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(19)

(11)

2 706 701

(13)

(51)

IPC

C07C51/43(2006-01-01)

C07C59/153(2006-01-01)

(21) (22)

Application

2019127543, 2019-09-02

(24)

Start date

2019-09-02

(22)

Actual filing date

2019-09-02

(45)

Published

2019-11-20

(72)

Inventor

Lyapunova Mariya VyacheslavovnaBakibaev Abdigali AbdimanapovichBotvin Vladimir Viktorovich

(73)

Holder

Federalnoe Gosudarstvennoe Avtonomnoe Obrazovatelnoe Uchrezhdenie Vysshego Obrazovaniya Natsionalnyj Issledovatelskij Tomskij Gosudarstvennyj Universitet Ni Tgu)

METHOD OF PRODUCING CRYSTALLINE GLYOXALIC ACID Russian patent published in 2019 - IPC C07C51/43 C07C59/153

Abstract RU 2706701 C1

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing crystalline glyoxalic acid. Method is carried out by concentration of aqueous solution of glyoxalic acid with mass concentration of 50 % on a rotary evaporator at residual pressure of 15 mbar and temperature of 40 °C to weight concentration of glyoxalic acid 80–87 %. Then the solution is diluted with water to mass concentration of glyoxalic acid of 77–80 % and left at room temperature for 5 days.

EFFECT: improved method of producing crystalline glyoxalic acid.

1 cl, 1 ex

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RU 2 706 701 C1

Authors

Lyapunova Mariya Vyacheslavovna

Bakibaev Abdigali Abdimanapovich

Botvin Vladimir Viktorovich

Dates

2019-11-20—Published

2019-09-02—Filed