Methyl methacrylate (mma) est momenti organicum eget rudis materia et polymer Monomer, maxime in productionem organicum vitrum, et pharmaceutical ad materiam polymer, electronic et pharmaceutical munus polymer, electronic et altus-fibra, electronic et alia fibra, electronic et alias, optical fibra, robotics et alias, optical fibra, robotics et aliis agris.

Ut a material monomer, MMA est maxime in productio of Polymethyl methacrylate (vulgo ut plexiglass, PMMA), et potest etiam esse copolymerized cum aliis Vinyl componit et potest etiam in diversis proprietatibus, ut ad officiosum Polyovis et in secunda Monomer in productione acrylics et secundum quod est in productione acrylics.

In praesens, sunt tres genera mature processuum ad productionem MMMA domi et foris: methacrylamide hydrolysis estteretricum Route (Acetone Cyanohydrin modum et methacryonitrile modum) isobutylene route (Mitsubishi et Asahi Route (Methylene Carbonyis Route (Renault Victoria Alpha modum).

I, Methacrylamide hydrolysis esterificatio route
Hoc iter est traditional MMA productio modum, comprehendo in Acetone Cyanohydrin modum et methacryonitrile modum, et post methacrylamide medium hydrolymas, stusterificatio synthesim de mma.

(I) Acetone Cyanohydrin Method (Thom)

ACH modum, primum developed per US Lucite, est prima industrialis productio modum MA, et quoque est amet MA productionem processus in mundum praesens. Hoc modum utitur acetone, hydrocyanic acidum, sulphuric acidum et methanolum quod rudis materiae, et reactionem gradibus includit: Cyanohydrinization reactionem, inter se reactionem et hydrolysis esterificatio reactionem.

ACH processus est technica mature, sed habet sequens gravibus incommoda:

○ usum altus toxicus hydrocyanic acidum, quae requirit stricte tutela mensuras durante repono, translationem et usum;

○ per-productio magnae moles acidum residuum (aqueum solutio cum sulphuric acidum et Ammonium bisulfate ut principalis components et continens parva moles organicum materia), quod est 2.5 ~ 3,5 temporibus, quod est moles quod est 2.5 ~ 3,5, quod de MA, quod est gravi ~ 3,5 temporibus, quod est moles quod est 2.5 ~ temporibus, quod est moles, quod est 2.5 environmental pollutio, quod est gravi 3,5 temporibus, quod est moles, quod est 2.5 ~ quod a MA, quod est gravi ~ temporibus, quod est moles, quod est 2.5 environmental pollutio;

O debitum ad usum sulphuric acidum, anti-corrosio apparatu requiritur, et constructione de fabrica est pretiosa.

(II) methacryonitrile modum (homo modum)

Asahi Kasei has developed the methacrylonitrile (MAN) process based on the ACH route, ie, isobutylene or tert-butanol is oxidized by ammonia to obtain MAN, which reacts with sulfuric acid to produce methacrylamide, which then reacts with sulfuric acid and methanol to produce MMA. Et viro itineris includit ammoniaci oxidatio reactionem, intermissione intermissione reactionem reactionem et hydrolysis estterificatio reactionem, et potest maxime apparatu de ACH plant. Et hydrolysis reactionem utitur excessus sulphuric acidum, et cede ex media methacrylamide est fere C%. Tamen, modum habet altus toxicus hydrocyanic acidum per-products, hydrocyanic acidum et sulphuric acidum valde mordax, reactionem apparatu requisitis valde altum, cum environmental in altum.

II, isobutylene oxidatio itinere
Isobutylene oxidatio fuit malle technology itinere ad major societates in mundo propter eius princeps efficientiam et environmental tutela, sed ejus technica limen est excelsum, et non erat in Technology in mundum et solum Iaponia ad Technology in mundum et non solum in Technology in Technology in mundo et solum in Technology in Technology in mundo et solum in Sinis. Methodus includit duo genera Mitsubishi processus et Asahi Kasei processus.

(I) Mitsubishi Processus (Isobutylene tres-gradus)

Iaponia est scriptor Renault Rayon Developed novum processus ad producendum MMA ex Isobutylene et Tert-butanol sicut rudis materia, duo-gradus selectivam oxidatio per aere ad methacrylic acidum (maa), et esterified cum Methanol. Post Industrializationis Mitsubishi Rayon, Japan Asahi Kasei Company, Japan Kyoto Monomer Company, Korea Felix Company, etc intellexit industrialem unum post se. The domestic Shanghai Huayi Group Company invested a lot of human and financial resources, and after 15 years of continuous and unremitting efforts of two generations, it successfully developed independently the two-step oxidation and esterification of isobutylene clean production MMA technology, and in December 2017, it completed and put into operation a 50,000-ton MMA industrial plant in its joint venture company Dongming Huayi Yuhuang Sita in Heze, Shandong Province, praevaricationem technology Monopolium de Iaponia et becoming tantum comitatu cum hoc technology in Sinis. Technology, etiam faciens Sinis in secunda regionem habere industriae technology pro productio Maa et MMM Oxidatio de Isobutylene.

(II) Asahi Kasei Processus (Isobutylene duo-gradus processus)

Japan est Asahi Kasei Corporation iam diu commissum est ad progressionem directam estterterification modum ad productionem MMA, quae prospere developed et posuit in operationem in MCMXCIX cum 60,000-ton Industrial in Kawasaki, Iaponia et postea ad 100,000 tons. The technical route consists of a two-step reaction, ie the oxidation of isobutylene or tert-butanol in the gas phase under the action of Mo-Bi composite oxide catalyst to produce methacrolein (MAL), followed by the oxidative esterification of MAL in the liquid phase under the action of Pd-Pb catalyst to produce MMA directly, where the oxidative esterification of MAL is the key step in this route to producendum MMA. Et Asahi Kasei processus modum est simplex, cum tantum duo gradus reactionem et tantum aqua ut a-productum, quod est viridis et environmentally amica, sed consilio et praeparatio et catalyst est valde. Nuntiatum est Asahi Kasei scriptor oxidative estterificatio catalyst est upgraded a primam generationem PD-PB ad novum generationem au-ni catalyst.

After the industrialization of Asahi Kasei technology, from 2003 to 2008, domestic research institutions started a research boom in this area, with several units such as Hebei Normal University, Institute of Process Engineering, Chinese Academy of Sciences, Tianjin University and Harbin Engineering University focusing on the development and improvement of Pd-Pb catalysts, etc. After 2015, domestic research on Au-Ni catalysts started Another round of BUTIO, repraesentativum cuius est Dalian Institute of eget ipsum, Seres Academy of Sciences, fecit magna progressus in parva gubernator studio, completed in optimization of Conditionis, et vertical, et actively Cyclestre in conatibus et industrializationem technology in conatibus et industrializationem technology est in industriarum.

III, ethylene carbony synthesi itinere
In technology de Ethylene Carbony Synthesis itineris Industrialization includit Bosy Processus et Ethylene-Propionic Acidum Methyl Ester processus.

(I) ethylene-propionic Acidum modum (Basf processum)

Processus ex quatuor gradibus: ethylene est hydroformylated obtinere propionaldehyde, proponaldehyde est condensatione cum formaldehyde ad producendum mal, Mal est aere oxidized in tubulosam fixum-lectum reactor est producere MA et MAA et Methanol. In reactionem est clavis gradus. Processus requirit quatuor gradus, quod est relative gravia et requirit princeps apparatu et excelsum obsidionem pretium, cum commodum est humilis sumptus rudis materiae.

Domesticis breakthroughs etiam factum est in technology progressionem ethylene, propylene-formaldehyde synthesim of MMA. MMXVII, Shanghai Huayi Group Company, in cooperante cum Nanjing Noao Novum Materials Company et Tianjin University, completed a gubernatori test de 1,000 tons of propylene et progressionem in processus sarcina ad methacrolein et progressionem ad Package ad a 90,000-ton industrialis et in elit. In addition, in Institute of processu ipsum de Seres Academy of Sciences, in cooperante cum Henan industria et eget coetus, complebitur a 1,000-ton industriae gubernator plant et feliciter effectum firmum operationem in MMXVIII.

(II) ethylene, yl propionate processus (Lucite Alpha processus)

Lucite Alpha Processus operating conditionibus sunt mitis, uber cede est princeps, planta investment et rudis materia costs sunt humilis, et quod est una unitas est facile ad magnum, et non translatum est ad extra mundum, et non transtulit in mundum, et non translatum est in mundum, et non translatum est in mundum, et non translatum est extra mundum, et non est in mundum, et non transfertur in mundum, et non translatum est in mundum, et non translatum est extra mundum, in hoc mundo non translatum est in mundum, et non transfertur in mundum, et non est in hoc mundo transfertur, et non est in mundum, et non transfertur in mundum, et non translatum est in mundum extra.

Alpha processus dividitur in duos gradus:

Primum gradum est reactionem de Ethylene cum CO et Methanol ad producendum methyl propionate

Using Palladii-fundatur homogenea carbonolation catalyst, quae habet de summus operatio, princeps selectivity (99,9%) et diu servitium vitae, quod est in fabrica et reduces in constructione capitis, in fabrica et reduces in constructione capitis, in fabrica et reduces in constructione capitis investment

Secundum gradus est reactionem de methyl propionate cum formaldehyde ad formaldehyde forma MMA

A proprietary multi-tempus Catalyst adhibetur, quae est princeps MMA selectivity. In annis, domesticis conatibus ad invested magni studium in technology progressionem de methyl propionate et formaldehyde condensatio ad MMA, et fecerunt magna progressus in catalyst et fixa, nondum pervenit ad industrialis et ad industrialis applications.