SU1738813A1 - Compound for preventing evaporation of crude oil - Google Patents

Abstract

The invention relates to the oil industry and can be used to protect the oil from evaporation during its storage in northern conditions. The invention makes it possible to increase the effectiveness of the composition in northern oil storage conditions due to the use of a latex composition based on the joint polymerization product of butadiene, styrene, acrylic acid nitrile and methacrylic acid, carboxymethylcellulose, sodium, and water-insoluble organic acids, additionally naphthenic acids with the following ratio of components, wt.%: carboxymethylcellulose 0,, 7; sodium soaps of water-insoluble organic acids 16-20; naphthenic acids 1-2,5; the latex based on the product of the joint polymerization of butadiene, styrene, acrylic acid nitrile and methacrylic acid is the rest. 3 tab.

Description

The invention relates to the oil industry and can be used to protect the oil from evaporation during its storage in northern conditions.

The aim of the invention is to increase the effectiveness of the composition under northern conditions of oil storage,

Example. 0, CMC is dissolved in 1b-10 3kg of myolaphs, then 1-10 kg-, naphthenic acids and 82, HCHAH latex are added. The mixture is subjected to intensive () mixing for 900-1200 seconds. The resulting foam mass

0.1 kg of oil is deposited on the surface, which is in a beaker with a diameter of 0.05 m. The height of the foam layer. The glass together with the contents is placed in a thermostat and heated for 1-2 days at K until complete formation of a solid coating on the surface of the oil. Then-v the glass together with the contents is transferred to a refrigerator and kept at 233,238 K for 2 days, after the cup is again transferred to the thermostat (t = 338 K) and the effect of maintaining the positive buoyancy of the coating is observed, while the bulk weight of the coating is 350: U kg

CO 00 00

with

3173

The research results of the proposed and known compositions are given in t a bl. 1 o

Synthetic latex BSNA is a product of joint polymerization in an aqueous emulsion of butadiene, styrene, acrylic acid nitrile and methacrylic acid in the presence of an anion-active emulsifier. Latex BSNK is intended for use as a binder of pigment materials, in adhesives and in other compositions for construction equipment, in the manufacture of adhesive tapes on paper base, in the manufacture of nonwoven materials and in other areas.

Latex BSNK should comply with the standards specified in the table. 2

Milonaphil and naphthenic acids are obtained by purifying light and oil distillates and are a mixture of sodium naphthenic acid salts (HCHC). The data of table. 2 indicate the optimality of the proposed composition in comparison with the known in the proposed range of parameters

i Examples with a high content of naphthenic acids (above 2.5 wt.%) are not optimal due to the fact that the excess amount of naphthenic acids contained in the composition is released as a separate phase during the manufacture of the composition and passes into the oil phase. when applied to the surface of stored oil.

five

one

five

0

five

34

In tab. 3 shows the data on the reduction of hydrocarbon evaporation for oils from various fields.

As can be seen from the table. 3, the positive buoyancy of the coating, which was previously cooled to a temperature of (-1.5) - (- - U) ° C, is maintained regardless of the nature of the oil.

invention formula

A composition to protect the oil from evaporation, containing latex based on the product of the joint polymerization of butadiene, styrene, acrylic acid nitrile and methacrylic acid, carboxymethyl cellulose, sodium soaps of water-insoluble organic acids, characterized in that northern conditions of oil storage, it additionally contains naphthenic acids in the following ratio, wt.%: Carooxymethylcellulose 0,, 7 Sodium soaps insoluble in water organic acids 16-20 Naphthenic acids 1-2.5 Natka based on the joint polymerization product of butadiene, styrene, acrylic acid nitrile and methacrylic acid

Table 1

Known composition, May.4: myloneft 16.0; CMC 0.3; BCG the rest. + - Buoyancy maintained; - - not saved.

Mass fraction of dry matter,%, not less than 38 Surface tension, mN / m, not more than k2 Polymer hardness (rubber from latex), H 20-50 Mass fraction of non-polymerized monomers,%, not more than:

Styrene0,1

Nitrile Acrylic

acid0.05

Mass fraction of volatile hydrocarbons Su-S.,%, Not more than 0.02

Mass fraction of antioxidant agidol-2,% 0,

pH, not less than 8,, 5

Table 3

Claims (1)

Claim Composition for protecting oil from evaporation containing latex based on the product of the joint polymerization of butadiene, styrene, acrylate nitrile and methacrylic acid, carboxymethyl cellulose, sodium water-insoluble organic soaps 20 acids, characterized in that, in order to increase the effectiveness of the composition under the northern conditions of oil storage, it additionally contains naphthenic acids with the following ratio of components, wt.%: Carboxymethyl cellulose 0.3 ~ 0.7 Sodium soap. 30 water-soluble of organic acids 16-20 1-2,5 Rest Table! When measures The composition of the coating, mas The effect of reducing oil evaporation when using a coating that is pre-cooled ^ to a temperature, C Reduction ** of positive buoyancy of the coating, which are pre-cooled to a temperature, ° C Mylonaft kmts Naphthenic acids Latex BSK 10 0 (-5)- -(-10) (-23) - (- 25) (-35) - - (- 40) 10 0 (-5) 4 n'H (-20) - 1 (-25) · [ (-35) - (- 40) 1 16 0.3 1 82.7 76.9 77.5 77,2 78.1 78.5 + + + + 2 18 0.5 2 79.5 77.6 77.4 76.3 76.9 76.3 + + + + + 3 20 0.7 2,5 76.8 78.4. 77.7 76.3 78,2 75.9 + + + + + 4 18 0.5 0.5 81 77.1 76.9 78,2 77.5 0 + + + + + Of- • BfeCT- 57.1 57.4 56.7 0 0 + + + - - * | 5 Ί8 0.5 0 79.5 77.3 78.3 76.8 ? 0 0 4- + 4- - 1 ' ⁴ 6 18 0.5 3 78.5- 77.8 76.9 78.1 76.5 77.3 4-, + + + + * Known composition, ma.ί: Mylonaft ’6.0; CMC 0.3 "BS1ZH the rest. ** + - Buoyancy is maintained; -not saved. Table 2) Indicators | Norms Mass fraction of dry substances,%, not less 38 Surface tension mN / m, not more than 42 The rigidity of the polymer ( Uchuk from latex), N 20-50 Mass fraction of non-field merized monomers, %, no more: Styrene 0.1 Acrylic Nitrile acid 0.05 Mass fraction easily of hydrocarbons C _? -C ^, %, no more 0.02 Mass fraction of antioxidants Danta Agidol-2,% 0.7-1.5 pH, not less 8.5-9.5. Table 3 Oil - ------ Field oil at 20 ° C Reduction of oil evaporation using the proposed coating,% 1 . Bibi Aybat 29th 79 2 Yugansk thirty 76 3 Oil stones' 'zo 77 4 G yurgan 33 83 5. Duvan Sea 68 85 | 6 Mud hill 114 85 . Compiled by R._Vakar ''