Patent US4476713A successfully refreshed from Google Patents.
US4476713A
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Liquid chromatographic separation of hydrocarbons
Assignee: Varian Medical Systems Inc
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Filing: 1982-08-31
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Granted: 1984-10-16
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Expires: 2002-08-31
Abstract
Abstract There is disclosed a method for the separation and identification of components contained in hydrocarbon mixtures, such as paraffins, olefins, napthenes and/or aromatics, by liquid chromatography by use of a chromatographic column packed with a microparticulate material having a pore size of less than about 500 Å and possessing aromaticity, preferably polystyrene/divinyl benzene having a pore size of less than about 100 Å, the microparticulate material being slurry packed in a solvent medium. The hydrocarbon mixture is passed through the packed column using a mobile phase comprising a solvent having a solvent strength parameter, ε°, of less than about 0.1 such as a C 5 to C 8 alkane; and the paraffins, olefins, napthenes, and/or aromatics are separately eluted and identified. Also disclosed is an apparatus for the characterization and separation of paraffins, olefins, napthenes, and aromatics contained in hydrocarbon mixtures, the apparatus comprising: a chromatographic column packed with a microparticulate material having a pore size of less than about 500 Å and possessing aromaticity, and slurry packed in a solvent medium; an injector for injecting a sample of the hydrocarbon mixture into said column; a solvent reservoir and pump to provide a mobile phase to the column comprising a solvent having a solvent strength parameter, ε°, of less than about 0.1 such as a C 5 to C 8 alkane; and a detector to detect and identify the paraffins, olefins, napthenes, and aromatics as they are eluted from the column.
Inventors
- 👤 Thomas V. Alfredson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:38
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/26; G01N33/28; G01N33/2829; B; B01; B01D; B01D15/00; B01D15/08; C; C07; C07C; C07C7/00; C07C7/12; G01N30/00; G01N30/02; G01N30/88; G01N2030/8809; G01N2030/884; G01N2030/8854
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
79 words
A method for the separation of components contained in a hydrocarbon mixture which comprises: (a) providing a chromatographic column packed with a microparticulate material having a pore size of less than about 500 Å and possessing aromaticity, said microparticulate material being slurry packed in a solvent medium; (b) passing said hydrocarbon mixture through said packed column using a mobile phase comprising a solvent having a solvent strength parameter of less than about 0.1; and (c) eluting the separated components.
Claim 2
Independent Claim
79 words
A method for the separation of components contained in a hydrocarbon mixture which comprises: (a) providing a chromatographic column packed with a microparticulate material having a pore size of less than about 500 Å and possessing aromaticity, said microparticulate material being slurry packed in a solvent medium; (b) passing said hydrocarbon mixture through said packed column using a mobile phase comprising a solvent having a solvent strength parameter of less than about 0.1; and (c) eluting the separated components.
Claim 3
Dependent Claim
16 words
A method according to claim 1 wherein the hydrocarbon mixture contains paraffins, olefins, napthenes, and aromatics.
Claim 4
Dependent Claim
31 words
A method according to claim 1 wherein the microparticulate material has a pore size of less than about 100 Å and has a particle diameter of less than about 20 microns.
Claim 5
Dependent Claim
39 words
A method according to claim 1 wherein the flow rate of the mobile phase through the column ranges from about 0.1 milliliter per minute to 2.0 milliliters per minute in a pressure of from one atmosphere to 25 atmospheres.
Claim 6
Dependent Claim
16 words
A method according to claim 1 wherein the microparticulate material is a polystyrene/divinyl benzene particulate material.
Claim 7
Dependent Claim
27 words
A method according to claim 5 wherein the polystyrene/divinyl benzene microparticulate material has a pore size of about 40 Å and a diameter of about 8-10 microns.
Claim 8
Dependent Claim
18 words
A method according to claim 2 wherein the paraffins, olefins, napthenes, and aromatics are eluted in that order.
Claim 9
Dependent Claim
21 words
A method according to claim 1 wherein the microparticulate material is slurry packed in the column in a medium comprising n-hexane.
Claim 10
Dependent Claim
18 words
A method according to claim 8 wherein the mobile phase passed through the column is n-pentane or n-hexane.
Claim 11
Independent Claim
101 words
A method for the separation and analyses of paraffins, olefins, napthenes, and aromatics contained in a hydrocarbon mixture using chromatographic procedures, the steps comprising: (a) providing a chromatographic column packed with a polystyrene/divinyl benzene microparticulate material having a pore size of less than about 100 Å, said material being slurry packed in a solvent medium; (b) passing said hydrocarbon mixture through said packed column using a mobile phase comprising a solvent having a solvent strength parameter, ε°, of less than about 0.1; (c) eluting the paraffins, olefins, napthenes, and aromatics from said column; and (d) detecting the presence of said components.
Claim 12
Independent Claim
101 words
A method for the separation and analyses of paraffins, olefins, napthenes, and aromatics contained in a hydrocarbon mixture using chromatographic procedures, the steps comprising: (a) providing a chromatographic column packed with a polystyrene/divinyl benzene microparticulate material having a pore size of less than about 100 Å, said material being slurry packed in a solvent medium; (b) passing said hydrocarbon mixture through said packed column using a mobile phase comprising a solvent having a solvent strength parameter, ε°, of less than about 0.1; (c) eluting the paraffins, olefins, napthenes, and aromatics from said column; and (d) detecting the presence of said components.
Claim 13
Dependent Claim
21 words
A method according to claim 10 wherein the components are detected in step (d) by ultraviolet analyses or refractive index analyses.
Claim 14
Dependent Claim
20 words
A method according to claim 10 wherein the polystyrene/divinyl benzene microparticulate material is slurry packed in a medium comprising n-hexane.
Claim 15
Dependent Claim
14 words
A method according to claim 12 wherein the mobile phase is n-pentane or n-hexane.
Claim 16
Dependent Claim
27 words
A method according to claim 13 wherein the polystyrene/divinyl benzene microparticulate material has a pore size of about 40 Å and a diameter of about 8-10 microns.
Claim 17
Dependent Claim
19 words
A method according to claim 14 wherein the paraffins, olefins, napthenes, and aromatics are detected by refractive index analyses.
Claim 18
Dependent Claim
32 words
A method according to claim 10 wherein the flow rate of the mobile phase is about 0.1 milliliter per minute to 2.0 milliliters per minute at a pressure of about 1-25 atmospheres.
Claim 19
Independent Claim
109 words
An apparatus for the separation and identification of components contained in hydrocarbon mixtures which comprises: (a) chromatographic column packed with a microparticulate material having a pore size of less than about 500 Å and possessing aromaticity, said material being slurry packed in a solvent medium; (b) injection means for injecting a sample of the hydrocarbon mixture into said column; (c) solvent reservoir means and pump means to provide a mobile phase to said column comprising a solvent having a solvent strength parameter, ε°, of less than about 0.1; and (d) detector means to detect and identify the components of said hydrocarbon mixture as they are eluted from said column.
Claim 20
Independent Claim
109 words
An apparatus for the separation and identification of components contained in hydrocarbon mixtures which comprises: (a) chromatographic column packed with a microparticulate material having a pore size of less than about 500 Å and possessing aromaticity, said material being slurry packed in a solvent medium; (b) injection means for injecting a sample of the hydrocarbon mixture into said column; (c) solvent reservoir means and pump means to provide a mobile phase to said column comprising a solvent having a solvent strength parameter, ε°, of less than about 0.1; and (d) detector means to detect and identify the components of said hydrocarbon mixture as they are eluted from said column.
Claim 21
Dependent Claim
18 words
An apparatus according to claim 17 which includes recorder means to record the presence of the detected components.
Claim 22
Dependent Claim
18 words
An apparatus according to claim 18 wherein the detector detects the components by ultraviolet rays or refractive index.
Claim 23
Dependent Claim
27 words
An apparatus according to claim 17 wherein the microparticulate material comprises a polystyrene/divinyl benzene microparticulate packing which has a pore size of less than about 100 Å.
Claim 24
Dependent Claim
29 words
An apparatus according to claim 20 wherein the microparticulate material is slurry packed in said column in a medium comprising n-hexane and the mobile phase comprises n-pentane or n-hexane.
Claim 25
Dependent Claim
20 words
An apparatus according to claim 21 wherein the detector means detects for differences in refractive index between the eluted components.
Claim 26
Dependent Claim
44 words
An apparatus according to claim 20 wherein the polystyrene/divinyl benzene microparticulate material has a pore size of about 40 Å and a particle diameter of about 8-10 microns, the microparticulate material is packed in a medium comprising n-hexane and the mobile phase is n-hexane.
References Cited (Backward Citations)
US3966596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |