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EP0019431A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

A method for recovering vanadium from petroleum coke

Assignee: Tosco Corp Japan
•
Filing: 1980-05-09
•
Granted: —
•
Expires: 2000-05-09
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Abstract

Abstract To provide an economical method for the recovery of vanadium from petroleum coke containing inorganic compounds including vanadium, the coke is gasified with steam in the presence of an alkali metal salt gasification catalyst, such as potassium or sodium carbonate, to produce a combustible gas and an inorganic ash composed primarily of said inorganic compounds and a water soluble alkali metal vanadate. Preferred temperatures for the gasification are 535°C to 1100°C. The inorganic ash is placed in a sufficient amount of water to leach out the vanadate compound. The vanadium is then recovered. If the content of other water soluble material in the ash is low (say below about 25% of the total water soluble material), the vanadate is recovered directly from the leached solution, e.g., by precipitation. If that content is high, then an extraction with an organic solution of a known vanadium-extracting agent, such as a tertiary amine, is used.

Inventors

  • 👤 Frank C. Haas
  • 👤 William K. Hesse

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-03 09:15
CPC Classifications
C; C10; C10J; C10J3/00; C22; C22B; C22B34/00; C22B34/20; C22B34/22; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/0943; C10J2300/0953; C10J2300/0959; C10J2300/0973; C10J2300/0976; C10J2300/0983; C10J2300/0986

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 58 words
A method for recovering vanadium from petroleum coke characterised in that a steam gasification is carried out on the petroleum coke in the presence of an alkali metal salt gasification catalyst to yield a combustible gas and an inorganic ash containing a water- soluble alkali metal vanadate, and the water-soluble vanadate is leached from the ash with water.
Claim 2
Independent Claim 58 words
A method for recovering vanadium from petroleum coke characterised in that a steam gasification is carried out on the petroleum coke in the presence of an alkali metal salt gasification catalyst to yield a combustible gas and an inorganic ash containing a water- soluble alkali metal vanadate, and the water-soluble vanadate is leached from the ash with water.
Claim 3
Dependent Claim 21 words
A method according to claim 1 wherein the petroleum coke contains about 0.5% to about 2% by weight of inorganic compounds.
Claim 4
Dependent Claim 20 words
A method according to claim 1 or claim 2 wherein the gasification temperature is between about 5350c and about 11000C.
Claim 5
Independent Claim 22 words
A method according to any one of the preceding claims wherein the catalyst is a carbonate or hydroxide of an alkali metal.
Claim 6
Dependent Claim 14 words
A method according to claim 4 wherein the catalyst is sodium or potassium carbonate.
Claim 7
Independent Claim 31 words
A method according to any one of the preceding claims wherein the amount of catalyst is between about 4% and about 40% based on the total weight of coke and catalyst.
Claim 8
Independent Claim 27 words
A method according to any one of the preceding claims wherein a catalyst and coke mixture is fluidized in the presence of steam, for said steam gasification.
Claim 9
Dependent Claim 17 words
A method according to claim 7 wherein the inorganic ash is entrained in the combustible gas produced.
Claim 10
Independent Claim 56 words
A method according to any one of the preceding claims wherein the inorganic ash contains water-soluble compounds of which more than about 25% are other than the water-soluble vanadate and wherein the vanadate is recovered from the leached solution of said compounds by extraction with a solution of a vanadium extracting agent in an organic solvent.
Claim 11
Dependent Claim 17 words
A method according to claim 9 wherein the vanadium extracting agent is a tertiary or quaternary amine.

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