{"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\/pt\/cpba-and-dmf-no-together\/","title":{"rendered":"H\u00e1 um risco de explos\u00e3o quando o m-CPBA e o DMF reagem juntos"},"content":{"rendered":"<!-- lc-qa-start -->\n<p><strong>Quick answer:<\/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>O DMF \u00e9 um dos solventes mais usados em s\u00edntese org\u00e2nica e tamb\u00e9m \u00e9 conhecido como solvente universal. Hoje compartilharei com voc\u00eas um caso de rea\u00e7\u00e3o. O uso combinado de m-CPBA e DMF tamb\u00e9m \u00e9 potencialmente perigoso. O m-CPBA, tamb\u00e9m conhecido como \u00e1cido m-cloroperoxibenz\u00f3ico, \u00e9 um tipo de oxidante org\u00e2nico muito usado em qu\u00edmica org\u00e2nica. Em termos relativos, ele \u00e9 relativamente seguro. No entanto, o campo da qu\u00edmica \u00e9 repleto de inc\u00f3gnitas. Um acidente relatado na literatura compartilhada hoje est\u00e1 relacionado ao uso misto de m-CPBA e DMF, e est\u00e1 diretamente relacionado \u00e0s seguintes transforma\u00e7\u00f5es qu\u00edmicas.<\/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>Sintetizadores da Fujisawa Pharmaceutical Company no Jap\u00e3o usaram o m-CPBA para oxidar o enxofre em sulf\u00f3xido usando DMF como solvente em escala piloto. Os sintetizadores primeiro misturaram 6,3 litros de DMF e 11,0 kg de m-CPBA e agitaram os dois por 2 horas. Em seguida, filtrou-se para obter uma solu\u00e7\u00e3o l\u00edmpida, e a solu\u00e7\u00e3o l\u00edmpida foi adicionada \u00e0 solu\u00e7\u00e3o de rea\u00e7\u00e3o org\u00e2nica. Quando o processo de gotejamento \u00e9 realizado por 1 hora, a solu\u00e7\u00e3o DMF de m-CPBA aumenta repentinamente e o g\u00e1s \u00e9 liberado. E, de repente, explodiu. O autor deste artigo (Org. Proc. Res. Dev.) descreve resumidamente o processo de rea\u00e7\u00e3o conforme a figura a seguir.<\/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>A equipe sint\u00e9tica imediatamente procurou a causa do acidente e da explos\u00e3o. Eles especularam que provavelmente o acidente foi causado por mat\u00e9ria insol\u00favel, e a mat\u00e9ria insol\u00favel era exatamente o m-CBPO. Essa mat\u00e9ria insol\u00favel pode ser uma impureza da pr\u00f3pria mat\u00e9ria-prima m-CPBA ou pode ser gerada gradualmente no sistema de rea\u00e7\u00e3o. O autor deste artigo conduziu uma s\u00e9rie de experimentos de verifica\u00e7\u00e3o. O autor descobriu que o conte\u00fado de m-CBPO na mat\u00e9ria-prima m-CPBA \u00e9 de apenas 0,2%. Al\u00e9m disso, os experimentos de DTA e IST confirmaram que o m-CPBA derrete a 89 graus e \u00e9 est\u00e1vel a menos de 97 graus. O autor ent\u00e3o realizou um estudo de DTA na solu\u00e7\u00e3o DMF de m-CPBA, e os resultados mostraram que a temperatura de decomposi\u00e7\u00e3o do m-CPBA era de 83 graus. Os experimentos acima mostram que o DMF pode afetar amplamente o ponto cr\u00edtico da temperatura de decomposi\u00e7\u00e3o do m-CPBA. Portanto, o autor acredita que o solvente DMF desempenhou um papel importante nesse acidente.<\/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>O autor descobriu ent\u00e3o que, \u00e0 medida que a temperatura aumentava, o conte\u00fado de m-CBPO aumentava significativamente, e a pesquisa de DTA mostrou que, quando a temperatura atinge mais de 125 graus, pode-se prever uma explos\u00e3o muito s\u00e9ria.<\/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>Em seguida, o autor realizou um estudo de ARC da solu\u00e7\u00e3o DMF de m-CPBA, um estudo de concentra\u00e7\u00e3o e um estudo de estabilidade mista de m-CPBA e m-CPBO. A conclus\u00e3o final \u00e9 que s\u00e3o necess\u00e1rios 185 minutos para que a solu\u00e7\u00e3o DMF de m-CPBA aumente lentamente de 26 graus para 70 graus e, em seguida, aumente rapidamente para 200 graus em alguns minutos ou algo semelhante. Al\u00e9m disso, a solu\u00e7\u00e3o DMF de m-CPBA mais concentrada se aquece mais rapidamente. O experimento misto de m-CPBA e m-CPBO mostra que a temperatura aumenta lentamente no in\u00edcio, mas depois de apenas 95 minutos, haver\u00e1 um aumento acentuado da temperatura.<\/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>Em resumo, o autor deste artigo apresenta o processo geral da explos\u00e3o. Primeiro, a forma\u00e7\u00e3o de m-CPBO leva a um aumento na temperatura e, em seguida, a forma\u00e7\u00e3o de uma grande quantidade de m-CPBO causa uma explos\u00e3o em altas temperaturas. No final, o autor usou diclorometano DCM como solvente para resolver esse problema com sucesso. Os experimentos de DTA mostram que, usando o diclorometano como solvente, n\u00e3o h\u00e1 exotermia ao longo do tempo.<\/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>Fa\u00e7a experimentos com dezenas de milhares de pessoas, primeiro a seguran\u00e7a! <strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/dimethyl-sulfoxide-cas-67-68-5\/\" target=\"_blank\" rel=\"noreferrer noopener\">DMSO<\/a><\/strong> e DMF s\u00e3o solventes fortemente polares, embora tenham boa solubilidade para org\u00e2nicos, eles tamb\u00e9m s\u00e3o uma faca de dois gumes!<\/p>\n\n\n<!-- lc-commercial-start -->\n<h2>How buyers usually evaluate coating and ink additives<\/h2>\n<p>Additive selection is usually most effective when the team defines the defect first and then screens compatibility, dosage range, and process stage. That is often much more reliable than choosing only by chemistry family or by a single dramatic lab result.<\/p>\n<ul>\n<li><strong>Start from the defect, not the additive name:<\/strong> wetting loss, crater, microfoam, and instability often need different solutions even inside the same formula.<\/li>\n<li><strong>Check compatibility at the intended dosage:<\/strong> the strongest additive can still be the wrong commercial choice if it narrows the process window too much.<\/li>\n<li><strong>Review the stage of use:<\/strong> some products are most useful during grind, while others matter more during let-down, filling, or final application.<\/li>\n<li><strong>Balance cure or film quality with defect control:<\/strong> the right additive fixes the problem without sacrificing adhesion, gloss, or appearance.<\/li>\n<\/ul>\n<h3>Recommended product references<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumiaf-094\/\">CHLUMIAF 094<\/a>:<\/strong> A balanced defoamer reference for waterborne coatings and many general foam-control screens.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumiaf-3062\/\">CHLUMIAF 3062<\/a>:<\/strong> Useful when printing-ink and UV-ink compatibility matter in the defoaming screen.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumiaf-3037\/\">CHLUMIAF 3037<\/a>:<\/strong> A stronger process-defoaming option when persistent foam survives harsher conditions.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/pt\/product\/chlumiwe-3280\/\">CHLUMIWE 3280<\/a>:<\/strong> A strong wetting-agent reference for inks, coatings, and difficult substrate wetting.<\/li>\n<\/ul>\n<h3>FAQ for buyers and formulators<\/h3>\n<p><strong>Why does an additive that looks powerful in a beaker sometimes fail in production?<\/strong><br \/>Because shear, temperature, substrate, and the full formula can all change the way the additive performs under real process conditions.<\/p>\n<p><strong>Should the most aggressive additive always be preferred?<\/strong><br \/>Not usually. The best additive is the one that solves the real defect while preserving the broadest safe operating window.<\/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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