Bituminous product and process for preparing it
OwnerDominique Dupuis, Gilles Orangeinventors
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Abstract
The subject of the present invention is a process for preparing a bituminous product, characterized in that a compound based on a phosphoric or polyphosphoric acid supported on a mineral oxide of high porosity is used. The subject of the invention is also the bituminous product that can be obtained by the above process, and its uses.
Claims14
Process for preparing a bituminous product, characterized in that a compound based on a phosphoric or polyphosphoric acid supported on a mineral oxide of high porosity is used.
Process according to either of the preceding claims, characterized in that the mineral oxide of high porosity is a mineral oxide having a pore volume of at least 3 ml/g.
Process according to one of the preceding claims, characterized in that the mineral oxide of high porosity is chosen from silicas, aluminas and aluminosilicates.
Process according to one of the preceding claims, characterized in that the mineral oxide of high porosity is chosen from silicas.
Process according to one of the preceding claims, characterized in that the phosphoric acid is orthophosphoric acid.
Process according to one of the preceding claims, characterized in that the polyphosphoric acid is chosen from pyrophosphoric acid or diphosphoric acid of formula H4P2O7, triphosphoric acid of formula H5P3O10, polyphosphoric acids of formula Hn+2PnO3n+1, metaphosphoric acids of formula HnPnO3n or a blend thereof.
Process according to one of the preceding claims, characterized in that the maximum amount of phosphoric or polyphosphoric acid employed corresponds to the maximum amount of the said acid that can be absorbed by the mineral oxide.
Process according to one of the preceding claims, characterized in that the compound is produced by a process which includes a dehydration step after the mineral oxide has been brought into contact with the phosphoric or polyphosphoric acid.
Process according to one of the preceding claims, characterized in that the compound is a hydrophobicized compound.
Dependencies are inferred from the claim text.