SU775120A1 - Composition for oil dehydration and desalinization - Google Patents

Description

one

The invention relates to the field of oil preparation and can be used both in field installations for oil treatment and in oil refineries in the process of deep dehydration and desalting of oil.

Compounds are known for dehydrating and desalting JEF, including an aqueous solution of polyacrylamide (PAA) or compositions containing a surfactant, sodium silicate, partially hydrolyzed polyacrylamide and water; {l. °

However, the indicated compositions are 11 sufficiently effective, and the preparation of an aqueous solution of PAA of the necessary amount of 20–10 centration is not a technological operation in field conditions, especially in winter. For the preparation of an aqueous solution of PAA, a high-speed mixer with cutting knives-25 mi is required.

A known composition for the dehydration and desalting of petroleum, containing ethylene oxide and ethylene oxide 30

propylene, polyethylene polys1Min (PEPA) rvchea formula

HjW- CHj-CHj-TI CHj-WHj

Otj-ch -lfHz

where n is 5-12,

in the following ratio, wt.%:

Block copolymer of ethylene oxide and propylene oxide, 03-0.07 Polyethylene polyamine 0.04-0.10 Water Up to 100 When using this composition, a significant amount of chloride salts remains in the oil, which are mostly in oil in the form of small crystals girovanny in all volume of oil.,

The whole of the present invention is an evolved emulsifying activity.

The goal is achieved by the fact that the composition for dehydration and desalting according to the invention, including water and ethylene oxide and propylene oxide block copolymer, contains a polyethylene ethylene-N-methyl-8-oxyquinoline of the general formula I as a polyamine derivative (-sHg-CH-Kg „Where p 5-12, in the following ratio of components, wt.%: Bioxypolymer of ethylene oxide and propylene oxide0, 03-0.07 Polyethylenepolyamino-N-methylene-8-oxyquinoline of the general formula G, 0.04-0.10 Water„ Up to 100. As block copolymers of ethylene oxide and propylene oxide can be used reagents demulsifiers be both water soluble and oil soluble. The best effect is exerted by substances like disolvan-4411 and separaol-25. The desalting process involves mixing the aqueous solution with the oil. This process can be carried out by supplying the proposed composition to an oil pipeline in settling tanks with a stirrer or by passing oil through a composition of the indicated composition in tanks. Desalting the proposed composition can be subjected to crude oil at field gathering points, and refineries. Example 1. Desalting in a viscous, highly paraffinic oil from the Sultangulovskoye-Zaglinskoye field, which was dehydrated at an oil preparation unit and containing 2906 mg / l of chloride salt and water, 0.3%. An aqueous solution of the following composition is prepared, wt.%: Disolvan-4411 0.05 Polyethylene poly-M-methylene-8-hydroxyquinoline of the general formula T 0.06 Water Up to 100 V heated to + 60 ° C aqueous solution for dehydration and desalting vanilla oil with the same temperature is supplied oil and the mixture is stirred in a mixer at 600 rpm for 90:10). After about 15 minutes (V, then an average sample is taken under isothermal conditions and an analysis of the chloride salts is carried out using laboratory analysis of the boron salts of LAS-1. For comparison, the effectiveness of the known composition of the oil was determined on a parity basis. the following ratio of components: Disolvan-4411 0.05 Poly ethyl n poly amin n 0.06 WaterUnto 100 The data obtained are given in Table 1. From the presented data it can be seen that the oil obtained after treatment with the proposed composition contains a much smaller amount of salts, than in the case of processing The composition of the chloride salts in the oil is 329 times lower than the initial sample, which has also been dehydrated with the composition described. Example 2. Desalting is subjected to a highly viscous high paraffin oil that has dehydrated at the oil preparation point and contains 2906 mg / l chloride salts and water 0.3%. Prepare an aqueous solution of the following composition, wt.%: Separol-25 0.05 Compound D 0.06 Water Up to 100 For comparison, the effectiveness of a known composition is tested under the same conditions and on the same oil at. leduyuschih ratios of ingredients, wt.%: Separol polyethylenepolyamines-25 0.05 0 100 VodaDo treatment oil is carried out as in Example 1. The results are shown in Table. 2. From the above data it can be seen that the oil obtained after treatment with the proposed composition according to example 2, contains chloride salts 244 times less compared to the original sample. The examples at extreme values of the concentrations of the components of the composition with indication of the results are summarized in Table. 3 and 4. In table. 3 shows the data on the known composition, in table. 4 - data on the proposed composition. All studies were carried out on an artificial emulsion that was prepared on anhydrous oil and formation water from the same field. To prepare the emulsion, a mixture of anhydrous oil and produced water is taken (the emulsion is prepared 20% as the most stable), the mixture is poured into a 800 ml beaker-mixer. Dispersing is carried out at a constant number of revolutions of the tissue disintegrator type mixer, at 4000 rpm for 3 minutes. All samples were dispersed under the same conditions so that the resulting emulsion had the same degree of dispersion. Next, the emulsion was subjected to the study. In the prepared 20% emulsion, poured into the sumps

Lysenko, the components of the composition were added at the top, bottom and optimum ratios. Then the samples were thoroughly mixed on an automatic mixer type LE-203 for 10 minutes. After that, the samples were placed in the sludge in a water bath for 2 hours. Every 15, 30, 60, 120 min the amount of water that was removed was measured in the septic tanks, and the percentage of residual water was determined by the Dean and Stark method in the initial emulsion.

The data obtained are given in table. 5 and 6. In all the experiments, oil from the Sultangulovsko-Zaglinskoe oil and gas field was used.

From the data given in table. 5 and 6, it follows that the effect of oil dehydration using the proposed composition is higher than using the known composition. Compositions for processing Petroleum components at optimum concentrations Known Disolvan-4411 Offered Disolvan-44-11 Composition for processing Components of oil at optimal composition concentrations Known Separol-25 Polyethylenepolyam Water Offered Separol-25 Compound I Non-ionic surfactants, Polyethylene weight.% Polysmin. wt.% Disol-Separolvan-4411 -25 0.03 -0.04 d

0.07

In tab. 7 shows data on oil dehydration using compound I with different degrees of polymerization.

From the data given in table. 7 it follows that the compound of formula 1, where 5 p 12 use economically impractical.

The use of the proposed composition for the dehydration and desalting of oil provides, compared to the existing ones, the following advantages:

allows in the technology of oil preparation to carry out operations of deep dehydration and desalting of oil

the residual content of chloride salts in the oil using this composition is reduced compared with the use of the known composition. Polyethylene poly Water Compound I

up to 100

0.10 Table 1 ava Residual content of chloride salts, mg / l min 13 9 Table2 Residual. Content of chloride salts, mg / l e 17 12 Table 3 Water, Residual wt.% Content of chloride salts, | mg / l 100 62

Continued table. 3

Ta.b faces 4

Table 5.

Table b

Continued table. b

Table 7

Claims (1)

The claims ⁴ Composition For dehydration and desalting of water-based oil, containing a block copolymer of ethylene oxide and propylene oxide and a polyamine derivative, characterized in that, in order to increase the demulsifying activity of the composition, it contains polyethylene polyamine-I-methylene-8-hydroxyquinoline of the general formula "- · T (-CHj-CHj-'N-Jn OH where η 5-12 ,. in the following ratio of components, wt.%. Block copolymer of ethylene oxide and propylene oxide 0.03-0.07 Polyethylenepolyamino-K-methylene-8-hydroxyquinodine of the general formula I Water 0.04-0.10 Up to 100