Tlhahiso ea 1, 4-butanediol (BDO) ka mokhoa oa maleic anhydride

Tlhaloso e Khutšoanyane:

Ho na le mekhoa e 'meli ea mantlha ea tlhahiso ea BDO ka maleic anhydride.E 'ngoe ke ts'ebetso e tobileng ea hydrogenation ea maleic anhydride e entsoeng ke Mitsubishi Petrochemical le Mitsubishi Chemical ea Japane lilemong tsa bo-1970, e khetholloang ka tlhahiso ea nako e le 'ngoe ea BDO, THF le GBL ts'ebetsong ea hydrogenation ea maleic anhydride.Lihlahisoa tsa lihlopha tse fapaneng li ka fumanoa ka ho fetola maemo a ts'ebetso.E 'ngoe ke ts'ebetso ea gas esterification hydrogenation ea maleic anhydride e ntlafalitsoeng ke UCC Company le Davey Process Technology Company naheng ea United Kingdom, e ntlafalitsoeng ho tsoa ho thekenoloji ea khatello e tlase ea carbonyl synthesis.Ka 1988, tlhahlobo e ncha ea phallo ea ts'ebetso e ile ea phethoa mme moralo oa indasteri o ile oa sisinngoa.Ka 1989, THEKNOLOJI E FETOTSE HO FINYELELETSOA HO DongSANG CHEMICAL COMPANY OF Korea LE DONGGU CHEMICAL Company OF Japan HO AHA 20,000-TON/year 1, 4-BUtanEDIOL INDUSTRIAL production PLANT.

Re romelle lengolo-tsoibila

Lintlha tsa Sehlahisoa

Li-tag tsa Sehlahisoa

Ts'ebetso ea esterification le hydrogenation ea maleic anhydride e entsoe ke Davy Mckee Company United Kingdom.E na le mehato e meraro: (1) karabelo pakeng tsa maleic anhydride le ethanol;② BDO e entsoe ka hydrolysis ea diethyl maleic acid;③ Karohano le ntlafatso ea lihlahisoa tsa karabelo.Karolelano ea BDO, GBL le THF e ka fetoloa ka ho fetola maemo a ts'ebetso.Ka lebaka la melemo ea litšenyehelo tsa tlhahiso ea BDO, lisebelisoa tse ngata tse ncha li hahiloe ke ts'ebetso ena lilemong tsa morao tjena, e leng mokhoa o ka sehloohong oa nts'etsopele ea ts'ebetso ea tlhahiso ea BDO.Maikutlo a Esterification:

Tlhahiso ea 1, 4-butanediol (BDO) ka mokhoa oa maleic anhydride 2

Hydrogenation reaction

Tlhahiso ea 1, 4-butanediol (BDO) ka mokhoa oa maleic anhydride 3

Hona joale, ho boetse ho na le mekhoa ea n-butane-maleic anhydride, eo pele e hlahisoang ke khase ea khase ea n-butane ho hlahisa anhydride ea maleic, ebe anhydride ea maleic e esterfied ka methanol ho hlahisa dimethyl maleate.Phetoho ea anhydride ea maleic e ka fihla ho 100% tlasa ts'ebetso e nepahetseng.Qetellong, BDO e hlahisoa ke hydrogenation le hydrolysis ea maleic anhydride catalyst.Melemo ea ts'ebetso ena ke hore ho bonolo ho arola litšila tse kang methanol le metsi ka mor'a esterification, 'me litšenyehelo tsa karohano li tlaase.Ho feta moo, ho hloka botsitso ha dimethyl maleate hoa eketseha, e leng se etsang hore sebaka sa ts'ebetso ea khase ea hydrogenation e be bophara, 'me sekhahla sa phetoho ea methanol esterification se ka holimo ho 99.7%.Ka hona, ha ho na bothata ba pele ba tlhoekiso ea diethyl maleate.Ka hona, ha ho hlokahale hore ho sebelisoe hape li-anhydride tsohle tse sa sebetseng tsa maleic le mono-methyl ester, empa ke methanol e hloekileng feela, e nolofatsang ts'ebetso ea tlhahiso le ho fokotsa haholo matsete a morero ha a bapisoa le theknoloji e fetileng.

E fetileng: 1,4-butanediol (BDO) le tokiso ea eona ea PBAT ea polasetiki e ka senyehang

E 'ngoe: 1, 4-butanediol thepa

Ngola molaetsa wa hao mona mme o re romele wona