{"id":25094,"date":"2026-09-22T10:21:18","date_gmt":"2026-09-22T14:21:18","guid":{"rendered":"https:\/\/sanexen.com\/?p=25094"},"modified":"2026-09-22T10:21:20","modified_gmt":"2026-09-22T14:21:20","slug":"bpc-lheritage-dun-succes-industriel","status":"publish","type":"post","link":"https:\/\/sanexen.com\/fr\/2026\/09\/22\/bpc-lheritage-dun-succes-industriel\/","title":{"rendered":"BPC : l\u2019h\u00e9ritage d\u2019un succ\u00e8s industriel"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><em>Comprendre leur origine, leurs usages et l\u2019\u00e9ch\u00e9ance r\u00e9glementaire de 2026<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pendant des d\u00e9cennies, les biph\u00e9nyles polychlor\u00e9s (BPC) ont repr\u00e9sent\u00e9 tout ce que l\u2019industrie recherchait dans un fluide : stabilit\u00e9, r\u00e9sistance au feu, faible volatilit\u00e9 et isolation \u00e9lectrique. Ces qualit\u00e9s expliquent leur succ\u00e8s et pourquoi, pr\u00e8s d\u2019un demi-si\u00e8cle apr\u00e8s leur interdiction au Canada, ils demeurent un enjeu actuel. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D\u2019une d\u00e9couverte de laboratoire \u00e0 un produit industriel <\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les BPC ont \u00e9t\u00e9 synth\u00e9tis\u00e9s pour la premi\u00e8re fois en 1881 par les chimistes allemands Hugo Schmidt et Georg Schultz, par chloration du biph\u00e9nyle. La production \u00e0 grande \u00e9chelle d\u00e9bute toutefois bien plus tard : la Swann Chemical Company en fabrique industriellement d\u00e8s 1929, puis Monsanto acquiert l\u2019entreprise en 1935 et commercialise divers m\u00e9langes sous le nom Aroclor. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Un Aroclor n\u2019est pas une mol\u00e9cule unique, mais un assemblage de plusieurs cong\u00e9n\u00e8res, c\u2019est-\u00e0-dire des BPC dont le nombre et la position des atomes de chlore varient. Pour la plupart des Aroclors, les deux derniers chiffres indiquent approximativement la teneur massique en chlore : 1242 correspond \u00e0 environ 42 %, 1254 \u00e0 54 % et 1260 \u00e0 60 %. Plus cette valeur augmente, plus le m\u00e9lange tend \u00e0 \u00eatre lourd, visqueux et peu volatil. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>O\u00f9 peut-on encore trouver des BPC?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Leur stabilit\u00e9 et leur faible inflammabilit\u00e9 ont favoris\u00e9 leur emploi comme fluides isolants et caloporteurs dans les transformateurs et les condensateurs. Les b\u00e2timents et \u00e9quipements ant\u00e9rieurs aux ann\u00e9es 1980 m\u00e9ritent donc une attention particuli\u00e8re : transformateurs humides, condensateurs, ballasts de lampes fluorescentes et certains appareils \u00e9lectriques peuvent encore en contenir. Les BPC ont aussi \u00e9t\u00e9 ajout\u00e9s aux peintures, aux produits de calfeutrage et de scellement ainsi qu\u2019\u00e0 l\u2019asphalte, notamment pour am\u00e9liorer la souplesse et la r\u00e9sistance au feu ou \u00e0 la corrosion. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Une stabilit\u00e9 devenue un probl\u00e8me mondial<\/strong> <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dans l\u2019environnement, les BPC r\u00e9sistent \u00e0 la d\u00e9gradation pendant des d\u00e9cennies. Peu solubles dans l\u2019eau mais tr\u00e8s solubles dans les graisses, ils s\u2019accumulent dans les tissus vivants et leur concentration peut augmenter le long de la cha\u00eene alimentaire. Certains voyagent aussi sur de longues distances par l\u2019air, l\u2019eau et les particules. Une combustion incontr\u00f4l\u00e9e peut en outre produire des dioxines et des furanes hautement canc\u00e9rog\u00e8nes. Cette combinaison de persistance, de bioaccumulation et de toxicit\u00e9 a conduit \u00e0 leur inscription parmi les polluants organiques persistants vis\u00e9s par la Convention de Stockholm. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Le 31 d\u00e9cembre 2026 : une \u00e9ch\u00e9ance \u00e0 pr\u00e9parer<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Au Canada, la fin d\u2019utilisation de plusieurs cat\u00e9gories d\u2019\u00e9quipements contenant des BPC est fix\u00e9e au 31 d\u00e9cembre 2026. L\u2019\u00e9ch\u00e9ance vise notamment certains \u00e9quipements contenant de 50 \u00e0 moins de 500 mg\/kg de BPC, les ballasts et transformateurs sur poteaux \u00e0 partir de 50 mg\/kg, ainsi que divers \u00e9quipements de production, de transport ou de distribution d\u2019\u00e9lectricit\u00e9. Une utilisation prolong\u00e9e peut \u00eatre permise dans certaines circonstances, sous r\u00e9serve d\u2019une approbation minist\u00e9rielle; certaines activit\u00e9s autoris\u00e9es font aussi exception. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le retrait du service n\u2019est que le d\u00e9but : l\u2019\u00e9quipement et les liquides peuvent \u00eatre soumis \u00e0 des exigences de stockage, d\u2019\u00e9tiquetage, de destruction et de rapport. Pour les propri\u00e9taires d\u2019actifs, le bon r\u00e9flexe est d\u2019identifier les appareils \u00e0 risque, de confirmer les concentrations et de planifier une fili\u00e8re conforme. Dans le prochain volet, nous verrons comment la d\u00e9chloration peut d\u00e9truire les BPC, r\u00e9cup\u00e9rer l\u2019huile et prolonger la vie utile du transformateur sans remplacer automatiquement un \u00e9quipement encore fonctionnel. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Sources de validation <\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list has-custom-css wp-custom-css-bfb701fe\">\n<li><a href=\"https:\/\/www.canada.ca\/fr\/environnement-changement-climatique\/services\/polluants\/bpc-dans-environnement\/reglements-comment-ils-appliquent-a-vous.html\">Environnement et Changement climatique Canada \u2014 \u00c0 propos des BPC<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/laws-lois.justice.gc.ca\/fra\/reglements\/DORS-2008-273\/\">R\u00e8glement sur les BPC (DORS\/2008-273)<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.pops.int\/Implementation\/IndustrialPOPs\/PCB\/Overview\/tabid\/273\/Default.aspx\">Convention de Stockholm \u2014 Programme sur les BPC<\/a><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Comprendre leur origine, leurs usages et l\u2019\u00e9ch\u00e9ance r\u00e9glementaire de 2026 Pendant des d\u00e9cennies, les biph\u00e9nyles polychlor\u00e9s (BPC) ont repr\u00e9sent\u00e9 tout ce que l\u2019industrie recherchait dans un fluide : stabilit\u00e9, r\u00e9sistance au feu, faible volatilit\u00e9 et isolation \u00e9lectrique. Ces qualit\u00e9s expliquent leur succ\u00e8s et pourquoi, pr\u00e8s d\u2019un demi-si\u00e8cle apr\u00e8s leur interdiction au Canada, ils demeurent un [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":25095,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[200],"tags":[],"class_list":["post-25094","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>BPC : l\u2019h\u00e9ritage d\u2019un succ\u00e8s industriel | SANEXEN<\/title>\n<meta name=\"description\" content=\"Comprendre l&#039;origine des BPC, leurs risques et l&#039;\u00e9ch\u00e9ance canadienne du 31 d\u00e9cembre 2026 pour le retrait des \u00e9quipements contamin\u00e9s.\" \/>\n<meta name=\"robots\" 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