{"id":2045,"date":"2025-09-27T11:09:02","date_gmt":"2025-09-27T09:09:02","guid":{"rendered":"https:\/\/antoine-escola.fr\/?p=2045"},"modified":"2025-09-28T12:13:55","modified_gmt":"2025-09-28T10:13:55","slug":"utiliser-un-appareil-de-dean-stark","status":"publish","type":"post","link":"https:\/\/antoine-escola.fr\/index.php\/2025\/09\/27\/utiliser-un-appareil-de-dean-stark\/","title":{"rendered":"Utiliser un appareil de Dean-Stark"},"content":{"rendered":"\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Lorsque l\u2019eau est un produit de r\u00e9action (par exemple lors d\u2019une est\u00e9rification ou d\u2019un ac\u00e9talisation), il est possible de l\u2019\u00e9liminer par distillation h\u00e9t\u00e9roaz\u00e9otropique. Cela facilite la purification du produit d\u2019int\u00e9r\u00eat mais augmente surtout le rendement de la r\u00e9action&nbsp;par d\u00e9placement d\u2019\u00e9quilibre&nbsp;!<\/p>\n\n\n\n<p>On utilise pour cela un appareil de Dean-Stark en pr\u00e9sence d\u2019un solvant non miscible et moins dense que l\u2019eau (cyclohexane, tolu\u00e8ne, etc.). La distillation conduit \u00e0 une vapeur de composition h\u00e9t\u00e9roaz\u00e9otropique&nbsp;qui se reliqu\u00e9fie dans le dispositif. Les deux liquides non-miscibles d\u00e9cantent&nbsp;: il est possible de suivre l\u2019avancement de la r\u00e9action par mesure du volume d\u2019eau gr\u00e2ce aux graduations et de soutirer cette eau par le robinet.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><strong>Vid\u00e9o explicative :<\/strong><\/p>\n\n\n\n<p><em>En cours de cr\u00e9ation !<\/em><\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"403\" height=\"141\" src=\"https:\/\/antoine-escola.fr\/wp-content\/uploads\/2023\/01\/image.png\" alt=\"\" class=\"wp-image-120\" style=\"width:94px;height:33px\" srcset=\"https:\/\/antoine-escola.fr\/wp-content\/uploads\/2023\/01\/image.png 403w, https:\/\/antoine-escola.fr\/wp-content\/uploads\/2023\/01\/image-300x105.png 300w\" sizes=\"auto, (max-width: 403px) 100vw, 403px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"has-text-align-center\">Cet article est mis \u00e0 disposition selon les termes de la <a href=\"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/\" target=\"_blank\" rel=\"noreferrer noopener\">Licence Creative Commons Attribution &#8211; Pas d&rsquo;Utilisation Commerciale &#8211; Pas de Modification 4.0 International<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Lorsque l\u2019eau est un produit de r\u00e9action (par exemple lors d\u2019une est\u00e9rification ou d\u2019un ac\u00e9talisation), il est possible de l\u2019\u00e9liminer par distillation h\u00e9t\u00e9roaz\u00e9otropique. Cela facilite la purification du produit d\u2019int\u00e9r\u00eat mais augmente surtout le rendement de la r\u00e9action&nbsp;par d\u00e9placement d\u2019\u00e9quilibre&nbsp;! On utilise pour cela un appareil de Dean-Stark en pr\u00e9sence d\u2019un solvant non miscible et [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-2045","post","type-post","status-publish","format-standard","hentry","category-manipulation"],"_links":{"self":[{"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/posts\/2045","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/comments?post=2045"}],"version-history":[{"count":2,"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/posts\/2045\/revisions"}],"predecessor-version":[{"id":2063,"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/posts\/2045\/revisions\/2063"}],"wp:attachment":[{"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/media?parent=2045"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/categories?post=2045"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/antoine-escola.fr\/index.php\/wp-json\/wp\/v2\/tags?post=2045"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}