Kev tsim tawm ntawm 1, 4-butanediol (BDO) los ntawm txoj kev maleic anhydride Featured duab

Kev tsim tawm ntawm 1, 4-butanediol (BDO) los ntawm txoj kev txiv neej anhydride

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Muaj ob txoj hauv kev tseem ceeb rau kev tsim BDO los ntawm maleic anhydride.Ib qho yog cov txheej txheem hydrogenation ncaj qha ntawm cov txiv neej anhydride tsim los ntawm Mitsubishi Petrochemical thiab Mitsubishi Chemical hauv Nyij Pooj xyoo 1970s, uas yog tus cwj pwm los ntawm kev tsim ib txhij ntawm BDO, THF thiab GBL hauv cov txheej txheem hydrogenation ntawm maleic anhydride.Cov khoom ntawm cov khoom sib txawv tuaj yeem tau txais los ntawm kev kho cov txheej txheem txheej txheem.Lwm qhov yog cov roj esterification hydrogenation txheej txheem ntawm maleic anhydride tsim los ntawm UCC tuam txhab thiab Davey Process Technology tuam txhab nyob rau hauv lub tebchaws United Kingdom, uas yog tsim los ntawm tsis tshua muaj siab carbonyl synthesis technology.Nyob rau hauv 1988, qhov rov ntsuam xyuas ntawm cov txheej txheem ntws tau tiav thiab kev tsim qauv tsim tau npaj.Xyoo 1989, TECHNOLOGY tau hloov mus rau DongSANG CHEMICAL COMPANY ntawm Kaus Lim Kauslim thiab DONGGU CHEMICAL Company ntawm Nyij Pooj los tsim 20,000-TON / xyoo 1, 4-BUtanEDIOL INDUSTRIAL ntau lawm cog.

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Cov txheej txheem ntawm esterification thiab hydrogenation ntawm maleic anhydride yog tsim los ntawm Davy Mckee Company hauv tebchaws United Kingdom.Nws muaj peb kauj ruam: (1) cov tshuaj tiv thaiv ntawm maleic anhydride thiab ethanol;② BDO tau npaj los ntawm hydrolysis ntawm diethyl maleic acid;③ Sib cais thiab ua kom zoo ntawm cov khoom siv tshuaj tiv thaiv.Qhov piv ntawm BDO, GBL thiab THF tuaj yeem hloov pauv los ntawm kev kho cov txheej txheem txheej txheem.Vim yog tus nqi kom zoo dua ntawm BDO ntau lawm, ntau yam khoom siv tshiab tau tsim los ntawm cov txheej txheem no nyob rau xyoo tas los no, uas tseem yog qhov tseem ceeb ntawm txoj kev loj hlob ntawm BDO txheej txheem ntau lawm.Cov tshuaj tiv thaiv Esterification:

Kev tsim tawm ntawm 1, 4-butanediol (BDO) los ntawm txoj kev txiv neej anhydride 2

Hydrogenation tshuaj tiv thaiv

Kev tsim tawm ntawm 1, 4-butanediol (BDO) los ntawm txoj kev txiv neej anhydride 3

Tam sim no, tseem muaj cov txheej txheem n-butane-maleic anhydride, uas yog thawj zaug catalyzed los ntawm cov roj theem oxidation ntawm n-butane los tsim cov txiv neej anhydride, thiab tom qab ntawd cov txiv neej anhydride yog esterfied nrog methanol los tsim dimethyl maleate.Kev hloov pauv ntawm maleic anhydride tuaj yeem ncav cuag 100% raws li qhov tsim nyog catalyst.Thaum kawg, BDO yog tsim los ntawm hydrogenation thiab hydrolysis ntawm maleic anhydride catalyst.Qhov zoo ntawm cov txheej txheem no yog tias nws yooj yim cais cov impurities xws li methanol thiab dej tom qab esterification, thiab tus nqi sib cais yog qis dua.Ntxiv mus, lub volatility ntawm dimethyl maleate yog nce, uas ua rau lub lag luam ntau yam ntawm cov roj theem hydrogenation theem wider, thiab lub conversion tus nqi ntawm methanol esterification yog siab dua 99.7%.Yog li ntawd, tsis muaj qhov pib ua kom huv si ntawm diethyl maleate.Yog li ntawd, nws tsis yog yuav tsum tau rov ua dua tag nrho cov unreacted maleic anhydride thiab mono-methyl ester, tab sis tsuas yog cov ntshiab methanol, uas yooj yim rau cov txheej txheem ntau lawm thiab zoo heev txo tag nrho cov peev ntawm qhov project piv nrog rau yav dhau los technology.

Yav dhau los: 1,4-butanediol (BDO) thiab nws cov kev npaj ntawm biodegradable yas PBAT

Tom ntej: 1, 4-butanediol zog

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