BDO, tseem hu ua 1,4-butanediol, yog ib qho tseem ceeb ntawm cov organic thiab cov tshuaj lom neeg zoo. BDO tuaj yeem npaj tau los ntawm txoj kev acetylene aldehyde, txoj kev maleic anhydride, txoj kev propylene cawv, thiab txoj kev butadiene. Txoj kev acetylene aldehyde yog txoj kev lag luam tseem ceeb rau kev npaj BDO vim nws cov nqi thiab cov txiaj ntsig ntawm cov txheej txheem. Acetylene thiab formaldehyde yog thawj zaug condensed los tsim 1,4-butynediol (BYD), uas yog hydrogenated ntxiv kom tau txais BDO.
Nyob rau hauv qhov siab siab (13.8 ~ 27.6 MPa) thiab cov xwm txheej ntawm 250 ~ 350 ℃, acetylene reacts nrog formaldehyde nyob rau hauv lub xub ntiag ntawm ib tug catalyst (feem ntau cuprous acetylene thiab bismuth ntawm ib tug silica txhawb nqa), thiab tom qab ntawd lub nruab nrab 1,4-butynediol yog hydrogenated rau BDO siv ib tug Raney nickel catalyst. Lub yam ntxwv ntawm cov classical txoj kev yog tias lub catalyst thiab cov khoom tsis tas yuav tsum tau sib cais, thiab cov nqi khiav lag luam yog qis. Txawm li cas los xij, acetylene muaj ib feem siab siab siab thiab muaj kev pheej hmoo ntawm kev tawg. Qhov kev nyab xeeb ntawm lub reactor tsim yog siab li 12-20 zaug, thiab cov khoom siv yog loj thiab kim, ua rau muaj kev nqis peev siab; Acetylene yuav polymerize los tsim polyacetylene, uas deactivates lub catalyst thiab thaiv cov kav dej, ua rau lub voj voog ntau lawm luv luv thiab txo cov zis.
Txhawm rau teb rau qhov tsis txaus thiab qhov tsis txaus ntawm cov txheej txheem ib txwm muaj, cov khoom siv tshuaj tiv thaiv thiab cov catalysts ntawm lub kaw lus tshuaj tiv thaiv tau raug kho kom zoo dua los txo qhov siab ib nrab ntawm acetylene hauv lub kaw lus tshuaj tiv thaiv. Txoj kev no tau siv dav hauv tsev thiab thoob ntiaj teb. Tib lub sijhawm, kev tsim cov BYD yog ua tiav siv lub txaj sludge lossis lub txaj dai. Txoj kev acetylene aldehyde BYD hydrogenation tsim BDO, thiab tam sim no cov txheej txheem ISP thiab INVISTA yog cov siv dav tshaj plaws hauv Suav teb.
① Kev tsim cov butynediol los ntawm acetylene thiab formaldehyde siv cov catalyst tooj liab carbonate
Siv rau hauv seem tshuaj acetylene ntawm BDO txheej txheem hauv INVIDIA, formaldehyde reacts nrog acetylene los tsim 1,4-butynediol nyob rau hauv qhov kev ua ntawm cov catalyst tooj liab carbonate. Qhov kub ntawm cov tshuaj tiv thaiv yog 83-94 ℃, thiab qhov siab yog 25-40 kPa. Cov catalyst muaj cov hmoov ntsuab zoo li.
② Catalyst rau hydrogenation ntawm butynediol rau BDO
Qhov seem hydrogenation ntawm cov txheej txheem muaj ob lub tshuab hluav taws xob siab ruaj khov txuas ua ke, nrog 99% ntawm cov tshuaj tiv thaiv hydrogenation ua tiav hauv thawj lub tshuab hluav taws xob. Cov catalysts hydrogenation thawj thiab thib ob yog cov hlau nickel txhuas ua haujlwm.
Lub txaj ruaj khov Renee nickel yog lub thaiv nickel txhuas alloy nrog cov khoom me me xws li 2-10 hli, muaj zog siab, tiv taus kev hnav zoo, thaj chaw loj, ruaj khov catalyst zoo dua, thiab lub neej ua haujlwm ntev.
Cov khoom me me Raney nickel uas tsis tau ua haujlwm yog xim greyish dawb, thiab tom qab qee qhov kev sib xyaw ua ke ntawm cov kua alkali leaching, lawv dhau los ua cov khoom me me dub lossis xim grey dub, feem ntau yog siv rau hauv cov reactors txaj ruaj khov.
① Tooj liab txhawb nqa catalyst rau kev tsim cov butynediol los ntawm acetylene thiab formaldehyde
Nyob rau hauv qhov kev ua ntawm ib qho kev txhawb nqa tooj liab bismuth catalyst, formaldehyde reacts nrog acetylene los tsim 1,4-butynediol, ntawm qhov kub ntawm 92-100 ℃ thiab qhov siab ntawm 85-106 kPa. Cov catalyst tshwm sim ua hmoov dub.
② Catalyst rau hydrogenation ntawm butynediol rau BDO
Cov txheej txheem ISP siv ob theem ntawm hydrogenation. Theem thawj zaug yog siv cov hmoov nickel txhuas alloy ua catalyst, thiab low-pressure hydrogenation hloov BYD mus rau hauv BED thiab BDO. Tom qab sib cais, theem ob yog high-pressure hydrogenation siv loaded nickel ua catalyst los hloov BED mus rau hauv BDO.
Cov tshuaj catalyst hydrogenation thawj zaug: hmoov Raney nickel catalyst
Cov tshuaj catalyst hydrogenation thawj zaug: Hmoov Raney nickel catalyst. Cov tshuaj catalyst no feem ntau yog siv rau hauv qhov chaw hydrogenation qis-siab ntawm ISP txheej txheem, rau kev npaj cov khoom BDO. Nws muaj cov yam ntxwv ntawm kev ua haujlwm siab, kev xaiv zoo, tus nqi hloov pauv, thiab kev sib sau ua ke sai. Cov khoom tseem ceeb yog nickel, txhuas, thiab molybdenum.
Cov tshuaj catalyst hydrogenation thawj zaug: hmoov nickel txhuas alloy hydrogenation catalyst
Tus catalyst xav tau kev ua haujlwm siab, lub zog siab, tus nqi hloov pauv siab ntawm 1,4-butynediol, thiab tsawg dua cov khoom lag luam.
Cov tshuaj catalyst hydrogenation theem nrab
Nws yog ib qho catalyst txhawb nqa nrog alumina ua tus cab kuj thiab nickel thiab tooj liab ua cov khoom xyaw nquag. Lub xeev txo qis khaws cia rau hauv dej. Cov catalyst muaj lub zog siab, kev poob qis kev sib txhuam, kev ruaj khov tshuaj zoo, thiab yooj yim rau kev ua haujlwm. Cov khoom me me zoo li clover dub.
Cov Ntaub Ntawv Thov ntawm Catalysts
Siv rau BYD los tsim BDO los ntawm catalyst hydrogenation, siv rau 100000 tuj BDO unit. Ob pawg ntawm cov reactors txaj ruaj khov ua haujlwm tib lub sijhawm, ib qho yog JHG-20308, thiab lwm qhov yog cov catalyst xa tuaj.
Kev Tshuaj Xyuas: Thaum lub sijhawm tshuaj xyuas cov hmoov zoo, nws tau pom tias JHG-20308 lub txaj kho catalyst tsim cov hmoov zoo tsawg dua li cov catalyst xa tuaj.
Kev Ua Kom Ua: Catalyst Activation Xaus Lus: Cov xwm txheej ua kom ua haujlwm ntawm ob lub catalysts yog tib yam. Los ntawm cov ntaub ntawv, tus nqi delumination, qhov sib txawv ntawm qhov kub thiab txias nkag thiab tawm, thiab kev ua kom sov tso tawm ntawm cov hlau ntawm txhua theem ntawm kev ua kom ua haujlwm yog sib xws heev.
Kub: Qhov kub ntawm cov tshuaj tiv thaiv ntawm JHG-20308 catalyst tsis txawv ntawm qhov ntawm cov catalyst xa tuaj, tab sis raws li cov ntsiab lus ntsuas kub, JHG-20308 catalyst muaj kev ua haujlwm zoo dua li cov catalyst xa tuaj.
Cov Khoom Tsis Zoo: Los ntawm cov ntaub ntawv kuaj pom ntawm BDO cov kua roj nyoos thaum ntxov ntawm cov tshuaj tiv thaiv, JHG-20308 muaj cov khoom tsis zoo me ntsis hauv cov khoom tiav piv rau cov catalysts xa tuaj, feem ntau yog cuam tshuam hauv cov ntsiab lus ntawm n-butanol thiab HBA.
Zuag qhia tag nrho, qhov kev ua tau zoo ntawm JHG-20308 catalyst yog ruaj khov, tsis muaj cov khoom lag luam siab pom tseeb, thiab nws cov kev ua tau zoo yog qhov zoo ib yam lossis zoo dua li cov catalysts xa tuaj.
Cov txheej txheem ntau lawm ntawm cov txaj ruaj khov nickel txhuas catalyst
(1) Kev Smelting: Nickel aluminium alloy yog yaj ntawm qhov kub siab thiab tom qab ntawd pov rau hauv cov duab.
(2) Kev tsoo: Cov hlau nplaum raug tsoo ua cov khoom me me los ntawm cov khoom siv tsoo.
(3) Kev Tshuaj Xyuas: Tshuaj xyuas cov khoom me me uas muaj qhov loj me tsim nyog.
(4) Kev Ua Kom Ua: Tswj qee qhov kev sib xyaw thiab cov nqi ntws ntawm cov kua alkali kom ua kom cov khoom me me hauv lub pej thuam tshuaj tiv thaiv ua haujlwm.
(5) Cov ntsuas kev tshuaj xyuas: cov ntsiab lus hlau, kev faib tawm qhov loj me ntawm cov khoom me me, lub zog sib tsoo compressive, qhov ceev ntawm cov khoom loj, thiab lwm yam.
Lub sijhawm tshaj tawm: Cuaj hlis-11-2023
