I-Methyl Methacrylate (MMA) iyinto ebalulekile ebalulekile ye-organic chemical ebonakalayo ne-polymer monomer, esetshenziswa ikakhulukazi ekukhiqizeni ingilazi ye-organic, izinsimbi zokubumba, i-acrylics, i-actifing funcy polymer izinto, imininingwane ye-elekthronikhi, amarobhothi nezinye izinkambu.

Njenge-monomer ebonakalayo, i-MMA isetshenziswa ikakhulukazi ekukhiqizeni i-polymethyl methacrylate (eyaziwa kakhulu ngokuthi i-plexiglass, i-PVC), futhi ingaba yi-polyvinyl chlorties (PVC) i-additives chlomer (PVC) angezengelu

Njengamanje, kunezinhlobo ezintathu zezinqubo ezivuthiwe zokukhiqizwa kwe-MMA ekhaya nakwamanye amazwe: Indlela ye-Methacrylive Hydrolysis kanye ne-Asahi KaseI (Inqubo ye-Asahi Kasei) kanye nendlela ye-ASYLELE CARBONYL).

1, Methacrylamide Hydrolysis indlela yokuqinisekisa
Le ndlela iyindlela yokukhiqiza yendabuko yendabuko, kufaka phakathi indlela ye-Acetoone Cyanohydrin kanye nendlela ye-methacrylonitritri, zombili ngemuva kwe-methamide hydrolysis, ukucaciswa kwe-methacrylamide phakathi kwe-hydrolysis, ukucaciswa kokuqonda kwe-MMA.

(1) I-Acetone CyanohyDrin Way (Indlela ye-ACH)

Indlela ye-ACH, eyakhiwe kuqala yi-US LUCITE, iyindlela yokuqala yokukhiqiza yezimboni ye-MMA, futhi futhi iyinqubo yokukhiqiza ye-MMA emhlabeni njengamanje. This method uses acetone, hydrocyanic acid, sulfuric acid and methanol as raw materials, and the reaction steps include: cyanohydrinization reaction, amidation reaction and hydrolysis esterification reaction.

Inqubo ye-ACH ivuthiwe ngobuchwepheshe, kepha inezinto ezinzima ezilandelayo:

○ ukusetshenziswa kwe-acid enobuthi kakhulu ye-hydrocyanic, okudinga izindlela eziqinile zokuzivikela ngesikhathi sokugcina, ukuthuthwa nokusetshenziswa;

Ukukhiqizwa kwenani elikhulu lezinsalela ze-acid (isisombululo esinamanzi nge-sulfuric acid ne-ammonium bisulfate njengezakhi eziphambili futhi ziqukethe inani elincane lezinto eziphilayo), inani layo elingu-2,5 ~ 3.5 lelo mbumbululo wezemvelo;

o Ngenxa yokusetshenziswa kwe-sulfuric acid, imishini yokulwa nokonakala iyadingeka, futhi ukwakhiwa kwensiza kuyabiza.

(2) Indlela ye-MethacRylonitriTle (Indlela Yendoda)

U-Asahi Kasei usungule inqubo ye-methacrylonitritritritritritritritritritritritritritritritritritria (ie, i-isobitylene noma i-tert-butanol i-ampimonia ukuthola umuntu, ophendulayo nge-sulfuric acid ukukhiqiza i-sulfuric acid ne-methanol ukukhiqiza i-mma. Indlela yendoda ifaka ukusabela kwe-oxidation ye-ammonia, ukusabela kwezindawo zokuvuselela kanye nokusabela kwe-hydrolysis, futhi kungasebenzisa iningi lemishini yesitshalo se-ach. Ukusabela kwe-hydrolysis kusebenzisa i-sulfuric acid eyeqile, kanye nesivuno se-Methamemite Methacrylamide cishe i-100%. Kodwa-ke, indlela ine-acidi enobuthi ye-hydrocyanic acid ngemikhiqizo, i-hydrocyanic acid kanye ne-sulfuric acid kukhuliswe kakhulu, izidingo zemishini yokuphendula ziphezulu kakhulu, ngenkathi izikweletu zezemvelo ziphezulu kakhulu.

2, i-isobitylene oxidation umzila
I-IsobityLene Oxidation ibe yinto ekhethwayo yobuchwepheshe ezinkampanini ezinkulu emhlabeni ngenxa yokusebenza kwayo okuphezulu nokuvikelwa kwezemvelo, kepha umkhawulo wayo wezobuchwepheshe, kepha iJapan kuphela owake waba nobuchwepheshe emhlabeni futhi ivimbe ubuchwepheshe eChina. Indlela ifaka izinhlobo ezimbili zenqubo ye-Mitsubishi nenqubo ye-Asahi Kasei.

(1) Inqubo ye-Mitsubishi (Indlela ye-Isobitylene Yesinyathelo Esithathu)

I-Mitsubishi yaseJapan yathuthukisa inqubo entsha yokukhiqiza i-Isobitylene noma i-tert-butanol njenge-axidation eluhlaza, i-oxidation ezimbili zokukhetha umoya ngomoya ukuze uthole i-methanrylic acid (Maa), bese kubalwa nge-methanol. Ngemuva kokuthuthukiswa kwezimboni zaseMitsubishi Rayon, Inkampani yaseJapan Asahi Katei, iJapan Kyoto Monomer Company, Korea Lucky Company, njll. Uthole izimboni zezezimboni zangempela ngemuva kwesinye. Inkampani yeqembu laseShanghai Huayi Huayi itshale izinsizakusebenza eziningi zabantu nezezimali, kwathi ngemuva kweminyaka engu-15 yezizukulwane ezimbili, yathuthukisa ngempumelelo isitshalo sezizukulwane ze-asobitylwetion insizakalo yayo ehlanganayo ye-dongming huhing yuhuang etholakala ku-heze, Isifundazwe saseShandong, ukwephula ubuchwepheshe be-monopoly yaseJapan kanye nokuba yinkampani kuphela enale teknoloji eChina. Ubuchwepheshe, nokwenza neChina izwe lesibili laba nobuchwepheshe obuthuthukile bokukhiqizwa kwe-MAA ne-MMA nge-oxidation ye-isobitylene.

(2) Inqubo ye-Asahi Kasei (inqubo yezinyathelo ezimbili)

I-Asahi Kasei Corporation isikhathi eside yazibophezela ekwakhiweni kwendlela yokucaciswa eqondile yokukhiqizwa kwe-MMA, okwakhiwa ngempumelelo futhi yasebenza ngo-1999 ngesitshalo sezimboni ezingama-60 eKawasaki, eJapan, futhi kamuva yandiswa ibe ngamathani ayi-100,000. Indlela yezobuchwepheshe iqukethe ukusabela kwezinyathelo ezimbili, okusho ukuthi i-axidation ye-isobitylene noma i-tert-butanol esigabeni segesi ngaphansi kwesenzo se-MMA esisezingeni se-MMA esisezingeni eliphakeme, lapho ukucaciswa kwe-oxidative of mal kuyisinyathelo esingukhiye kule ndlela yokukhiqiza i-MMA. Indlela yenqubo ye-Asahi Katei ilula, ngezinyathelo ezimbili kuphela zokusabela nokuzama kuphela amanzi njengomkhiqizo, okuluhlaza futhi okunobungane, kepha ukwakheka nokulungiswa kwe-catalyst kufunwa kakhulu. Kubikwa ukuthi i-Asahi Katehi's oxidativation detalyst iye yathuthukiswa kusuka esizukulwaneni sokuqala se-PD-PB esizukulwaneni esisha se-Au-Nina Catalyst.

Ngemuva kokuthuthukiswa kwezimboni zika-Asahi Katei Technology, kusukela ngo-2003 kuya ku-2008, izikhungo ezicwaninga ngezindlu zaqala ukucwaninga kwezobunjiniyela, njll. Ngemuva kokwenziwa kwezesayensi, njll. Ngemuva kokwenziwa kwesakhiwo se-PD-PB, ucwaningo lwasekhaya nge-AU-NI Catalysts lwaqala Omunye umjikelezo we-boom, omele i-Dalian Institute of Chemical Engineering, i-Chinese Academy of Science, ithuthukise kakhulu ekuhlolweni kwezindiza, futhi manje isivuselela amandla okuvuselela i-Nano-Gold Cycle

I-3, ethylene carbonyl synthesis indlela
Ubuchwepheshe be-ethylene carbonyl synonyl synthesis indlela yezezimboni ifaka inqubo ye-BASF nenqubo ye-ethylene-proppecic acid methyl ester.

(1) Indlela ye-Ethylene-proppic acid (inqubo ye-BASF)

Le nqubo iqukethe izinyathelo ezine: I-Ethylene ihlelwe nge-propionaldehyde, i-propIonaldehyde ihoxisiwe nge-formaldehyde ephendulwayo ekuphendukeni kwe-mal, futhi i-maa ihlukaniswe futhi ihlanzwe ukukhiqiza i-methanol. Ukusabela isinyathelo esiyisihluthulelo. Inqubo idinga izinyathelo ezine, okuyinto ebaluleke kakhulu futhi idinga imishini ephezulu kanye nezindleko eziphezulu zokutshala imali, kuyilapho inzuzo izindleko eziphansi zezinto zokusetshenziswa.

Ama-ekhreji asezifuywayo nawo enziwe ekuthuthukisweni kobuchwepheshe kwe-ethylene-propylene-formaldehyde synthesis ye-MMA. Inkampani yeqembu le-2017, ngokubambisana neNanjing NOAO Materials Company neTianjin University, i-Tons Test yamathani angu-1 000 e-propylene-formaldehyde nge-MethacDehyde ephaketheni lenqubo yesitshalo esinezimboni ezingama-90,000. Ngaphezu kwalokho, i-Institute of Process Engineering ye-Chinese Academy of Sciences of Science, ngokubambisana neHenan Energy ne-Chemical Group, iqedele isitshalo sokushayela sezimboni esingu-1 000-i-Indandatho yezimboni futhi ifinyelelwe ngokuphumelelayo nokusebenza okuzinzile ngo-2018.

(2) Inqubo ye-Ethylene-MethTyl Pornionate (Inqubo yeLucite Alpha)

Izimo zenqubo yokusebenza yeLucite Alpha ziyinhle, isivuno somkhiqizo siphezulu, ukutshalwa kwezimali kwezitshalo nezindleko ezibonakalayo ezingavuthiwe ziphansi, kanti isilinganiso seyunithi elilodwa kulula ukwenza okukhulu, njengamanje kuphela iLucite enokulawulwa okukhethekile kwalobu buchwepheshe emhlabeni futhi ayidluliselwa emhlabeni wangaphandle.

Inqubo ye-alpha ihlukaniswe izinyathelo ezimbili:

Isinyathelo sokuqala ukusabela kwe-ethylene nge-CO ne-methanol ukukhiqiza i-methyl parp

Usebenzisa i-calladium-based homogeneous carboneneous carbonylivation Catalyst, enezici zomsebenzi ophakeme, ukhethe ephezulu (99.9%) kanye nempilo yenkonzo ende, futhi ukusabela kwenziwa ngaphansi kwezimo ezimnene, okunciphiswa kancane kudivayisi futhi kunciphise ukutshalwa kwemali kwemali;

Isinyathelo sesibili ukusabela kwe-methyl parp nge-formaldehyde ukwakha i-MMA

Kusetshenziswa i-catalyst ye-multi-Phales ehlukahlukene, enokukhethwa okuphezulu kwe-MMA. Eminyakeni yamuva nje, amabhizinisi asekhaya atshale umdlandla omkhulu ekuthuthukiseni ubuchwepheshe bokuvuselelwa kwe-methyl kanye ne-formaldehyde ukuthuthukiswa kwe-catalyst kanye nokuthuthukiswa kwenqubo yokusabela embhedeni, kepha impilo ye-catalyst ayikafinyeleli izidingo zezicelo zezimboni.