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1. (WO1992010738) DETERMINATION OF AROMATICS IN HYDROCARBONS BY NEAR INFRARED SPECTROSCOPY
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1992/010738 International Application No.: PCT/US1991/006193
Publication Date: 25.06.1992 International Filing Date: 29.08.1991
Chapter 2 Demand Filed: 07.05.1992
IPC:
G01N 21/35 (2006.01) ,G01N 33/28 (2006.01)
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21
Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light
17
Systems in which incident light is modified in accordance with the properties of the material investigated
25
Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
31
Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
35
using infra-red light
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33
Investigating or analysing materials by specific methods not covered by groups G01N1/-G01N31/131
26
Oils; viscous liquids; paints; inks
28
Oils
Applicants:
ASHLAND OIL, INC. [US/US]; P.O. Box 391, BL2 Ashland, KY 41114, US
Inventors:
MAGGARD, Steven, M.; US
WELCH, William, T.; US
Agent:
WILLSON, Richard, C., Jr.; P.O. Box 391, BL2 Ashland, KY 41114 , US
Priority Data:
626,13211.12.1990US
Title (EN) DETERMINATION OF AROMATICS IN HYDROCARBONS BY NEAR INFRARED SPECTROSCOPY
(FR) DETERMINATION DES AROMATIQUES PRESENTS DANS DES HYDROCARBURES A L'AIDE DE LA SPECTROSCOPIE A INFRAROUGE PROCHE
Abstract:
(EN) Mid-distillate hydrocarbon fuels, preferably having initial boiling points above 350 °F, are separated e.g. by prep-HPLC into non-aromatic and aromatic fractions which are used to set 0 % aromatics (the non-aromatics) and 100 % aromatics (the aromatics) on an NIR spectrophotometer. From NIR aromatic band absorbances of unknown samples, their percent aromatics is determined using this two-point calibration and the Beer-Lambert equation. Preferred NIR bands of 1650-1700 and 2120-2256 exhibit excellent correlation with aromatics content.
(FR) On sépare des combustibles hydrocarbures à distillat moyen, dont les points d'ébullition initiaux se situent de préférence à une température supérieure à 350 °F, à l'aide par exemple d'une chromatographie liquide initiale à haute performance produisant des fractions aromatiques et non aromatiques qui sont utilisées pour produire des aromatiques à 0 % (les fractions non aromatiques) et des aromatiques à 100 % (les fractions aromatiques) sur un spectrophotomètre à infrarouge proche. On détermine le pourcentage d'aromatiques présents dans des échantillons inconnus à partir des absorbances des bandes aromatiques dans l'infrarouge proche, en utilisant cet étalonnage à deux données et l'équation de Beer-Lambert. Les bandes préférées 1650-1700 et 2120-2256 dans l'infrarouge proche présentent une excellente corrélation avec le contenu des aromatiques.
Designated States: AT, AU, BB, BG, BR, CA, CH, CS, DE, DK, ES, FI, GB, HU, JP, KP, KR, LK, LU, MC, MG, MN, MW, NL, NO, PL, RO, SD, SE, SU
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)