{"id":829,"date":"2026-03-31T07:11:36","date_gmt":"2026-03-31T07:11:36","guid":{"rendered":"https:\/\/www.qiepalmoilplant.com\/?p=829"},"modified":"2026-05-08T07:31:12","modified_gmt":"2026-05-08T07:31:12","slug":"palm-oil-bleaching-process","status":"publish","type":"post","link":"https:\/\/www.qiepalmoilplant.com\/fr\/news\/palm-oil-bleaching-process.html","title":{"rendered":"Palm Oil Bleaching Process"},"content":{"rendered":"

Palm oil bleaching process is a critical stage in the palm oil refining sequence, primarily used to remove pigments (like carotenoids and chlorophyll), trace metals, and oxidation products. This transformation changes the crude palm oil from a deep red\/orange to a light yellow color.<\/p>\n

\"\"<\/p>\n

Key Steps in the Bleaching Process<\/h3>\n

Pre-Treatment (Degumming):<\/strong> Before bleaching, crude palm oil is degummed\u2014usually with phosphoric acid\u2014to remove phospholipids and trace metals that interfere with the bleaching agent.
\nAddition of Bleaching Agent:<\/strong> A bleaching agent, most commonly acid-activated bleaching earth (bentonite or fuller’s earth), is added to the oil. Activated carbon may also be added to help remove darker pigments like chlorophyll.
\nMixing and Reaction:<\/strong> The oil and clay mixture is heated to 90\u2013125\u00b0C and agitated for 15\u201345 minutes. This occurs under a vacuum (50\u2013125 mmHg) to prevent oil oxidation and improve the efficiency of the clay.
\nFiltration:<\/strong> The mixture is passed through a filtration system (such as vertical leaf filters or plate presses) to separate the clean oil from the “spent” clay.
\nCooling and Testing:<\/strong> The bleached oil is cooled and tested for quality markers like color and residual phosphorus before moving to the final deodorization stage.<\/p>\n

Bleaching Process of Palm Oil Refinery<\/h3>\n
    \n
  • To avoid the influence by air and consume less clay, earth bleaching is processed under vacuum;<\/li>\n
  • The dosage of clay is based on the color requirement of final palm oil;<\/li>\n
  • Bleached oil is flushed through closed stainless steel filtration discs for less residue in the meal.<\/li>\n
  • To ensure stable production and easy operation, the filter is controlled automatically.<\/li>\n<\/ul>\n

    \"\"<\/p>\n

    Factors affecting the palm oil bleaching process<\/h3>\n

    The effectiveness of the palm oil bleaching process depends on several key factors:<\/p>\n

      \n
    • Temperature and Humidity:<\/strong>\u00a0Crude palm oils were bleached at\u00a0105 \u00b0 C,\u00a0for\u00a030\u00a0min at\u00a050\u00a0mmHg pressure.\u00a0Afterwards,\u00a0a deodorization step was performed at\u00a0260 \u00b0 C, 3\u00a0mbar, 1.5%\u00a0steam for\u00a060\u00a0min.\u00a0You need to carefully control the temperature and humidity during the bleaching process to ensure optimal absorption.<\/li>\n
    • Quality of Refinery Machines:\u00a0<\/strong>High-quality refinery machines are crucial for efficient bleaching.\u00a0Make sure you use reliable and well-maintained equipment.<\/li>\n
    • Structure and Type of Bleaching Earth:\u00a0<\/strong>The type and structure of the bleaching earth you use significantly impact the bleaching process.\u00a0Choose the appropriate bleaching earth to achieve the best results.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Palm oil bleaching process is a critical stage in the palm oil refining sequence, primarily used to remove pigments (like carotenoids and chlorophyll), trace metals, and oxidation products. This transformation changes the crude palm oil from a deep red\/orange to a light yellow color. Key Steps in the Bleaching Process Pre-Treatment (Degumming): Before bleaching, crude […]<\/p>\n","protected":false},"author":1,"featured_media":869,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[17],"class_list":["post-829","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-palm-oil-refinery-plant"],"acf":[],"yoast_head":"\nPalm Oil Bleaching Process | Palm Oil Refining<\/title>\n<meta name=\"description\" content=\"Palm oil bleaching process is a critical stage in the palm oil refining sequence, primarily used to remove pigments (like carotenoids and chlorophyll), trace metals, and oxidation products.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.qiepalmoilplant.com\/fr\/news\/palm-oil-bleaching-process.html\/\" 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