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2 261 857

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(51)

IPC

(21) (22)

Application

2004114526/04, 2004-05-12

(24)

Start date

2004-05-12

(22)

Actual filing date

2004-05-12

(45)

Published

2005-10-10

(72)

Inventor

Danov S.M.Balashov A.L.Logutov I.V.

(73)

Holder

Gosudarstvennoe Obrazovatel'Noe Uchrezhdenie Vysshego Professional'Nogo Obrazovanija Nizhegorodskij Gosudarstvennyj Tekhnicheskij Universitet

METHOD FOR METHYLAL PRODUCTION Russian patent published in 2005 - IPC

Abstract RU 2261857 C1

FIELD: chemical technology, in particular production of formaldehyde derivatives.

SUBSTANCE: disclosed is continuous method for methylal production from aqueous solutions of formaldehyde and methanol in presence of tungstic heteropolyacid (silicotungstic and phosphotungstic acids) catalyst in rectifier reactor, wherein simultaneously chemical reaction is carried out and product is rectified or distilled from reaction zone. Further catalyst (heteropolyacid) is isolated from slop by water vaporization and recycled.

EFFECT: environmentally friendly method with decreased cost and energy consumption.

2 ex, 1 dwg

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RU 2 261 857 C1

Authors

Danov S.M.

Balashov A.L.

Logutov I.V.

Dates

2005-10-10—Published

2004-05-12—Filed