SU407870A1 - METHOD OF OBTAINING HIGHLY BREWING FLUORINE PAROFFINS - Google Patents

Description

one

The invention relates to methods for producing fluoroparafia.

Highly fluorinated paraffins are used as lubricating oils.

A known method for producing highly fluorinated paraffins by fluorinating paraffin in the presence of a CoP3 catalyst. The reaction products are first condensed, then neutralized, filtered from cobalt fluorides and washed.

High-boiling fluorine paraffins are removed from the mixture by filtration at 18-25 ° C.

The disadvantage of this method is the ash removal of low-grade fluoroparaffins at filtration at 18–25 ° C, as a result of which the target product has insufficiently good indices that do not allow it to be used for the preparation of consistent o-carbon lubricants. Thus, the main indicator for lubricants, the temperature of the clearing, when the content of 3% by weight of high-alkyl fluorinated paraffins in the lubricant ranges from 115 to 130 ° C.

In order to eliminate these drawbacks, the products of the fluorination reaction are proposed, after neutralization and washing with a solvent, to be subjected to vacuum distillation with separation of the fraction with m.p. 175-230710 mm Hg Art. and filtering lead at 55-65 ° C.

It is recommended that the isolated high fluorinated paraffins be further purified by filtration at 190–200 ° C.

The described method is illustrated in the drawing. The technology of obtaining fluororonfine includes the following operations.

1. The fluorination operation was carried out in a pickle apparatus at 100-170 ° C. Paraffins are introduced into a mixture of cobalt trifluoride and copent grease K, C (liquid fraction), mixed in a 1: 1 ratio.

2. The stripping process - condensation is carried out for 4-6 hours. A pair of fluorocarbon lubricant with fluorinated paraffin condensed in condensers and poured into containers.

3. Syrup is neutralized with soda solution.

4. Filtration of cobalt fluoride is carried out on a suction filter at 70-80 ° C.

5. Wash lead with acetone at 45-50 ° C for 3-4 hours.

6. The mixture is dispersed into two fractions: the first fraction is taken in the range from 145 to, and the second from 175 to 230 ° / 10 mm Hg. Art.

7. High-boiling fluoroparaffy is extracted by filtration of the second fraction at 55-65 ° C. The first fraction and the liquid fraction from the filtration of the second fraction return 1 to the beginning of the process to prepare a mixture of cobalt fluoride and a lubricant for liquid phase fluorination.

8. High-boiling fluoro-paraffins free from grease residues by treatment with freon 112. A mixture of fluoro-paraffins with this freon.

filtered under vacuum. Fluorinated dry from the remnants of freon 112.

9. Fluorine paraffins after drying are melted at 190-200C and passed through a filter to remove mechapic particles from fluoroparaffia.

After filtration, the fluoroparaffies are ready for use.

Example. As a result of liquid phase fluorination, 109 kg of a mixture of fluorocarbon lubricant and fluorinated paraffins is obtained. The weight of the mixture after washing is 98 kg. The weight of the second fraction is 60 kg.

Received pure fluoroparaffy 1.1 kg.

Subject invention

Claims (2)

1. The method of obtaining high-boiling ndh fluoronarapids by fluorinating paraffins followed by neutralization of the reaction products, washing with a solvent and isolating the target product by filtration, distinguishes nj, so that The results of the mixtures of the obtained fluoroparaffins from the liquid fraction of the lubricant KS are given in the table. The results of the analysis of the lubricant KS with the introduction of the obtained fluorinated paraffin Washing with solvent is subjected to vacuum distillation with the selection of the fraction with temp. kin 175-230 ° C / 10 mm Hg. Art. and filtering is carried out at 55-65 ° C. 2. A method according to claim 1, characterized in that the high boilers, and fluorinated paraffins are subjected to additional filtration at 190-200 ° C.