Conversion of a hydrocarbon feedstock derived from oxygen-rich biomass into aromatic isocyanates
AssigneeIfp Energies Nouvelles
InventorsCatherine LAROCHE, Ludovic CHAHEN
Life of this patent
Estimating the term…
Abstract
A device for converting an oxygen-rich hydrocarbon-based feedstock obtained from biomass, comprising: a pyrolysis unit; a water-gas shift WGS reaction section; a fractionation train suitable for extracting at least one cut comprising benzene, one cut comprising toluene, one cut comprising xylenes, and one cut comprising aromatic compounds with 9 and 10 carbon atoms; a nitration reaction section suitable for producing aromatic nitro compounds from at least one cut extracted from said fractionation train; a reduction reaction section; an isocyanate synthesis reaction section.
Claims14
A device for converting an oxygen-rich hydrocarbon-based feedstock obtained from biomass, comprising:
- a pyrolysis unit (1) suitable for producing, from a hydrocarbon-based feedstock derived from biomass (11), at least one cut comprising aromatic compounds (12), a gaseous effluent comprising at least carbon monoxide (9a), and water (10);
- a water-gas shift WGS reaction section (7) suitable for producing a gaseous stream (18) comprising hydrogen and carbon dioxide from the carbon monoxide (9a) and water (10) coming from the pyrolysis unit (1);
- a fractionation train (2) suitable for extracting at least one cut comprising benzene, one cut comprising toluene, one cut comprising xylenes, and one cut comprising aromatic compounds with 9 and 10 carbon atoms from said cut comprising aromatic compounds (12);
- a nitration reaction section (3) suitable for producing nitro aromatic compounds (14) from at least one cut extracted from said fractionation train (2);
- a reduction reaction section (4) suitable for producing aromatic amines (15) from the nitro aromatic compounds (14) and hydrogen from the water-gas shift WGS reaction unit (7);
- and
- an isocyanate synthesis reaction section (6) suitable for producing isocyanates (17) from the aromatic amines (15) from the reduction reaction section (4), and carbon dioxide from the water-gas shift WGS reaction section (7), or carbon monoxide (9b) from the pyrolysis unit (1).
A process for converting an oxygen-rich hydrocarbon-based feedstock, comprising the following steps:
- a) a hydrocarbon-based feedstock originating from biomass (11) is sent to a pyrolysis unit (1) in order to produce at least one cut comprising aromatic compounds (12), a gaseous effluent comprising at least carbon monoxide (9a), and water (10);
- b) the carbon monoxide (9a) and the water (10) obtained on conclusion of step a) are sent to a water-gas shift WGS reaction section (7) to produce a gaseous stream (18) comprising hydrogen and carbon dioxide;
- c) said cut comprising aromatic compounds (12) obtained on conclusion of step a) is sent to a fractionation train (2) to extract at least one cut comprising benzene, one cut comprising toluene, one cut comprising xylenes, and one cut comprising aromatic compounds with 9 and 10 carbon atoms;
- d) at least one extracted cut obtained on conclusion of step c) is sent to a nitration reaction section (3) to produce nitro aromatic compounds (14);
- e) said nitro aromatic compounds (14) obtained on conclusion of step d), the hydrogen obtained on conclusion of step b) are sent to a reduction reaction section (4) to produce aromatic amines (15);
- and
- f) said aromatic amines (15) obtained on conclusion of step e), and, the carbon dioxide obtained on conclusion of step b), or the carbon monoxide (9b) obtained on conclusion of step a) are sent to an isocyanate synthesis reaction section (6) to produce isocyanates (17).
Dependencies are inferred from the claim text.