Structure and properties of naphthenic acids

Cas Number: 1334-28-5
HS Code: 382499
EС Number: 215-662-8

Naphthenic acids refer to acid-containing compounds, and are expressed by the general formula CnH2n-2О2, where n = 5 ÷ 22. They are a complex natural mixture of organic acids of the ultimate nature.

Naphthenic acids are represented in oils by the acids of almost all classes of alkane, aromatic, and naphthenic hydrocarbons with a straight and branched structure. Petroleum acids, extracted from naphthenic base oils, extracted in Baku, in their composition and physicochemical properties fully correspond to naphthenic synthetic acids. Therefore, they are usually called not oil, but natural naphthenic acids.

The richest source of naphthenic acids are the Baku grades of oil produced in the Binagadi, Bibi-Heybat, Romani, Sabunchu, Balakhani and other fields.

According to their chemical properties, naphthenic acids are typical carboxylic acids. When neutralized, they easily form a variety of salts, of which are alkaline, well soluble in water. This property is based industrial method for producing naphthenic acids. In order to obtain environmentally friendly, light, purified from neutral oils and peculiar smell of naphthenic acids, with high (99.0% -99.5%) content of the main substance, crude naphthenic acids after special purification are subjected to distillation with the selection of specified fractions.

During distillation, it is possible to obtain distilled naphthenic acids that meet the requirements of their own technical specifications, the requirements of GOST 13302-77, and also in accordance with the requirements of the main consumer. It should be noted that in addition to distilled naphthenic acids, our group of companies produces technical naphthenic acids, as well as products such as acidol, oil-free and oil-free, acidol-naphthenate soap, naphthenate soap.

The group of companies “Karvan-L” has been producing natural naphthenic acids for more than 20 years and selling them on the world market. Naphthenic acids produced by the company have found their customers in many countries of the world.

The demand for this product is constantly increasing. At present, the annual global market demand for naphthenic acids is more than 50,000 tons, and this figure is growing from year to year.

In general, naphthenic acids and their derivatives have found widespread consumption in more than 40 industries.

In the form of salts of lead, manganese, cobalt, zinc, iron, aluminum, chromium, as well as in the form of other derivatives, naphthenic acids are used for the manufacture of dryers, varnishes and paints. In the chemical industry, naphthenic acids are also used as a component for the production of synthetic products for various purposes, mainly such as polyesters.

Some salts of naphthenic acids are used as homogeneous catalysts in oxidation reactions with metals of variable valence.

Naphthenic acids are used as solvents for rubbers in order to obtain rubber compounds as an intermediate for further use. Naphthenic acids are used to produce special types of soap. Free naphthenic acids are added to printing inks and help improve flowability. Also naphthenic acids are used as a solvent for aniline dyes and as a sleeper impregnant, protecting the tree from rotting.

Lead, chromic, cobalt and manganese salts of naphthenic acids are used as antistatic, anti-detentive and antifoam additives to fuels, including jet, and oils.

Aluminum salts contained in naphthenic acids are used in the military industry for the production of napalm.

Naphthenic acids, both free and in the form of various derivatives, possess effective fungicidal, insecticidal, bactericidal and anti-decay properties, on which their practical use in the fight against weeds and plant pests is based. Also naphthenic acids are used for impregnation of wood, fabrics of sails, burlap, ropes, tarpaulin, fishing gear, subjected to frequent exposure to moisture, which attracts bacteria and pests.

On the basis of naphthenic acids, lubricating and emulsifying materials are made for cooling cutting machines, dye paste, grease for pressurized machines, demulsifiers that destroy oil and oil emulsions.
In electronics, naphthenic acids are used to produce magnetic fluids.