Acrylic acid thiab nws cov esters yog cov tshuaj intermediates tseem ceeb rau txheej txheej, nplaum, tshuaj kho dej, thiab textile auxiliaries, thiab propylene yog cov khoom siv tseem ceeb tshaj plaws rau kev tsim khoom ntawm acrylic acid. Feem ntau ntawm domestic acrylic acid units siv propylene catalytic oxidation txoj kev. Ntau lub tuam txhab tsim khoom tsom rau kev ua kom zoo dua oxidation reactor kub, qhov chaw tshaj tawm, thiab lwm yam txheej txheem, tab sis yooj yim saib xyuas qhov cuam tshuam tsis tu ncua coj los ntawm propylene monomer zoo. Cov kab tsis huv hauv cov khoom siv raw ua rau txo qis kev xaiv catalyst thiab nce los ntawm - cov khoom, uas tsis tsuas yog nce cov khoom siv raw cov khoom noj tab sis kuj yooj yim ua rau ntau cov xim ntawm cov kua qaub tiav lawm. Tsab ntawv xov xwm no tau npaj cov ntawv thov scenarios ntawm propylene nyob rau hauv acrylic acid kev lag luam saw, tshuaj xyuas cov txheej txheem zoo ntawm siab - zoo propylene, thiab muab kev xaiv rau cov ntaub ntawv raw khoom los ntawm acrylic acid nroj tsuag.
I. Daim Ntawv Thov Scenario ntawm Propylene hauv Acrylic Acid thiab Ester Industry Chain
Propylene generates crude acrylic acid los ntawm ob-theem gas-theem catalytic oxidation. Tom qab ua kom zoo, nws tuaj yeem raug muag ncaj qha lossis txuas ntxiv rau hauv ntau yam acrylic esters. Tag nrho cov txheej txheem yog rhiab heev rau propylene impurities, thiab raw khoom stability ncaj qha txiav txim siab ua hauj lwm efficiency.
Tam sim no, lub ntiaj teb no mainstream acrylic acid ntau lawm txoj kev yog ob -theem propylene oxidation txoj kev, nrog ib tug ntshiab txheej txheem khiav:
Thawj theem oxidation: propylene → Acrolein
propylene thiab huab cua raug oxidation cov tshuaj tiv thaiv nyob rau hauv qhov kev txiav txim ntawm molybdenum-bismuth catalysts los tsim acrolein;
Theem II Oxidation: Acrolein → Acrylic Acid
Acrolein yog ntxiv catalytically oxidized nyob rau hauv molybdenum -vanadium catalysts kom tau crude acrylic acid;
Refining thiab Downstream Extension
Crude acrylic acid undergoes extraction thiab rectification kom tshem tawm impurities xws li acetic acid thiab furfural, tau refined acrylic acid; refined acrylic acid ces reacts nrog methanol, ethanol, thiab butanol los npaj cov khoom xws li methyl acrylate, ethyl acrylate, thiab butyl acrylate.
Tag nrho cov txheej txheem oxidation yog cov tshuaj tiv thaiv exothermic xaiv catalytic. Thaum propylene muaj pes tsawg leeg hloov pauv lossis impurities dhau qhov kev txwv, qhov kub ntawm qhov chaw tsiv teb tsaws chaw thiab ntau ntawm los ntawm - cov khoom yuav tshwm sim heev. Qee qhov kev lag luam muaj kev nce hauv acetic acid thiab aldehyde impurities tom qab hloov cov pa roj propylene, thiab cov laj thawj tseem ceeb nyob hauv kev tswj cov khoom tsis txaus.
Raws li propylene qhov chaw tsim khoom lag luam, ZL Zog ua kom zoo dua cov khoom lag luam hauv kev tswj xyuas raws li cov yam ntxwv ntawm acrylic acid oxidation txheej txheem, nruj me ntsis tswj propylene, propadiene, tag nrho cov sulfur, thiab hnyav hydrocarbon Cheebtsam. Nws tso siab rau cov kev hloov kho tas mus li kom ntseeg tau tias cov khoom sib xyaw ua ke ruaj khov, teeb meem ua tiav chromatography xeem daim ntawv tshaj tawm rau txhua pawg, ua tau raws li cov kev xav tau ntawm cov khoom siv acrylic acid, thiab yoog mus rau qhov ntev -lub sij hawm muab kev lav phib xaub xav tau ntawm loj -scale nruam acrylic acid ntau lawm kab.
II. Core Performance Advantages of High -Quality propylene hauv Acrylic Acid Production
Propylene nrog purity ruaj khov thiab tsis muaj impurities tuaj yeem tiv thaiv ob -theem oxidation catalysts, txo cov kev tawm tsam sab nraud, txhim kho acrylic acid tawm los, txo qis refining unit load, thiab ncua ntev - lub sijhawm ua haujlwm ntawm lub tsev.
Molybdenum-bismuth thiab molybdenum-vanadium oxidation catalysts yog qhov cuam tshuam rau kev lom los ntawm sulfides thiab unsaturated hydrocarbons; Nyob rau tib lub sijhawm, alkynes thiab cov khoom hnyav dhau los ua polymerization thiab sib sib zog nqus oxidation, tsim cov organic acids thiab resinous tar. High -propylene zoo tuaj yeem nqa tau ntau yam txiaj ntsig:
Ncua Catalyst Activity Decay, Extend Regeneration Cycle
Cov impurities xws li sulfur thiab diolefins txuas ntxiv rhuav tshem cov chaw ua haujlwm catalyst. Tsawg- impurity propylene tuaj yeem txuas ntxiv lub neej kev pabcuam catalyst thiab txo cov nqi hloov thiab rov tsim dua tshiab.
Txhim kho Reaction Selectivity, Txo Los ntawm -Cov Khoom Muag
Cov impurities ua rau sib sib zog nqus oxidation, tsim acetic acid, CO, thiab CO₂. Kev ruaj khov tsim nyog propylene tuaj yeem txo qhov los ntawm - cov khoom faib khoom, txhim kho ib zaug - dhau cov kua qaub acrylic, thiab txo cov propylene chav tsev noj.
Stabilize Reactor Kub Spots, zam kev nyab xeeb txaus ntshai
Cov impurities ua rau muaj kev kub ntxhov hauv zos thiab kub qhov chaw tsiv teb tsaws, ua rau muaj kev pheej hmoo ntawm reactor runaway; propylene nrog cov sib xyaw ua ke ua kom yooj yim tswj cov txheej txheem thiab ua kom ruaj khov ntawm cov txheej txheem oxidation.
Txo Rectification zog noj, txhim kho tiav Acrylic Acid zoo
Nce los ntawm- cov khoom xws li furfural thiab organic acids ua rau kom muaj kev sib cais sib cais nyuaj thiab tseem ua rau acrylic acid yellowing; siab -cov propylene zoo tuaj yeem ua kom cov xim khoom ruaj khov thiab txo cov khoom tsis zoo - ua raws li cov khoom.
| Cov khoom sib piv | Raws li kev lag luam propylene (Suitable rau Acrylic Acid Units) | propylene nrog ntau dhau impurities | Direct Production Impact |
|---|---|---|---|
| Propylene Purity | Ntau dua lossis sib npaug li 99.5% | Tsawg purity, hnyav tivthaiv enrichment | Oxidation load fluctuation, nce propylene noj |
| Propyne, Propadiene | Kev tswj hwm nruj nruj | Cov ntsiab lus siab | Tsim tar clogging pipelines, aggravates catalyst carbon deposition |
| Tag nrho cov ntsiab lus Sulfur | Tsawg tus qauv tswj hwm sab hauv | Cov ntsiab lus sulfur ntau dhau | Cov tshuaj lom mus tas li ntawm oxidation catalyst, ceev selectivity poob |
| Los ntawm -Product Level | Acetic acid thiab aldehyde impurities ruaj khov thiab qis | Los ntawm - cov khoom tsis tu ncua nce | Ua kom rectification zog noj, acrylic acid prone rau discoloration |
| Chav ua haujlwm Status | Ntev - lub sijhawm ua haujlwm ruaj khov ruaj khov ua tau | Cov txheej txheem nquag hloov kho, ntau zaus catalyst regeneration | Ntxiv cov nqi tu, ua kom lub sijhawm ua haujlwm tau zoo |
III. Hard Requirements for Key Propylene Raw Material Indicators in Acrylic Acid Units
Ob -theem oxidation txheej txheem rau acrylic acid yog ib tug heev xaiv catalytic system. Blended propylene tsis tuaj yeem siv; industrial propylene tsim los ntawm rectification yuav tsum raug xaiv, nrog rau cov kev soj ntsuam tseem ceeb ntawm peb lub ntsiab lus tseem ceeb: alkynes, tag nrho cov sulfur, thiab cov khoom hnyav.
Cov txheej txheem acrylic acid tsis yog nruj raws li cov qauv metallocene PP lossis HPPO propylene oxide, tab sis nws qhov kev kam rau siab yog qis dua li cov roj hluav taws xob zoo tib yam. Core tswj cov lus qhia:
Propyne, Propadiene:Unsaturated Cheebtsam yooj yim polymerize thiab coke nyob rau hauv oxidation ib puag ncig, clogging tshav kub exchangers thiab catalyst txaj thaum lub sij hawm ntev - ua hauj lwm;
Tag nrho Sulfur:Trace sulfides txuas ntxiv mus, irreversibly ua rau oxidation catalyst;
C4 thiab saum toj no hnyav Cheebtsam:Decompose nyob rau hauv tshav kub kom tsim hnyav los ntawm -cov khoom, ua kom lub siab nyob rau hauv refining seem.
Qee qhov qis- nqi sib xyaw propylene ntawm lub khw muaj qhov sib txawv loj. Lub sij hawm luv luv - nws yuav tshwm sim kom txuag tau tus nqi yuav khoom, tab sis ntev - lub sij hawm nws coj cov kev poob zais xws li catalyst noj thiab nce cov khoom siv raw khoom noj. ZL Energy cov khoom siv propylene tau kho nws tus kheej thiab khaws cia rau hauv cov tso tsheb hlau luam sib faib, tshem tawm cov khoom sib xyaw ua ke, thiab tuaj yeem muab sijhawm ntev -cov roj av ruaj khov rau cov nroj tsuag acrylic acid loj.
IV. Tswv yim Summary ntawm cov lus pom zoo rau Propylene Procurement thiab siv los ntawm Acrylic Acid Enterprises
Kev yuav khoom propylene xav tau kev txiav txim siab zoo ntawm purity, impurity stability, thiab ntev -lub sij hawm muab kev lav peev. Tus nqi ib leeg yuav tsum tsis txhob siv los ua lub hauv paus rau kev txiav txim siab yuav khoom.
Ua ntej ntxiv cov khoom siv acrylic acid tshiab lossis hloov cov khoom siv propylene, ua cov txheej txheem sim ua haujlwm thiab tsis tu ncua taug qab cov kev hloov pauv hauv cov txiaj ntsig, los ntawm - cov khoom, thiab cov xwm txheej catalyst;
Txhim kho cov khoom soj ntsuam tuaj; Ntxiv nrog rau kev purity niaj hnub, niaj hnub sim tag nrho cov sulfur, alkynes, thiab cov khoom hnyav;
Tsis tu ncua tswj cov propylene pretreatment system, nruab nrog adsorption thiab filtration units, kom tsis txhob lwm yam impurities qhia los ntawm kev thauj mus los pipelines;
Cov lag luam loj loj tsis tu ncua - nplai ntau lawm yuav tsum ua qhov tseem ceeb rau kev kos npe ntev - cov ntawv cog lus roj av los tiv thaiv cov khoom lag luam hloov pauv kev pheej hmoo.
Yog tias cov tuam txhab tsim khoom lag luam acrylic acid thiab acrylate tau ua cov khoom siv raw khoom los yog tshuaj xyuas cov khoom siv roj propylene, ZL Zog tuaj yeem muab cov qauv rau kev ua haujlwm ua pov thawj thiab tsim cov roj tsim nyog raws li cov txheej txheem oxidation unit.
