Methyl methacrylate (mma) est momenti organicum eget rudis materia et polymer Monomer, maxime in productio organicum vitrum, et pharmaceutical functionali polymer materiae, electronic Information, optical fibra, robotics et aliis agris.

Ut a material monomer, MMA est maxime in productionem Polymethyl methacrylate (vulgo ut plexiglass, PMMA), et potest etiam esse copolymerized cum aliis Vinyl componit ad consequi products cum diversis proprietatibus, ut pro officinis Polyovinyl chloride (PVC ) additives acr, MBs et sicut secunda Monomer in productione acrylics.

In praesens, sunt tria genera mature processuum ad productionem MMMA domi et foris: methacrylamide hydrolysis estteretricum route (Acetone Cyanohydrin modum et methacryonitrile modum), isobutylene kasei route (Mitsubishi et Asahi Kasei Route (Mitsubishi Synthesis Route ( Basf Method et Lucite 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;

○ By-production of a large amount of acid residue (aqueous solution with sulfuric acid and ammonium bisulfate as main components and containing a small amount of organic matter), the amount of which is 2.5~3.5 times that of MMA, and is a serious Fontem 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 est developed methacryonitrile (homo) processus secundum ACH route, id est, isobutylene vel Tert-butanol est oxidized ab Ammonia ad consequi hominem, quod reagit cum acidum acidum et methanol 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. In domesticis Shanghai Huayi Group Company invested multus of humanae et financial opibus, et post XV annos continui et assidue nisus de duabus generationibus, quod feliciter developed independing in duos gradus technology et in December MMXVII Et perficitur et posuit in operationem a 50,000-ton mma industriae planta in sua iuncturam venture comitatu dongming huayi Yuhuang sita in Huayi Huayi Sita in Huayi Huayi Huayi Technology Monopolium in Sinis et becoming tantum comitatu in Technology in Sinis et 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. Technical Route consistit ex duobus-step reactionem, id est oxidatio isobutylene vel Tert-butanol in Gas tempus sub actione MO-per compositorum oxide Catalyst ad producere methacrolein (mal, sequitur ex oxidative esterificatio Mala in Liquid Phase in actione PD-PB catalyst ad producendum MMM directe, ubi oxidative estterificatio mal, est clavis gradus in hoc itinere ad 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.

Post industria de Asahi Kasei Technology, a MMIII ad MMVIII, domesticis investigationis institutions coepi a investigationis BUTIO in hac area, cum pluribus unitates ut Hebei normalis University, Institute of Processus Engineering, Chinese Academy of Sciences, Tianjin University et Harbin Engineering University, Tianjin University et Harbin Engineering University, Tianjin University et Harbin Engineering University, Tianjin University et Harbin Engineering University, Tianjin University et Harbin Engineering University, Tianjin University et Harbin Engineering University, Tianjin University et Harbin Engineering University, Tianjin University et Harbin Engineering University, Tianjin Universitatis et Harbin Engineering University, Tianjin University et Harbin of Sciences: In progressionem et emendationem PD-PB Catalyssts, etc post MMXV, domesticis investigationis in au-ni catalysts coepi alium per BUTIO, quae est Dalian Institute of Chemical, Seres Academy of Sciences: Parvus gubernator studium, complebitur optimization of Nano-aurum catalyst praeparatio processus, reactionem condicionem protegendo et vertical upgrade diu-cycle operationem et conatibus ut develop industrialem technology.

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)

The process consists of four steps: ethylene is hydroformylated to obtain propionaldehyde, propionaldehyde is condensed with formaldehyde to produce MAL, MAL is air oxidized in a tubular fixed-bed reactor to produce MAA, and MAA is separated and purified to produce MMA by esterification with 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 scale unum unitas est facile ad magna, et non est in mundo non est in mundum, et non est in mundum non est in hoc mundo, et non est in mundum, et non est in mundum, et non translata ad extra mundum.

Alpha processus dividitur in duos gradus:

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

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

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 condensationem ad MMA, et fecerunt magna progressus in catalyst et fixum-lectum reactionem processus progressionem, sed in catalyst vita nondum pervenit ad opus industriae Applications.