Process Section – Daily Hydrogenation Process Knowledge Question No. 047

Also known as hydroprocessing, it is one of the most important refining methods for petroleum products. It refers to the process of converting harmful impurities such as sulfur, oxygen, and nitrogen in oils into corresponding hydrogen sulfide, water, and ammonia under hydrogen pressure and in the presence of a catalyst, thereby removing these impurities. It also involves the hydrogenation of olefins and dienes to saturate them, as well as the partial hydrogenation of aromatics, in order to improve the quality of the oils. Sometimes, hydrorefining refers to the refining and modification of light oils, while hydrotreating refers to the refining and desulfurization of heavy oils. Refinery hydrorefining is actually a hydrocracking process that takes place under high pressure in the presence of hydrogen; it requires a catalyst to convert heavy feedstocks into gasoline, kerosene, diesel, and lubricating oils.

It refers to the process of converting harmful impurities such as sulfur, oxygen, and nitrogen in oils into corresponding hydrogen sulfide, water, and ammonia under hydrogen pressure and in the presence of a catalyst, thereby removing these impurities. It also involves the hydrogenation of olefins and dienes to saturate them, as well as the partial hydrogenation of aromatics, in order to improve the quality of the oils. Sometimes, hydrorefining refers to the refining and modification of light oils, while hydrotreating refers to the refining and desulfurization of heavy oils. Refinery hydrorefining is actually a hydrocracking process that takes place under high pressure in the presence of hydrogen; it requires a catalyst to convert heavy feedstocks into gasoline, kerosene, diesel, and lubricating oils.

It is a hydrocracking process that takes place under high pressure in the presence of hydrogen; a catalyst is required to convert heavy feedstocks into gasoline, kerosene, diesel, and lubricating oils.

Hydrorefining takes place under specific conditions of temperature, pressure, hydrogen-to-oil ratio, and space velocity; wherein the feed oil and hydrogen pass through a catalyst bed in a reactor, and under the action of the hydrorefining catalyst, non-hydrocarbon compounds such as sulfur, nitrogen, and oxygen contained in the oil are converted into corresponding hydrocarbons as well as hydrogen sulfide, ammonia, and water, which are easier to remove.

Also known as hydroprocessing, it is one of the most important refining methods for petroleum products. It refers to the process of converting harmful impurities such as sulfur, oxygen, and nitrogen in oils into corresponding hydrogen sulfide, water, and ammonia under hydrogen pressure and in the presence of a catalyst, thereby removing these impurities. It also involves the hydrogenation of olefins and dienes to saturate them, as well as the partial hydrogenation of aromatics, in order to improve the quality of the oils. Sometimes, hydrorefining refers to the refining and modification of light oils, while hydrotreating refers to the refining and desulfurization of heavy oils. Refinery hydrorefining is actually a hydrocracking process that takes place under high pressure in the presence of hydrogen; it requires a catalyst to convert heavy feedstocks into gasoline, kerosene, diesel, and lubricating oils.

I. Olefin saturation: It refers to the process by which unsaturated monoenes and dienes are converted into… through hydrogenation； For example: 1. R-C=C-R+H2→R-C-C-R.. ； 2. R-C=C-C=C-R’+H2→R- ； II. Desulfurization reaction ； Under the reaction conditions, the sulfur-containing compounds in the feedstock undergo hydrogenolysis and are converted into a phase ； Removal ； For example: Thiol: R-S-H + H2 → R-H2

Hydrorefining takes place under specific conditions of temperature, pressure, hydrogen-to-oil ratio, and space velocity; wherein the feed oil and hydrogen pass through a catalyst bed in a reactor, and under the action of the hydrorefining catalyst, non-hydrocarbon compounds such as sulfur, nitrogen, and oxygen contained in the oil are converted into corresponding hydrocarbons as well as hydrogen sulfide, ammonia, and water, which are easier to remove.

Hydrorefining is a process in which, under specific operational conditions and with the help of catalysts, the feed oil comes into contact with H2; this allows for the removal of impurities such as sulfur, nitrogen, oxygen, and metals from the feed oil, as well as the saturation of unsaturated hydrocarbons to improve the performance of the oil product.

The hydrorefining process involves the removal of sulfur, nitrogen, and oxygen atoms from sulfur-containing, nitrogen-containing, and oxygen-containing compounds in the feedstock, under the action of hydrogen along with specific temperature, pressure conditions, and catalysts, thereby improving the quality of the oil. For secondary processed products, this process enables the hydrogenation and saturation of olefins, dienes, and aromatics in the oil. Compared to other oil refining methods, hydrorefining features high yields and excellent product quality. Coking gasoline and diesel are products obtained through secondary processing of crude oil; they contain high levels of sulfur, nitrogen, oxides, and olefins. These impurities are highly unstable during oil storage, causing a rapid increase in gum formation and a sharp darkening of color, which severely affects the safety of oil storage as well as its combustion properties. Therefore, secondary processed oil products must undergo hydrorefining to remove sulfur, nitrogen, oxygen-containing compounds, and unstable substances, in order to obtain high-quality products with good stability.

Hydrorefining is a process in which, under specific operational conditions and with the help of catalysts, the feed oil comes into contact with H2; this allows for the removal of impurities such as sulfur, nitrogen, oxygen, and metals from the feed oil, as well as the saturation of unsaturated hydrocarbons to improve the performance of the oil product.