Invention Grant
- Patent Title: Method of producing molecular profiles of isoparaffins by low emitter current field ionization mass spectrometry
- Patent Title (中): 通过低发射极电流场电离质谱法生产异链烷烃的分子谱的方法
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Application No.: US11702830Application Date: 2007-02-06
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Publication No.: US07671328B2Publication Date: 2010-03-02
- Inventor: Chang Samuel Hsu , Gary J Dechert , Haven S. Aldrich , Gerald D. Dupre
- Applicant: Chang Samuel Hsu , Gary J Dechert , Haven S. Aldrich , Gerald D. Dupre
- Applicant Address: US NJ Annandale
- Assignee: ExxonMobil Research and Engineering Company
- Current Assignee: ExxonMobil Research and Engineering Company
- Current Assignee Address: US NJ Annandale
- Agent Paul E Purwin; Liza Montalvo
- Main IPC: B01D59/44
- IPC: B01D59/44 ; H01J49/00
Abstract:
The present invention is devoted to an analytical method for directly determining carbon number and molecular weight distributions of isoparaffin mixtures. The analytical means uses low in-scan emitter-current field-ionization mass spectroscopy to substantially reduced or eliminated molecular ion fragmentation for isoparaffins, which allows direct measurement of isoparaffin molecular ions for their distributions. The analytical means is capable of directly characterizing isobutane to C50+ isoparaffins, covering naphtha to gas oil ranges.
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