SU387966A1 - - Google Patents

Description

one

The invention of the Oliocite to the field of oluchuksii noligluku M) nova acid, which can find nutrient as an ion exchange material, is well known to obtain sourized cellulose cellulose by treating the latter with 1-50 / d solutions of NO2 or XY,) in the halogenir:; 64 hours However, with lime, a high consumption of nitrogen oxides and a long process (up to 64 hours) in the course of obtaining and the target product, containing 1 (25) c, is the theoretical amount of carboxyl

1 RUIN, i.e. NOLIG.T1O1.URONOV01 KIS.YUTA.

The proposed method makes it possible to obtain with x (; p () W 11 m 1 output (up to 96%) a homogeneous target product, using less: amounts;) nitrogen oxides, and the cellulose-containing material is subjected to treatment with liquid NO2 or N204 alkanoic or cycloalkan: iodine hydrocarbon and temperaure 38 ° C and liquid module 1:30.

Example 1. 5 with air-dry cellulose in medntsinsko gauze is treated with a mixture consisting of 30 ml of liquid NO2 or N904 and 120 ml of n-teksana, and 38 ° C for 19 hours. After a specified time has elapsed, the target product — noliglucuronic acid — is separated from the cpr-c- gel mixture, from 2

watered D11stilled | 1 with water until absent free a30THoi i acid and air dried.

The content of COOP - Gruin in the final product 23.5% nitrogen content of 0.0%. Exit 96,:)%.

Example 2. 5 g of air-cy.xoi cellulose in the form of medical gauze are placed in a mixture consisting of CZ ml of liquid NOz or N204 and 120 l / l of cyclohexane and kept in it for 19 hours at 38 ° C. Pel Nromat nromyut distilled water and dried in air. The content (X) of O11-g is g, the target product is 24.1%, the nitrogen content is 0 ,,. The yield is 92.5%.

Example 3. 5 air-dried medical gauze is placed in a mixture, in addition, from 30 ml of liquid NO2 or N204 and 120. or methylcyclohexane, and kept in it for 19 hours and 38 ° C. Pela Noir products are washed with distilled water and air dried.

The content of COOP-group is 24.7%, the nitrogen content is 0.0%. The yield is 94.4%.

PRI me R 4. 5 with air-dry medical gauze is treated with a mixture of 30 ml NOa or N004 and 120 ml methylcyclohexane, iri for 9 hours. The target product is tromped with distilled water and cvmaT in air. The content of COOH groups is 23.1%. The nitrogen content is 0.0%. Yield 91.5%. Example 5. 5 g of air-dry medical gauze are treated with a mixture of 10 ml of N02 or N204 and 140 ml of n-heptane at 38 ° C for 24 hours. After a predetermined time has elapsed, polyglucuronic acid is separated from the oxidizing mixture, washed with distilled water and air dried. The content of COOH-groups is 20.5%, the nitrogen content is 0.0%. Yield 90.0%. Example 6: 5 g air-dry medical gauze is treated with a mixture consisting of 10 ml of NO2 or N204 and 140 ml of methylcyclohexane at 38 ° C for 24 hours. The product is washed with distilled water and air dried. The content of COOH-groups is 20.9%, the nitrogen content is 0.0%. Yield 90.0%. The subject of the invention. A method for producing polyglucuronic acid by treating cellulose with nitrogen oxides in a solvent medium, characterized in order to simplify the process, an alkane or cycloalkane hydrocarbon is used as the solvent and the process is carried out at 38 ° C and a liquid modulus of 1:30.