isibhengezo_sekhasi

Imikhiqizo

Isebenza ngokukhethekile ekukhiqizeni utshwala be-propargyl, i-1,4 butynediol kanye ne-3-chloropropyne

Ukukhiqizwa kwe-1, 4-butanediol (BDO) ngendlela ye-maleic anhydride

Incazelo emfushane:

Kunezinqubo ezimbili eziyinhloko zokukhiqizwa kwe-BDO nge-anhydride ye-maleic.Enye inqubo ye-hydrogenation eqondile ye-maleic anhydride eyakhiwe yi-Mitsubishi Petrochemical and Mitsubishi Chemical e-Japan ngeminyaka yawo-1970, ebonakala ngokukhiqizwa ngesikhathi esisodwa kwe-BDO, THF kanye ne-GBL ohlelweni lwe-hydrogenation lwe-maleic anhydride.Imikhiqizo yezingoma ezihlukene ingatholakala ngokulungisa izimo zenqubo.Enye inqubo ye-gas esterification hydrogenation ye-maleic anhydride eyakhiwe yi-UCC Company kanye ne-Davey Process Technology Company e-United Kingdom, ethuthukiswe kusukela kubuchwepheshe obuphansi be-carbonyl synthesis.Ngo-1988, ukuhlolwa kabusha kokugeleza kwenqubo kwaqedwa futhi nomklamo wezimboni wahlongozwa.Ngo-1989, UBUCHWEPHESHE BATHUNYELWA E-DongSANG CHEMICAL COMPANY YASE-Korea KANYE NE-DONGGU CHEMICAL Company yase-Japan UKUZE KWAKHIWE I-20,000-TON/year 1, 4-BUtanEDIOL INDUSTRIAL Production PLANT.


Imininingwane Yomkhiqizo

Omaka bomkhiqizo

Inqubo ye-esterification kanye ne-hydrogenation ye-maleic anhydride yathuthukiswa yi-Davy Mckee Company e-United Kingdom.Iqukethe izinyathelo ezintathu: (1) ukusabela phakathi kwe-maleic anhydride ne-ethanol;② I-BDO yalungiswa nge-hydrolysis ye-diethyl maleic acid;③ Ukuhlukaniswa nokucwengwa kwemikhiqizo yokusabela.Isilinganiso se-BDO, GBL ne-THF singashintshwa ngokulungisa izimo zenqubo.Ngenxa yenzuzo yezindleko zokukhiqizwa kwe-BDO, amathuluzi amaningi amasha akhiwe yile nqubo eminyakeni yamuva, futhi okuwumkhuba oyinhloko wokuthuthukiswa kwenqubo yokukhiqiza ye-BDO.Impendulo esuka ku Esterification:

Ukukhiqizwa kwe-1, 4-butanediol (BDO) ngendlela ye-maleic anhydride 2

Ukusabela kwe-Hydrogenation

Ukukhiqizwa kwe-1, 4-butanediol (BDO) ngendlela ye-maleic anhydride 3

Njengamanje, kukhona nezinqubo ze-n-butane-maleic anhydride, eziqala ukucutshungulwa yi-oxidation yesigaba segesi se-n-butane ukuze kukhiqizwe i-anhydride ye-maleic, bese i-anhydride yesilisa ifakwa esterfied nge-methanol ukukhiqiza i-dimethyl maleate.Ukuguqulwa kwe-anhydride yesilisa kungafinyelela ku-100% ngaphansi kwe-catalyst efanele.Ekugcineni, i-BDO ikhiqizwa yi-hydrogenation kanye ne-hydrolysis ye-maleic anhydride catalyst.Izinzuzo zale nqubo ukuthi kulula ukuhlukanisa ukungcola okufana ne-methanol namanzi ngemva kokufakwa kwe-esterification, futhi izindleko zokuhlukanisa ziphansi.Ngaphezu kwalokho, ukuntengantenga kwe-dimethyl maleate kuyanda, okwenza ububanzi bokusebenza kwesigaba segesi se-hydrogenation banzi, futhi izinga lokuguqulwa kwe-methanol esterification lingaphezu kwama-99.7%.Ngakho-ke, ayikho inkinga yokuqala yokuhlanza i-diethyl maleate.Ngakho-ke, akudingekile ukuphinda kusetshenziswe kabusha yonke i-anhydride ye-maleic engaphenduliwe kanye ne-mono-methyl ester, kodwa i-methanol ehlanzekile kuphela, eyenza inqubo yokukhiqiza ibe lula futhi inciphise kakhulu ukutshalwa kwezimali okuphelele kwephrojekthi uma kuqhathaniswa nobuchwepheshe bangaphambilini.


  • Okwedlule:
  • Olandelayo:

  • Bhala umyalezo wakho lapha futhi usithumelele wona