{"id":7574,"date":"2019-06-01T02:28:03","date_gmt":"2019-05-31T23:28:03","guid":{"rendered":"https:\/\/masterchem.fi\/product\/metanol\/"},"modified":"2022-04-19T14:38:52","modified_gmt":"2022-04-19T11:38:52","slug":"metanol-cas-67-56-1","status":"publish","type":"product","link":"https:\/\/masterchem.fi\/sv\/produkt\/metanol-cas-67-56-1\/","title":{"rendered":"Metanol (CAS 67-56-1)"},"content":{"rendered":"<p style = \"text-align: left;\"> Produktionen av metanol har varit k\u00e4nd under l\u00e5ng tid och det exakta ursprunget till de f\u00f6rsta produktionsmetoderna \u00e4r inte k\u00e4nt. Metanol kan framst\u00e4llas med ett antal olika metoder, s\u00e5som genom syntes fr\u00e5n naturgas, men det enklaste \u00e4r att l\u00e5ta v\u00e4te reagera med kolmonoxid (kolmonoxid) genom hydrering fr\u00e5n vattengas. Reaktionen sker sedan enligt f\u00f6ljande: <\/p>\n<dl>\n<dd> CO + 2 H <sub> 2 <\/sub> \u2192 CH <sub> 3 <\/sub> OH. <\/dd>\n<\/dl>\n<p style = \"text-align: left;\"> <sup id = \"cite_ref-PM_1-0\" class = \"reference\"> <\/sup> Reaktionen kan p\u00e5skyndas av katalysatorer s\u00e5som koppar, zink eller kromoxider. Uppmuntrande resultat har ocks\u00e5 uppn\u00e5tts genom anv\u00e4ndning av bly och tallium som katalysatorer. Solljus kan ocks\u00e5 anv\u00e4ndas som energik\u00e4lla f\u00f6r produktion av v\u00e4te f\u00f6r produktion. Produktionen av metanol fr\u00e5n naturgas \u00e4r f\u00f6rdelaktig eftersom gasen redan \u00e4r ren och omvandlingseffektiviteten typiskt \u00e4r h\u00f6g, cirka 60-70%, men mer \u00e4n 80% effektivitet har uppn\u00e5tts. Med tanke p\u00e5 utnyttjandet av spillv\u00e4rme fr\u00e5n tillverkningsprocessen f\u00f6r elproduktion kan effektiviseringar p\u00e5 mer \u00e4n 90% uppn\u00e5s. <\/p>\n<p style = \"text-align: left;\"> Metanol produceras ocks\u00e5 genom torr destillation av tr\u00e4, varf\u00f6r det ocks\u00e5 kallas <i> tr\u00e4sprit <\/i>. Den kan bara tillverkas av tr\u00e4 eller annan biomassa med n\u00e5got l\u00e4gre effektivitet \u00e4n v\u00e4te och kolmonoxid. <Sup id = \"cite_ref-lampinen119_8-0\" class = \"reference\"> <\/sup> Detta resulterar i en konverteringseffektivitet p\u00e5 cirka 42-66%.<\/p>\n<p style = \"text-align: left;\"> Atmosf\u00e4risk kolbalans st\u00f6rs inte om energigr\u00f6dor, s\u00e5som flis eller till och med avfallspapper, anv\u00e4nds f\u00f6r att producera den kolmonoxid som beh\u00f6vs f\u00f6r massproduktion av metanol. \u00c4ven om kolresurser eller olja anv\u00e4ndes ist\u00e4llet f\u00f6r att producera kolmonoxid skulle minskningen av v\u00e4xthusgasutsl\u00e4ppen bli dramatisk j\u00e4mf\u00f6rt med anv\u00e4ndningen av traditionella fossila br\u00e4nslen. EROEI av tr\u00e4metanol \u00e4r cirka 5,5. <\/p>\n<p><strong>Beskrivning:<\/strong><br \/>\nMetanol \u00e4r den enklaste monohydratalkoholen, en f\u00e4rgl\u00f6s giftig v\u00e4tska, en orenhet. Detta \u00e4r den f\u00f6rsta, enklaste representanten f\u00f6r en homolog serie monohydroalkoholer. De st\u00f6rsta konsumenterna \u00e4r tillverkare av formaldehyd, hartser och andra produkter baserade p\u00e5 den. Viktiga egenskaper hos metanol \u00e4r god vattenl\u00f6slighet och l\u00e5g fryspunkt. Metanol \u00e4r blandbart i alla f\u00f6rh\u00e5llanden med vatten och de flesta organiska l\u00f6sningsmedel. Liksom etylalkohol \u00e4r det ett starkt l\u00f6sningsmedel.<\/p>\n<p><strong>Anv\u00e4ndning och anv\u00e4ndning:<\/strong><br \/>\n\u2022 inom oljeraffineringindustrin anv\u00e4nds metanol som l\u00f6sningsmedel f\u00f6r att rena bensin fr\u00e5n merkaptaner och f\u00f6r att frig\u00f6ra toluen;<br \/>\n\u2022 inom gasindustrin &#8211; som ett reagens i kampen mot bildandet av hydrater och delvis som ett reagens f\u00f6r torkning av naturgas, som en h\u00e4mmare av hydrater som bildas i gasledningar;<br \/>\n\u2022 som en h\u00f6goktant br\u00e4nsletillsats som \u00f6kar motoreffekten samtidigt som avgaserna minskar drastiskt;<br \/>\n\u2022 proteinsyntes (protein-vitaminkoncentrat);<br \/>\n\u2022 vid produktion av dimetyltereftalat, bek\u00e4mpningsmedel, v\u00e4xtskyddskemikalier, \u00e4ttiksyra och myrsyra (den senare anv\u00e4nds f\u00f6r koagulering av latex, som ett l\u00e4dergarvmedel, som livsmedelsskydd och f\u00f6r strykning av foder).<br \/>\n\u2022 3\/4 av den producerade metanolen konsumeras i den kemiska industrin f\u00f6r produktion av formalin-, urotropin-, \u00e4ttiksyra- och metyleringsprodukter;<br \/>\n\u2022 Inom den petrokemiska industrin \u00e4r de st\u00f6rsta konsumenterna produktion av isopren och terti\u00e4r metylbutyleter.<br \/>\n\u2022 Ett viktigt omr\u00e5de f\u00f6r metanolf\u00f6rbrukningen har nyligen varit produktionen av biodieselbr\u00e4nslen som erh\u00e5llits genom att rapsolja rapsolja med CH3OH.<\/p>\n<p><strong>Fysiska egenskaper<\/strong><br \/>\nBildar explosiva blandningar med luft i en koncentration av 6,98 till 35,5 volym-% (flampunkt 8 \u00b0 C).<br \/>\nDensitet &#8211; 0,7918 g \/ cm 3<br \/>\nSm\u00e4ltpunkt -97,9 \u2070C<br \/>\nKokpunkt +94,5 \u2070C<\/p>\n","protected":false},"excerpt":{"rendered":"<p style = \"text-align: left;\"> <b> Andra namn: metanol, metylalkohol <\/b> <\/p>\n<p style = \"text-align: left;\"> Metanol eller metylalkohol \u00e4r en giftig alkohol. Metanol \u00e4r en f\u00e4rgl\u00f6s v\u00e4tska under normala f\u00f6rh\u00e5llanden. Det brinner med en n\u00e4stan f\u00e4rgl\u00f6s eld, bildar koldioxid och vatten: <\/p>\n<dl>\n<dd> 2 CH <sub> 3 <\/sub> OH + 3O <sub> 2 <\/sub> \u2192 2 CO <sub> 2 <\/sub> + 4 H <sub> 2 <\/sub> O <\/ dd>\n<\/dl>\n<p style = \"text-align: left;\"> Metanol \u00e4r ett viktigt utg\u00e5ngsmaterial i den kemiska industrin. Dessutom anv\u00e4nds den bland annat som l\u00f6sningsmedel, frostskyddsmedel och br\u00e4nsle. <\/p>\n","protected":false},"featured_media":6024,"template":"","meta":[],"product_brand":[],"product_cat":[108,111,112,113,114,116,103,104,106],"product_tag":[],"class_list":{"0":"post-7574","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-metallkemikalier","7":"product_cat-trabearbetningskemikalier","8":"product_cat-byggbranschen","9":"product_cat-vaggmalning","10":"product_cat-typografiska-kemikalier","11":"product_cat-alla-produkter","12":"product_cat-frostskydd","13":"product_cat-bil-och-maskinkemikalier","14":"product_cat-lakemedelsindustri","16":"first","17":"instock","18":"taxable","19":"shipping-taxable","20":"purchasable","21":"product-type-variable","22":"has-default-attributes","23":"rtwpvg-product"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Metanol (CAS 67-56-1) - MasterChem | kemikaalien tuotanto ja myynti<\/title>\n<meta name=\"description\" content=\"Metanol eller metylalkohol \u00e4r en giftig alkohol. 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