BDO, tseem hu ua 1,4-butanediol, yog ib qho tseem ceeb ntawm cov organic thiab zoo tshuaj raw khoom. BDO tuaj yeem npaj los ntawm txoj kev acetylene aldehyde, txoj kev maleic anhydride, propylene cawv txoj kev, 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 txheej txheem zoo. Acetylene thiab formaldehyde yog thawj condensed los tsim 1,4-butynediol (BYD), uas yog ntxiv hydrogenated kom tau BDO.
Nyob rau hauv lub siab (13.8 ~ 27.6 MPa) thiab tej yam kev mob 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), thiab ces lub intermediate 1,4-butynediol yog hydrogenated. rau BDO siv Raney nickel catalyst. Cov yam ntxwv ntawm txoj kev classical yog tias cov catalyst thiab cov khoom tsis tas yuav tsum tau sib cais, thiab cov nqi khiav lag luam yog tsawg. Txawm li cas los xij, acetylene muaj ib feem siab siab thiab muaj kev pheej hmoo ntawm kev tawg. Qhov kev nyab xeeb ntawm lub reactor tsim yog siab li 12-20 lub sij hawm, thiab cov khoom siv loj thiab kim, ua rau muaj kev nqis peev ntau; Acetylene yuav polymerize los tsim polyacetylene, uas deactivates lub catalyst thiab thaiv cov raj xa dej, ua rau lub voj voog luv luv thiab txo cov zis.
Hauv kev teb rau qhov tsis txaus thiab qhov tsis zoo ntawm cov txheej txheem ib txwm muaj, cov khoom siv tshuaj tiv thaiv thiab cov catalysts ntawm cov tshuaj tiv thaiv kab mob tau ua kom zoo kom txo qis ib feem ntawm acetylene hauv cov tshuaj tiv thaiv. Txoj kev no tau siv dav hauv ob lub tebchaws thiab thoob ntiaj teb. Nyob rau tib lub sijhawm, kev sib txuas ntawm BYD yog nqa tawm siv lub txaj sludge lossis lub txaj tshem tawm. Txoj kev acetylene aldehyde BYD hydrogenation ua BDO, thiab tam sim no cov txheej txheem ISP thiab INVISTA yog cov siv dav tshaj plaws hauv Suav teb.
① Synthesis ntawm butynediol los ntawm acetylene thiab formaldehyde siv tooj liab carbonate catalyst
Siv rau acetylene tshuaj seem ntawm BDO txheej txheem hauv INVIDIA, formaldehyde reacts nrog acetylene los tsim 1,4-butynediol nyob rau hauv qhov kev txiav txim ntawm tooj liab carbonate catalyst. Cov tshuaj tiv thaiv kub yog 83-94 ℃, thiab lub siab yog 25-40 kPa. Cov catalyst muaj cov hmoov ntsuab zoo li.
② Catalyst rau hydrogenation ntawm butynediol rau BDO
Ntu hydrogenation ntawm cov txheej txheem muaj ob lub siab-siab ruaj txaj reactors txuas nrog hauv koob, nrog 99% ntawm cov tshuaj tiv thaiv hydrogenation ua tiav hauv thawj reactor. Thawj thiab thib ob hydrogenation catalysts yog qhib nickel aluminium alloys.
Tsau txaj Renee npib tsib xee yog npib tsib xee aluminium alloy thaiv nrog qhov ntau thiab tsawg ntawm 2-10mm, lub zog siab, hnav tsis kam, qhov loj ntawm qhov chaw, zoo dua catalyst stability, thiab kev pab lub neej ntev.
Unactivated taag txaj Raney nickel hais yog greyish dawb, thiab tom qab ib tug tej yam concentration ntawm cov kua alkali leaching, lawv ua dub los yog dub grey hais, feem ntau yog siv nyob rau hauv lub txaj ruaj reactors.
① Copper txhawb catalyst rau cov synthesis ntawm butynediol los ntawm acetylene thiab formaldehyde
Raws li qhov kev txiav txim ntawm kev txhawb nqa tooj liab bismuth catalyst, formaldehyde reacts nrog acetylene los tsim 1,4-butynediol, ntawm qhov kub thiab txias ntawm 92-100 ℃ thiab siab ntawm 85-106 kPa. Cov catalyst zoo li cov hmoov dub.
② Catalyst rau hydrogenation ntawm butynediol rau BDO
Cov txheej txheem ISP siv ob theem ntawm hydrogenation. Thawj theem yog siv hmoov nickel aluminium alloy ua catalyst, thiab low-pressure hydrogenation converts BYD rau BED thiab BDO. Tom qab sib cais, theem thib ob yog high-pressure hydrogenation siv cov nickel loaded ua catalyst hloov BED rau hauv BDO.
Primary hydrogenation catalyst: hmoov Raney nickel catalyst
Primary hydrogenation catalyst: Hmoov Raney nickel catalyst. Cov catalyst no feem ntau yog siv nyob rau hauv qis-siab hydrogenation seem ntawm ISP txheej txheem, rau kev npaj ntawm BDO cov khoom. Nws muaj cov yam ntxwv ntawm kev ua haujlwm siab, kev xaiv zoo, hloov pauv tus nqi, thiab kev daws teeb meem ceev ceev. Cov khoom tseem ceeb yog npib tsib xee, txhuas, thiab molybdenum.
Primary hydrogenation catalyst: hmoov nickel aluminium alloy hydrogenation catalyst
Lub catalyst xav tau kev ua haujlwm siab, siab zog, siab hloov pauv ntawm 1,4-butynediol, thiab tsawg dua los ntawm cov khoom.
Secondary hydrogenation catalyst
Nws yog ib qho kev txhawb nqa catalyst nrog alumina ua cov cab kuj thiab npib tsib xee thiab tooj liab raws li cov khoom siv. Lub xeev txo yog khaws cia hauv dej. Lub catalyst muaj lub zog txhua yam, tsis muaj kev sib txhuam tsis zoo, tshuaj lom neeg ruaj khov, thiab yooj yim rau qhib. Dub clover zoo li tus hais nyob rau hauv tsos.
Daim ntawv thov Case ntawm Catalysts
Siv rau BYD los tsim BDO los ntawm catalyst hydrogenation, thov rau 100000 tuj BDO chav tsev. Ob txheej ntawm lub txaj ruaj khov reactors ua haujlwm ib txhij, ib qho yog JHG-20308, thiab lwm qhov yog cov khoom siv hluav taws xob.
Kev tshuaj ntsuam xyuas: Thaum lub sij hawm tshuaj xyuas cov hmoov zoo, nws tau pom tias JHG-20308 ruaj txaj catalyst tsim cov hmoov zoo dua li cov catalyst tuaj.
Activation: Catalyst Activation Conclusion: Cov xwm txheej ua kom muaj ob lub catalyst yog tib yam. Los ntawm cov ntaub ntawv, tus nqi dealumination, inlet thiab qhov hluav taws xob kub sib txawv, thiab activation tshuaj tiv thaiv tshav kub tso tawm ntawm alloy nyob rau hauv txhua theem ntawm activation yog zoo ib yam.
Qhov kub thiab txias: Cov tshuaj tiv thaiv kub ntawm JHG-20308 catalyst tsis txawv ntawm cov catalyst tuaj txawv teb chaws, tab sis raws li cov ntsiab lus ntsuas kub, JHG-20308 catalyst muaj kev ua haujlwm zoo dua li cov khoom catalyst.
Impurities: Los ntawm cov ntaub ntawv tshawb pom ntawm BDO crude tov nyob rau theem pib ntawm cov tshuaj tiv thaiv, JHG-20308 muaj me ntsis impurities nyob rau hauv cov khoom tiav lawm piv rau imported catalysts, feem ntau yog reflected nyob rau hauv cov ntsiab lus ntawm n-butanol thiab HBA.
Zuag qhia tag nrho, kev ua tau zoo ntawm JHG-20308 catalyst yog qhov ruaj khov, tsis muaj qhov pom tseeb ntawm cov khoom lag luam siab, thiab nws qhov kev ua tau zoo yog qhov zoo ib yam lossis tseem zoo dua li cov khoom catalysts.
Cov txheej txheem ntau lawm ntawm lub txaj ruaj nickel aluminium catalyst
(1) Smelting: Nickel aluminium alloy yog melted ntawm kub thiab ces cam khwb cia rau hauv cov duab.
(2) Crushing: Cov hlau nplaum yog crushed rau hauv cov khoom me me los ntawm cov khoom siv crushing.
(3) Kev tshuaj ntsuam xyuas: Kev tshuaj xyuas cov khoom uas tsim nyog raws li qhov loj me.
(4) Ua kom muaj zog: Tswj ib qho concentration thiab ntws tus nqi ntawm cov kua alkali kom qhib cov khoom hauv cov tshuaj tiv thaiv ntauwd.
(5) Kev soj ntsuam ntsuas: hlau cov ntsiab lus, particle loj faib, compressive crushing zog, bulk ntom, thiab lwm yam.
Post lub sij hawm: Sep-11-2023
