Hauv Suav lag luam, cov txheej txheem tsim khoom ntawm MMA tau tsim rau ze li ntawm rau hom, thiab cov txheej txheem no tau ua tiav tag nrho.Txawm li cas los xij, qhov kev sib tw ntawm MMA sib txawv heev ntawm cov txheej txheem sib txawv.

Tam sim no, muaj peb txoj kev tsim khoom tseem ceeb rau MMA:

Acetone cyanohydrin method (ACH method): Qhov no yog ib qho ntawm cov txheej txheem tsim khoom ua ntej tshaj plaws, nrog cov cuab yeej paub tab thiab ua haujlwm yooj yim.

Ethylene carbonylation method: Qhov no yog cov txheej txheem tsim khoom tshiab nrog cov tshuaj tiv thaiv siab thiab cov khoom zoo.

Isobutene oxidation method (C4 method): Qhov no yog cov txheej txheem tsim khoom raws li oxidative dehydrogenation ntawm butene, nrog cov khoom siv raw yooj yim thiab cov nqi qis.

Raws li ntawm peb cov txheej txheem no, muaj peb qhov kev txhim kho ntau lawm raws li hauv qab no:

Txhim kho ACH txoj kev: Los ntawm kev ua kom zoo dua cov tshuaj tiv thaiv thiab cov khoom siv, cov khoom lag luam thiab cov khoom lag luam zoo tau txhim kho.

Ice acetic acid txoj kev: Cov txheej txheem no siv cov dej khov acetic acid ua cov khoom siv raw, thiab tsis muaj qhov tso tawm ntawm peb qhov pov tseg thaum lub sijhawm tsim khoom, ua rau nws tus phooj ywg zoo.

BASF thiab Lucite cov txheej txheem, sawv cev feem ntau los ntawm lub npe ntawm lub tuam txhab, tau dhau los ua kev txhim kho thev naus laus zis tshwj xeeb raws li cov yam ntxwv ntawm lawv cov lag luam, nrog rau qhov tshwj xeeb thiab kev sib tw zoo.

Tam sim no, cov txheej txheem rau kev tsim khoom no tau ua tiav tag nrho cov khoom tsim nrog cov nplai ntawm 10000 tons lossis ntau dua hauv Suav teb.Txawm li cas los xij, kev sib tw ntawm cov txheej txheem sib txawv txawv heev vim muaj ntau yam xws li lawv tus kheej cov yam ntxwv thiab cov nqi.Nyob rau hauv lub neej yav tom ntej, nrog rau kev nce qib ntawm technology thiab kev lag luam kev loj hlob, kev sib tw toj roob hauv pes ntawm cov txheej txheem ntau lawm yuav hloov.

Nyob rau tib lub sijhawm, nws yog ib qho tseem ceeb uas yuav tsum tau hais tias nyob rau lub Cuaj Hli 2022, qhov chaw ua qauv qhia kev lag luam ntawm 10000 tuj thee raws li methanol acetic acid rau methyl methacrylate (MMA) txoj haujlwm ntawm nws tus kheej tsim los ntawm Lub Tsev Haujlwm ntawm Txheej Txheem Engineering ntawm Suav Academy ntawm Kev Tshawb Fawb yog ua tiav pib thiab ua haujlwm ruaj khov, thiab cov khoom tau ua raws li tus qauv.Cov cuab yeej no yog lub ntiaj teb thawj cov thee raws li methanol acetic acid rau MMA cov khoom ua qauv qhia kev lag luam, ua tiav kev hloov pauv ntawm cov khoom siv hauv tsev methyl methacrylate los ntawm kev cia siab rau cov khoom siv roj av rau kev siv cov khoom siv roj av.

Vim qhov kev hloov pauv ntawm kev sib tw toj roob hauv pes, cov khoom siv thiab kev xav tau ib puag ncig ntawm MMA cov khoom tau hloov pauv, thiab tus nqi sib txawv qhia qhov kev hloov pauv nqaim.Hauv ob xyoos dhau los, tus nqi lag luam siab tshaj plaws ntawm MMA hauv Suav teb tau mus txog 14014 yuan / tuj, thiab tus nqi qis tshaj yog kwv yees li 10000 yuan / tuj.Raws li lub Yim Hli 2023, MMA tus nqi lag luam tau nqis mus rau 11500 yuan / tuj.Tus neeg sawv cev tseem ceeb ntawm cov khoom lag luam qis qis yog PMMA, uas tau pom qhov tsis muaj zog ntawm cov nqi lag luam hauv ob xyoos dhau los, nrog tus nqi siab tshaj plaws ntawm 17560 yuan / tuj thiab tus nqi qis kawg ntawm 14625 yuan / tuj.Raws li lub Yim Hli 2023, tus nqi tseem ceeb ntawm Suav PMMA kev lag luam hloov pauv ntawm 14600 yuan / ton.Nws yuav tsum tau muab sau tseg tias vim lub fact tias domestic PMMA cov khoom yog feem ntau ntawm ib nrab mus rau qis-kawg hom, tus nqi ntawm cov khoom yog qis dua li ntawm lub khw muag khoom.

1.Yog tsis xav txog acetic acid MMA chav tsev, ethylene MMA txheej txheem ntau lawm tau muaj kev sib tw muaj zog tshaj plaws hauv ob xyoos dhau los.

Hauv ob xyoos dhau los, ethylene raws li MMA txheej txheem ntau lawm muaj kev sib tw muaj zog tshaj plaws hauv Suav lag luam.Raws li kev txheeb cais, tus nqi tsim khoom ntawm ethylene raws li MMA yog qhov qis tshaj plaws thiab nws qhov kev sib tw yog qhov muaj zog tshaj plaws.Xyoo 2020, tus nqi theoretical ntawm ethylene raws li MMA yog 5530 yuan ib tuj, thaum lub Ib Hlis Ntuj xyoo 2023, tus nqi nruab nrab tsuas yog 6088 yuan ib tuj.Hauv qhov sib piv, BASF txoj kev muaj tus nqi ntau tshaj plaws, nrog rau MMA tus nqi ntawm 10765 yuan ib tuj hauv 2020 thiab tus nqi nruab nrab ntawm 11081 yuan ib tuj txij lub Ib Hlis mus txog Lub Yim Hli 2023.

Thaum ntsuas qhov kev sib tw ntawm cov txheej txheem ntau lawm, peb yuav tsum tau them sai sai rau qhov sib txawv ntawm cov khoom siv raw rau cov txheej txheem sib txawv.Piv txwv li, cov khoom siv raw ntawm txoj kev ethylene yog 0.35 ethylene, 0.84 methanol, thiab 0.38 synthesis gas, thaum txoj kev BASF yog ib qho tseem ceeb ntawm ethylene, tab sis nws cov ethylene noj yog 0.429, methanol noj yog 0.387, thiab synthesis roj noj yog 662 kub.Cov kev sib txawv no cuam tshuam rau cov nqi tsim khoom thiab kev sib tw ntawm cov txheej txheem sib txawv.

Raws li tus nqi kwv yees nyob rau ob peb xyoos dhau los, qhov qeb duas ntawm MMA kev sib tw rau cov txheej txheem sib txawv yog: ethylene txoj kev> C4 txoj kev> txhim kho ACH txoj kev> ACH txoj kev> Lucite txoj kev> BASF txoj kev.Qhov qeb duas no feem ntau cuam tshuam los ntawm qhov sib txawv hauv pej xeem engineering ntawm cov txheej txheem sib txawv.

Nyob rau hauv lub neej yav tom ntej, nrog rau kev nce qib ntawm technology thiab kev lag luam kev loj hlob, kev sib tw toj roob hauv pes ntawm cov txheej txheem sib txawv yuav hloov.Tshwj xeeb tshaj yog tsis xav txog cov acetic acid MMA ntaus ntawv, ethylene MMA yuav tsum tau txuas ntxiv tswj nws cov kev sib tw kom zoo dua.

2.Txoj kev Acetic acid MMA yuav tsum dhau los ua txoj kev sib tw ntau tshaj plaws

Lub koom haum ntawm txheej txheem Engineering ntawm Suav Academy ntawm Sciences tau ntse tsim lub ntiaj teb thawj thee raws li methanol acetic acid MMA kev lag luam ua qauv cog.Cov nroj tsuag siv cov tshuaj methanol thiab acetic acid ua cov khoom siv raw, thiab los ntawm cov txheej txheem ntawm aldol condensation, hydrogenation, thiab lwm yam, paub txog kev ruaj khov mus ntev ntawm MMA cov khoom.Cov txheej txheem no muaj kev vam meej, tsis tsuas yog cov txheej txheem luv luv xwb, tab sis kuj yog cov khoom siv raw los ntawm cov thee, uas muaj cov txiaj ntsig zoo.Tsis tas li ntawd, Xinjiang Zhongyou Puhui Technology Co., Ltd. tab tom npaj ib qho kev lag luam loj ntawm 110000 tons / xyoo, uas yuav txhawb nqa kev txhim kho thiab kev loj hlob ntawm Tuam Tshoj txoj kev lag luam MMA.Muab piv nrog cov txheej txheem roj av raws li MMA cov txheej txheem, cov txheej txheem acetic acid raws li MMA yog ib puag ncig tus phooj ywg thiab kev lag luam zoo, thiab xav tias yuav dhau los ua qhov tseem ceeb hauv kev txhim kho kev lag luam MMA yav tom ntej.

3.Muaj qhov sib txawv tseem ceeb ntawm tus nqi cuam tshuam qhov hnyav ntawm cov txheej txheem sib txawv

Muaj qhov sib txawv tseem ceeb ntawm tus nqi cuam tshuam qhov hnyav ntawm cov txheej txheem MMA sib txawv, thiab qhov cuam tshuam qhov hnyav ntawm qhov sib txawv ntawm cov nqi sib txawv nyob ntawm cov txheej txheem thev naus laus zis.

Rau ACH MMA, tus nqi hloov pauv ntawm acetone, methanol, thiab acrylonitrile muaj feem cuam tshuam rau nws cov nqi.Ntawm lawv, tus nqi hloov pauv ntawm acetone muaj qhov cuam tshuam loj tshaj plaws ntawm cov nqi, mus txog 26%, thaum cov nqi hloov pauv ntawm methanol thiab acrylonitrile cuam tshuam txog 57% thiab 18% ntawm cov nqi, feem.Hauv qhov sib piv, tus nqi ntawm methanol tsuas yog kwv yees li 7%.Yog li ntawd, nyob rau hauv txoj kev tshawb no ntawm tus nqi saw ntawm ACH MMA, yuav tsum tau saib xyuas ntau dua rau cov nqi hloov ntawm acetone.

Rau C4 txoj kev MMA, high-purity isobutylene yog tus nqi sib txawv loj tshaj plaws, suav txog kwv yees li 58% ntawm MMA tus nqi.Methanol suav txog kwv yees li 6% ntawm MMA tus nqi.Tus nqi hloov pauv ntawm isobutene muaj feem cuam tshuam rau tus nqi ntawm C4 txoj kev MMA.

Rau ethylene raws li MMA, chav tsev noj ethylene tso nyiaj ntau dua 85% ntawm MMA tus nqi ntawm cov txheej txheem no, uas yog tus nqi tseem ceeb.Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias feem ntau ntawm cov ethylene yog tsim los ntawm tus kheej tsim cov khoom txhawb nqa, thiab kev sib haum xeeb sab hauv feem ntau yog raws li tus nqi sib hais.Yog li ntawd, theoretical kev sib tw theem ntawm ethylene yuav tsis siab npaum li qhov tseeb kev sib tw.

Hauv cov ntsiab lus, muaj qhov sib txawv tseem ceeb ntawm qhov hnyav ntawm qhov sib txawv ntawm cov nqi ntawm cov txheej txheem MMA sib txawv, thiab kev tshuaj xyuas yuav tsum tau ua raws li cov txheej txheem tshwj xeeb.

4.Cov txheej txheem tsim MMA twg yuav muaj tus nqi qis tshaj yav tom ntej?

Raws li cov txheej txheem thev naus laus zis tam sim no, qib kev sib tw ntawm MMA hauv cov txheej txheem sib txawv yav tom ntej yuav cuam tshuam loj heev los ntawm kev hloov pauv ntawm cov khoom siv raw khoom.Cov khoom siv raw siv hauv ntau cov txheej txheem MMA tseem ceeb suav nrog MTBE, methanol, acetone, sulfuric acid, thiab ethylene.Cov khoom no tuaj yeem yuav lossis muab nkag rau sab hauv, thaum cov roj hluavtaws, cov khoom siv hluav taws xob thiab cov khoom siv pabcuam, hydrocyanic acid, crude hydrogen, thiab lwm yam yog defaulted los muab nws tus kheej thiab tus nqi tseem tsis hloov.

Ntawm lawv, tus nqi ntawm MTBE feem ntau ua raws li cov kev hloov pauv ntawm cov roj refined lag luam, thiab cov nqi roj refined yog ze ze rau tus nqi ntawm cov roj crude.Nyob rau ntawm qhov chaw ntawm qhov kev pom zoo rau yav tom ntej cov nqi roj, MTBE cov nqi kuj tseem xav tias yuav nthuav tawm qhov kev nce siab, thiab qhov kev cia siab nce siab yuav muaj zog dua cov roj crude.Tus nqi ntawm methanol hauv kev ua lag luam hloov pauv nrog cov qauv ntawm cov nqi hluav taws xob, thiab cov khoom siv yav tom ntej yuav tsum tau nce ntxiv.Txawm li cas los xij, txoj kev loj hlob ntawm cov qauv kev lag luam yuav ua rau muaj kev nce hauv kev siv tus kheej qis, thiab tus nqi ntawm cov khoom methanol hauv kev ua lag luam yuav tsum tau nce mus ntxiv.

Cov khoom siv thiab kev xav tau ib puag ncig hauv kev ua lag luam acetone yog qhov tsis zoo, thiab kev tsim kho cov haujlwm tshiab uas siv ACH txoj kev raug cuam tshuam, thiab cov nqi mus sij hawm ntev yuav tsis muaj zog.Ethylene feem ntau muab nkag rau sab hauv thiab muaj kev sib tw nqi zog.

Yog li ntawd, raws li cov txheej txheem thev naus laus zis tam sim no thiab qhov hloov pauv ntawm tus nqi ntawm cov khoom siv raw, tseem muaj qee qhov tsis paub meej txog qhov twg MMA cov txheej txheem yuav muaj tus nqi qis tshaj yav tom ntej.Txawm li cas los xij, nws tuaj yeem pom tau tias nyob rau hauv cov ntsiab lus ntawm yav tom ntej roj thiab cov nqi hluav taws xob nce, cov nqi ntawm cov khoom siv raw xws li methanol thiab MTBE kuj tseem xav tias yuav nce siab, uas yuav muaj kev cuam tshuam loj rau qib kev sib tw ntawm MMA hauv cov txheej txheem sib txawv.Txhawm rau kom muaj kev sib tw, cov tuam txhab lag luam yuav tsum nrhiav kev lag luam ntau dua thiab cov khoom siv raw khoom zoo, thaum ntxiv dag zog rau kev ua kom zoo thiab kev tsim kho tshiab ntawm cov txheej txheem tsim khoom los txo cov nqi tsim khoom thiab txhim kho cov khoom zoo.

Cov ntsiab lus

Kev sib tw ntawm cov txheej txheem MMA sib txawv hauv Suav teb yav tom ntej yuav tsum muaj zog ntxiv rau cov txheej txheem ethylene, ua raws li cov txheej txheem ACH txhawb nqa acrylonitrile chav tsev, thiab tom qab ntawd cov txheej txheem C4.Txawm li cas los xij, nws yuav tsum raug sau tseg tias yav tom ntej, cov tuam txhab lag luam yuav txhim kho hauv cov qauv kev lag luam, uas yuav yog qhov kev sib tw tshaj plaws ntawm kev ua haujlwm los ntawm cov khoom lag luam qis thiab qis qis txhawb PMMA lossis lwm yam khoom siv tshuaj.

Yog vim li cas vim li cas txoj kev ethylene yuav tsum nyob twj ywm muaj zog yog vim muaj zog ntawm nws cov khoom siv raw ethylene, uas suav nrog feem ntau ntawm MMA cov nqi tsim khoom.Txawm li cas los xij, nws yuav tsum tau taw qhia tias feem ntau ethylene tau muab nkag rau hauv, thiab nws qhov kev sib tw theoretical theem yuav tsis siab npaum li qhov kev sib tw tiag tiag.

ACH txoj kev muaj kev sib tw muaj zog thaum ua ke nrog acrylonitrile chav tsev, feem ntau vim tias high-purity isobutylene raws li cov khoom siv tseem ceeb suav rau feem ntau ntawm MMA cov nqi, thaum ACH txoj kev tuaj yeem tsim cov isobutylene high-purity isobutylene raws li cov khoom lag luam, yog li txo cov nqi. .

Kev sib tw ntawm cov txheej txheem xws li C4 txoj kev yog qhov tsis muaj zog, feem ntau yog vim qhov kev hloov pauv ntawm tus nqi tseem ceeb ntawm nws cov khoom siv raw isobutane thiab acrylonitrile, thiab cov feem tsawg ntawm isobutane hauv MMA cov nqi tsim khoom.

Zuag qhia tag nrho, kev sib tw ua haujlwm tshaj plaws ntawm MMA kev lag luam saw tom ntej yuav yog rau cov lag luam los txhim kho hauv cov qauv kev lag luam, los ntawm cov khoom lag luam qis thiab qis qis txhawb PMMA lossis lwm yam khoom siv tshuaj.Qhov no tuaj yeem tsis tsuas yog txo cov nqi tsim khoom thiab txhim kho cov khoom sib tw, tab sis kuj zoo dua raws li kev lag luam xav tau.