SU615059A1 - Mixture of polybranched monocarboxylic acids as salt-forming agent and method of obtaining same - Google Patents

Description

The invention relates to a mixture of poly-branched monocarboxylic acids (whites) that can be used as a salt-forming agent in extraction processes, as well as in the paint industry, and to a method for its preparation.

The mixture of multi-branched monocarboxylic acids has the following structural formula T

H (CH (1H2) „- C-COOH

R "2

where R is methyl - or ethyl radical; R is propyl, butyl, hexyl; R2-. alkyl; G 1-5.

It is known to use a mixture of naphthenic carboxylic acids as salt-forming agents, for example, in the preparation of drying agents. The content of metal salts in siccate is significantly lower.

theoretically possible concentration, which is uneconomical for industrial use.

Therefore, the discovery of new compounds,

suitable as salt formers, is of great practical importance.

It was found that the presence of monocarboxylic acid molecules in the cC position to the carboxyl group

and alkyl groups at different positions in the carbon chain of the molecule provides advantages to the driers based on a mixture of polybranched monocarboxylic acids with an average number of atoms

mov carbon in the acid molecule is 6-25.

In talb. 1 shows experimental data showing the effectiveness of the use of acids (PORK) as

The salt-forming agent for the preparation of siccatives, the later ones differ in almost theoretical metal content, which is not possible to achieve using currently known

mixtures of (| genic acids.

Table 1

Piggy

Manganese

Zinc In the literature, there is a known method for the preparation of isomeric aliphatic acids, which consists in the fact that a mixture of aliphatic Cj-C-acids is telomereated with ethylene at 50–18 ° C and a pressure of 20-250 atm in the presence of an initiator. A known mixture of acids contains alkyl substituents only in the oC-position to the carboxyl group. The proposed method for the preparation of a mixture of poly-branched carboxylic acids is that oL-C-C-ol fin. subjected to telomerization with carbonic Cd-Cg-acids at 50-18 O pressure of 1-1OO at in the presence of an initiator. Under the conditions of the proposed method, the use of olefins provides, along with the telomerization process, the course of the rearrangement of radicals in the 1,3- and 1.5-position by migration of a hydrogen atom. Example. In a steel swinging autoclave, 8OO g of isobutyric acid, 16 g of tertiary butyl peroxide (PTB), propylene (up to an initial pressure of 37 atm at 152 C) are placed in the reaction mixture at 150-155 for 2.5 hours. After distillation The initial residue of the products — a mixture of telomers — is 56 g (7% by weight of the loaded acid). This mixture is fractionated in the range of 75-190 C 3 mm; 78 g of mixture are obtained; composition and characteristics are given in table. 2. Example 2. The experiments were carried out under the conditions described in Example 1. 8OO g of isobutyric acid, 30 g of PTB were taken into the experiment, the initial pressure of propylene at 15 ° C was 45 atm. Reaction time was 3 hours. Under these conditions, СГГН ГпгдпмcJот 1 Д,

20 6

8 T of the loaded acid (150 g), 108.5 g of the telomere mixture are dispersed with separation of the fraction, the composition and characteristics of which are given in Table. 2. PRI me R 3. The reaction conditions are analogous to those described in Example 1. 80 o g of propionic acid are taken into the experiment, 30 g of PTB pressure of propylene at 15 ° C is 66 atm. The reaction time is 2 hours. The yield of a mixture of telomers after the initial distillation is 88 g (11% by weight, based on the weight of the reaction mixture) 88.1 g of a mixture of telomers is fractionated in the range of 40-15 ° C (2 mm Hg). The composition and characteristics of the fraction (see tab. 2). EXAMPLE 4 92 g of caproic acid, 25 ml of butene, 1 and 5 f of tert-butyl peroxide are loaded into a glass duck. The closed duck is heated at 140-145 ° C for 6 hours. After distilling off the starting mixture, the yield of the telomere mixture is 15 g (17% per loaded acid). The above mixture is fractionated in the range of 50-170 ° C (2 mmHg). The composition and characteristics are given in table. 2, Example 5, B of the experiment conducted under the conditions of Test 1, 800 g of butyric acid, 48 g of tert-butyl peroxide and propylene are taken to a pressure of 9 atm at 20 ° C. The reaction mixture is heated at 155 ° C for 2 hours. The pressure of propylene at 150 ° C is 80 atm. The yield of a mixture of telomers is 14% by weight of the loaded acid. After the initial residue has been distilled off (180 g), it is fractionated in the range of 75-190 C (3. mm Hg), a fraction of 78 g is obtained (yield 10% on 3); and ferric acid; Composition and Characteristics of Ph.o Formula of the Invention 1. A mixture of half-branched mono-acids of side acids of the general formula 1 n (Clnn. = C-coon where R is methyl or aryl radical; propyl, butyl, hexyl | C – Cd-alkyl; And - 1 - 5, as a co-image of the agent. 2. The preparation of a mixture of the acids of Formula 1, characterized in that ol - olefins containing from 3 to 4 carbon atoms, is subjected to telo-ivrization with normal carboxylic acids or iso-structure () at a temperature of 50-180 ° C and a pressure of 1-100 atm in the presence of radial initiators. Sources of information taken into account in the examination of the 1: Preparation report relating siccatives based on branched acids Tashkent sky paint plant 25/11/74 2, Copyright certificate № 1394O5, cl B 22 D 7 / 1O, 07.25.66.....