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2 026 853

(13)

C1

(51)

IPC

(21) (22)

Application

4911579/04, 1991-01-09

(22)

Actual filing date

1991-01-09

(45)

Published

1995-01-20

(72)

Inventor

Kabakova Z.I.Nakrokhin V.B.Krank E.I.

(73)

Holder

Novosibirskij Khimicheskij Zavod

METHOD OF PENTAERYTHRITOL PREPARING Russian patent published in 1995 - IPC

Abstract RU 2026853 C1

FIELD: explosive substance production. SUBSTANCE: product: pentaerythritol, empirical formula is C5H12O4, yield is 85%, m. p. is 256-258 C, dipentaerythrite content is 0.3% , content of sugary substance is 0.003%. Calcium formate, empirical formula is C2H20O4Ca, yield is 36 kg per 1 mole acetaldehyde. Reagent 1: acetaldehyde. Reagent 2: formaldehyde. Reaction conditions: in aqueous medium in the presence of calcium oxide. Milk of lime (0.67 mole) is added to the reaction mass containing 72 moles water, 5.5 moles formaldehyde and 1 mole acetaldehyde, then condensation solution is heated up to the complete conversion of aldehydes and neutralized with 0.346-0.423 mole H2SO4 per 1 mole acetaldehyde. Then pentaerythritol is isolated firstly following by isolation of calcium formate. EFFECT: improved method of pentaerythritol preparing. 1 tbl

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RU 2 026 853 C1

Authors

Kabakova Z.I.

Nakrokhin V.B.

Krank E.I.

Dates

1995-01-20—Published

1991-01-09—Filed

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