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2 440 324

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IPC

C07C31/24(2006-01-01)

C07C29/38(2006-01-01)

(21) (22)

Application

2010137090/04, 2010-09-06

(24)

Start date

2010-09-06

(22)

Actual filing date

2010-09-06

(45)

Published

2012-01-20

(72)

Inventor

Samokhvalov Ivan IvanovichAvramenko Ehl'Vira VladimirovnaBibakova Tat'Jana Anatol'EvnaSemerikov Andrej BorisovichBudin Dmitrij VeniaminovichPostonogov Ehduard Aleksandrovich

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo

METHOD OF PRODUCING PENTAERYTHRITOL USING PARAFORMALDEHYDE Russian patent published in 2012 - IPC C07C31/24 C07C29/38

Abstract RU 2440324 C1

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing pentaerythritol, involving condensation of formaldehyde with acetyldehyde in the presence of sodium hydroxide, rectification and evaporation of the condensed solution, vacuum crystallisation, filtration, washing the obtained technical pentaerythritol, recrystallisation, filtration and drying the pentaerythritol. The formaldehyde is used in form of a mixture of formalin and paraformaldehyde, where the paraformaldehyde constitutes up to 1/5 of the total amount of formaldehyde in the reaction mixture, the components being in the following molar ratio: acetaldehyde 1; formaldehyde 8.4-8.5; sodium hydroxide 1.15-1.20; water 70-72.

EFFECT: method increases efficiency of the process while ensuring high quality of the ready product.

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RU 2 440 324 C1

Authors

Samokhvalov Ivan Ivanovich

Avramenko Ehl'Vira Vladimirovna

Bibakova Tat'Jana Anatol'Evna

Semerikov Andrej Borisovich

Budin Dmitrij Veniaminovich

Postonogov Ehduard Aleksandrovich

Dates

2012-01-20—Published

2010-09-06—Filed