Process for increasing the mono-aromatic content of polynuclear-aromatic-containing feedstocks
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C10G-047/02
C07F-011/00
C07F-015/00
출원번호
US-0968934
(2008-01-03)
등록번호
US-8142645
(2012-03-27)
발명자
/ 주소
Zhou, Bing
Zhou, Zhenhua
Wu, Zhihua
출원인 / 주소
Headwaters Technology Innovation, LLC
대리인 / 주소
Workman Nydegger
인용정보
피인용 횟수 :
7인용 특허 :
182
초록▼
Hydrocarbons containing polynuclear aromatics, such as cycle oil and pyrolysis fuel oil (PFO), are upgraded using an catalyst complex that selectively cracks the polynuclear aromatic compounds to form higher value mono-aromatic compounds, such as benzene toluene, xylenes and ethyl benzene (i.e., BTX
Hydrocarbons containing polynuclear aromatics, such as cycle oil and pyrolysis fuel oil (PFO), are upgraded using an catalyst complex that selectively cracks the polynuclear aromatic compounds to form higher value mono-aromatic compounds, such as benzene toluene, xylenes and ethyl benzene (i.e., BTX). The catalyst complexes include a catalytic metal center and a plurality of organic ligands. During the hydrocracking procedure, the organic ligand preserves one of the aromatic rings of the polynuclear aromatic compounds while the catalytic metal breaks the other aromatic rings thereby yielding a monoaromatic compound.
대표청구항▼
1. A process for hydrocracking a refining by-product containing polynuclear aromatic compounds and increasing monoaromatic content, comprising: providing a refining by-product that includes polynuclear aromatic compounds;providing a plurality of oil-soluble catalyst complexes, each catalyst complex
1. A process for hydrocracking a refining by-product containing polynuclear aromatic compounds and increasing monoaromatic content, comprising: providing a refining by-product that includes polynuclear aromatic compounds;providing a plurality of oil-soluble catalyst complexes, each catalyst complex comprising, a catalytic metal; anda plurality of organic ligands bonded to the catalytic metal, each organic ligand comprising a carbon ring spaced apart from the catalytic metal by at least 1 atom;blending the plurality of catalyst complexes with the refining by-product to form a feedstock mixture; andhydrocracking the feedstock mixture in a reactor containing a catalyst and operating under hydrocracking conditions and in a manner so as to form a product having an increased monoaromatic content compared to the refining by-product, the catalyst in the reactor consisting essentially of the catalytic metal provided by the oil-soluble catalyst complexes. 2. A process as in claim 1, wherein the refining by-product is comprised of a by-product of a catalytic upgrading process. 3. A process as in claim 1, wherein the refining by-product is comprised of cycle oil and/or pyrolysis fuel oil (PFO). 4. A process as in claim 1, wherein the concentration of catalyst complexes in the feedstock mixture is in a range from about 1 ppm to about 1000 ppm. 5. A process as in claim 1, wherein the catalytic metal is selected from the group consisting of group VIB metals, group VIIIB metals, and combinations thereof. 6. A process as in claim 1, wherein the catalytic metal is selected from the group consisting of tungsten (W), molybdenum (Mo), chromium (Cr), nickel (Ni), cobalt (Co), iron (Fe), vanadium (V), titanium (Ti), manganese (Mn), and combinations thereof. 7. A process as in claim 1, wherein the content of monoaromatics in the feedstock mixture is increased by at least about 10 wt % during the hydrocracking reaction. 8. A process as in claim 1, wherein the feedstock mixture includes at least about 20 wt % polynuclear aromatics. 9. A process as in claim 1, wherein the Ramsbottom residue in the feedstock mixture is less than about 1 wt %. 10. A process as in claim 1, wherein the Ramsbottom residue is less than about 0.8 wt %. 11. A process as in claim 1, further comprising determining the monoaromatic content of the product of the hydrocracking reaction. 12. A process as in claim 1, wherein the organic ligand is selected from the group consisting of benzene carboxylic acid, naphthalene carboxylic acid, methylbenzoic acid, ethyl phenyl acetic acid, and combinations thereof. 13. A process as in claim 1, wherein the plurality of organic ligands are non-aromatic and include a carbon ring of at least six members. 14. A process as in claim 1, wherein at least a portion of the catalyst complexes have the following structure: wherein,M is a group VIB metal, a group VIIIB metal, or a base transition metal;L1 and L2 are ligand spacer groups with a first atom bonded to the aromatic group and a second atom bonded to the metal and providing a spacing of 2-6 atoms between the aromatic group and the metal;R1-R10 are independently a hydrogen, an alkyl group, or a bond to a ligand spacer group bonded to another metal atom; andX1-X4 are optional ligands bonded to the catalytic metal. 15. A process for upgrading cycle oil and increasing monoaromatic content, comprising: providing a hydrocarbon feedstock that is predominantly cycle oil obtained from a fluidized catalytic cracker, wherein the cycle oil comprises polynuclear aromatic compounds;providing a plurality of oil-soluble catalyst complexes, each catalyst complex comprising, a catalytic metal including catalyst metal ions, each catalyst metal ion having valence electrons; anda plurality of organic ligands bonded to the catalytic metal so that the valence electrons of at least a portion of the metal ions are all bonded to an organic ligand, each organic ligand comprising a carbon ring spaced apart from the catalytic metal by at least 1 atom;blending the plurality of catalyst complexes with the hydrocarbon feedstock to form a feedstock mixture; andhydrocracking the feedstock mixture in a reactor containing a catalyst and operating under hydrocracking conditions and in a manner so as to form a product having an increased monoaromatic content compared to the cycle oil, the catalyst in the reactor consisting essentially of the catalytic metal provided by the oil-soluble catalyst complexes. 16. A process as in claim 15, wherein the concentration of catalyst complexes in the feedstock mixture is in a range from about 1 ppm to about 1,000 ppm. 17. A process as in claim 15, wherein the catalytic metal is selected from the group consisting of group VIB metals, group VIIIB metals, and combinations thereof. 18. A process as in claim 15, wherein the content of monoaromatics in the feedstock mixture is increased by at least about 10 wt % during the hydrocracking reaction. 19. A process as in claim 15, further comprising determining the monoaromatic content of the product of the hydrocracking reaction. 20. A process for upgrading pyrolysis fuel oil and increasing monoaromatic content, comprising: providing a hydrocarbon feedstock that is predominantly pyrolysis fuel oil obtained from a steam cracking process used to make olefins, wherein the pyrolysis fuel oil includes polynuclear aromatic compounds;providing a plurality of oil-soluble catalyst complexes, each catalyst complex comprising, a catalytic metal; anda plurality of aromatic ligands bonded to the catalytic metal, each organic ligand comprising an aromatic ring spaced apart from the catalytic metal by at least 1 atom;blending the plurality of catalyst complexes with the hydrocarbon feedstock to form a feedstock mixture; andhydrocracking the feedstock mixture in a reactor containing a catalyst and operating under hydrocracking conditions and in a manner so as to form a product having increased monoaromatic content compared to the pyrolysis fuel oil, the catalyst in the reactor consisting essentially of the catalytic metal provided by the oil-soluble catalyst complexes. 21. A process as in claim 20, wherein the concentration of catalyst complexes in the feedstock mixture is in a range from about 1 ppm to about 1,000 ppm. 22. A process as in claim 20, wherein the catalytic metal is selected from the group consisting of group VIB metals, group VIIIB metals, base transition metals, and combinations thereof. 23. A process as in claim 20, wherein the content of monoaromatics in the feedstock mixture is increased by at least about 10 wt % during the hydrocracking reaction. 24. A process as in claim 20, further comprising determining the monoaromatic content of the product of the hydrocracking reaction.
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