MMA, cov npe hu ua methyl methacrylate, yog ib qho khoom siv tseem ceeb rau kev tsim cov polymethyl methamine (PMMA), uas tseem muaj npe hu ua Acrylic. Nrog kev txhim kho ntawm PMA txoj kev lag luam hloov kho, kev txhim kho MMA kev lag luam saw tau raug thawb rov qab. Raws li kev sojntsuam, muaj peb cov txheej txheem sib txuam ntawm MMA, uas yog acetone cyetone cyanohydrin txoj kev (att txoj kev), attylene carbonylation txoj kev thiab IsoButylene Oxidation txoj kev (C4 txoj kev). Tam sim no, ACH txoj kev thiab C4 txoj kev yog siv nyob rau hauv Suav tsim khoom lag luam, thiab tsis muaj chav ua haujlwm tsim khoom ethylene carbonylation txoj kev.

Peb txoj kev tshawb fawb ntawm MMA tus nqi saw tshuaj xyuas kev ntsuas cov saum toj no peb cov txheej txheem ntau lawm thiab cov tseem ceeb hauv qab pmma nqe hato.

Daim duab 1 yeeb cov duab txaus ntawm MMA kev lag luam saw nrog cov txheej txheem sib txawv (duab qhov chaw: tshuaj kev lag luam)

Kev lag luam saw I: ach txoj kev MMA tus nqi saw
Hauv cov txheej txheem ntau lawm ntawm ACH txheej txheem MMA, lub ntsiab raw cov acrumiturile, thiab methaniliary acid, thiab methanol raws li tus nqi los xam cov khoom sib xyaw ntawm cov khoom raw. Ntawm lawv, 0.69 tons ntawm acetone thiab 0,32 tons ntawm acrylonitrile thiab 0.35 tons ntawm methanol yog xam raws li kev noj haus. Hauv tus nqi muaj pes tsawg leeg ntawm ACH, Acetone tus nqi them rau cov nyiaj ntau tshaj plaws, ua raws li cov acryloniturile, thiab methanol nyiaj rau qhov ua faib tsawg tshaj plaws.

Raws li tus nqi cuam tshuam ntawm acetone, methanol thiab acrylonitrile nyob rau hauv peb xyoos Nws tuaj yeem pom tias muaj qhov sib txawv ntawm qhov no thiab feem sib pab hauv MMA, thaum cov kev hloov pauv ntawm MREETONE rau tus nqi ntawm MMA dua Acetone.

Txawm li cas los xij, tus nqi feem sib pab ntawm Methanol tsuas yog nyob rau ntawm txog 7%, thiab feem sib pab them tshuaj feem ntau yog li 26%. Rau kev kawm txog tus nqi saw ntawm MMA, nws tseem ceeb dua los saib tus nqi hloov pauv ntawm acetone.

Zuag qhia tag nrho, cov nqi saw ntawm ACH MMA feem ntau yog los ntawm tus nqi compressions of acetone thiab methanol, ntawm cov acetone muaj qhov cuam tshuam loj tshaj plaws ntawm tus nqi ntawm MMA.

Kev Lag Luam saw II: C4 Txuj Ci MMA Tus Nqi Saw

Rau cov nqi saw ntawm c4 txoj kev MMA, nws cov ntaub ntawv nyoos yog ISORUTHENTY thiab METHANOL, ntawm cov khoom lag luam yog lub siab yog los ntawm MTBE cracking ntau lawm. Thiab methanol yog kev muaj cov khoom siv methanol muaj kev lag luam, uas los ntawm cov khoom tawg.

Raws li tus nqi pes tsawg leeg ntawm C4 MMA, tus nqi nce toj yog Isobutene chav noj haus yog 0.82 thiab methanol yog 0.35. Nrog rau kev nce qib ntawm txhua tus neeg nyob hauv cov thev naus laus zis ntau lawm, cov chav tsev tau raug txo kom tsawg rau 0.8 hauv kev lag luam, uas tau txo tus nqi C4 MMA rau qee yam. Tus nqi so yog cov nqi dej, hluav taws xob thiab cov nqi roj, cov nqi nyiaj txiag, kev kho nyiaj txiag, dej phwj thiab lwm tus.

Hauv qhov no, kev sib koom ntawm kev ua kom siab-dawb-purity isobutylene nyob rau hauv tus nqi ntawm MMA li 58%, thiab kev sib koom ntawm cov methanol hauv tus nqi MMA yog li ntawm 6%. Nws tuaj yeem pom tau tias tus nqi loj tshaj plaws hauv C4 MMA, uas tus nqi hloov pauv ntawm ISOBUTENE muaj kev cuam tshuam loj rau tus nqi C4 MMA.

Tus nqi saw cuam tshuam rau cov siab purity isobutene yog traced rov qab mus rau tus nqi rov qab mus rau tus nqi kev hloov pauv ntawm 80% ntawm tus nqi rau kev ua siab dawb huv. Tus nqi ntawm Mtbe hauv lem los ntawm methanol thiab ether c4, uas muaj composition rau pre-ether c4 tuaj yeem txuas nrog pub rau tus nqi saw.

Ib qho ntxiv, nws yuav tsum tau sau tseg tias kev ua kom siab dua yog los ntawm Tert-butanol ua lub hauv paus nqi, thiab nws cov chav noj ntawm tert-butanol yog 1.52. Raws li kev xam ntawm Tert-Butanol 6200 yuan / Tuj, Tert-Butanol Accounts txog 70% ntawm MMA tus nqi, uas loj dua Isobutene.

Hauv lwm lo lus, yog tias tus nqi sib txuas ntawm Tert-Butanol yog siv, kev hloov pauv ntawm cov nqi saw ntawm c4, qhov hnyav hnyav ntawm tert-butanol yog ntau dua li ntawm isobutene.

Txhawm rau suav, hauv C4 MMA, qhov hnyav hnyav rau cov nqi hloov kho: Tert-Butanol, Isobutene, Mtbe, Methanol, roj av.

Kev Lag Luam Saw III: Ethylene CarbonyLation MMA Tus Nqi Siv

Tsis muaj rooj plaub ntawm MMA los ntawm Ethylene CarbonyLation hauv Suav teb, yog li kev cuam tshuam ntawm cov nqi hloov pauv tsis tau paub los ntawm kev tsim khoom lag luam. Txawm li cas los xij, raws li kev noj ntawm kev saib xyuas ntawm ethylene carbonylation, cuam tshuam tus nqi ntawm MMA tus nqi muaj pes tsawg leeg ntawm tus txheej txheem no, uas yog ntau tshaj 85%.

 
Kev lag luam saw hlau IV: PMMA tus nqi saw

PMMA, raws li cov khoom siv hauv qab av ntawm MMA, nyiaj rau ntau dua 70% ntawm kev noj txhua xyoo ntawm kev noj niam.

Raws li tus nqi saw muaj pes tsawg leeg sib xyaw PMMA, nyob rau hauv lub tsev noj mov noj ntawm MMA nyob rau hauv PMMA Accounts rau txog li 79%, uas yog qhov tseem ceeb feem pua.

Hauv lwm lo lus, tus nqi hloov pauv ntawm MMA muaj qhov cuam tshuam zoo ntawm tus nqi PMMA, uas yog qhov cuam tshuam daws teeb meem. Raws li kev sib txheeb ntawm cov nqi hloov ntawm ob peb xyoos dhau los, kev sib txheeb ntawm ob qho yog ntau dua 82%, uas yog rau tus neeg sib txheeb. Yog li ntawd, tus nqi hloov pauv ntawm MMA yuav ua rau tus nqi PMMA nyob rau tib qho kev coj ua.