SU727666A1 - Composition for oil dehydration and desalinization - Google Patents

Description

(54) COMPOSITION FOR WASHING AND REFINING OIL

The invention relates to the field of oil preparation and can be used both in field oil treatment plants and in oil refineries in the process of deep oil desalting. A composition for the dehydration and desalting of petroleum is known, including an aqueous solution of polyacrylamide II. However, this composition does not have sufficiently high efficiency (a) and the preparation of a solution of polyacrylamide of the desired concentration is not technologically efficient in field conditions, especially in winter (a special, powerful, high-speed mixer with cutting knives is required). A known composition for the dehydration and desalting of oil, containing the following quantities of ingredients, wt.%: Surface-active 0.05-0.1 substance 0.5-2.6 Liquid glass Partially hydrolyzed polyacrylamide (8% active 1.0-2, 9 substances) Up to 100 2 When using this COMPOSITION, a significant amount of salts remain in the oil preparation units, and the use of polyacrylamide for this purpose is a technological step in the process of preparing ingredient solutions; a given concentration. The aim of the invention is to improve the desalting properties of the composition. The goal is achieved by a composition for the dehydration and desalting of oil, containing a surface-active demulsifier, water glass, water, polyethylene polyamino-polydicarboxylic acid of the formula l dHz-CiHr-N- "n, J moi - Sn-Sob where n 5-12: with the following the ratio of components, weight. %: Surfactant demulsifier 0.03-0.1 Liquid glass 0.008-0.128 Polyethylenepolyamides for argon acid 0.003-0.048 Water Up to 100. Any demulsifier reagents can be used as a surfactant demulsifier water soluble and oil soluble. Substance-type substances have a better effect, for example, disolvan-4411, separaol-25. Metasilicate, di- and trisilicate can be used as a soluble glass. Preferred. Module lies in the range of 1-3. In the desalting process, the aqueous solution is mixed with the oil. It can be carried out by dispensing the proposed composition into an oil pipeline, in settling tanks with a stirrer, or by passing oil through a composition of the above composition in tanks. Desalting with the proposed composition can be applied to both crude oil and mixtures of various grades of oils that have undergone primary preparation at field gathering points. Example 1 Desalting of a viscous, highly paraffinic oil from the Sultangulovo-Zaglinskoye field, which had been dehydrated at an oil preparation unit and containing 1607 mg / l of chloride salt and water, was 0.8%. With an avliviot goth, an aqueous solution of the following composition, wt.%: Disolvan-44110.05 Liquid glass 0.064 Polyethylene polyamino polymethylene molonic acid 0.024 Water Up to 100. Heated solution of the composition is introduced into oil with the same temperature and the mixture is stirred in a mixer at 500 rpm within 15 minutes (V „e 90:10). After settling under isothermal conditions, an average sample is taken and the analysis for the content of chloride salts is performed using a laboratory analyzer of chloride salts (LAS-1). For comparison, I test, under the same conditions and on the same oil, the effectiveness of the prototype with the following aytx ratios of ingredients, weight. % Disolvay-44110,05 Liquid glass 0,064 Partially hydrolyzed polyacrylamide (8% of the active substance) 0,024 Water Up to 100. The oil obtained after treatment with a pendable composition contains 2 times less amount of chloride salts than in the case of treating oil with a prototype composition ( 20 and 40 mg / l). The content of chloride salts in nefy, which has been dehydrated by the proposed composition, decreases in comparison with the result. 80.35 times. Example 2. Desalting is subjected to high-viscous, high-paraffinic oil, desalted at the preparation point and containing 1,607 mg / l of chloride salts, an aqueous solution of the next remaining is added, wt.%: Separol-250,05 Liquid glass 0,064 Polyethylene polyamine polymethylene molonic acid O Water up to 100. For comparison, under the same conditions and on the same oil, the effectiveness of the composition of the prototype is tested with the following ratios of ingredients, weight. %: Separol-250,05 Liquid glass 0,064. Partially hydrolyzed polyacrylamide (8% of the active substance) 0.024 Water Up to 100. Oil treatment is carried out according to the method of example 1. Oil obtained after treatment, the proposed composition of example 2,. contains chloride salts 70.mg / l - 44.6 times less compared to the original sample and 1.9 times less than after treatment in a known manner 2.. Examples at extreme values of concentrations (wt.%) Of components of the known 2 and the proposed composition with indication of the obtained results are shown in Tables 1 and 2. Table 1

72766 6 6

Continuation of table 1

0.008 0.003

126 60 0.128 0.048

Claims (1)

Claim Composition for dehydration and desalting petroleum based surfactant demulsifier, water glass and water, characterized i in that, in order to improve the properties of demineralization, further comprising a polyethylene polyamine poly di carboxylic acid of formula _[2 -ene -sy -n- _{g] n} . 40 ·, noob - bn - boon .. where η = 5-12, in the following ratio of components, wt.%: 45 Surface active demulsifier 0.03-0.1 Liquid glass 0.008-0.128. Polyethylene aminopolydicar- fifty boonic acid 0.003-0.048 Water Up to 100.