Acrylonitrile (AN) yog ib qho tseem ceeb tshuaj nruab nrab rau kev sib txuas ntawm ABS resin, acrylic fiber, nitrile roj hmab, thiab dej kho flocculants, thiab propylene yog cov tseem ceeb tshaj plaws monomer raw khoom rau kev lag luam ntawm acrylonitrile. Tam sim no, lub ntiaj teb no mainstream acrylonitrile ntau lawm txoj kev yog propylene ammoxidation txoj kev. Ntau lub tuam txhab tsim khoom tsom rau kev tswj cov tshuaj tiv thaiv kub thiab qhov sib piv ntawm huab cua mus rau ammonia, tab sis yooj yim saib tsis tu ncua cuam tshuam los ntawm propylene raw khoom zoo. Cov kab tsis huv hauv propylene txo cov kev xaiv catalyst, nce los ntawm - cov khoom xws li acetonitrile, hydrogen cyanide, thiab carbon oxides, thiab nce kev sib cais ntawm lub zog noj. Tsab ntawv xov xwm no tau teeb tsa cov xwm txheej ntawm daim ntawv thov ntawm propylene hauv acrylonitrile ntau lawm, tshuaj xyuas cov txheej txheem zoo ntawm siab -propylene zoo, thiab muab cov hauv paus xaiv rau kev yuav khoom raw los ntawm cov nroj tsuag acrylonitrile.
I. Daim Ntawv Thov Scenario ntawm Propylene hauv Acrylonitrile Cov Txheej Txheem Ntau Lawm
Propylene tau txais cov tshuaj tiv thaiv ammoxidation nrog ammonia roj thiab cua nyob rau hauv qhov kev ua ntawm molybdenum -bismuth catalysts los tsim acrylonitrile. Tag nrho cov txheej txheem yog rhiab heev rau cov ntaub ntawv raw, thiab propylene muaj pes tsawg leeg stability ncaj qha txiav txim siab hloov pauv chav tsev thiab qib kev nyab xeeb.
Cov txheej txheem kev lag luam tseem ceeb yog Sohio propylene ammoxidation txoj kev, nrog kev ua tiav cov tshuaj tiv thaiv:
Propylene, ammonia gas, thiab compressed cua nkag mus rau hauv lub txaj fluidized reactor nyob rau hauv kev faib ua feem thiab undergo ammoxidation cov tshuaj tiv thaiv nyob rau hauv tej yam kev mob saum toj no 400℃nrog molybdenum-bismuth catalysts los tsim crude acrylonitrile;
Cov tshuaj tiv thaiv cov roj sib xyaw ua kom txias txias, nqus, thiab desorption kom tau txais cov acrylonitrile crude;
Los ntawm ntau-Kem txuas ntxiv mus, cov impurities xws li acetonitrile, hydrogen cyanide, thiab dej tau sib cais los tsim cov acrylonitrile refined, ntxiv rau hauv qab rau ABS thiab acrylic fiber ntau lawm kab.
Propylene koom nrog hauv cov tshuaj tiv thaiv tseem ceeb raws li cov pa roj carbon monoxide skeleton. Propyne thiab propadiene nyob rau hauv cov khoom siv raw yooj yim nkag mus tob oxidation, aggravating carbon deposition ntawm catalyst nto; sulfides tsis tu ncua rhuav tshem catalyst active chaw. Ntau chav nyob ua rau luv luv catalyst regeneration cycles thiab txawv txav nyob rau hauv los ntawm - cov khoom hydrogen cyanide tso tawm, nrog rau cov hauv paus ntsiab lus feem ntau yog impurities ntau dhau nyob rau hauv propylene raw khoom.
Raws li propylene qhov chaw tsim khoom, ZL Zog ua kom zoo dua cov khoom lag luam hauv kev tswj xyuas raws li cov yam ntxwv ntawm cov txheej txheem acrylonitrile ammoxidation, tso siab rau ntau -theem rectification kom stabilize propylene purity, nruj me ntsis txwv propylene, propadiene, tag nrho cov sulfur, thiab C4+ cov ntaub ntawv hnyav, cov khoom sib txuas, thiab kev hloov pauv ntawm cov khoom siv roj. cov txheej txheem tshuaj xyuas tuaj ntawm cov kua dej loj hauv txaj acrylonitrile thiab txhawb nqa ntev - voj voog txuas ntxiv lav rau cov units.
II. Core Performance Advantages of High -Quality propylene hauv Acrylonitrile Production
Muaj propylene nrog purity ruaj khov thiab tsis muaj impurities tuaj yeem ua rau qeeb cov pa roj carbon deposition thiab lom, txhim kho acrylonitrile selectivity, stabilize reactor tej yam kev mob, txo rectification sib cais load, thiab ntev lub sij hawm ua hauj lwm chav tsev.
Propylene ammoxidation yog ib qho tshuaj tiv thaiv exothermic. Molybdenum-bismuth catalysts muaj kev cia siab rau ntau yam impurities. High - zoo propylene coj ntau yam txiaj ntsig:
Slow Catalyst Deactivation, Txo Regeneration zaus
Sulfides ua rau kev puas tsuaj mus tas li rau cov catalysts; unsaturated alkynes yooj yim polymerize thiab tso carbon npog cov chaw nquag. Tsawg- impurity propylene tuaj yeem txuas ntxiv lub neej kev pabcuam catalyst thiab txo cov nqi tsim tawm.
Txhim kho Acrylonitrile Yield, Tswj los ntawm -Cov khoom tso tawm
Cov impurities ua rau oxidation sib sib zog nqus, tsim cov CO, CO₂, thiab acetonitrile ntau. Kev tsim nyog propylene tuaj yeem txhim kho lub hom phiaj xaiv cov khoom lag luam, txo los ntawm -cov khoom siv kho siab, thiab txo qis propylene raw khoom siv chav tsev.
Stabilize Fluidized Bed Reaction Xeev, zam qhov kub qhov kub
Kev hloov pauv loj hauv propylene muaj pes tsawg leeg yooj yim ua rau lub hauv paus reactor overheating, nqa kev nyab xeeb; propylene nrog cov ntsuas ruaj khov pab tswj cov txheej txheem tswj thiab tswj kom ruaj khov fluidized txaj load.
Txo Refining System Load, Stabilize tiav cov khoom zoo
Nce los ntawm- cov khoom ua rau kev txhim kho ntauwd sib cais nyuaj; Kev taw qhia tas li ntawm impurities kuj yooj yim ua rau muaj kev hloov pauv hauv cov xim acrylonitrile thiab cov cim polymerization inhibitor, cuam tshuam rau hauv qab ntawm ABS resin zoo.
| Cov khoom sib piv | Ua raws li kev lag luam propylene (Suitable rau Acrylonitrile units) | propylene nrog ntau dhau impurities | Direct Negative Production Impacts |
|---|---|---|---|
| Propylene Purity | Ntau dua lossis sib npaug li 99.5% | Tsawg purity, hnyav tivthaiv enrichment | Reaction load fluctuation, nruam nce nyob rau hauv raw khoom noj |
| Propyne, Propadiene | Kev tswj hwm nruj nruj | Cov ntsiab lus siab | Ceev ceev catalyst carbon deposition, txo fluidized txaj tshav kub pauv efficiency |
| Tag nrho cov ntsiab lus Sulfur | Tsawg tus qauv tswj hwm sab hauv | Cov ntsiab lus sulfur ntau dhau | Irreversible lom ntawm molybdenum-bismuth catalyst, nruam selectivity poob |
| Los ntawm -Product Level | ruaj khov acetonitrile thiab hydrogen cyanide tso zis | Pom tau tias nce los ntawm - khoom | Ua kom rectification zog noj, nce kev puas tsuaj cov nqi kho mob |
| Chav ua haujlwm Status | Ntev - lub sijhawm ua haujlwm ruaj khov ruaj khov ua tau | Cov txheej txheem tsis tu ncua kev hloov kho, catalyst regeneration | Lub sijhawm ua haujlwm luv luv, ua kom tiav cov nqi |
III. Hard Requirements for Key Propylene Raw Material Indicators nyob rau hauv Acrylonitrile Ammoxidation txheej txheem
Cov txheej txheem acrylonitrile ammoxidation fluidized txaj yog rhiab rau unsaturated impurities, thiab sib xyaw propylene raug txwv. Peb qhov taw qhia tseem ceeb ntawm propyne + propadiene, tag nrho cov sulfur, thiab cov khoom hnyav yog cov ntsiab lus tswj hwm. Acrylonitrile unit raw khoom yuav tsum tau poob ntawm polypropylene thiab HPPO propylene oxide, tab sis alkyne tswj yog ib qho tseem ceeb heev:
Propyne, Propadiene:Tsis tshua muaj tshwm sim rau polymerization thiab coking nyob rau hauv siab -kub fluidized txaj, adhering rau catalyst particle nto thiab txo cov nyhuv fluidization thiab kub pauv efficiency;
Tag nrho Sulfur:Trace sulfides tsis tu ncua sib sau ua ke, txuas ntxiv rhuav tshem cov chaw ua haujlwm catalytic;
C4 Heavy Cheebtsam:Ua rau tawg thiab oxidation cov tshuaj tiv thaiv, nce los ntawm - cov khoom thiab tom qab sib cais lub nra.
Tsawg- nqi sib xyaw propylene ntawm kev ua lag luam muaj qhov sib txawv ntawm cov khoom sib txawv. Lub sij hawm luv luv - nws yuav tshwm sim kom txuag tau tus nqi yuav khoom, tab sis ntev - lub sij hawm nws ua rau tsis muaj kev poob xws li kev siv hluav taws xob ntau ntxiv thiab kev siv hluav taws xob. ZL Energy's propylene siv kev ywj pheej rectification ntau lawm thiab muab faib lub tank cia, tshem tawm cov khoom siv sab nraud, thiab tuaj yeem ua tau raws li cov kev xav tau ntawm cov khoom siv roj ruaj khov ntawm - nplai acrylonitrile units.
IV. Cov Ntsiab Lus Qhia Txog Cov Lus Pom Zoo rau Propylene Procurement thiab Siv los ntawm Acrylonitrile Enterprises
Propylene procurement tsis tuaj yeem sib piv cov nqi; nws yuav tsum tau ntsuas qhov ntsuas impurity thiab batch stability. Ua ntej hloov cov pa roj, qhov nruab nrab - thiab ntev - lub sij hawm ua hauj lwm mob taug qab yuav tsum tau ua.
Rau kev tsim kho tshiab lossis rov pib dua- tom qab- tu cov acrylonitrile units, niaj hnub sim propylene tag nrho cov sulfur, alkyne, thiab cov ntsuas hnyav;
Thaum hloov cov khoom siv propylene, tsis tu ncua saib xyuas cov kev hloov pauv hloov pauv, kev xaiv, thiab los ntawm -cov khoom acetonitrile thiab hydrogen cyanide tso zis;
Txhim kho propylene pretreatment cov chaw, nruab nrog cov khoom pom thiab ziab kom qhuav, tiv thaiv cov impurities thib ob qhia thaum thauj;
Cov kab ntau lawm txuas ntxiv yuav tsum tau ua qhov tseem ceeb rau kev kos npe ntev - cov ntawv cog lus roj av los tiv thaiv cov khoom lag luam poob siab los ntawm kev lag luam hloov pauv.
