{"id":2543,"date":"2022-11-23T05:39:02","date_gmt":"2022-11-23T05:39:02","guid":{"rendered":"https:\/\/jxzd-chem.com\/?p=2543"},"modified":"2022-11-23T05:39:02","modified_gmt":"2022-11-23T05:39:02","slug":"the-application-of-acetal","status":"publish","type":"post","link":"https:\/\/jxzd-chem.com\/fr\/2022\/11\/23\/the-application-of-acetal\/","title":{"rendered":"L'application de l'ac\u00e9tal"},"content":{"rendered":"
Ac\u00e9tal<\/span><\/a> (nom chimique : di\u00e9thoxym\u00e9thane, en abr\u00e9g\u00e9 ac\u00e9tal). Au cours des dix derni\u00e8res ann\u00e9es, dans l'industrie chimique fine, en tant qu'excellent solvant organique, il a \u00e9t\u00e9 largement utilis\u00e9 dans le commerce, et sa m\u00e9thode de pr\u00e9paration, sa s\u00e9paration, sa purification et ses recherches d'application ont attir\u00e9 l'attention du monde entier.<\/h6>\n

La nature de la structure mol\u00e9culaire de ac\u00e9tal<\/span> <\/a>d\u00e9termine qu'il a une stabilit\u00e9 chimique particuli\u00e8rement bonne, d\u00e9terminant ainsi qu'il a une large gamme de valeurs d'application dans les processus chimiques. La pratique a prouv\u00e9 que l'ac\u00e9tal est stable dans de nombreuses bases fortes (telles que les hydroxydes m\u00e9talliques), NaH, les r\u00e9actifs de Grignard et les r\u00e9actifs organolithiens, mais il sera tr\u00e8s stable dans les solutions acides aqueuses. Des exp\u00e9riences ont montr\u00e9 que la vitesse de d\u00e9composition de l'ac\u00e9tal n'est \u22641% qu'apr\u00e8s 24 heures de m\u00e9lange dans un volume \u00e9gal d'acide et de solution aqueuse (pH=2) \u00e0 temp\u00e9rature ambiante. Cette stabilit\u00e9 est conf\u00e9r\u00e9e par l'hydrophobicit\u00e9 inh\u00e9rente de l'ac\u00e9tal, qui limite son exposition aux sources de protons. Par cons\u00e9quent, l'ac\u00e9tal peut toujours \u00eatre utilis\u00e9 de mani\u00e8re stable dans une solution aqueuse acide moyennement forte (pH> 4). Bien que l'ac\u00e9tal soit \u00e9galement un compos\u00e9 \u00e9ther, sa tendance \u00e0 former des peroxydes en atmosph\u00e8re oxydante est bien inf\u00e9rieure \u00e0 celle des autres \u00e9thers (tels que le t\u00e9trahydrofurane, etc.) Rarement converti en peroxyde). Il a une faible solubilit\u00e9 mutuelle avec l'eau, ce qui est b\u00e9n\u00e9fique pour la purification du produit, et l'\u00e9conomie du proc\u00e9d\u00e9 sera meilleure. On peut voir \u00e0 partir des groupes de constituants mol\u00e9culaires de l'ac\u00e9tal que ac\u00e9tal<\/span><\/a> peut \u00eatre utilis\u00e9 comme r\u00e9actif de r\u00e9action chimique, tel que r\u00e9actif d'\u00e9thoxym\u00e9thylation, r\u00e9actif de m\u00e9thyl\u00e8neation et substrat de r\u00e9action de carbonylation. L'ac\u00e9tal peut \u00e9galement \u00eatre utilis\u00e9 comme substitut du formald\u00e9hyde et de l'\u00e9thanol dans des conditions acides anhydres.<\/p>\n

\"acetal\"<\/p>\n

UN<\/b><\/strong>applications\u00a0:<\/b><\/strong><\/p>\n

    \n
  1. Ac\u00e9tal comme solvant<\/li>\n<\/ol>\n

    La stabilit\u00e9 chimique et la faible viscosit\u00e9 de ac\u00e9tal<\/span><\/a> d\u00e9terminer qu'il peut \u00eatre utilis\u00e9 comme solvant avec de bonnes performances dans divers processus chimiques tels que l'extraction, la dilution et la recristallisation. \u00c9tant donn\u00e9 que l'ac\u00e9tal n'est pas miscible \u00e0 l'eau, lorsqu'il est utilis\u00e9 comme solvant dans le traitement chimique, moins de d\u00e9chets liquides et d'eaux us\u00e9es sont g\u00e9n\u00e9r\u00e9s lors du recyclage, ce qui am\u00e9liore les avantages de protection de l'environnement et l'efficacit\u00e9 \u00e9conomique du processus de traitement. Depuis ac\u00e9tal<\/span><\/a> a un point de cong\u00e9lation aussi bas que -66\u00b0C et un point d'\u00e9bullition aussi \u00e9lev\u00e9 que 88\u00b0C, sa plage de temp\u00e9rature de fonctionnement convient \u00e0 de nombreux proc\u00e9d\u00e9s chimiques. Par cons\u00e9quent, ac\u00e9tal<\/span><\/a> est une nouvelle g\u00e9n\u00e9ration potentielle de solvants organiques industriels, qui pourraient remplacer le t\u00e9trahydrofurane (THF), l'ac\u00e9tate d'\u00e9thyle, le chlorure de m\u00e9thyl\u00e8ne, le tolu\u00e8ne, le 1,4-dioxane, le m\u00e9thyle tertiaire Solvants organiques tels que l'\u00e9ther butylique, l'oxyde d'\u00e9thyl\u00e8ne et d'autres \u00e9thers . Ac\u00e9tal<\/span> est utilis\u00e9 comme solvant organique industriel. Il a les caract\u00e9ristiques d'une large gamme d'applications, d'une s\u00e9curit\u00e9 non toxique et d'une utilisation facile.<\/p>\n

      \n
    1. Nouveaux additifs \u00e9nerg\u00e9tiques<\/li>\n<\/ol>\n

      Ac\u00e9tal<\/span><\/a> est un solvant tr\u00e8s utile dans les batteries au lithium anhydre et les batteries en aluminium anhydre. Compar\u00e9 \u00e0 d'autres solvants \u00e0 base d'\u00e9ther, on constate que l'ac\u00e9tal modifie peu la tension de la batterie, peut inhiber la d\u00e9composition des \u00e9lectrodes et des \u00e9lectrolytes et peut recharger la batterie plus de fois.<\/p>\n

      Des chercheurs de FMC Corporation des \u00c9tats-Unis ont chauff\u00e9 NaAlH et LiCl ensemble dans un ac\u00e9tal<\/span> <\/a>solvant de 25 \u00b0C \u00e0 la temp\u00e9rature de reflux d'\u00e9bullition de l'ac\u00e9tal jusqu'\u00e0 ce que la r\u00e9action soit termin\u00e9e. Les produits LiAlH peuvent \u00eatre produits directement par m\u00e9tath\u00e8se en une seule \u00e9tape171. Des chercheurs japonais ont mis au point un carburant automobile \u00e0 base de m\u00e9thanol peu polluant. Ce carburant est constitu\u00e9 de trois types de composants :<\/p>\n

      (1) M\u00e9thanol\u00a0;<\/p>\n

      (2) essence lourde, et le rapport pond\u00e9ral de (1)\/(2)=2~5\u00a0;<\/p>\n

      (3) Deux additifs ou plus (y compris ac\u00e9tal, di\u00e9thoxy\u00e9thane et MTBE, etc.).<\/p>\n

        \n
      1. Adjuvants de traitement pour r\u00e9sines et rev\u00eatements<\/li>\n<\/ol>\n

        Ac\u00e9tal<\/span><\/a> est un bon solvant pour la formulation d'adh\u00e9sifs \u00e0 base de r\u00e9sine ph\u00e9nolique, d'adh\u00e9sifs \u00e0 base de r\u00e9sine d'ur\u00e9e et d'adh\u00e9sifs en n\u00e9opr\u00e8ne. Ce type d'adh\u00e9sif a une faible viscosit\u00e9, une forte p\u00e9n\u00e9tration, de bonnes performances de brossage, un stockage stable et une dur\u00e9e de vie efficace plus longue. De plus, l'ac\u00e9tal peut \u00eatre utilis\u00e9 dans les additifs de rev\u00eatement couramment utilis\u00e9s dans les rev\u00eatements automobiles. Dans le diluant \u00e0 peinture au peroxy\u00e9thyl\u00e8ne, l'ac\u00e9tal peut remplacer le diluant au benz\u00e8ne toxique.<\/p>\n

        Ac\u00e9tal<\/span> <\/a>est utilis\u00e9 comme agent de coiffage final dans la production de r\u00e9sines de polyoxym\u00e9thyl\u00e8ne, ce qui peut non seulement am\u00e9liorer la stabilit\u00e9 thermique des copolym\u00e8res de polyoxym\u00e9thyl\u00e8ne, mais \u00e9galement augmenter le rendement des produits de r\u00e9sine. Par exemple, des chercheurs de Ticona Company en Allemagne ont dissous 0,2X 10 West (selon le poids de monom\u00e8re trioxane utilis\u00e9) d'acide trifluorom\u00e9thanesulfonique dans 500\u00d710-6 ac\u00e9tal, et l'ont ajout\u00e9 \u00e0 96. Dans un monom\u00e8re mixte compos\u00e9 de 6% trioxane et 3,41 TP2T\u2013oxolane, polym\u00e9riser \u00e0 80\u00b0C pour obtenir une r\u00e9sine ac\u00e9tal copolym\u00e9ris\u00e9e. Ces mol\u00e9cules de polym\u00e8re contiennent tr\u00e8s peu de groupes terminaux insatur\u00e9s.<\/p>\n

          \n
        1. En \u00e9quivalent formald\u00e9hyde<\/li>\n<\/ol>\n

          Ac\u00e9tal<\/span> <\/a>est une forme prot\u00e9g\u00e9e de formald\u00e9hyde qui peut \u00eatre utilis\u00e9e comme substitut du formald\u00e9hyde anhydre, rendant la r\u00e9action plus s\u00fbre. Par exemple, l'ac\u00e9tal, comme CH20, peut \u00eatre utilis\u00e9 comme r\u00e9actif m\u00e9thyl\u00e8ne. Synth\u00e8se en une \u00e9tape de d\u00e9riv\u00e9s de dihydroisoflavone utilisant l'ac\u00e9tal comme r\u00e9actif.<\/p>","protected":false},"excerpt":{"rendered":"

          Ac\u00e9tal (nom chimique : di\u00e9thoxym\u00e9thane, abr\u00e9g\u00e9 en ac\u00e9tal). Au cours des dix derni\u00e8res ann\u00e9es, dans l'industrie chimique fine, en tant qu'excellent solvant organique, il a \u00e9t\u00e9 largement utilis\u00e9 dans le commerce, et sa m\u00e9thode de pr\u00e9paration, sa s\u00e9paration, sa purification et sa recherche d'application ont attir\u00e9 l'attention du monde entier. La nature de la structure mol\u00e9culaire de l'ac\u00e9tal d\u00e9termine\u2026<\/p>\n

          L'application de l'ac\u00e9tal<\/span> Lire la suite \u00bb<\/a><\/p>","protected":false},"author":1,"featured_media":755,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-2543","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"yoast_head":"\nThe\u00a0Application of Acetal - Jiangxi Zhongding Biotechnology Co., Ltd.<\/title>\n<meta name=\"description\" content=\"The nature of the molecular structure of acetal determines that it has particularly good chemical stability, thus determining that it has a wide range of application values \u200b\u200bin chemical processes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jxzd-chem.com\/fr\/2022\/11\/23\/the-application-of-acetal\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The\u00a0Application of Acetal\" \/>\n<meta property=\"og:description\" content=\"Leading manufacturer of lactic acid esters, aldehydes, caprylic acid glyceride series, and surfactants in China\" \/>\n<meta property=\"og:url\" content=\"https:\/\/jxzd-chem.com\/fr\/2022\/11\/23\/the-application-of-acetal\/\" \/>\n<meta property=\"og:site_name\" content=\"Jiangxi Zhongding Biotechnology Co., Ltd.\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/profile.php?id=100086957581124\" \/>\n<meta property=\"article:published_time\" content=\"2022-11-23T05:39:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/jxzd-chem.com\/wp-content\/uploads\/2022\/09\/leaves-free-img.png\" \/>\n\t<meta property=\"og:image:width\" content=\"755\" \/>\n\t<meta property=\"og:image:height\" content=\"596\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"jxzd-chem\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"jxzd-chem\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/jxzd-chem.com\/2022\/11\/23\/the-application-of-acetal\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/jxzd-chem.com\/2022\/11\/23\/the-application-of-acetal\/\"},\"author\":{\"name\":\"jxzd-chem\",\"@id\":\"https:\/\/jxzd-chem.com\/#\/schema\/person\/67264c05528720c82a087485b896f513\"},\"headline\":\"The\u00a0Application of Acetal\",\"datePublished\":\"2022-11-23T05:39:02+00:00\",\"dateModified\":\"2022-11-23T05:39:02+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/jxzd-chem.com\/2022\/11\/23\/the-application-of-acetal\/\"},\"wordCount\":757,\"publisher\":{\"@id\":\"https:\/\/jxzd-chem.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/jxzd-chem.com\/2022\/11\/23\/the-application-of-acetal\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/jxzd-chem.com\/wp-content\/uploads\/2022\/09\/leaves-free-img.png\",\"articleSection\":[\"News\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/jxzd-chem.com\/2022\/11\/23\/the-application-of-acetal\/\",\"url\":\"https:\/\/jxzd-chem.com\/2022\/11\/23\/the-application-of-acetal\/\",\"name\":\"The\u00a0Application of Acetal - 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