SU294830A1 - METHOD OF OBTAINING COMPLEX POLYEPHI-CHR - -. ^ ETHYLENE GLYCOL - Google Patents

Description

12

This invention relates to a method for obtaining carbolic acidic compounds, i.e., for the formation of ethylene glycol ethylene glycol, a scientific research institute of complex ester communication, nanarmsr, which can be widely used in ethylene glycol ethers in chemical industry.

The preparation of these esters is based on the common 5 dichlorocarboxylic acids, known replacement of the active in a-position to the carboxyl halogen on the wasp-process in the well-known s.Pchae goes but to the scheme;

СНа-С1СП9 - СООКСП2-COOR

I + R-COONa- I-

СНа-ОНСП.ЮН + С1 (СН.,) „СОО СН, -COOCII.Cl.

Receiving new ethylene glycol esters having three, rather than one or two ester SHN-O-C-SP, C 1 CHA-O-C-SPG-OS -R

I + NaO-C -R- I

SJ ..- OC-R: SP., - OC-R

IIOII

oo

where R-butnl, amyl, octyl; R-ethyl, nro-25 Polyethylene glycol polyesters prepared the heating of the reaction mixture at an oily temperature without any higher than the boiling point, its odor and color, ne, soluble in water, but natural at 120–13 ° C . The proposed solution, which dissolves easily in organic solutions, makes it possible to synthesize a number of co-ordinates. dineny of this class. thirty

ny groups are carried out using the specified well-known methods according to the following scheme:

Example 1. Synthesis of ethylene glycol propoxyacetovevaleate

To a four-necked reaction flask equipped with a stirrer, thermometer, reflux condenser with a calcium chloride tube and an addition funnel, add 11.52 g (0.12 mol} of dry sodium sronionic acid and 30 ml of freshly distilled nropionic acid. For vigorous stirring, heat the mixture for 30 minutes up to 120 --- 125 ° С and 22.26 g (0.1 mol} of ethylene glycol a-mopochloracetovetaleate) for 15–20 minutes are added dropwise. After that, the heating is continued and the mixture is cooled for 30–40 minutes. give up to room temperature, sprinkled with water, treated with 0.2 % soda solution and again with water until neutral. After drying, the raw material is dried and distilled under vacuum in a vacuum, collecting the fraction with bale 128-130 ° C / 2 mmHg 17.55 g or 67.5 % of the target product in terms of a-monochloroacetovaleric ethylene;

Example 2. (Ethylene glyco butyroxpacetococronate;)

Into the reaction flask, a pipet of 13.32 g (0.12 mol) of the above sodium sulfate and salt oil and 30-40 ml of freshly distilled anhydrous butyric acid as solvent was used. With vigorous stirring, the mixture is heated to 120-125 ° C for 30 minutes and 23.66 g (0.1 mol) of a-monochloroacetocapronate ethylene glycol is added dropwise, heated for another 30-50 minutes When the reaction is complete, the mixture is cooled to room temperature, washed several times with water, treated with a 0.2% soda solution and again with water. After cyniKH, the raw material is dispersed under vacuum. 20.7 g of the desired fraction with m.p. 140--142 ° C / 1.5 mm Hg. Art. Yield 72% for ethylene glycol taken in the reaction of α-monochloroacetocapronate.

Subject and d on and e and

The method of obtaining polyether ethylene glycol compounds of formula

SP, - О-С-СПА-О-С-R

Ooh

SP, --- 0 - СR

where R-butyl, amyl, octyl; R-ethyl, propyl, characterized in that the corresponding fatty acid salts are reacted with the chlorine-containing diesters of ethylene glycol and heated to no higher than the boiling point of the reaction mixture with the next mixture by isolation of the desired product with known methods.