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2 233 308

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IPC

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Application

2003116359/04, 2003-05-22

(24)

Start date

2003-05-22

(22)

Actual filing date

2003-05-22

(45)

Published

2004-07-27

(72)

Inventor

Khajrudinov I.R.Sultanov F.M.Ozerenko A.A.Karasev V.N.Tikhonov A.A.Krichko A.A.Teljashev Eh.G.Taushev V.V.Akhmetov M.M.

(73)

Holder

Gosudarstvennoe Unitarnoe Predprijatie Institut Neftekhimpererabotki

METHOD OF COKING OF COAL TAR Russian patent published in 2004 - IPC

Abstract RU 2233308 C1

FIELD: production of high-quality coke by slow coking.

SUBSTANCE: proposed method includes extraction of coal tar by mixture of aliphatic and aromatic solvents. Preliminarily, fraction is separated from coal tar at temperature of 80-230 C. Residue of coal tar boiling-off at temperature of 230 C is subjected to extraction. Used as mixture of aliphatic and aromatic solvents is mixture of white spirit and solvent boiling-off at temperature of 130-185 C at ratio of white spirit and solvent by mass of 2;1-3:1. Raffinate after distillation of said mixture of solvents, use if made of coal tar pitch at softening temperature of 85-95 C and distilled mixture of solvents is returned to extraction stage. Used as mixture of solvents is mixture of white spirit and solvent having density of 770-790 kg/cu m at temperature of 20 C and refraction index n20D

of 1.43-1.45.

EFFECT: enhanced separation of solvent form extracting agent; reduced power requirements.

2 cl, 1 tbl, 2 ex

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RU 2 233 308 C1

Authors

Khajrudinov I.R.

Sultanov F.M.

Ozerenko A.A.

Karasev V.N.

Tikhonov A.A.

Krichko A.A.

Teljashev Eh.G.

Taushev V.V.

Akhmetov M.M.

Dates

2004-07-27—Published

2003-05-22—Filed