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2 186 053

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IPC

(21) (22)

Application

2000115710/04, 2000-06-15

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Start date

2000-06-15

(22)

Actual filing date

2000-06-15

(45)

Published

2002-07-27

(72)

Inventor

Safin D.Kh.Gajfutdinov G.Sh.Il'Jasov G.L.Makarov G.M.Ashikhmin G.P.Chebareva A.I.Mitaev R.R.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo

FIBER-PURITY MONOETHYLENE GLYCOL PRODUCTION PROCESS Russian patent published in 2002 - IPC

Abstract RU 2186053 C2

FIELD: industrial organic synthesis. SUBSTANCE: process is realized by non-catalytic hydration of ethylene oxide at 150-190 C utilizing recycle water to prepare reaction blend. Concentration of acetaldehyde 0.00005-0.001% is maintained by way of preliminarily distilling away aldehydes from water recycle stream after the first evaporation apparatus before blend preparation stage or by treating recycle water with sodium borohydride. EFFECT: increased purity of monoethylene glycol due to reduced formation of organic pollutants and decreased loss of monoethylene glycol during isolation stages. 2 cl, 2 dwg, 7 ex

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RU 2 186 053 C2

Authors

Safin D.Kh.

Gajfutdinov G.Sh.

Il'Jasov G.L.

Makarov G.M.

Ashikhmin G.P.

Chebareva A.I.

Mitaev R.R.

Dates

2002-07-27—Published

2000-06-15—Filed