Chromatographic analyzer

Details Chromatographic analyzer Chromatographic analyzer

1987-11-16

1991-09-17

Lacey, David L.

Chemistry: analytical and immunological testing

Hydrocarbon

Aromatic

436141, 436142, 422 89, 422 93, 73 2338, 55386, G01N 3300

Patent

active

050495097

ABSTRACT:
Methods and apparatus for analyzing a hydrocarbon sample are provided. The apparatus employs a highly polar column to separate the aromatics from non-aromatic components. The non-aromatic effluent from the highly polar column is passed to a 13X MSCOT column and a first less polar column. In a second configuration the highly polar column is backflushed into a second less polar column. The 13X MSCOT column separates isoparaffins, normal paraffins, and naphthenes by carbon number while the first less polar column individually separates the paraffins and naphthenes. The second less polar column is employed to separate individual aromatics.
The method for analyzing a hydrocarbon sample separates the aromatics of the sample from the isoparaffins, normal paraffins, and naphthenes. The isoparaffins, normal paraffins, and naphthenes are then separated and detected by carbon number. Simultaneously, the individual non-aromatic components are separated and detected. The aromatics that have been previously separated are then individually separated and detected.

REFERENCES:
patent: 3654145 (1972-04-01), Brunnock et al.
patent: 4204952 (1980-05-01), Snyder
patent: 4384471 (1983-05-01), Wentzel
patent: 4446105 (1984-05-01), Dinsmore et al.
patent: 4534207 (1985-08-01), Szakasits et al.

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