Methyl Methacrylate (MMA) ndi mankhwala opangidwa ndi orden, makamaka popanga galasi la organic, etc. ndi zinthu zolimbitsa thupi, firtics ndi minda ina.

Monga monomer, mma amagwiritsidwa ntchito makamaka popanga polymethyl methacrylate (ma pvCiglass, monganso owonjezera, kapena ngati monomer yachiwiri popanga ma acry.

Pakadali pano pali mitundu itatu yokhwima yopanga mma kunyumba ndi kunja: Mitsucdene Center Protete (Mocebane Caser Njira) Njira).

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 (matenda am'madzi ndi sulfuric acid ndi a amonium bisuulfate ngati zinthu zazikulu), kuchuluka kwake kalikonse ka.

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 apanga njira yomwe methacrylonile (yamunthu) yotengera njira ya ach, ie, istobutylene acid ndi Amosunol acita acid, omwe amakumana ndi sulumbol 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 za anthu komanso zaka 15, ndipo zitakhala zopitilira 15 zopitilira payekha, ndipo mu Disembala la Inosutch Ili mu Heze, chigawo cha Shandong, kuswa ukadaulo monopoly of Japan ndikukhala kampani iyi ndi ukadaulo uwu ku China. Tekinoloje, kuphatikiza china dziko lachiwiri kukhala ndiukadaulo wotukuka chifukwa chopanga Maa ndi MMA ndi oxidation ya Isosutlene.

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Asani Kaseti Corporation yakhala ikuchitika kale pakukula kwa njira yachidule yopanga mma, yomwe idapangidwa bwino ndikuyamba kugwira ntchito mu 1959 Njira yaukadaulo imakhala ndi chochita ziwiri, mwachitsanzo, makutidwe a isobutlene a Indisley Pangani MMA. 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 Tekinoloje, kuyambira 2003 mpaka 2008, mabungwe angapo akunja adayamba kuwerengera kwa ST-PB Za Boom, woimira wa ku Dalianian Institute of Tecrineentry Engineent, wachitapo kanthu kopitilira muyeso wa Nano-Gold-Gold

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

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Njirayi ili ndi masitepe anayi: Ethylene ndi hydroformacky kuti mupeze pro prouvildehyde zopangidwa ndi mal 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.

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Mitundu ya Lucite Proceo yogwira ntchito ndi yofatsa, yokolola ndi yophukira ndi mtengo wobiriwira ndizosavuta kuchita zazikulu, ndipo kuchuluka kwa gawo limodzi ndilosamutsira kwaukadaulo uwu padziko lapansi ndipo sakusamutsidwa kudziko lina.

Njira ya alpha imagawika mbali ziwiri:

Gawo loyamba ndikuchita kwa Ethylene ndi counhanol kutulutsa methyl propoti

Pogwiritsa ntchito chothandizira chopondera cha palladium chopanda kanthu, chomwe chimakhala ndi zochitika zapamwamba, kusankha kwakukulu (99.9%) ndi moyo wautumiki wautali, ndipo zomwe zimachitika zimachitika mu chipangizocho ndikuchepetsa chitsimikizo cha ndalama zomanga;

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 pamakonzedwe a meth proponsel proporgete ndi fordedhyde mogwirizana ndi maberetalyst, komaliza kukhazikika kwa nthawi yomwe amagwiritsa ntchito mafakitale.