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2 005 539

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C1

(51)

IPC

(21) (22)

Application

5023497/04, 1992-01-22

(22)

Actual filing date

1992-01-22

(45)

Published

1994-01-15

(72)

Inventor

Kramerova G.E.Lerner O.I.Jurchenko Eh.N.

(73)

Holder

Nauchno-Proizvodstvennoe Ob"Edinenie Institut Prikladnoj Khimii"

PROCESS FOR MANUFACTURING CATALYST FOR VAPOR PASE FLUORINATION OF HALOGENOHYDROCARBONS Russian patent published in 1994 - IPC

Abstract RU 2005539 C1

FIELD: manufacture of catalytic materials. SUBSTANCE: magnesium compound is treated with fluoric acid at 20-80 C to obtain suspension with final pH value of 3-6. The precipitated magnesium fluoride with particulate size of 10-250 microns is dried at 300-550 C and mixed with solution of chromic chloride having density 1.35-1.38 g/cm3. The resulting mixture is pelletized, and the pellets are treated thermally at 50-200 C and activated with hydrogen fluoride-containing gas at 100-450 C. The resulting catalyst includes 10-15 % by weight of chromic fluoride and 85-90 % by weight of magnesium fluoride, and has specific particle surface 50-100 m2/g, polydispersion porous structure and acts more 1000 hrs. EFFECT: increased durability.

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RU 2 005 539 C1

Authors

Kramerova G.E.

Lerner O.I.

Jurchenko Eh.N.

Dates

1994-01-15—Published

1992-01-22—Filed

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