US4493906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for the selective hydrogenation of acetylenes
Assignee: Dow Chemical Co
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Filing: 1983-12-05
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Granted: 1985-01-15
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Expires: 2003-12-05
Abstract
Abstract An improved catalyst for removal of acetylenes from liquid hydrocarbon streams with a minimum loss of diolefinic unsaturation present in said liquid composition is disclosed. The catalytic materials, basically copper metal impregnated on a gamma alumina support prepared from an organo aluminum compound. The support has properties not found in alumina prepared from naturally occurring precursors.
Inventors
- 👤 Mark C. Couvillion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:40
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/889; B01J23/8892; B01J23/72; B01J23/85; B01J23/89; B01J23/8926; C; C07; C07C; C07C7/00; C07C7/148; C07C7/163; C07C7/167; C10; C10G; C10G45/00; C10G45/32; C10G45/34; B01J21/00; B01J21/02; B01J21/04; B01J35/00; B01J35/60; B01J35/61; B01J35/613; B01J35/615; B01J35/63; B01J35/635; B01J35/66; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/70; C07C2523/72
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
158 words
A catalyst for removing α-acetylenes from liquid hydrocarbon streams consisting essentially of finely divided copper metal dispersed on an aluminum oxide support, said support being a gamma alumina as defined by the Joint Committee on Powder Diffraction Standards, #29-63, of high purity having a surface area of between about 68 and about 350 square meters per gram, and 98 to 40 percent of the pores have a pore diameter between about 40Å and 120Å and not more than 25 percent nor less than 2 percent have, a pore diameter between 1000Å to 10,000Å, a silicon content as SiO 2 of less than about 0.15 weight %, a sodium content as Na 2 O of less than about 0.15 weight %, a sulfur content less than about 0.01 weight % and an iron content as Fe 2 O 3 of less than about 0.06 weight %, said gamma alumina may contain up to 35% by weight of alpha alumina.
Claim 2
Dependent Claim
158 words
A catalyst for removing α-acetylenes from liquid hydrocarbon streams consisting essentially of finely divided copper metal dispersed on an aluminum oxide support, said support being a gamma alumina as defined by the Joint Committee on Powder Diffraction Standards, #29-63, of high purity having a surface area of between about 68 and about 350 square meters per gram, and 98 to 40 percent of the pores have a pore diameter between about 40Å and 120Å and not more than 25 percent nor less than 2 percent have, a pore diameter between 1000Å to 10,000Å, a silicon content as SiO 2 of less than about 0.15 weight %, a sodium content as Na 2 O of less than about 0.15 weight %, a sulfur content less than about 0.01 weight % and an iron content as Fe 2 O 3 of less than about 0.06 weight %, said gamma alumina may contain up to 35% by weight of alpha alumina.
Claim 3
Dependent Claim
120 words
A catalyst for removing α-acetylenes from liquid hydrocarbon streams consisting essentially of a support having thereon finely divided copper metal said support being a substantially high purity gamma alumina as defined by the Joint Committee on Powder Diffraction Standards #29-63, having a surface area of at least about 68 to about 350 square meters per gram, and 98 to 40 percent of the pores have a pore diameter between about 40Å and 120Å and not more than 25 percent nor less than 2 percent have a pore diameter between 1000Å to 10,000Å, and having a sodium content less than about 0.10% and SiO 2 being less than 0.15% and which may contain up to 35% by weight of alpha alumina.
Claim 4
Dependent Claim
120 words
A catalyst for removing α-acetylenes from liquid hydrocarbon streams consisting essentially of a support having thereon finely divided copper metal said support being a substantially high purity gamma alumina as defined by the Joint Committee on Powder Diffraction Standards #29-63, having a surface area of at least about 68 to about 350 square meters per gram, and 98 to 40 percent of the pores have a pore diameter between about 40Å and 120Å and not more than 25 percent nor less than 2 percent have a pore diameter between 1000Å to 10,000Å, and having a sodium content less than about 0.10% and SiO 2 being less than 0.15% and which may contain up to 35% by weight of alpha alumina.
Claim 5
Dependent Claim
136 words
A catalyst for removing α-acetylenes from liquid hydrocarbon streams consisting essentially of a support having thereon finely divided copper metal said support being a substantially high purity gamma alumina as defined by the Joint Committee on Powder Diffraction Standards #29-63, having a surface area of at least about 68 to about 350 square meters per gram, and 98 to 40 percent of the pores have a pore diameter between about 40Å and 120Å and not more than 25 percent nor less than 2 percent have a pore diameter between 1000Å to 10,000Å, and having a sodium content less than about 0.10% and SiO 2 being less than 0.15%, and which may contain up to 35% by weight of alpha alumina, said copper metal being present in from about 3 to 13 weight percent of the support.
Claim 6
Dependent Claim
136 words
A catalyst for removing α-acetylenes from liquid hydrocarbon streams consisting essentially of a support having thereon finely divided copper metal said support being a substantially high purity gamma alumina as defined by the Joint Committee on Powder Diffraction Standards #29-63, having a surface area of at least about 68 to about 350 square meters per gram, and 98 to 40 percent of the pores have a pore diameter between about 40Å and 120Å and not more than 25 percent nor less than 2 percent have a pore diameter between 1000Å to 10,000Å, and having a sodium content less than about 0.10% and SiO 2 being less than 0.15%, and which may contain up to 35% by weight of alpha alumina, said copper metal being present in from about 3 to 13 weight percent of the support.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-15 | 1988-07-16 | 1989-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-15 | 1992-07-16 | 1993-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-15 | 1996-07-16 | 1997-01-15 | $7700.00 | Window Closed / Lapsed |