BDO, eo hape e tsejoang e le 1,4-butanediol, ke ntho ea bohlokoa ea motheo ea tlhaho le e ntle ea lik'hemik'hale tse tala. BDO e ka lokisoa ka mokhoa oa acetylene aldehyde, mokhoa oa maleic anhydride, mokhoa oa joala oa propylene, le mokhoa oa butadiene. Mokhoa oa acetylene aldehyde ke mokhoa o ka sehloohong oa indasteri oa ho lokisa BDO ka lebaka la litšenyehelo tsa eona le melemo ea ts'ebetso. Acetylene le formaldehyde li qala ho koaheloa ho hlahisa 1,4-butynediol (BYD), e leng ho feta hydrogenated ho fumana BDO.
Tlas'a khatello e phahameng (13.8 ~ 27.6 MPa) le maemo a 250 ~ 350 ℃, acetylene e arabela ka formaldehyde ka pel'a catalyst (hangata cuprous acetylene le bismuth holim'a tšehetso ea silica), 'me joale 1,4-butynediol e bohareng ke hydrogenated. ho ea BDO ho sebelisa Raney nickel catalyst. Tšobotsi ea mokhoa oa khale ke hore motsoako le sehlahisoa ha se hloke ho arohana, 'me litšenyehelo tsa ho sebetsa li tlaase. Leha ho le joalo, acetylene e na le khatello e phahameng ea karolo e itseng le kotsi ea ho phatloha. Ntho ea polokeho ea moralo oa li-reactor e phahame ka makhetlo a 12-20, 'me thepa e kholo ebile e theko e boima, e bakang matsete a phahameng; Acetylene e tla etsa polymerize ho hlahisa polyacetylene, e koalang catalyst le ho thibela liphaephe, e leng se bakang potoloho e khuts'oane ea tlhahiso le tlhahiso e fokotsehileng.
E le ho arabela mefokolo le mefokolo ea mekhoa ea setso, lisebelisoa tsa ho itšoara le li-catalysts tsa mokhoa oa ho itšoara li ile tsa ntlafatsoa ho fokotsa khatello ea karolo ea acetylene tsamaisong ea karabelo. Mokhoa ona o 'nile oa sebelisoa haholo ka hare ho naha le linaheng tse ling. Ka nako e ts'oanang, motsoako oa BYD o etsoa ho sebelisoa bethe ea sludge kapa bethe e emisitsoeng. Mokhoa oa acetylene aldehyde BYD hydrogenation o hlahisa BDO, 'me hajoale mekhoa ea ISP le INVISTA ke eona e sebelisoang ka ho fetisisa Chaena.
① Synthesis ea butynediol ho tloha acetylene le formaldehyde ho sebelisa copper carbonate catalyst
E sebelisoa karolong ea lik'hemik'hale ea acetylene ea ts'ebetso ea BDO ho INVIDIA, formaldehyde e sebetsana le acetylene ho hlahisa 1,4-butynediol tlas'a ketso ea copper carbonate catalyst. Mocheso oa karabelo ke 83-94 ℃, 'me khatello ke 25-40 kPa. The catalyst e na le ponahalo ea phofo e tala.
② Catalyst bakeng sa hydrogenation ea butynediol ho BDO
Karolo ea hydrogenation ea ts'ebetso e na le li-reactors tse peli tse phahameng tsa khatello e phahameng tse kopantsoeng letotong, tse nang le 99% ea liketso tsa hydrogenation tse phethiloeng ka mochine oa pele. Li-catalyst tsa pele le tsa bobeli tsa hydrogenation ke li-alloys tsa nickel aluminium tse kentsoeng.
Bethe e tsitsitseng Renee nickel ke nickel aluminium alloy block e nang le boholo ba likaroloana ho tloha ho 2-10mm, matla a phahameng, khanyetso e ntle ea ho apara, sebaka se seholo se khethehileng sa holim'a metsi, botsitso bo betere, le bophelo bo bolelele ba tšebeletso.
Unactivated fixed bed Raney nickel particles ba bohlooho bo bosoeu, 'me ka mor'a hore ho be le mokelikeli o itseng oa alkali leaching, ba fetoha likaroloana tse ntšo kapa tse ntšo tse bohlooho, tse sebelisoang haholo-holo ho li-reactors tse tsitsitseng betheng.
① Copper e ts'ehelitsoeng e thusa ho qaptjoa ha butynediol ho tloha acetylene le formaldehyde
Tlas'a ts'ebetso ea copper bismuth catalyst, formaldehyde e sebetsana le acetylene ho hlahisa 1,4-butynediol, ka mocheso o arabelang oa 92-100 ℃ le khatello ea 85-106 kPa. The catalyst e hlaha e le phofo e ntšo.
② Catalyst bakeng sa hydrogenation ea butynediol ho BDO
Ts'ebetso ea ISP e nka mekhahlelo e 'meli ea hydrogenation. Mokhahlelo oa pele ke ho sebelisa phofshoana ea nickel aluminium alloy e le mohloli, 'me hydrogenation ea khatello e tlaase e fetola BYD ho BED le BDO. Ka mor'a karohano, mohato oa bobeli ke khatello e phahameng ea hydrogenation e sebelisang nickel e imetsoeng e le mokhoa oa ho fetola BED hore e be BDO.
Ntho ea mantlha ea hydrogenation catalyst: phofo ea Raney nickel catalyst
Ntho ea mantlha ea hydrogenation catalyst: Powder Raney nickel catalyst. Sehlahisoa sena se sebelisoa haholo-holo karolong e tlaase ea khatello ea hydrogenation ea ts'ebetso ea ISP, bakeng sa ho lokisetsa lihlahisoa tsa BDO. E na le litšoaneleho tsa ts'ebetso e phahameng, khetho e ntle, sekhahla sa ho sokoloha, le lebelo la ho rarolla kapele. Lintho tse ka sehloohong ke nickel, aluminium le molybdenum.
Ntho ea mantlha ea hydrogenation catalyst: phofo nickel aluminium alloy hydrogenation catalyst
Sehlahisoa se hloka ts'ebetso e phahameng, matla a phahameng, tekanyo e phahameng ea phetoho ea 1,4-butynediol, le lihlahisoa tse fokolang tse fokolang.
Ntho ea bobeli ea hydrogenation catalyst
Ke sesebelisoa se tšehelitsoeng se nang le alumina e le sejari le nickel le koporo e le likarolo tse sebetsang. Boemo bo fokotsehileng bo bolokiloe ka metsing. The Catalyst e na le matla a phahameng a mochine, tahlehelo e fokolang ea likhohlano, botsitso bo botle ba lik'hemik'hale, 'me ho bonolo ho e kenya. Likaroloana tse nang le sebopeho sa clover e ntšo ka chebahalo.
Linyeoe tsa Kopo tsa Catalysts
E sebelisoa bakeng sa BYD ho hlahisa BDO ka catalyst hydrogenation, e sebelisoang ho yuniti ea BDO ea lithane tse 100000. Lihlopha tse peli tsa li-reactors tse tsitsitseng tsa bethe li sebetsa ka nako e le 'ngoe, e' ngoe ke JHG-20308, 'me e' ngoe e tsoa linaheng tse ling.
Ho hlahloba: Nakong ea ho hlahlojoa ha phofo e ntle, ho ile ha fumanoa hore JHG-20308 ea bethe e tsitsitseng e hlahisa phofo e nyenyane ho feta e tsoang linaheng tse ling.
Ts'ebetso: Qetello ea Ts'ebetso ea Catalyst: Maemo a ts'ebetso ea li-catalyst tse peli a tšoana. Ho tsoa ho data, sekhahla sa dealumination, phapano ea mocheso o kenang le oa ho tsoa, le ts'ebetso ea ho ts'oaroa ha mocheso oa alloy mohatong ka mong oa ts'ebetso li ts'oana haholo.
Mocheso: Thempereichara ea karabelo ea JHG-20308 catalyst ha e fapane haholo le ea catalyst e tsoang kantle ho naha, empa ho latela lintlha tsa tekanyo ea mocheso, JHG-20308 catalyst e na le ts'ebetso e betere ho feta e tsoang kantle ho naha.
Litšila: Ho tsoa boitsebisong ba ho lemoha BDO tharollo e sa tsoakoang qalong ea karabelo, JHG-20308 e na le litšila tse fokolang hanyenyane sehlahisoa se felileng ha se bapisoa le li-catalyst tse tsoang linaheng tse ling, haholo-holo tse bontšitsoeng ka har'a n-butanol le HBA.
Ka kakaretso, ts'ebetso ea ts'ebetso ea JHG-20308 e tsitsitse, ha e na lihlahisoa tse phahameng tse hlakileng, 'me ts'ebetso ea eona e hlile e tšoana kapa e betere ho feta ea li-catalyst tse tsoang linaheng tse ling.
Ts'ebetso ea tlhahiso ea bethe e tsitsitseng ea nickel aluminium catalyst
(1) Ho qhibiliha: Alloy ea nickel aluminium e qhibilihisoa mocheso o phahameng ebe e etsoa sebopeho.
(2) Ho senya: Li-blocks tsa alloy li pshatleha ka likaroloana tse nyenyane ka thepa ea ho senya.
(3) Ho hlahloba: Ho hlahloba likaroloana tse nang le boholo bo tšoanelehang.
(4) Ts'ebetso: Laola sekhahla se itseng sa mahloriso le sekhahla sa phallo ea alkali ea mokelikeli ho kenya likaroloana tse tora ea karabelo.
(5) Lits'oants'o tsa tlhahlobo: dikahare tsa tšepe, kabo ea boholo ba likaroloana, matla a khatello ea khatello, boima ba bongata, jj.
Nako ea poso: Sep-11-2023
