Methyl Methacrylate (MMA) ndi mankhwala ofunikira opangira zida, makamaka popanga galasi la organic, ma crykic. ndi zinthu zolimbitsa thupi kwambiri kwa Awesmeace Zambiri, fiberi yopenga, mabotiki ndi minda ina.

Monga monomer, mma amagwiritsidwa ntchito makamaka popanga polymethyl methacrylate (nthawi zambiri amadziwika kuti ndi zinthu zina, komanso zopanga polyvinyl (PVC) ) Zowonjezera ma acr, a Mbs ndipo ngati wowoneka wachiwiri mu kupanga ma acslits.

Pakadali pano pali mitundu itatu ya machitidwe okhwima a MMA kunyumba ndi kunja: Mitsukone Centery Njira ya Basf ndi njira ya Lucite alpha.

1, methacrylamide hydrolysing njira yolakwika
Njira iyi ndi njira yopanga mmalo, kuphatikiza njira ya acetone ya menohydrin ndi njira yomwe ya Methacrylonile, itatha njira yonse ya methacrylamide yapakatikati hydrolysis, kapangidwe kake ka MMA.

(1) Njira ya Acetune Cyanohydrin (njira ya ACH)

Njira ya ACH, idayamba kupangidwa ndi Lucite Ife, ndiye njira yoyambirira yopanga mafakitale ya mafakitale, ndipo ilinso njira yayikulu yopanga Mma. Njirayi imagwiritsa ntchito acetone, hydrocyunic acid, sulfuric acid ndi methanol ngati zida zophika, ndipo zomwe zimachitika zimaphatikizapo:

Njira ya a ap ndiyokhwima, koma ali ndi zovuta zotsatirazi:

○ Kugwiritsa ntchito kwambiri poizoni Hydrocnic acid, komwe kumafuna njira zotetezera motchinga panthawi yosungirako, mayendedwe ndi ogwiritsa ntchito;

○ Kupanga kuchuluka kwa acid acid Gwero la kuipitsidwa kwa chilengedwe;

o Chifukwa cha kugwiritsa ntchito sulfuric acid, zida zotsutsana ndi zonyansa zimafunikira, ndipo zomanga za chipangizocho ndiokwera mtengo.

(2) Njira ya Methacrylonile (njira ya munthu)

Asahi Kasesi wapanga njira ya methacrylonile (munthu) potengera njira ya ach, mwachitsanzo, Irobutlene kapena Trut-Iroburdy wapeza munthu wa sulucrylamide, omwe amakumana ndi sulfurdic acid ndi methanol kuti apange Mma. Njira ya munthuyo imaphatikizapo ma okomanation a ammoams, zomwe zimachitika mkati mwazinthu zomwe zimachitika komanso nkhata zambiri za chomera cha ach. Kuchita kwa Hydrolysis kumagwiritsa ntchito sulfuric acid, ndipo zokolola za methacrylamide ili pafupifupi 100%. Komabe, njirayi ili ndi toxicy hydrocyonic acid ndi zinthu, hydrocyonic acid ndi sulfuric acid ndizachilengedwe kwambiri, zipangizo zomwe zimachitika ndizokwera kwambiri, pomwe ziwopsezo zachilengedwe ndizokwera kwambiri.

2, iSocutyylene oxidation
Maxidation a Inocutyylene adakhala njira yoyeserera yamakampani akulu padziko lapansi chifukwa cha mphamvu yake yayitali komanso kuteteza chilengedwe, koma Japan yokhayo inali yayitali ukadaulo padziko lapansi ndikutseka ukadaulo ku China. Njira imaphatikizanso mitundu iwiri ya Mitsubishi Njira ndi Asahi Kaseri.

(1) Mitsubishi Njira (isosunutylene katatu)

Mitsubishi ya ku Japan's Mitsun's Mitsubishi ya ku Japan adapanga njira yatsopano kuti apange MMA kuchokera ku Isosutchlene, masheya awiri osankhidwa acid ndi methanol. Pambuyo poti mafakitale a Mitsubishi Rayon, Japan Asahi Kaseri Company, kampani ya ku Korea ya Korea, Korea Lucky Company, adazindikira wina. Kampani ya Hunghai Hunghai Hunghai adalemba ndalama zambiri, zachuma, ndipo zitakhala zaka 15 zopitilira muyeso komanso zopitilira 15, zidasinthiratu makutidwe ndi maxidations awiri a imobutlene oyeretsa mma a Inobutlene, ndipo mu Disembala 2017 , idatsirizidwa ndikugwira ntchito yopanga mafakitale a 50,000, yomwe ili ndi kampani yolumikizira HAAAang, Shandong, ndikuphwanya ukadaulo wokha ndi ukadaulo uwu ku China. Tekinoloje, kuphatikiza china dziko lachiwiri kukhala ndiukadaulo wotukuka chifukwa chopanga Maa ndi MMA ndi oxidation ya Isosutlene.

.

Asani Kaseti Corporation yakhala ikuchitika kale pakukula kwa njira yachidule yopanga mma, yomwe idapangidwa bwino ndikuyamba kugwira ntchito mu 1959 Njira yaukadaulo imakhala ndi kanthu katatu, mwachitsanzo, oxidation wa isobutlene kapena Trut-Ber-Bioni mu gawo la Oxacroite Oxide kuti apange methacrolein (mal) Gawo lamadzimalo pansi pa chogwirira cha PD-PB chothandizira kupanga MMA mwachindunji, komwe kuli maxichi Njira ya Asaahi Kaseri ndi yosavuta, ndi njira ziwiri zokha zomwe zimachitika ndi madzi okha monga chopangidwa ndi zobiriwira komanso zachilengedwe. Amanenedwa kuti cholembera cha Asahi Kuseti chakonzedwa kuchokera m'badwo woyamba wa PD-PB kupita ku mbadwo watsopano wa AU-NI.

Pambuyo pa ukadaulo wa Asahi Kasesi Technology, kuyambira 2003 mpaka 2008, mabungwe angapo akunyumba adayamba kufufuza Boom Pa chitukuko ndi kusintha kwa mphaka za PD-PB, pambuyo pa 2015, kafukufuku wapanyumba pa Au-Ni Cources adayamba kuzungulira, Phunziro laling'ono loyendetsa ndege, lomwe linamaliza kukhathamiritsa kwa Nano-Golide Wokonzekera, Kukonzekera Kukonzanso Kukweza Kwakutali Kwa Kutalika Kwakutali, ndipo tsopano likugwirizana ndi mabizinesi opanga mafakitale.

3, ethylene carbonyl synthesis Rou
Tekinoloje ya ethylene carbonyl synthesis provirring imaphatikizapo njira ya basf ndi ethylene-acid acid estery.

.

Njirayi ili ndi masitepe anayi: Ethylene ndi Hydroformacky kuti mupeze pro prouvildehyde zopangidwa ndi mal methanol. Zomwe zimachita ndi gawo lofunikira. Njirayi imafunikira masitepe anayi, omwe ndi osavuta ndipo amafuna zida zapamwamba komanso mtengo wapamwamba kwambiri, pomwe phindu ndi mtengo wotsika wa zinthu zopangira.

Zowonjezereka Zam'nyumba zapangidwanso m'mabuku a Ethylene-formalyehyde kamnthetsis ya MMA. 2017, Shanghai Huayi Group Company, in cooperation with Nanjing NOAO New Materials Company and Tianjin University, completed a pilot test of 1,000 tons of propylene-formaldehyde condensation with formaldehyde to methacrolein and the development of a process package for a 90,000-ton industrial plant. Kuphatikiza apo, Institute of Project Injini ya Chitchaina Cha Sayansi, mogwirizana ndi gulu la Henan Mphamvu ndi Gulu la Mankhwala, kumaliza ntchito 1,000-zomera zokha ndikupeza bwino ntchito yokhazikika mu 2018.

.

Mitundu ya Lucite Proceogwiritsa ntchito yofatsa ndi yofatsa, yonyamula katundu ndi mtengo wobiriwira ndizosavuta kuchita zazikulu, ndipo pamlingo umodzi umangowongolera ukadaulo uwu padziko lapansi ndipo sichoncho anasamukira kudziko lakunja.

Njira ya alpha imagawika mbali ziwiri:

Gawo loyamba ndikuchita kwa Ethylene ndi counhanol kutulutsa methyl propoti

Kugwiritsa ntchito chothandizira chopondera cha Palladium osokoneza bongo ;

Gawo lachiwiri ndikuchita kwa methyl pro proprieate ndi formaldehyde kuti apange MMA

Chothandizira cholumikizira chambiri chimagwiritsidwa ntchito, chomwe chili ndi kusankha kwakukulu kwa MMA. M'zaka zaposachedwa, mabizinesi apakhomo adagwira nawo chidwi chachikulu muukadaulo wa Methyl Proponse ndi formaldehyde kuvomerezedwa ndi mayi chothandizira, koma moyo wosagwiritsidwa ntchito sudafike pofunafuna mafakitale ntchito.