SU1460067A1 - Compound for removing asphalt-resinous deposits from petroleum industrial equipment - Google Patents

Abstract

The invention relates to the oil industry and can be applied in the treatment of wells, the side zone, underground and above-ground oil-field equipment for removing asphalt-resin-paraffin deposits. The goal is to increase the effectiveness of the composition by increasing its dissolving ability. The composition is produced by mixing the butyl head. alcohols and bottoms production of butyl alcohols in the following ratio of components, wt.%: the head of the secondary butyl alcohol 70-98, bottoms production of butyl alcohols 2-30. The head of the secondary butyl alcohol is a by-product of the production of methyl ethyl ketone, a colorless or light yellow liquid with a boiling point of 35-40 ° C and a density of 785-830 kg / m. Distillation residues - waste during the rectification of butyl alcohols obtained by the method of oxosynthesis, oily liquid with a boiling point of 130-300 C. Table 2.

Description

one

The invention relates to the oil industry and can be applied in the treatment of wells, near-well zone, underground and surface oil-field equipment for the removal of asphalt-resin deposits.

The purpose of the invention is to increase the effectiveness of the composition by increasing its dissolving ability.

The composition is produced by mixing the head of the secondary butyl alcohol and bottoms of the production of butyl alcohols in the following ratio of components, wt.%:

The head of the secondary butyl alcohol

Distillation production of butyl alcohol

70-98

2-30

ijiib

OE

Od h

The head of the secondary butyl alcohol is a by-product of the production of methyl ethyl ketone, a colorless, transparent or light yellow liquid containing 2-butanol up to 40% by weight. The main components of the head wt.%:

Esters 5-12

Aldehydes 20-40

Acetone10-21

Methyl ethyl ketone 4-19 Isopropyl

Alcohol 2-Butanol Trimethylcarbinol Water

3-8 8-40

1-8 Else

The initial boiling point is 35-40 ° C, the end of the boiling point is 100-110 ° C, the density is 785-830 kg / m,. pH 8-9.

The bottoms formed during the distillation of butyl alcohols obtained by the method of oxosynthesis are a yellow oily liquid. The composition of bottoms includes

n-Vutanol

Isobutyl butyrate

Isobutyl isobutyrate

Butyl butyrate

2-Ethylhexanol

n-octanol

Acetal of isobutyric aldehyde and

isobutanol

Acetal of isobutyric aldehyde and

n-butanol

components, wt.%: 3-14 3-15 2-12 3-13 5-24 5-28

5-30

5-41

Acetal of isobutyric aldehyde and n-butanol5-39 Ester of isobutyric acid and 2-ethylhexanol 8-44 Ester of n-butyric acid and 2-ethylhexanol10-50 Unidentified impurities 5-20 Isobutanol Else

Boiling point 130-300 ° C, acid number 2-5 mg KOH / g, ester number 90-115 mg KOH, hydroxyl number mg KOH / g 220-240.

The effectiveness of the compositions is evaluated by the duration of the dissolution of samples of sediments of different composition.

.1 g of asphalt-resin-paraffin deposits (ARPD) are heated by an even layer onto a steel rod 1 cm in diameter and 5 cm long. After cooling to room temperature, the sample is lowered into a cylinder with 50 ml of the tested composition and op 1460067

determine the time of complete dissolution of the sample without stirring.

The test results are shown in table 1 and 2.

From Table 1 it can be seen that this composition exhibits great activity in dissolving samples containing asphaltenes and resins (samples 1-4,

1Q 10-14). With an increase in the content of asphalts and resins up to 100%, the duration of the dissolution of samples decreases 1.5 times. With an increase in the paraffin content in the samples, the solvent activity decreases, the duration of dissolution increases from 7 to 19 minutes (samples 5–9).

The known composition l dissolves paraffins more actively than

2Q with asphalt-resinous components, known compound 2 is also active against paraffins, but the duration of dissolution remains relatively long.

25 According to the results of Table 2, it can be seen that the proposed composition, within the concentration of the butanol-2 head, is 70–98 wt.% And the bottom residue, 2–30 wt.%, Surpasses individual components and known compounds in dissolving capacity. The minimum duration of dissolution is obtained with a head concentration of 70-98% by weight and a bottom residue of 2-30% by weight. Increase in bottom residue

35

(more than 40 wt.%) leads to a decrease

the rate of dissolution of samples paraffin.

I

Claims (1)

Invention Formula 40 The composition for removing asphalt deposits of oilfield equipment containing bottom residues from the production of butyl alcohols and an additive that differs so that, in order to increase its efficiency by increasing the dissolving capacity, it contains as an additive a secondary butyl alcohol head. 50 product of methyl methanol production in the following ratio of components, wt.%: Head of secondary butyl alcohol 70-98 Vat residues of the production of butyl alcohols 2-30 55 30 walks individual components and known compounds. The minimum duration of dissolution is obtained with a head concentration of 70-98% by weight and a bottom residue of 2-30% by weight. Increase in bottom residue 35 (more than 40 wt.%) leads to a decrease the rate of dissolution of samples of paraffin. I Invention Formula A composition for removing asphalt-rich deposits of oilfield equipment, containing bottom residues from the production of butyl alcohols and an additive, which, in order to increase its efficiency by increasing its dissolving power, contains the head of secondary butyl alcohol as an additive production methyletherstock in the following ratio, wt.%: Head of secondary butyl alcohol 70-98 Vat residues of the production of butyl alcohols 2-30 T "b l n c 1 Head of butanol-2 90 wt.%, VAT residue on May 10 .. Head of butyl alcohol 55 May., Kerosene fraction 45 nac.Z. Toluene is 67 May.2, cubic MW is 33 May.2. Toluene VAT residue VAT residue Butanol-2 Head Head of butanol-2 VAT residue Head of butanol-2 VAT residue Table 2 9.0 7.0 11.6 8.7