{"id":4885,"date":"2021-12-08T12:34:41","date_gmt":"2021-12-08T12:34:41","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=4885"},"modified":"2026-04-28T10:41:52","modified_gmt":"2026-04-28T10:41:52","slug":"cpba-and-dmf-no-together","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/fr\/cpba-and-dmf-no-together\/","title":{"rendered":"Il existe un risque d'explosion lorsque le m-CPBA et le DMF r\u00e9agissent ensemble."},"content":{"rendered":"<!-- lc-qa-start -->\n<p><strong>R\u00e9ponse rapide :<\/strong> Surface-control additives are usually selected by defect type, compatibility, and dosage window. The strongest commercial choice is the one that fixes the real problem without creating a new one.<\/p>\n<!-- lc-qa-end -->\n\n\n<p>Le DMF est l'un des solvants les plus utilis\u00e9s en synth\u00e8se organique, et il est \u00e9galement connu sous le nom de solvant universel. Aujourd'hui, je vais partager avec vous un cas de r\u00e9action. L'utilisation combin\u00e9e du m-CPBA et du DMF est \u00e9galement potentiellement dangereuse. Le m-CPBA, \u00e9galement connu sous le nom d'acide m-chloroperoxybenzo\u00efque, est un type d'oxydant organique tr\u00e8s couramment utilis\u00e9 en chimie organique. D'un point de vue relatif, il est relativement s\u00fbr. Cependant, le domaine de la chimie est plein d'inconnues. Un accident rapport\u00e9 dans la litt\u00e9rature partag\u00e9e aujourd'hui est li\u00e9 \u00e0 l'utilisation mixte de m-CPBA et de DMF, et est directement li\u00e9 aux transformations chimiques suivantes.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"387\" height=\"92\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/1.jpg\" alt=\"\" class=\"wp-image-4886\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/1.jpg 387w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/1-300x71.jpg 300w\" sizes=\"(max-width: 387px) 100vw, 387px\" \/><\/figure>\n\n\n\n<p>Les synth\u00e9tiseurs de Fujisawa Pharmaceutical Company au Japon ont utilis\u00e9 le m-CPBA pour oxyder le soufre en sulfoxyde en utilisant le DMF comme solvant \u00e0 l'\u00e9chelle pilote. Les synth\u00e9tiseurs ont d'abord m\u00e9lang\u00e9 6,3 litres de DMF et 11,0 kg de m-CPBA, puis ont agit\u00e9 le tout pendant 2 heures. Les mati\u00e8res insolubles se forment dans le syst\u00e8me, puis sont filtr\u00e9es pour obtenir une solution claire, qui est ensuite ajout\u00e9e \u00e0 la solution de r\u00e9action organique. Lorsque le processus d'\u00e9gouttage est effectu\u00e9 pendant 1 heure, la solution DMF de m-CPBA s'\u00e9l\u00e8ve soudainement, et du gaz est lib\u00e9r\u00e9. La solution de DMF de m-CPBA s'\u00e9l\u00e8ve brusquement et du gaz est lib\u00e9r\u00e9, puis explose soudainement. L'auteur de cet article (Org. Proc. Res. Dev.) d\u00e9crit bri\u00e8vement le processus de r\u00e9action dans la figure suivante.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"392\" height=\"119\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/2.jpg\" alt=\"\" class=\"wp-image-4887\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/2.jpg 392w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/2-300x91.jpg 300w\" sizes=\"(max-width: 392px) 100vw, 392px\" \/><\/figure>\n\n\n\n<p>Le personnel de synth\u00e8se a imm\u00e9diatement cherch\u00e9 la cause de l'accident et de l'explosion. Ils ont \u00e9mis l'hypoth\u00e8se que l'accident et l'explosion \u00e9taient probablement dus \u00e0 des mati\u00e8res insolubles, et que ces mati\u00e8res insolubles \u00e9taient pr\u00e9cis\u00e9ment du m-CBPO. Cette mati\u00e8re insoluble peut \u00eatre une impuret\u00e9 provenant de la mati\u00e8re premi\u00e8re m-CPBA elle-m\u00eame, ou peut \u00eatre g\u00e9n\u00e9r\u00e9e progressivement dans le syst\u00e8me de r\u00e9action. L'auteur de cet article a ensuite men\u00e9 une s\u00e9rie d'exp\u00e9riences de v\u00e9rification. Il a constat\u00e9 que la teneur en m-CBPO de la mati\u00e8re premi\u00e8re m-CPBA n'\u00e9tait que de 0,2%. En outre, les exp\u00e9riences DTA et IST ont confirm\u00e9 que le m-CPBA fond \u00e0 89 degr\u00e9s et est stable \u00e0 moins de 97 degr\u00e9s. L'auteur a ensuite r\u00e9alis\u00e9 une \u00e9tude DTA sur la solution DMF de m-CPBA, et les r\u00e9sultats ont montr\u00e9 que la temp\u00e9rature de d\u00e9composition du m-CPBA \u00e9tait de 83 degr\u00e9s. Les exp\u00e9riences ci-dessus montrent que le DMF peut largement affecter le point critique de la temp\u00e9rature de d\u00e9composition du m-CPBA. Par cons\u00e9quent, l'auteur pense que le solvant DMF a jou\u00e9 un r\u00f4le important dans cet accident.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/3-1.jpg\" alt=\"\" class=\"wp-image-4889\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"472\" height=\"422\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/4.jpg\" alt=\"\" class=\"wp-image-4890\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/4.jpg 472w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/4-300x268.jpg 300w\" sizes=\"(max-width: 472px) 100vw, 472px\" \/><\/figure>\n\n\n\n<p>L'auteur a ensuite constat\u00e9 qu'\u00e0 mesure que la temp\u00e9rature augmentait, la teneur en m-CBPO augmentait de mani\u00e8re significative, et la recherche DTA a montr\u00e9 que lorsque la temp\u00e9rature atteint plus de 125 degr\u00e9s, une explosion tr\u00e8s grave peut \u00eatre pr\u00e9vue.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"452\" height=\"311\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/5.jpg\" alt=\"\" class=\"wp-image-4891\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/5.jpg 452w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/5-300x206.jpg 300w\" sizes=\"(max-width: 452px) 100vw, 452px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"466\" height=\"408\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/6.jpg\" alt=\"\" class=\"wp-image-4893\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/6.jpg 466w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/6-300x263.jpg 300w\" sizes=\"(max-width: 466px) 100vw, 466px\" \/><\/figure>\n\n\n\n<p>L'auteur a ensuite r\u00e9alis\u00e9 une \u00e9tude ARC de la solution DMF de m-CPBA, une \u00e9tude de concentration et une \u00e9tude de stabilit\u00e9 mixte du m-CPBA et du m-CPBO. La conclusion finale est qu'il faut 185 minutes pour que la solution DMF de m-CPBA passe lentement de 26 degr\u00e9s \u00e0 70 degr\u00e9s, puis qu'elle atteigne rapidement 200 degr\u00e9s en quelques minutes ou plus. En outre, la solution DMF de m-CPBA la plus concentr\u00e9e se r\u00e9chauffe plus rapidement. L'exp\u00e9rience de m\u00e9lange de m-CPBA et de m-CPBO montre que la temp\u00e9rature augmente lentement au d\u00e9but, mais qu'apr\u00e8s seulement 95 minutes, il y a une forte augmentation de la temp\u00e9rature.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"494\" height=\"891\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/7.jpg\" alt=\"\" class=\"wp-image-4895\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/7.jpg 494w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/7-166x300.jpg 166w\" sizes=\"(max-width: 494px) 100vw, 494px\" \/><\/figure>\n\n\n\n<p>En r\u00e9sum\u00e9, l'auteur de cet article pr\u00e9sente le processus g\u00e9n\u00e9ral de l'explosion. Tout d'abord, la formation de m-CPBO entra\u00eene une augmentation de la temp\u00e9rature, puis la formation d'une grande quantit\u00e9 de m-CPBO provoque une explosion \u00e0 haute temp\u00e9rature. Finalement, l'auteur a utilis\u00e9 le dichlorom\u00e9thane DCM comme solvant pour r\u00e9soudre ce probl\u00e8me avec succ\u00e8s. Les exp\u00e9riences DTA montrent qu'en utilisant le dichlorom\u00e9thane comme solvant, il n'y a pas d'exothermie dans le temps.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"466\" height=\"312\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/10-1.jpg\" alt=\"\" class=\"wp-image-4896\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/10-1.jpg 466w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2021\/12\/10-1-300x201.jpg 300w\" sizes=\"(max-width: 466px) 100vw, 466px\" \/><\/figure>\n\n\n\n<p>Exp\u00e9rimentez avec des dizaines de milliers de personnes, la s\u00e9curit\u00e9 avant tout ! <strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/dimethyl-sulfoxide-cas-67-68-5\/\" target=\"_blank\" rel=\"noreferrer noopener\">DMSO<\/a><\/strong> et le DMF sont des solvants polaires puissants, qui pr\u00e9sentent une bonne solubilit\u00e9 pour les substances organiques, mais qui sont aussi une arme \u00e0 double tranchant !<\/p>\n\n\n<!-- lc-commercial-start -->\n<h2>Comment les acheteurs \u00e9valuent-ils g\u00e9n\u00e9ralement les additifs pour rev\u00eatements et encres<\/h2>\n<p>La s\u00e9lection additive est g\u00e9n\u00e9ralement plus efficace lorsque l'\u00e9quipe d\u00e9finit d'abord le d\u00e9faut, puis examine la compatibilit\u00e9, la plage de dosage et le stade du processus. C'est souvent beaucoup plus fiable que de choisir uniquement par famille de chimie ou par un r\u00e9sultat de laboratoire unique et spectaculaire.<\/p>\n<ul>\n<li><strong>Commencez par le d\u00e9faut, pas par le nom de l'additif :<\/strong> la perte due au mouillage, le crat\u00e8re, la micro-mousse et l'instabilit\u00e9 n\u00e9cessitent souvent des solutions diff\u00e9rentes, m\u00eame au sein de la m\u00eame formule.<\/li>\n<li><strong>V\u00e9rifier la compatibilit\u00e9 \u00e0 la posologie pr\u00e9vue :<\/strong> L'additif le plus performant peut toujours \u00eatre le mauvais choix commercial s'il r\u00e9duit trop la fen\u00eatre de proc\u00e9d\u00e9.<\/li>\n<li><strong>Examiner le stade d'utilisation :<\/strong> Certains produits sont plus utiles pendant la mouture, tandis que d'autres sont plus importants pendant la phase de rel\u00e2chement, de remplissage ou d'application finale.<\/li>\n<li><strong>\u00c9quilibrer le cure ou la qualit\u00e9 du film avec le contr\u00f4le des d\u00e9fauts<\/strong> le bon additif corrige le probl\u00e8me sans sacrifier l'adh\u00e9rence, la brillance ou l'apparence.<\/li>\n<\/ul>\n<h3>R\u00e9f\u00e9rences de produits recommand\u00e9es<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/chlumiaf-094\/\">CHLUMIAF 094<\/a>:<\/strong> Un r\u00e9f\u00e9rence anti-mousse \u00e9quilibr\u00e9 pour les rev\u00eatements \u00e0 base d'eau et de nombreux \u00e9crans de contr\u00f4le de mousse g\u00e9n\u00e9raux.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/chlumiaf-3062\/\">CHLUMIAF 3062<\/a>:<\/strong> Utile lorsque la compatibilit\u00e9 de l'encre d'impression et de l'encre UV est importante dans le tamis anti-mousse.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/chlumiaf-3037\/\">CHLUMIAF 3037<\/a>:<\/strong> Une option de d\u00e9sa\u00e9ration de processus plus puissante lorsque la mousse persistante survit \u00e0 des conditions plus difficiles.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/chlumiwe-3280\/\">CHLUMIWE 3280<\/a>:<\/strong> Un agent mouillant de r\u00e9f\u00e9rence puissant pour les encres, les rev\u00eatements et le mouillage des substrats difficiles.<\/li>\n<\/ul>\n<h3>FAQ pour les acheteurs et les formulateurs<\/h3>\n<p><strong>Pourquoi un additif qui semble puissant dans une \u00e9prouvette \u00e9choue-t-il parfois en production ?<\/strong><br \/>Parce que le cisaillement, la temp\u00e9rature, le substrat et la formule compl\u00e8te peuvent tous modifier la fa\u00e7on dont l'additif se comporte dans des conditions de proc\u00e9d\u00e9 r\u00e9elles.<\/p>\n<p><strong>L'additif le plus agressif doit-il toujours \u00eatre pr\u00e9f\u00e9r\u00e9 ?<\/strong><br \/>Pas habituellement. Le meilleur additif est celui qui r\u00e9sout le d\u00e9faut r\u00e9el tout en pr\u00e9servant la fen\u00eatre d'exploitation s\u00fbre la plus large.<\/p>\n<!-- lc-commercial-end -->","protected":false},"excerpt":{"rendered":"<p>DMF is one of the most widely used solvents in organic synthesis, and is also known as a universal solvent. Today I will share a reaction case with you. The<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[106],"tags":[],"class_list":["post-4885","post","type-post","status-publish","format-standard","hentry","category-laboratory-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>There is a risk of explosion when m-CPBA and DMF react together - Longchang Chemical<\/title>\n<meta name=\"description\" content=\"DMF is one of the most widely used solvents in organic synthesis, and is also known as a universal solvent. 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