RU2000124672A - REMOVAL OF NAPHTHENIC ACIDS FROM OIL RAW MATERIALS AND DISTILLATES - Google Patents

Claims (1)

1. The method of removal of organic acids, heavy metals and sulfur from the source of crude oil, including operations
a) processing the original petroleum feedstock containing organic acids, heavy metals and sulfur, with an ethoxylated amine and water in amounts, under conditions, for a time and at a temperature sufficient to form an emulsion of the water-in-oil amine salt, the ethoxylated amine having the following formula:

where m is from 1 to 10, a R is a hydrocarbon With ₃ - C ₆ ,
b) separating said emulsion from operation a) into several layers, and one of these layers contains treated oil feedstock with a reduced amount of organic acids, heavy metals and sulfur,
C) removing the specified layer from operation b), containing the specified processed oil with a reduced amount of organic acids, heavy metals and sulfur, and layers containing water and a salt of ethoxylated amine
2. The method according to p. 1, characterized in that the specified water is added simultaneously with the specified ethoxylated amine or after it.  3. The method according to p. 1, characterized in that the molecular weight of these organic acids is in the range of 150 - 800. 4. The method according to p. 1, characterized in that the ethoxylated amine is 0.15 - 3.0 molar equivalents based on the amount of organic acids
5. The method according to p. 1, characterized in that said operations a) and b) are performed for a time of from 1 minute to 1 hour.  6. The method according to p. 1, characterized in that it is carried out at a refinery, and this separation is performed in a desalting plant in order to form a layer containing treated petroleum feedstock from which organic acids, heavy metals and sulfur are removed, and a layer containing water and salts of ethoxylated amine. 7. The method according to p. 1, characterized in that it is carried out at the wellhead, and the specified raw materials contained in the full flow from the specified wellhead, the method includes passing the specified full stream to the separator to obtain a gas flow, flow of raw materials, containing naphthenic acids, and a stream of water, contacting, in a countercurrent, the said source of crude oil with said stream of water in the presence of an ethoxylated amine in quantities, for a time and at a temperature sufficient to produce salt and amine, and the specified ethoxylated amine has the following formula

where m is 1 - 10, a R - C ₃ - C ₆ , in the contact column, for a time and at a temperature sufficient to form an unstable oil-in-water emulsion.  8. The method according to p. 1, characterized in that to extract the specified ethoxylated amine, it further includes a) contacting a layer containing a salt of organic acids and an ethoxylated amine, with an acid selected from the group including mineral acids, or carbon dioxide, in an amount and under conditions sufficient for the formation of organic acids and amine salts, if mineral acid is used, or amine carbonate, if carbon dioxide is used, b) separation of the top layer containing organic acids, and in the aqueous layer, c) adding an inorganic base to the lower water layer if in step a) mineral acid is used, or heated at a sufficient temperature and for a sufficient time, if in step a) carbon dioxide is used to bring the pH of the aqueous layer to greater than or equal to 8, d) blowing gas through said aqueous layer to form a foam containing said ethoxylated amine, e) removing said foam containing said ethoxylated amine.  9. The method according to p. 8, characterized in that the specified mineral acid is selected from the group consisting of sulfuric acid, hydrochloric acid, phosphoric acid and mixtures thereof.  10. The method according to p. 1, characterized in that the amount of water is 5 - 10 wt. % based on the amount of raw materials.