Carbo chlorination of AlPO.sub.4

Details Carbo chlorination of AlPO.sub.4 Carbo chlorination of AlPO.sub.4

1973-12-19

1976-01-27

Vertiz, Oscar R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423305, 423318, 423496, 423625, 423630, C01B 2512, C01F 702

Patent

active

039352978

ABSTRACT:
A process of carbo-chlorination of AlPO.sub.4 wherein AlPO.sub.4 or AlPO.sub.4 -containing material is introduced into a reactor along with chlorinating agents and a source of carbon. The reactor is heated to approximately 600.degree. to 1200.degree.C and forms aluminum chlorides, phosphorous oxides, phosphorous chlorides, phosphorous oxychlorides and carbon oxides. These reaction products are then separated into three fractions by condensation, the first fraction being P.sub.2 O.sub.5, the second fraction being AlCl.sub.3 and AlCl.sub.3 .POCl.sub.3 and the third fraction being remaining gasses, namely PCl.sub.3, PCl.sub.5, P.sub.2 O.sub.3, CO and CO.sub.2. The second fraction is reacted in a further reactor to give AlCl.sub.3 and P.sub.2 O.sub.3 which are separated by distillation. The phosphorous chlorides from the third fraction are oxidized, along with the P.sub.2 O.sub.3 of the second fraction, to form P.sub.2 O.sub.5.

REFERENCES:
patent: 2812239 (1957-11-01), Porter
patent: 2903338 (1959-09-01), Porter
patent: 3241917 (1966-03-01), Lapple
patent: 3343945 (1967-09-01), Biggar

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