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2 111 917

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IPC

(21) (22)

Application

97109876/25, 1997-06-11

(22)

Actual filing date

1997-06-11

(45)

Published

1998-05-27

(72)

Inventor

Lokshin Eh.P.

(73)

Holder

Institut Khimii I Tekhnologii Redkikh Ehlementov I Mineral'Nogo Syr'Ja Kol'Skogo Nauchnogo Tsentra Ran

METHOD FOR PURIFICATION OF PHOSPHOROUS PENTOXIDE Russian patent published in 1998 - IPC

Abstract RU 2111917 C1

FIELD: synthesis of highly pure phosphorous-containing compounds; purification of phosphorous pentoxide. SUBSTANCE: phosphorous is sublimated in vacuum at 370-400 C. Condensation is carried out either at temperature not less than 70 C while monolith polycrystalline product is prepared, or at temperature less than 70 C while powdery product is prepared. EFFECT: increased yield of desired product; increased rate of the process. 3 cl, 2 tbl

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RU 2 111 917 C1

Authors

Lokshin Eh.P.

Dates

1998-05-27—Published

1997-06-11—Filed

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