{"id":881,"date":"2026-05-08T09:09:54","date_gmt":"2026-05-08T09:09:54","guid":{"rendered":"https:\/\/www.qiepalmoilplant.com\/?p=881"},"modified":"2026-06-30T03:18:51","modified_gmt":"2026-06-30T03:18:51","slug":"palm-oil-chemical-refining-process","status":"publish","type":"post","link":"https:\/\/www.qiepalmoilplant.com\/fr\/news\/palm-oil-chemical-refining-process.html","title":{"rendered":"Palm Oil Chemical Refining Process"},"content":{"rendered":"<p>The palm oil chemical refining process, also known as alkali refining, removes free fatty acids (FFAs) from crude palm oil (CPO) by reacting them with a chemical base, typically caustic soda (NaOH). This method is the traditional standard and is particularly useful when handling crude oil with fluctuating quality or specific impurities like gossypol that require alkali treatment.<\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-884 aligncenter lazyload\" data-src=\"https:\/\/www.qiepalmoilplant.com\/wp-content\/uploads\/2026\/05\/chemical-palm-oil-refining.webp\" alt=\"\" width=\"500\" height=\"375\" data-srcset=\"https:\/\/www.qiepalmoilplant.com\/wp-content\/uploads\/2026\/05\/chemical-palm-oil-refining.webp 500w, https:\/\/www.qiepalmoilplant.com\/wp-content\/uploads\/2026\/05\/chemical-palm-oil-refining-300x225.webp 300w\" data-sizes=\"(max-width: 500px) 100vw, 500px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 500px; --smush-placeholder-aspect-ratio: 500\/375;\" \/><\/p>\n<h3>Key Stages in Chemical Refining<\/h3>\n<p>Chemical refining (alkali refining) of palm oil involves removing impurities through chemical reactions rather than just physical separation.<\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-883 aligncenter lazyload\" data-src=\"https:\/\/www.qiepalmoilplant.com\/wp-content\/uploads\/2026\/05\/palm-oil-chemical-refining-process.jpg\" alt=\"\" width=\"687\" height=\"500\" data-srcset=\"https:\/\/www.qiepalmoilplant.com\/wp-content\/uploads\/2026\/05\/palm-oil-chemical-refining-process.jpg 687w, https:\/\/www.qiepalmoilplant.com\/wp-content\/uploads\/2026\/05\/palm-oil-chemical-refining-process-300x218.jpg 300w\" data-sizes=\"(max-width: 687px) 100vw, 687px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 687px; --smush-placeholder-aspect-ratio: 687\/500;\" \/><\/p>\n<p><strong><a href=\"https:\/\/www.qiepalmoilplant.com\/fr\/news\/palm-oil-degumming-process.html\/\">Degumming<\/a>:<\/strong> Crude palm oil is mixed with hot water or food-grade phosphoric acid. This converts non-hydratable phospholipids (gums) into hydrated phospholipids, which precipitate and are removed to prevent oxidation and improve stability.<\/p>\n<p><strong>Neutralization (<a href=\"https:\/\/www.qiepalmoilplant.com\/fr\/news\/palm-oil-deacidification-process.html\/\">Deacidification<\/a>):<\/strong> This is the defining stage of chemical refining. An alkali solution, usually caustic soda (NaOH), is added to the oil to react with free fatty acids (FFAs). This reaction forms soapstock, which is then separated from the neutral oil via centrifugation.<\/p>\n<p><strong><a href=\"https:\/\/www.qiepalmoilplant.com\/fr\/news\/palm-oil-bleaching-process.html\/\">Bleaching<\/a> (Decolorization):<\/strong> The neutralized oil is mixed with adsorbents like activated clay (white clay) or activated carbon under a vacuum. This removes color pigments (carotenoids), trace metals, and residual soap particles to improve the oil&#8217;s color and purity.<\/p>\n<p><strong><a href=\"https:\/\/www.qiepalmoilplant.com\/fr\/news\/palm-oil-deodorization-process.html\/\">Deodorization<\/a>:<\/strong> The bleached oil is heated to high temperatures (240\u2103&#8211;260\u2103) under high vacuum. Superheated steam is used to strip away volatile odorous compounds, peroxides, and any remaining trace FFAs to produce a bland, stable final product.<\/p>\n<p><strong><a href=\"https:\/\/www.qiepalmoilplant.com\/fr\/solution\/palm-oil-fractionation-plant.html\/\">Fractionation<\/a> (Optional):<\/strong> The refined oil is often slowly cooled to separate it into liquid palm olein (used for cooking) and solid palm stearin (used for margarine and fats).<\/p>\n<h3>Key Characteristics<\/h3>\n<ul>\n<li>Operates at lower deodorization temperatures compared to physical refining.<\/li>\n<li>Generates soapstock as a by-product.<\/li>\n<li>Requires wastewater treatment due to the washing steps.<\/li>\n<li>Better suited for oils that include a lot of phosphatides.<\/li>\n<\/ul>\n<h3>Chemical Refining Equipment<\/h3>\n<ul>\n<li>Neutralization tanks<\/li>\n<li>Caustic dosing system<\/li>\n<li>Washing centrifuges<\/li>\n<li>Soapstock handling system<\/li>\n<li>Wastewater treatment unit<\/li>\n<\/ul>\n<h3>Physical Refinery Vs. Chemical Refinery<\/h3>\n<p><img decoding=\"async\" class=\"size-full wp-image-740 aligncenter lazyload\" data-src=\"https:\/\/www.qiepalmoilplant.com\/wp-content\/uploads\/2026\/01\/crude-palm-oil-refinery-process.jpg\" alt=\"\" width=\"687\" height=\"447\" data-srcset=\"https:\/\/www.qiepalmoilplant.com\/wp-content\/uploads\/2026\/01\/crude-palm-oil-refinery-process.jpg 687w, https:\/\/www.qiepalmoilplant.com\/wp-content\/uploads\/2026\/01\/crude-palm-oil-refinery-process-300x195.jpg 300w\" data-sizes=\"(max-width: 687px) 100vw, 687px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 687px; --smush-placeholder-aspect-ratio: 687\/447;\" \/><\/p>\n<p><strong>Physical Refining of Palm Oil<\/strong><br \/>\n<a href=\"https:\/\/www.qiepalmoilplant.com\/fr\/news\/palm-oil-physical-refining-process.html\/\">Physical refining<\/a> is also known as steam refining. In degumming process, it utilizes citric acid or food grade phosphoric acid to remove natural gums in the form of phosphatides. Then, in bleaching process, under vacuum, Fuller\u2019s Earth is used to remove colouring matters and adsorb any metal ions. The deacidification and deodorization process is under high temperature and low pressure. By used of live steam, the FFA is stripped of. The steam is then recovered together with the entrained oil is as palm fatty acid distillate. The off-flavors and odours can also be removed from the crude palm oil in the steam distillation process. Before polishing, the refined oil needs to be cooled to 55\u00b0C.<\/p>\n<p><strong>Chemical Refining of Palm Oil<\/strong><br \/>\nIn the chemical refining process, the FFA is removed by neutralisation with caustic soda (sodium hydroxide). This chemical reaction produces neutralised CPO and a soap stock. By used of a high-speed separator, the soap stock can be separated from the oil. Then, through earth bleaching, colour pigments and metal ions are removed from the neutralised oil. Then, in deodorization process, odoriferous matters such as ketones and aldehydes are removed by steam distillation under vacuum.<\/p>\n<p>The choice between physical and chemical refining depends primarily on the quality of the crude palm oil (CPO) and the desired efficiency. Physical refining is the industry standard for palm oil due to its high Free Fatty Acid (FFA) content and low gum content.<\/p>\n<table>\n<tbody>\n<tr>\n<th>Feature<\/th>\n<th>Physical Refining<\/th>\n<th>Chemical Refining<\/th>\n<\/tr>\n<tr>\n<td><strong>Primary Mechanism<\/strong><\/td>\n<td>Steam distillation under vacuum<\/td>\n<td>Chemical neutralization (Caustic Soda)<\/td>\n<\/tr>\n<tr>\n<td><strong>FFA Removal<\/strong><\/td>\n<td>High-temp steam stripping<\/td>\n<td>Reaction with NaOH to form soapstock<\/td>\n<\/tr>\n<tr>\n<td><strong>Oil Yield<\/strong><\/td>\n<td><strong>Higher<\/strong> (~98.9% recovery)<\/td>\n<td><strong>Lower<\/strong> (~98.6% recovery)<\/td>\n<\/tr>\n<tr>\n<td><strong>Main By-product<\/strong><\/td>\n<td>Palm Fatty Acid Distillate (PFAD)<\/td>\n<td>Soapstock (Acid Oil)<\/td>\n<\/tr>\n<tr>\n<td><strong>Chemical Use<\/strong><\/td>\n<td>Low (no caustic soda needed)<\/td>\n<td>High (acid, alkali, and wash water)<\/td>\n<\/tr>\n<tr>\n<td><strong>Environmental Impact<\/strong><\/td>\n<td>Lower (less wastewater)<\/td>\n<td>Higher (more effluent treatment needed)<\/td>\n<\/tr>\n<tr>\n<td><strong>CPO Requirement<\/strong><\/td>\n<td>Requires low-gum, high-quality CPO<\/td>\n<td>Can handle lower quality, high-gum CPO<\/td>\n<\/tr>\n<tr>\n<td><strong>Cost<\/strong><\/td>\n<td>Higher energy (heat), lower chemicals<\/td>\n<td>Higher chemical and waste treatment costs<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>The palm oil chemical refining process, also known as alkali refining, removes free fatty acids (FFAs) from crude palm oil (CPO) by reacting them with a chemical base, typically caustic soda (NaOH). This method is the traditional standard and is particularly useful when handling crude oil with fluctuating quality or specific impurities like gossypol that [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":884,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[17,28],"class_list":["post-881","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-palm-oil-refinery-plant","tag-palm-oil-refining-line"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Palm Oil Chemical Refining Process | Palm Oil Refining<\/title>\n<meta name=\"description\" content=\"The palm oil chemical refining process, also known as alkali refining, removes free fatty acids (FFAs) from crude palm oil (CPO) by reacting them with a chemical base, typically caustic soda 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