Complex composition resulting from the action of urea on a sulfuric sludge of petroleum origin, process for the preparation thereof and use thereof as a source of fertilizing material
AssigneesInstitut Francais du Petrole, Transvalor
InventorsDaniel Lonchamp, Yvan Schwob
Life of this patent
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Abstract
A complex composition formed by the product resulting from the action of urea on a sludge of petroleum origin containing by weight from 50 to 99% of sulfuric acid and from 1 to 20% of organic residues. The acid sludge may contain water and often comes from an alkylation reaction. This composition can be used as a source of fertilizing material or as a component of a fertilizing formulation.
Claims5
A process for the preparation of a fertilizer composition comprising reacting at a temperature which is at most equal to 75.degree. C. urea, a sulfuric sludge from an aliphatic alkylation reaction containing by weight 50 to 99% of sulfuric acid and 1 to 20% of organic residue and water, in an amount such that the molar ratio between the urea and the total acid contained in the sludge is from about 1:1 to about 4:1 and the molar ratio between the water and the total acid contained in the sludge is from about 1:1 to about 6:1, to form a liquid phase containing a sulfuric acid-urea complex and above the liquid phase a semi-solid hydrocarbon film;
- decanting the film from the solution obtained and recovering the fertilizer composition.
Dependencies are inferred from the claim text.