SU571506A1 - Method of preparing synthetic fatty acids - Google Patents

Description

(54) METHOD FOR OBTAINING SYNTHETIC GIC FATTY ACIDS

The invention relates to a method for the production of synthetic fatty acids (FFA), which are widely used in the manufacture of detergents, lubricants, synthetic rubber, and rescue agents.

There is a known method for the release of FFA by catapic oxidation of paraffin wax with a subsequent oxidation of the oxidate with a 25% sodium carbonate solution and a 4O% sodium hydroxide solution at 9O - 10v5 C and by heat treatment of the resulting pH at 320-350 ° C.

The resulting mixture of acids has an acid number of 265.2, an ester of 2.7, a carbonyl number of 14.5 mg KOH / G, YO) the number of 11.5 g of iodine / 1OO g of c contains 1.7% non-pouring ij.

However, the yield of the technical mixture of acid pumps (acid number 265.2 mg / KOH / g) is not sufficiently high, and the utilization of sulfate heat, and priming) years) when extracting liquids is difficult.

The chain of the invention is an increase in the yield of the target product and simplification of the technology is achieved by the fact that saponification of products

paraffin oxides are 0.5 2O% or 40-55% - with M aqueous solution of hydroxide capi at lO S-ieo C, and heat treatment of soap kpe - at 35O-38O C.

When saponified with an aqueous solution of hydroxide of kaai, potassium supiphat is obtained - valuable potash free fertilizer, which completely eliminates the stage of utilization,

In addition, when used, potassium hydroxides get more heat-resistant and lower melting potassium soaps, which allows saponification to heat treatment at higher temperatures and thereby increase the intensity of the process and the yield of the technical mixture of acids by lO12% (see Table 1).

Example: At the pilot plant, the oxydate of the oxidate and solid paraffin wax (GOST 1696O-71) is carried out with an aqueous solution of Kalya markstone hydroxide with further autoclaving at 18 ° С, heat treatment of sulphae with 35O and decomposition of sulfuric soaps

acid to obtain a technical mix of pumps.

Lp source oxide kispotnoy Chispo

72.0, ester pH 50.0, carbonyl number-nor, obtained by washing the oxidate,

5-7 mg KOH / G, water content 5% hydroxide of capi or sodium 1 in industrial fatty acids 35.0 wt.% (foam foam) are given in tab. 2

Example 2. In the same time period, that. The output of the technical mix is accepted in practice (fnmera 1, the saponification of that is strictly the same in both cases).

Predictable

(from paraffin wax)

240.5

Pr) Yarned (z liquid paraffins)

27O, 3

Known (from solid paraffin I)

Known (from liquid paraffins)

oxidate 20%. water solution. o-hydroxide capi.

Characteristics of the technical mix acid table 1.

1X8 2.2

2,913,5

12,412, -0 1,5

2.6

16.0 13.5 2.4

237.3

3.0

2.7

14,511.5 1.7

265.2

45% solution hydroqua capi

20% solution of gizroogsisi kapi

Sodium hydroxide (in industry) of the invention was invented 1. Spassed from the synthesis of synthetic paraffin by oxidation, followed by saponification of oxidation products by silk, heat treatment of soap kpe at elevated temperature and distribution of the soap kp with mineral marts from the MR, responding to an increase in temperature and distribution of the soap kp by using minerals from the MR, which wasn’t too white, I use the same pattern, I didn’t use the same pattern, I didn’t get the same pattern, I used MNR, but I didn’t get the same pattern, I used the mineral water, I got rid of it, I used the product, I’m using the mineral water, I’m getting rid of the oxidation products. technology about ipeni

Tabpitsa2

14,012,81,7

239.5

2.7

12,012,61,8

2.4

240.1

16, O12,52,1

238.2

2.9 conduct 0.5–20% NPA to aqueous solutions of hydroxyhydroxy capi at 1O5–18О® С, and heat treatment of soap krteH - at 35О-380 С. ., Mankovska N.K., Shiman A.M.-, Givodvodstvo synthetic fatty acids, M. | Pishepromizdat, i960, with. 45-54.