{"id":17653,"date":"2022-10-19T03:00:26","date_gmt":"2022-10-19T08:00:26","guid":{"rendered":"https:\/\/www.insta-pro.com\/blog\/non-classe\/extraction-dhuile-101\/"},"modified":"2026-01-07T13:49:28","modified_gmt":"2026-01-07T19:49:28","slug":"extraction-dhuile-101","status":"publish","type":"post","link":"https:\/\/instapro.spinuhost.com\/fr\/blog\/ingenierie-et-procede-dextrusion\/extraction-dhuile-101\/","title":{"rendered":"Extraction d’huile 101"},"content":{"rendered":"

Les huiles alimentaires obtenues \u00e0 partir de graines ol\u00e9agineuses telles que le soja et le canola sont utilis\u00e9es pour la friture, et comme ingr\u00e9dients pour la pr\u00e9paration de p\u00e2tisseries et de condiments. Les huiles alimentaires peuvent aussi \u00eatre utilis\u00e9es pour am\u00e9liorer la texture et l’ar\u00f4me des aliments. Avant la transformation de l’huile sous une forme utilisable, elle est d’abord extraite des graines ol\u00e9agineuses.<\/p>\n

Alors que l’extraction de liquides surcritique (SFE) est de plus en plus utilis\u00e9e pour l’extraction d’huile, les deux m\u00e9thodes d’extraction les plus courantes demeurent la pression d’huile m\u00e9canique et l’extraction par solvant. Les deux m\u00e9thodes (pression d’huile et extraction par solvant), offrent un certain gradient qui favorise l’expulsion de l’huile contenue dans les graines ol\u00e9agineuses. L’extraction par solvant utilise un solvant, par exemple l\u2019hexane, pour cr\u00e9er un gradient de concentration (entre la mati\u00e8re de la graine et le solvant) qui expulse l’huile contenue dans la graine dans le solvant. Au lieu d’un gradient de concentration, la pression m\u00e9canique utilise un gradient de pression pour expulser l’huile de la graine (voir Figure 1). Un avantage majeur de la m\u00e9thode de pression d’huile, par rapport \u00e0 l\u2019extraction par solvant, est que la pression d’huile est un processus totalement sans produits chimiques.<\/p>\n

\"\"<\/p>\n

Figure 1. Force motrice pour le transfert massique dans l\u2019extraction d’huile.<\/em><\/p>\n

 <\/p>\n

Une presse \u00e0 huile est l’\u00e9quipement de choix pour la pression d’huile m\u00e9canique. La presse \u00e0 huile est constitu\u00e9e d’une vis rotative contenue dans une cage\/un cylindre (voir Figure 2). La vis tourne pour transporter la mati\u00e8re depuis l’entr\u00e9e de la presse \u00e0 huile vers la sortie, tout en exer\u00e7ant une pression sur la mati\u00e8re des graines ol\u00e9agineuses. La cage\/le cylindre poss\u00e8de de petits trous qui permettent \u00e0 l’huile de s\u2019\u00e9couler tout en conservant la mati\u00e8re solide r\u00e9siduelle, confin\u00e9e dans la cage\/le cylindre.<\/p>\n

\"\"<\/p>\n

Figure 2. Section d’un cylindre de presse \u00e0 huile<\/em><\/p>\n

 <\/p>\n

La quantit\u00e9 d’huile exprim\u00e9e des graines ol\u00e9agineuses d\u00e9pend de la concentration d’huile dans les graines et de l’amplitude du gradient de pression. Plus la concentration d’huile est faible, plus le gradient de pression doit \u00eatre \u00e9lev\u00e9. Par cons\u00e9quent, les presses \u00e0 huile sont con\u00e7ues de telle sorte que l\u2019\u00e9cart entre la vis et la cage\/le cylindre diminue progressivement au fur et \u00e0 mesure que la mati\u00e8re est transf\u00e9r\u00e9e depuis l’entr\u00e9e de la presse \u00e0 huile vers la sortie. Cela garantit que le gradient de pression appliqu\u00e9 \u00e0 la mati\u00e8re des graines ol\u00e9agineuses augmente au fur et \u00e0 mesure que la mati\u00e8re est transf\u00e9r\u00e9e depuis l’entr\u00e9e vers le c\u00f4t\u00e9 de refoulement de la presse \u00e0 huile.<\/p>\n

L’efficacit\u00e9 de l’extraction d’huile est am\u00e9lior\u00e9e si la presse \u00e0 huile est combin\u00e9e avec une extrudeuse plac\u00e9e en amont de la presse \u00e0 huile. L’extrudeuse utilise le processus de cuisson par extrusion<\/a> pour briser les parois cellulaires des graines ol\u00e9agineuses afin de lib\u00e9rer l’huile contenue dans les cellules. Cela facilite l\u2019expulsion de l’huile des graines ol\u00e9agineuses. Les lignes Insta-Pro ExPress\u00ae sont con\u00e7ues pour optimiser l’efficacit\u00e9 du processus de pression d’huile.<\/p>\n

La pression d’huile est une \u00e9tape importante dans de nombreuses op\u00e9rations, car elle peut \u00eatre conserv\u00e9e et ajout\u00e9e \u00e0 d’autres ingr\u00e9dients, ce qui r\u00e9duit les co\u00fbts d’achat d’huile \u00e0 d\u2019autres fournisseurs, ou elle peut \u00eatre commercialis\u00e9e sur d’autres march\u00e9s. Pour plus de d\u00e9tails sur les conditions requises, les tarifs et toute autre question concernant la pression d’huile, veuillez contacter une personne de notre \u00e9quipe de vente ou de service d\u00e8s aujourd\u2019hui !<\/p>\n","protected":false},"excerpt":{"rendered":"

Les huiles alimentaires obtenues \u00e0 partir de graines ol\u00e9agineuses telles que le soja et le canola sont utilis\u00e9es pour la friture, et comme ingr\u00e9dients pour la pr\u00e9paration de p\u00e2tisseries et de condiments. Les huiles alimentaires peuvent aussi \u00eatre utilis\u00e9es pour am\u00e9liorer la texture et l’ar\u00f4me des aliments. Avant la transformation de l’huile sous une forme […]<\/p>\n","protected":false},"author":57,"featured_media":15663,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[8610],"tags":[8904,638,573,732],"class_list":["post-17653","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ingenierie-et-procede-dextrusion","tag-oil-press-fr","tag-procede-express-fr","tag-transformation-de-sous-produits","tag-oilseed-processing-fr"],"acf":[],"yoast_head":"\nExtraction d'huile 101 - Insta-Pro<\/title>\n<meta name=\"description\" content=\"Les presses \u00e0 huile m\u00e9caniques offrent une solution sans produits chimiques permettant de cr\u00e9er un ingr\u00e9dient de haute qualit\u00e9 pour une utilisation dans les aliments destin\u00e9s aux animaux et les applications alimentaires.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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