SU717125A1 - Demulsifying agent for dehydrating and desalinization of oil - Google Patents

Description

(54) DEEMULGER FOR WARMING AND WASHING

OIL

with a stirrer or oil through a composition of the above coctaea in tanks. Desalting with the proposed composition can be subjected to crude oil, at commercial gathering points, and at oil refineries.

Investigations were carried out in laboratory conditions on an artificial emulsion that was prepared on distilled oil and produced water from one field.

To prepare the emulsions, a mixture of anhydrous oil and produced water is prepared (a 20% emulsion is prepared as the most stable. The mixture is poured into a 800 ml beaker-mixer. The dispersion is carried out at a constant number of revolutions of 4,000 rpm tissue grinder 3 min; All samples are dispersed under the same conditions so that the resulting emulsion has the same degree of dispersion.

After that, the emulsion is subjected to the study.

In the prepared 20% emulsion, poured into Lysenko’s septic tanks, reagents are added, and emulsifiers in the form of a 1% aqueous solution in an amount of 0.02-0.10 wt.% From taken oil. Samples are thoroughly mixed on aBtOv mathematica LE-203 type agitator for. 10 min. Further samples are placed

sludge in the war bath fi temperature

 for 2 hours Every 15, 30, 60, 120 minutes, the amount of separated water in the settling basins is measured, and the percentage of residual water is determined by the Dean-Stark method in the initial emulsion. The data obtained are given in Table. 1-5, where the relative efficiency of the demulsifiers in the processing of the oil-and-oil emulsion from the Sultangulovsk-Zagledinsky oil and gas field NGDU Bug-Fuslanneft is indicated.

Table 1

T l and c and 2

Oepfst 25 and polyethylene; polilmin formula 1

Table 3

Table 4

Spreadsheets

a 5

None From the data of Tables 1–5, it follows that the effectiveness of non-ionic demulsifiers dissolving 4411 and separol 25 considerably exceeds the effectiveness of polyethylene polyamine, and the effectiveness of a mixture of non-ionic surfactant and polyethylene polymine practically does not change the ri side of the increase in dehydration effect. The proposed composition is recommended for use on the deep oil desalting stations, where most of the water is discharged on the previous stages of the installation during the preparation of oil. The oil delivered to the desalting stage ny contains a small amount of water up to 1.5%, and chloride salts up to 10,000 mg / l. This suggests that the chloride salts in the oil are predominantly in the form of small crystals dispersed throughout the volume of the oil. Deep desalination consists in that “fresh water is supplied to the pre-dewatered oil in a quantity of not more than 10% by weight of the oil, then the oil-water system is intensively dispersed. This operation is necessary to flush the chlorine salts 1 out of the oil and transfer them to aqueous phase. To speed up the separation process of the oil-water systems: a non-ionic demulsifier (e.g. dissolvane 4411 or separol 25) is additionally supplied to the oil being processed.

0.03 0.04 0.05 0.06 0.07

0.03 0.04 0.05 0.06

717125

109

101

96

63

49

118

117

117

89 Dp of more complete extraction of chloride oles from the oil into the aqueous phase together with eionogenic demulsifiers, polyethylene polyamine acting as flocculant, capable of more intensively and completely transferring crystalline chloride salts from the oil to the aqueous phase, is introduced into the 1 crescent water, thus enhancing the effect of deep oil desalting. Listed below are data confirming the effectiveness of the compositions of non-ionic surfactants and polyethylene polyamia in the processes of deep desalting of oil. An oil with the same temperature is injected into the aqueous solution of the composition heated to 60 ° C and the mixture is stirred in a petty bourgeois at 600 rpm for 15 minutes (Unneft composition 90: 10). After settling under isothermal conditions, an average sample is taken and the chloride salts are analyzed by means of a saline meter (LAS-1). Desalination is subjected to viscous, highly paraffinic oil. Sultangulovskoye-Zagledinsky field, generous dehydration at the oil treatment plant and containing 2848 mg / l of chloride salts and 0.28% of water. In tab. 6-8 show the results of oil treatment using compositions for deep dehydration and desalting of oil (water content is up to 100%). Table 6

0.07

717125

Yu

. Continuation of the table. 6

Yu:

58 119 114 103

94 84

T a b l and c a 7

Table 8

11. 71

In tab. 8 shows data on the effectiveness of the compositions at different degrees of polymerization of polyethylene polyamine. Vacuum distillation of the polyethylene polyamine fraction was divided into narrower subfractions with the following values of the degree of polymerization; A 5-6; B 7-8; C 9-10; D 11-12. . The use of the proposed composition for the dehydration and desalting of oil in comparison with the existing composition provides the following advantages:

a) allows for more efficient dehydration and desalting of oil;

b) the residual content of chloride salts in Yefti using the proposed composition is reduced compared with the use of the composition of the prototype, which will allow to deliver oil at a higher category:;

Claims (2)

1. The state and prospects for the development of technical equipment and technologies for the collection, preparation of oil, gas and water industry. M., VNIIOENG, 1975 p. 52-54, 65-69. 2. Petrov A.A. Demulsifying agent reagents for dehydration and dehydration of oil. 25 Kuybyshev, KKN, J966, p. 89 (prototype).