{"id":59215,"date":"2025-11-04T03:55:54","date_gmt":"2025-11-04T00:55:54","guid":{"rendered":"https:\/\/geoconversation.org\/shorts\/how-does-oil-refining-work\/"},"modified":"2025-11-04T03:55:54","modified_gmt":"2025-11-04T00:55:54","slug":"how-does-oil-refining-work","status":"publish","type":"shorts","link":"https:\/\/geoconversation.org\/en\/shorts\/how-does-oil-refining-work\/","title":{"rendered":"How does oil refining work?"},"content":{"rendered":"\n

It’s hard to believe that the clear gasoline in the tank was once a thick, dark mass from the depths of the Earth. Today, oil is used to make not only fuel, but also plastics, medicines, cosmetics, clothing – more 70 different products<\/strong>, without which it is impossible to imagine life.<\/p>\n\n\n

Let’s look at how this process works and what happens to oil at an oil refinery: how energy, heat and materials for everything from airplanes to toothpaste are obtained from heavy raw materials.<\/p>\n\n

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\"Traces<\/a>
Oil pollution on the surface of the ocean. Photo: Woods Hole Oceanographic Institution by Pinaria Caprarius <\/figcaption><\/figure>\n<\/div>\n\n

What is the oil refining process and why is it needed?<\/h2>\n\n\n

Crude oil is a thick mixture of thousands of hydrocarbons. In order for it to turn into fuel, plastic, medicine or shampoo, it must be \u201cdisassembled\u201d into its component parts and \u201creassembled\u201d – this time in the form of useful products. This is what oil refineries (ORPs) do. At such enterprises heavy oil passes<\/a> through furnaces, columns and reactors, where molecules change structure under the influence of temperature, pressure and catalysts.\u00a0<\/p>\n\n\n

The recycling process is a whole chain of physical and chemical processes. It begins with the purification of oil from water and salts, continues with separation into fractions and ends with reactions that improve the quality of the fuel and convert heavy residues into new products. Factories all over the world operate according to these principles – from Omsk to Texas City.<\/p>\n\n\n

Methanol production in fields – PNIPU technology<\/a> \u2014 how using associated gas instead of burning it reduces emissions and makes processing more environmentally friendly.<\/p>\n\n\n

Main stages and processes of oil refining<\/h2>\n\n\n

Before oil is turned into gasoline, diesel or raw materials for plastics, it goes through several technological stages.<\/p>\n\n\n

Oil preparation: removal of water, salts and impurities<\/h3>\n\n\n

The oil entering the plant contains water, salts and sulfur. These impurities can cause corrosion and equipment damage. Therefore, the first stage of processing is cleaning.<\/p>\n\n\n

Raw materials heat up<\/a>, add demulsifiers and place in an electric field. Under its influence, microdroplets of water stick together and settle – in much the same way as condensation forms on the lid of a pan. As a result, moisture and salts are removed, and the oil becomes ready for distillation.<\/p>\n\n\n

\"Scheme<\/a>
Diagram of the installation used for oil desalting. Source: PROrefinery<\/a><\/figcaption><\/figure>\n\n\n

Primary oil refining processes: atmospheric-vacuum distillation<\/h3>\n\n\n

At this stage, the oil is divided into fractions based on boiling point. First her heat up<\/a> to approximately 360 \u00b0C, after which it enters the column. Light fractions (gases, gasoline, kerosene) rise to the top, heavy fractions (diesel and fuel oil) remain at the bottom.\u00a0<\/p>\n\n\n

Secondary oil refining processes: cracking, reforming and isomerization<\/h3>\n\n\n

After distillation, some of the heavy fractions cannot be used directly. Then let’s get going enter<\/a> chemical processes of oil refining that improve the quality of fuel.<\/p>\n\n\n