ethylene     ethanol     thermodynamics     coupling    

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Poly(vinylidene fluoride--hexafluoro propylene) membranes prepared via thermally induced phase separation

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 5,   Pages 720-730 doi: 10.1007/s11705-021-2098-y

Abstract: A non-toxic and environmentally safe diluent, acetyl tributyl citrate, was employed to prepare poly(vinylidene fluoride)-co-hexafluoropropylene membranes via thermally induced phase separation. Effects of the polymer concentration on the phase diagram, membrane morphology, hydrophobicity, pore size, porosity and mechanical properties (tensile stress and elongation at break) were investigated. The results showed that the pore size and porosity tended to decrease with increasing polymer concentration, whereas the contact angle, liquid entry pressure and mechanical properties showed the opposite trend. In direct contact membrane distillation operation with 3.5 wt-% sodium chloride solution as the feed solution, the prepared membranes performed high salt rejection (>99.9%). Furthermore, the prepared membranes retained excellent performance in long-term stability tests regarding the permeate flux and salt rejection.

Keywords： poly(vinylidene fluoride)-co-hexafluoropropylene     thermally induced phase separation     non-toxic diluent     direct contact membrane distillation    

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Cerebration and Practice of Expanded feedstock sources for Ethylene units

Cao Xianghong

Strategic Study of CAE 2001, Volume 3, Issue 5,   Pages 35-43

Abstract:

This article starts with the research results that the performance of the ethylene production fromis the by-product of the de-waxing of the vacuum second and third cuts, can be used as feedstock for ethyleneIt proves that the feedstock ensures high ethylene yield and longer service lfie of cracker, thus is

Keywords： ethylene     feedstock     sources    

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Uncovering the effect of poly(ethylene-co-vinyl alcohol) molecular weight and vinyl alcohol content on

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1484-1502 doi: 10.1007/s11705-023-2331-y

Abstract: Various hydrophilic poly(ethylene-co-vinyl alcohol) (EVOH) were used herein to precisely control the

Keywords： polysulfone     blend modification     ultrafiltration membrane     formation hydrodynamics     poly(ethylene-co-vinyl    

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Title Author Date Type Operation

Impact of dimethyl ether on engine seal materials

WU Ning, ZHANG Wugao, HUANG Zhen

Journal Article

rheological, phase morphologic, thermal and mechanical properties of poly(trimethylene terephthalate)/ethylenepropylene diene monomer copolymer grafted with maleic anhydride/metallocene polyethylene blends

RUN Mingtao, SONG Hongzan, WANG Yingjin, YAO Chenguang, GAO Jungang

Journal Article

Catalysis of semihydrogenation of acetylene to ethylene: current trends, challenges, and outlook

Journal Article

Alkylation of benzene with propylene catalyzed by FeCl3-chloropyridine ionic liquid

SUN Xuewen, ZHAO Suoqi, LI Hui

Journal Article

Gas phase ethylene polymerization over SiO

Liuzhong LI, Aiyou HAO, Ruihua CHENG, Boping LIU

Journal Article

Polyethylene glycol-supported ionic liquid as a highly efficient catalyst for the synthesis of propylene

Rui YAO, Hua WANG, Jinyu HAN

Journal Article

Effect of triethylamine treatment of titanium silicalite-1 on propylene epoxidation

Juan XU,Yaquan WANG,Wenping FENG,Yi LIN,Shuhai WANG

Journal Article

Methanol to propylene: the effect of iridium and iron incorporation on the HZSM-5 catalyst

Alireza MOHAMMADREZAEI, Sadegh PAPARI, Mousa ASADI, Abas NADERIFAR, Reza GOLHOSSEINI

Journal Article

Synthesis of magnetic Pb/Fe

Hualiang AN, Xinqiang ZHAO, Zhiguang JIA, Changcheng WU, Yanji WANG

Journal Article

Application of Radiation Techniques inthe Field of Materials Science

Fu Yibei,Xu Yunshu,Huang Wei,Xiong Liangping,Gao Xiaoling,Xiong Jie

Journal Article

Optimization and simultaneous heat integration design of a coal-based ethylene glycol refining process

Journal Article

Thermodynamic analysis of ethanol synthesis from hydration of ethylene coupled with a sequential reaction

Jie Gao, Zhikai Li, Mei Dong, Weibin Fan, Jianguo Wang

Journal Article

Poly(vinylidene fluoride--hexafluoro propylene) membranes prepared via thermally induced phase separation

Journal Article

Cerebration and Practice of Expanded feedstock sources for Ethylene units

Cao Xianghong

Journal Article

Uncovering the effect of poly(ethylene-co-vinyl alcohol) molecular weight and vinyl alcohol content on

Journal Article