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US 10,428,278 B2Granted
Method and system for producing aromatic hydrocarbons from a renewable resource
AssigneeChevron Phillips Chemical Company LP
InventorRyan W. Snell
Life of this patent
Estimating the term…
Abstract
Disclosed are a method and a system for producing bio-derived aromatic hydrocarbons from a renewable resource. More particularly, the disclosure provides for the co-location of a biomass reactor unit and an aromatization reactor unit to produce benzene from a renewable source such as plant mass. Hexane produced from cellulose in the biomass reactor unit can be converted to benzene in the aromatization reactor unit and hydrogen produced in the aromatization reactor unit can be used in the biomass reactor unit. Also described is the use of a mixture of bio-derived hexane produced from cellulose and naphtha in an aromatization process.
Claims25
A method for producing a bio-derived aromatic hydrocarbon, comprising:
- a) contacting a biomass with hydrogen in the presence of a hydrodeoxygenation catalyst in at least one hydrodeoxygenation reactor unit, under conditions that produce a bio-derived feedstock further comprising paraffinic, naphthenic, and/or olefinic hydrocarbons;
- b) introducing the bio-derived feedstock into at least one aromatization reactor unit and contacting the bio-derived feedstock with an aromatization catalyst under conditions that produce an aromatic hydrocarbon and hydrogen;
- and
- c) providing at least a portion of the hydrogen produced in the at least one aromatization reactor to the at least one hydrodeoxygenation reactor for contacting the biomass,
- wherein the biomass comprises a cellulose, a sugar, a starch, a lignocellulose, a hemicellulose, a lignin, or combinations thereof.
2 more elements
A reactor system for producing aromatic hydrocarbons comprising:
- a) a first feed pipe for supplying a first feed stream comprising naphtha;
- b) a second feed pipe for supplying a second feed stream comprising a bio-derived feedstock comprising paraffinic, naphthenic, and olefinic hydrocarbons, in which the second feed pipe combines with the first feed pipe to form a reactant stream pipe;
- c) a separation unit having an inlet and an outlet, situated in line with the first feed pipe, the second feed pipe, or the reactant stream pipe, configured to receive, respectively, the first feed stream, the second feed stream, or the reactant stream, and to discharge, respectively, a purified first feed stream, a purified second feed stream, or a purified reactant stream;
- d) an at least one aromatization reactor unit having an inlet to accept the reactant stream or the purified reactant stream, and further comprising an aromatization catalyst bed which converts at least a portion of the bio-derived feedstock to one or more aromatic hydrocarbons and hydrogen;
- and
- e) a biomass reactor unit located proximate to the at least one aromatization reactor unit which supplies the second feed stream comprising a bio-derived feedstock to the second feed pipe,
- wherein the hydrodeoxygenation reactor unit comprises an inlet configured to accept a starting material selected from cellulose, sugars, starch, lignocellulose, hemicellulose, lignin, or combinations thereof;
- and further comprises an outlet for discharging to the bio-derived feedstock to the second feed pipe.
5 more elements
A reactor system for producing aromatic hydrocarbons from a renewable source, the system comprising:
- a) at least one hydrodeoxygenation reactor unit comprising a first inlet for supplying a reactant stream comprising a biomass, a second inlet for supplying hydrogen, a hydrodeoxygenation catalyst bed, and an outlet for discharging a bio-derived feedstock into a first transfer pipe;
- b) at least one aromatization reactor unit proximate to the at least one hydrodeoxygenation reactor, comprising an inlet for supplying a reactant stream comprising the bio-derived feedstock from the first transfer pipe and naphtha from a second transfer pipe, an aromatization catalyst bed, and an outlet for discharging a reactor effluent stream comprising one or more aromatic hydrocarbons and hydrogen;
- c) a separation system for separating the reactor effluent into one or more aromatic hydrocarbons, hydrogen, and a raffinate;
- and
- d) a third transfer pipe for supplying the hydrogen from the separation system to the second inlet of the hydrodeoxygenation reactor unit,
- wherein the biomass comprises cellulose, sugars, starch, lignocellulose, hemicellulose, lignin, or combinations thereof.
3 more elements
A method for producing renewable styrene comprising:
- a) contacting a biomass with hydrogen in the presence of a hydrodeoxygenation catalyst in at least one hydrodeoxygenation reactor unit, under conditions that produce bio-derived feedstocks comprising hexanes;
- b) introducing the bio-derived feedstocks in combination with a naphtha reactant stream into at least one aromatization reactor unit and contacting the bio-derived feedstocks and naphtha with an aromatization catalyst under conditions that produce benzene and hydrogen;
- c) providing at least a portion of the hydrogen produced in the at least one aromatization reactor unit to the at least one hydrodeoxygenation reactor unit for contacting the biomass;
- d) contacting the benzene with ethylene under conditions to produce ethylbenzene, wherein the benzene comprises at least about 10 wt. % bio-derived benzene;
- and
- e) dehydrogenating the ethylbenzene to produce a styrene product,
- wherein the biomass comprises cellulose, sugars, starch, lignocellulose, hemicellulose, lignin, or combinations thereof.
4 more elements
Dependencies are inferred from the claim text.