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2 538 890

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(51)

IPC

C01G25/04(2006-01-01)

C01G27/04(2006-01-01)

(21) (22)

Application

2013141060/05, 2013-09-06

(24)

Start date

2013-09-06

(22)

Actual filing date

2013-09-06

(45)

Published

2015-01-10

(72)

Inventor

Arzhatkina Oksana AlekseevnaSerov Nikolaj Gennad'Evich

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Nauchno-Issledovatel'Skij Institut Khimicheskoj Tekhnologii"

METHOD OF SEPARATING ZIRCONIUM AND HAFNIUM TETRACHLORIDES BY EXTRACTIVE RECTIFICATION Russian patent published in 2015 - IPC C01G25/04 C01G27/04

Abstract RU 2538890 C1

FIELD: chemistry.

SUBSTANCE: method of separating zirconium and hafnium tetrachlorides by extractive rectification includes blending carrier-extractant with mixture ZrCl₄+HfCl₄, fusion of charge with obtaining homogenous melt, evaporation of zirconium and hafnium tetrachlorides from melt, condensation of hafnium-enriched steam in form of sublimate. As carrier-extractant applied is LiCl-AlCl₃, and evaporation of zirconium and hafnium tetrachlorides from melt is realised at temperature 320°C or 450°C.

EFFECT: increase of comparative volatility of zirconium and hafnium chlorides in separation of zirconium and hafnium tetrachlorides from mixture of their chlorides by extractive rectification.

2 tbl, 3 ex

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RU 2 538 890 C1

Authors

Arzhatkina Oksana Alekseevna

Serov Nikolaj Gennad'Evich

Dates

2015-01-10—Published

2013-09-06—Filed