Methyl methacrylate (MMA) yog ib qho tseem ceeb organic cov khoom siv, moulding monomer, thiab lwm yam khoom siv high-end-ender rau aerospace, hauv tshuab hluav taws xob Cov ntaub ntawv, kho qhov muag siv roj, hlauics thiab lwm thaj teb.

Raws li cov ntaub ntawv monomer, MMA feem ntau yog siv nyob rau hauv kev tsim cov polymethylized nrog lwm cov khoom siv vinyminelate (xws li tsim cov polyvinyl chloride (PVC ) Ntxiv Ac, MBS thiab raws li ib pliag monomer hauv kev tsim cov acrylics.

Tam sim no, muaj peb hom kev paub tab rau kev tsim cov MMA nyob hauv tsev thiab txawv teb chaws txheej txheem (MethouBishi cov txheej txheem) thiab ethylene bity) thiab ethylene carbonyl synthesis txoj kev ( Basf txoj kev thiab Lucite Alpha Txoj Kev).

1, MetharryLabide Hydrolysis Esterification Txoj Kev
Txoj kev no yog cov tsoos MMA ntau lawm hom, suav nrog acetone cyetone cov qauv, ob qho tib si methamrylonidrile hydriav thiab Esterification synthesis ntawm MMA.

(1) acetone cyanohydrin hom (ach txoj kev)

Txoj kev Ach, thawj zaug tsim los ntawm Asmeskas cov qauv ntawm MMA, yog cov txheej txheem ntau tshaj plaws hauv lub ntiaj teb. Cov qauv no siv acetone, hydrocyanic acid, thiab methanol ua cov khoom siv raw xws li, thiab cov tshuaj tiv thaiv raw, kev pom zoo thiab cov tshuaj tiv thaiv hydrourical.

ACH txheej txheem yog technically loj, tab sis muaj cov hauv qab no qhov tsis zoo:

○ Kev siv ntawm hydrocyanic acid, uas yuav tsum tau tiv thaiv kev tiv thaiv nruj thaum lub sijhawm tsheb thauj khoom thiab siv;

○ los ntawm kev tsim khoom ntawm cov roj acid uas muaj cov txiv ntoo uas muaj cov edulfic acid thiab a ~ 3.5 zaug uas yog MMA, thiab yog ib qho loj heev qhov chaw ntawm ib puag ncig kev nyab xeeb;

o Vim tias siv cov sulfuric acid, tiv thaiv cov cuab yeej ua kom tsis taus, thiab kev tsim kho ntawm cov cuab yeej kim.

(2) metharumrylonitrile txoj kev (txiv neej txoj kev)

Asahi Kasei tau tsim cov metharacryloniturile (tus txiv neej) ua rau cov neeg me, uas yog cov txiv neej ua haujlwm, uas nyiam ua cov txiv neej thiab cov sulfuric acid thiab methanol los tsim MMA. Tus txiv neej txoj kev suav nrog ammonia oxidation kev tawm tsam, kev tawm tsam thiab cov tshuaj tiv thaiv hydrourysistification, thiab tuaj yeem siv cov khoom siv ntawm ACH feem ntau. Cov tshuaj tiv thaiv hydrolysis siv ntau dhau sulfuric acid, thiab cov txiaj ntsig ntawm cov metriat methlacrylamide yog yuav luag 100%. Txawm li cas los xij, tus qauv tau muaj kuab lom hydrocyanic acid los ntawm cov khoom lag luam, cov khoom siv sullocyanic yog cov khoom txaus siab heev, thaum cov kev phom sij ib puag ncig muaj kev phom sij.

2, Isobutylene oxidation txoj kev
Isobutylene oxidation tau nyiam cov thev naus laus zis tshiab rau cov tuam txhab loj hauv ntiaj teb no, tab sis tsuas yog Nyiv ib puag ncig yog qhov siab thev naus laus zis thiab tsuas yog Nyiv ib puag ntej muaj kev thev naus laus zis thiab tsis muaj cuab yeej cuab tam Cov qauv suav nrog ob hom Mitsubishi thiab Asahi Kasei txheej txheem.

(1) cov txheej txheem (isobutylene peb-kauj ruam txoj kev)

Nyiv khawm tus txheej txheem tshiab los tsim cov mmingylene lossis tert-butanol ua cov mab me me acid (maa), thiab tom qab ntawd ua haujlwm nrog methanol. Tom qab muaj kev lag luam ntawm Mitsubishi Rayon, Nyiv Asahi Kusi tuam txhab, Nyiv Kyoto Monomer Company, Kauslim muaj txiaj ntsig, thiab lwm yam. Lub tsev Shanghai Huayi Huayi pab pawg tau nqis peev ntau ua rau muaj ob txoj kev siv nyiaj txiag, thiab tom qab 15 xyoo , nws ua tiav thiab muab tso rau hauv kev ua haujlwm 50,000-tuj ntawm muaj kev cog lus hauv nws txoj kev sib koom ua ke lub tuam txhab Tshuab, tseem ua Tuam Tshoj lub teb chaws thib ob kom muaj cov thev naus laus zis rau kev tsim cov MAA thiab MMA los ntawm oxidation ntawm isobutylene.

(2) Asahi Kasei txheej txheem (Isobutylene ob-kauj ruam txheej txheem)

Nyiv lub tuam txhab Ashai Kasei Lub tuam txhab ntev tau cog lus rau kev txhim kho cov kev lag luam esericalfulation thiab muab tso rau hauv 1999 muaj cov nroj tsuag 60,000 nrog rau kev tsim tawm hauv Kawasaki, Nyiv, thiab tom qab ntawd thiab tom qab tons. Cov txheej txheem txuj ci muaj ob kauj ruam, piv txwv li oxidation ntawm isobutylene lossis tert-butalite oxide cature oxide nyob rau hauv qhov kev txiav txim siab ntawm MroSacrolein (Mal), ua raws li cov tshuaj Axidation Oxidative ntawm mal nyob rau hauv lub Ua kua theem nyob rau hauv qhov kev txiav txim ntawm PD-PB catalyst los tsim mmA ncaj qha, qhov tseem ceeb ntawm Oxididatification ntawm cov kauj ruam no los tsim mmA. Lub Asahi Kase Linesi Txheej Txheej yog yooj yim, nrog tsuas yog ob kauj ruam ntawm cov tshuaj tiv thaiv thiab tsuas yog cov khoom siv, tab sis tus qauv tsim thiab npaj ntawm catalyst yog qhov xav tau heev. Nws tau tshaj tawm tias Asahi Kasei's esterification Etregred tau txhim kho los ntawm thawj tiam ntawm PD-PB rau lub cim tshiab ntawm AU-ni catalyst.

Tom qab kev lag luam ntawm Asahi Kasei Technology, los ntawm 2003 txog xyoo 2003 mus rau cov txheej txheem tshawb fawb, Tianjin University thiab Harbin Engineering University nthuav qhia ntawm kev txhim kho thiab txhim kho pd-pb catalysts, thiab lwm yam tom qab xyoo 2015, tus sawv cev hauv tsev, Suav Academy of Sciences, tau ua tiav kev nce qib hauv Kev kawm me me, ua tiav cov kev ua kom zoo ntawm nano-kub catalyst kev ntsuas, thiab tam sim no tau koom tes nrog kev lag luam los tsim cov thev naus laus zis.

3, Ethylene CarbonyL Synthesis txoj kev
Cov thev naus laus zis ntawm ethylene kev lag luam nrog cov kev lag luam hluav taws xob suav nrog Basf txheej txheem thiab ethylene-prodom metyl ester txheej txheem.

(1) ethylene-prodic acid txujci (Basf txheej txheem)

Cov txheej txheem muaj plaub kauj ruam: ethylene yog hydroformylation kom tau txais cov tub rog tub rog, thiab Maa sib cais thiab ua kom huv los tsim MMA los ntawm Esterification nrog Methanol. Cov tshuaj tiv thaiv yog cov kauj ruam tseem ceeb. Cov txheej txheem yuav tsum tau plaub kauj ruam, uas yog qhov tseem ceeb thiab yuav tsum tau siv cov khoom siv siab thiab muaj txiaj ntsig siab yog tus nqi qis ntawm cov khoom nyoos.

Kev tawg hauv tsev kuj tau ua hauv kev txhim kho thev naus laus zis ntawm ethylene-propylene-formaldehyde synthesis ntawm MMA. 2017, Shanghai Huayi Group tuam txhab, hauv kev koom tes nrog cov khoom siv hluav taws xob uas tsim nyog nrog rau methots-filcorehyde Ib qho ntxiv, lub koom haum ntawm cov txheej txheem ntawm Suav Academences ntawm Kev Tshawb Fawb, ua tiav ib pawg neeg muaj zog thiab ua tiav tau ua haujlwm ruaj khov xyoo 2018.

(2) Kethylene-Methylene Processionate Txheej txheem (Lucite Alpha Txheej Txheem)

Lucite alpha txheej txheem kev ua haujlwm yog qhov ua haujlwm me, cov nqi khoom siv raw yooj yim, thiab cov khoom siv raw yooj yim, thiab cov khoom siv Raw yooj yim, thiab cov khoom siv Raw yooj yim, thiab cov khoom siv Raw yooj yim, thiab cov khoom siv Raw yooj yim, thiab cov khoom siv Raw yooj yim, thiab cov khoom siv Raw yooj yim, thiab cov khoom siv Raw yooj yim dua, pauv mus rau sab nraud ntiaj teb.

Cov txheej txheem alpha tau muab faib ua ob kauj ruam:

Thawj kauj ruam yog cov tshuaj tiv thaiv ntawm ethylene nrog Co thiab Methanol los tsim cov methyl propionate

Siv Palladium-based homogeneous carbonyst, uas muaj cov yam ntxwv ntawm kev ua haujlwm siab, muaj kev cuam tshuam nrog cov khoom siv me me, thiab ua haujlwm ntev dua rau cov khoom siv thiab txo cov kev tsim kho peev ;

Qhov thib ob kauj ruam yog qhov tshuaj tiv thaiv ntawm methyl propionate nrog formaldehyde los ua mma

Cov tswv cuab ntawm ntau-theem catalyst yog siv, uas muaj MMA xaiv siab. Nyob rau hauv xyoo tsis ntev los no, kev lag luam hauv tsev tau nqis peev ntau ntawm kev txhim kho MINAYSYSS thiab tsau lub neej tsis tau mus txog kev lag luam Cov ntawv thov.