SU1726497A1 - Depressor-inhibitor additive for paraffin petroleum and petroleum products - Google Patents

Abstract

The invention relates to petroleum additives, in particular a depressant inhibitor additive for paraffinic oils and petroleum products. The goal is to reduce the cost and decrease the freezing temperature of the additive. To do this, use a composition that includes mac.ch .: synthetic fatty acids of the Sgo-Szo fraction or their bottoms 6.3–9.1; distillation residues from the production of ethylene diamine and hexamethylenediamine 0.8-3.6; tall oil 0.1-1.5. This composition increases the depression of the freezing temperature by 1.5-2.4 times and reduces paraffin deposition by 5–18% while reducing the cost due to the use of production wastes. 2 tab.

Description

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The invention relates to petrochemistry, specifically to compositions of a depressant-inhibitor additive that can be used to lower the freezing point of oil and to reduce the crystallization of paraffins in petroleum and petroleum products. The well-known depressant additive to high paraffin oils, which is a copolymer mixture homologues of alkyl vinyl ethers of monocarboxylic acids of St-Szo and alkyl vinyl ethers of carboxylic acids of St-Szo with a mass ratio of 1.8: (1-7.5): 1. With the introduction of 0.1-0.2 wt.% Additive in oil, its freezing temperature decreases by 10-20 ° C.

The disadvantages of the additive are a slight decrease in the freezing point of oil, the complexity of the synthesis.

scarcity and high cost of initial reagents.

Closest to the proposed composition and purpose is depressant inhibitory additive mol.m. 300-10000 based on an amine or polyamine with a saturated aliphatic radical (mainly Cie-Cas) of carbon atoms and maleic or alkenylsuccinic anhydrides and their derivatives, taken in a mass ratio of (1-4): 1. With the introduction of this additive in the amount of 0.15-0.2% in gas oil, the cloud point of the latter decreases by 2.3-3.3 ° C. in some cases at 9-12 ° C; the inhibitory effect against paraffin deposition is 70% with an additive concentration of 0.1%.

The disadvantages of the additive are a slight decrease in the freezing temperature of the gas oil and paraffin deposition.

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limited use - only for petroleum products, the scarcity and high cost of initial reagents.

The purpose of the invention is to improve the low-temperature properties of additives for paraffinic oils and petroleum products and to reduce their cost by changing the type of raw material — using available bottom residues.

The goal is achieved by an additive containing high-molecular-weight synthetic fatty acids of Сgо-Сзо fraction (FFA) or their bottoms as carboxylic acids, and bottoms from ethylene diamine or hexamethylene diamine production as alkylene polyamines and additionally tall oil at a ratio of components, wt. including:

Synthetic fatty

acids

Sao-Szo faction

or their vat

residues 6.3-9.1

Vat residues from

production

ethylenediamine and hexamethylenediamine 0, 8-3,6

Tall oil 0.1-1.5

Acid fractions of C21-C25, (acid number 175 ± 5 mgKOH / g) OST 38 01182-80 and vat residue from production of FLC (acid number (60-80) ± 10 mg KOH / g) are used as high-molecular FLCs. on THE 38USSR10754-74.

Alkylene polyamines - vat residues from the production of ethylene diamine or hexamethylenediamine grades A, B, C, D, which are viscous brown liquids soluble in water, aromatic hydrocarbons, acids, etc. They are produced according to TU 602-914-81, TU 602- 594-80.

Tall tall oil is a brown viscous oily liquid with an acid number of at least 70 mg KOH / r, produced in accordance with TU 81-05-100-76.

The proposed additives differ from the prototype using other raw materials — high molecular weight (C21-C25; SasgSzo) fractions or bottoms. FFA residues, tall oil and bottoms from the production of ethylenediamine or hexamethylenediamine.

A depressive inhibitor additive is obtained by mixing calculated amounts of FFA or their bottoms with bottoms from ethylene diamine or hexamethylenediamine production and tall oil at 100-140 ° C for 8-16 hours. The additive is a waxy substance with a m.p. 50-70 ° C. soluble in isopropyl alcohol, aromatic or aliphatic hydrocarbon solvents, or mixtures thereof. The additive is used in the form of a 30% solution in a hydrocarbon solvent. The additive solution has a pour point of - 30 ° C, which is important when it is transported and used in northern

0 areas of the country.

Example 1. 76 g of the cubic residue of synthetic fatty acids, 10 g of tall oil are added to the beaker and poured with gradual stirring during

5 0.5 h 14 g VAT residue from the production of ethylene diamine. The resulting reaction mixture with a mass ratio of 7.6: 1.4: 1.0 is heated to 140 ° C and held for 8 hours (until complete removal of water). Output

0 100 g of the additive, its composition is presented in table. 1. Melting point 50-53 ° C. The pour point of the additive in the form of a 30% solution in kerosene, determined according to GOST 20287-74 (method B) is

5 -30 ° C. The essence of the method consists in heating the sample of the additive in a test tube to 50 ± 1 ° C, followed by cooling to a predetermined temperature and determining the yield strength by changing the meniscus of the liquid at an angle

0 45 °. The same method is used to determine Tzast. oil and petroleum products.

In the sample of oil Novourengoyskogo cTzast. 14 ° C, heated to 50 ° C, 0.2% of the additive is introduced, and stirred in 155 minutes at this temperature for 30 minutes. Then the sample is cooled to 30 ° C and Tzast is determined according to GOST 20287-74. oil with an additive. It is -14 ° C. Depression of the freezing temperature, found as the difference Tzast. oil with an additive and the oil itself is 28 ° C. The experiments were also conducted with different concentrations of the additive in oil from 0.05–1% (Dolinska oil with Tzast. 20 ° C). Degree of inhibition

paraffin deposition is 88%. The essence of the technique consists in filling two containers of 100 ml each with samples containing oil with an additive taken in an amount of 0.1% and without it, plugging and thermostating at -10 ° C for a week and then determining the difference of crystallized paraffin into the container x and the calculation of the protective effect in percentage terms (for the experiments, the Uren5 goisk oil mol.m., 157 amu, Tzast. 14 ° C and the paraffin content of 8% was used). The pour point of oil and oil products and the degree of inhibition of paraffin deposits are given in Table. 2

PRI mme R 2. It is carried out analogously to Example 1, the number and composition of the components used are changed. The data are given in table. 12,

Thus, as follows from the table. 2 depressant inhibitor additive, compared with the prototype allows:

increase the depression of the oil freezing point by 1.5-2.4 times with an insignificant concentration of 0.05-1%;

increase the degree of inhibition of paraffin deposition up to 88%;

reduce its cost by using cheap and affordable waste;

to expand its functionality - suitable for both oil and petroleum products.

Claims (1)

Invention Formula Depressant inhibitory additive for paraffinic oils and oil products blitz a 1 Component composition of additives containing FFA, tall oil, alkylene polyamines Фр "Са, - С jo-fraction of SLC with the number of carbon atoms 20-30 based on carboxylic acids with the addition of alkylpolyesins, characterized in that. In order to improve the low-temperature properties of the additive and make it cheaper, the additive contains synthetic fatty acids fractions or bottoms as carbone acids, and bottoms from ethylene diamine and hexamethylene diamine production as alkylene polyamines and additionally contains tall oil in the following ratio of components, May .ch .: Synthetic fatty acid fraction  or their bottoms6,3-9,1 Bottoms from production ethylenediamine and hexamethylenediamine 0.8-3.6 Tall oil.0.1-1,5 Table 2 The pour point of oil and oil products, their depression and the degree of inhibition of paraffin deposits in the presence of additives , dcie, 36 28 21 12 27 and 10 I The degree of inhibition from paraffin deposition,% (at an additive concentration of 0.1 May.) 88 Ј Oil. Gas oil , eight 28 20 16 6 20 and 9 C 19 12 8 37 22 17 7 2 21 16 8 12 8. (0.15%) 8A 79 86 86 85 70