SU810756A1 - 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 oil treatment plants and in oil refineries in the process of deep dewatering and oil desalting.

Formulations for the dehydration and desalting of petroleum are known, including an aqueous solution of polyacrylamide (PAA) or a mixture containing a surfactant, sodium silicate, partially hydrolyzed polyacrylamide, and water G11. However, these formulations do not have a sufficiently high efficiency, and the preparation of an aqueous solution of PAA of the desired concentration is not a technological procedure in field conditions, especially in winter. To prepare an aqueous solution of PAA, a high-speed mixer with cutting knives is required.

The composition C2 for the dehydration and desalting of petroleum is known, which contains the following ingredients, wt%:

Oxide block copolymer

ethylene oxide propiO, 03-O, 10 Lena 0.008-0.128

Liquid glass .

Polyethylenepolyamino polycarbonate

O, OOZ-0,048

acid

Water Up to 10O

However, the composition indicated is insufficient efficiency, and the manufacture of polyethylene polyamino polycarboxylic acid of the general formula:

- (lHa- (iHi-lf- 7t

CH, H00 (i - YH- (iOOH

/

where GU a: 5-12, requires an expensive and scarce product of malonic acid.

The aim of the invention is to increase the cemulsifying activity of the composition

This goal is achieved by the fact that the composition for dewatering and defrosting oil on a military basis, the social block of ethylene oxide and propylene oxide block copolymer, liquid glass and polyethylene-polyamine derivative according to the invention, contains polyethylene polymethylenemelenene-methyleneene-methylenene-methyleneene, -methylene-methylenelene-methyleneene, -methylene-methylmethylene-methyleneleno-methyleneene, polymethylene polymethylene polyethylene oxide, propylene polyamide, propylene polyamide; H2-CH2- "g where n 5 - 12 in the following ratio of components Block copolymer of ethylene oxide and propylene oxide 0, Q3-O, O7 Liquid glass O, OO6-0, O9b Polyethylenepolyamino-N-methylene sulfoxide of formula (X) C, OO5-O, O8 Water Up to 1OO As the block copolymer of ethylene oxide and propylene oxide, reagents such as disulvan-4411 and seprolol 25 are used. Metasily cat, and sodium trisilicate can be used as water glass. the module is in the range from 1 to 3. During the desalting process, the aqueous solution is mixed with the oil. It can be carried out by dosing the proposed composition in the oil pipeline, in the settling tanks with a mixer or by passing oil through the composition of the above composition in ezervuarah. Desalting the proposed composition can be subjected to both crude oil and mixtures of different grades of oils that have undergone primary oil preparation at field gathering points. Example 1. A desiccation is expected of a viscous, high trench, refined crude oil from the Sultangulovskoye-Zaglinskoye field, which has been dehydrated using an oil preparation unit containing 916 mg / l of chloride salts and water 0.21. An aqueous solution of the following composition is prepared, wt%: Disolvan -4411О, О5 Liquid glass. O, O48 Polyethylenepolyamy-HO-N-methylene sulfonic acid of the formula () 0.04 O Water Up to iOO In the solution solution heated to the composition, oil with the same temperature is injected and the mixture is stirred in a mixer at 500 rpm for 15 minutes (Un VK. - 8O :ten). After settling under isothermal conditions, an average sample is taken and the chloride salt content (LAS-1) is analyzed. For comparison, the effectiveness of a known composition is tested under the same conditions and on the same oil with the following ratios of components, wt.%: Disolvan-44110.05 Liquid glass0.064 Polyethyl enpolyamine 0polydicarboxylic acid 0.024 Water Up to 10O Residual chloride salts in the suggested composition 10 mg / l, in the well-known - 27 mg / l. From the above data it can be seen that the oil obtained after the treatment with the proposed Composition contains a much smaller amount of salts than in the case of processing the oil with the composition of the prototype. Co. the retention of chloride salts in the oil is 92 times lower than the initial sample, which, in addition, has been dehydrated by the proposed composition. EXAMPLE 2 Desalting is subjected to high-viscosity highly paraffinic oil, which is to be dehydrated at the oil treatment station and containing 916 mg / l of chloride salts and water 0.21%. An aqueous solution of the following composition is prepared, wt.%: Separol-250,05 Liquid glass, 0, O48 Polyethylenepolyamino-N -methylene sulfonic acid, 04 O Water Up to 100 For comparison, they are tested with the same ones. conditions and on the same oil the effectiveness of the known composition in the following ratios of components, wt.%: Separol-250,05 Liquid glass 0, O64 Polyethylene poly-polyamino polyidicarboxylic acid 0, 024 Water Up to 100 Oil treatment is carried out according to the method of example 1.

The residual content of chloride salts in the composition of 23 mg / l, c. known - 52 mg / l.

It is obvious from the brought zangs that the oil obtained after treatment with the proposed composition of example 2 contains 4O less chloride salts compared to the HdxooHofl sample.

Examples with extreme concentrations of the components of the composition with an indication of the results are summarized in Table. one.

Table

0.03

O.Ob 0.096 0, O7 0.006 0.09 6

In addition to Toio, laboratory experiments were performed to evaluate the dehydration effect of oil using known and proposed formulations.

All studies were carried out on an artificial emulsion that was prepared on anhydrous oil and formation water from a single field. To prepare the emulsion, a mixture of anhydrous oil and produced water is taken (the emulsion is prepared with 2O% - as the most stable), the mixture is poured into a 80O ml beaker-mixer. Dispersing was carried out

at a constant number of revolutions of a mixer like a tissue shredder at 400 O rpm for 3 minutes. All samples were dispersed under the same conditions in order to obtain an emulsion

had the same degree of dispersion.

Izvostny

After that, the emulsion was subjected to the study.

In the prepared emulsion poured into Lysenko’s septic tanks, the components of the composition were added at the top, bottom and optimum ratios. Then the samples were thoroughly mixed on an automatic stirrer of type LE -2ОЗ for 1O minutes. Next, the samples were placed in a sludge in a water bath at a temperature of + 5 ° C for 2 hours. Every 15, 30, 6O, 120 minutes, the amount of separated water in the source of emulsin was determined in percent, the residual water content according to the Dean method and Stark

The data are given in table. 2 and 3.

cm

and tr н t; .10 a N

Oso

t

Ooh

oo

co o o o

00

 about

ABOUT

with Oh

yoo o

 WITH

with

Si

oh oh

oh oh

h- o

about

h o

yoo o

with

about

PM

about

Ltd . about 1181 From the data given in table. and 3 it follows that the use of a clear & gamrgo sosgava. for oil dehydration improves the effect of oil dehydration. i,. The proposed composition recommends using it at the stages of deep dehydration and desalination of oil where most of the water is discharged at the previous stages of the oil treatment installation. Oil entering the stage. bleaching, contains in his. the composition of water is up to 1.5% and chloride salts up to 10,000 mg / l, which indicates that the chlorides in the oil in the majority of the oil are in the form of small crystalline dispersions in the entire volume of the oil In the table below. 4 shows data on the desalting of oil with a composition using polyethylene polyamino-M-methylene-sulphonic acid of the formula- (I)

F o rmu l invention

A water-based oil dewatering and desalination composition containing block copolymer of ethylene oxide and propylene oxide, water glass and polyethylenephenolamine derivative, characterized in that, with a decrease in demulsifying composition, as polyethylenpolyamine derivative

it contains a polyethylene polyamino-N-methylene sulfonic acid of formula (1)

CH, v, CHi - (iH 9 - CH2 - 8 -1 with "1-5 (A). 5-6 (B) 7-8 (C) 9-10 (D) 11-12 (D) Of The data given in Table 4 implies that the use of polyelectrolyte from Clauses 1-5 and more than 12 is not economically feasible .. -Using the proposed dewatering and oil desiccation composition provides; Compared with the existing composition, the following advantages: conduct deep bleaching operations with higher quality; a more affordable and more expensive polyethylenepolyamine polyamine N1 is used in the proposed composition .- methylene sulphonic acid; residual content of soy chloride in oil using the proposed composition is reduced compared with the composition of the prototype Table 4

where n 5-12,

at the following ratio

weight.%:

Blockoxomer of ethylene oxide and propylene oxide

Liquid glass

Polydylene-polyamino-N-megylene sulfonic acid of formula (I)

Water

Sources of information taken into account in the examination

1. The state and prospects for the development of technology and technology for the collection, preparation of oil, gas and water in the industry. M ,, VNIIOENG, 1975, p. 52-54, 65-69.

2. USSR author's certificate in application N 2547771/04 cl. С 1О Q 33 / О4 25.11.77 (prototype).

Claims (1)

Claim Composition for dehydration and desalting of water-based oil containing a block copolymer of ethylene oxide and propylene oxide, water glass and a derivative of polyethylene polyamine, characterized in that, in order to increase the demulsifying activity of the composition, it contains a polyethylene polyamino N -me · thylene sulfonate formula of the formula (I) SNi Bk "where η * 5-12, in the following ratio of components, wt.%: Bl oxopolymer of ethylene oxide and propylene oxide Liquid glass Polyethylene polyamino — but — N — methylene sulfonic acid of the formula (I) Water 0.03-0.07 0.006-0.096 0.005-0.080 ^{, 0} Up to 100