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1. WO1996005498 - PROCESS FOR CONTROLLING CONCENTRATION OF A SOLUTION OF A SOLVENT AND POLYMER

Publication Number WO/1996/005498
Publication Date 22.02.1996
International Application No. PCT/US1995/008967
International Filing Date 21.07.1995
Chapter 2 Demand Filed 15.02.1996
IPC
G01J 3/28 2006.01
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
28Investigating the spectrum
G01N 21/35 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
31Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
35using infra-red light
CPC
G01J 3/28
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
28Investigating the spectrum
G01N 21/3577
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
31Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
35using infra-red light
3577for analysing liquids, e.g. polluted water
G01N 21/359
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
31Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
35using infra-red light
359using near infra-red light
Y10T 436/10
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
436Chemistry: analytical and immunological testing
10Composition for standardization, calibration, simulation, stabilization, preparation or preservation; processes of use in preparation for chemical testing
Y10T 436/115831
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
436Chemistry: analytical and immunological testing
11Automated chemical analysis
115831Condition or time responsive
Y10T 436/117497
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
436Chemistry: analytical and immunological testing
11Automated chemical analysis
117497with a continuously flowing sample or carrier stream
Applicants
  • E.I. DU PONT DE NEMOURS AND COMPANY [US/US]; 1007 Market Street Wilmington, DE 19898, US
Inventors
  • MOESSNER, Richard, Crosby; US
Agents
  • TULLOCH, Rebecca, W. ; E.I. du Pont de Nemours and Company Legal Patent Records Center 1007 Market Street Wilmington, DE 19898, US
Priority Data
08/289,55812.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR CONTROLLING CONCENTRATION OF A SOLUTION OF A SOLVENT AND POLYMER
(FR) PROCEDE DE REGULATION DE LA CONCENTRATION D'UNE SOLUTION DE SOLVANT ET DE POLYMERE
Abstract
(EN)
The composition of aramid polymerization process streams can be predicted by the application of near-infrared spectroscopy, within the wavelength range of 600-2500 nm, especially 1100-2500 nm. The method requires establishing a correlation between composition component of interest of samples of a training set and their near-infrared spectra, developing from that correlation a predictive equation, verifying the accuracy of the predictive equation on samples of a validation set, and applying the predictive equation to the determination of the composition of unkown samples. The absorbance may be measured as the absorbance, or as the first, second, third, fourth, or higher derivative of absorbance or by other signal processing techniques. The signal can be used to control a multi-component process by manipulation of process control actuators which have known impacts upon the components to be controlled.
(FR)
Le procédé de la présente invention permet de prévoir la composition d'une suite de processus de polymérisation d'aramide par application spectroscopique dans le proche infrarouge, dans la plage des 600-2500 nm, en l'occurrence, des 110-2500 nm. Le procédé consiste à établir d'abord une corrélation entre, d'une part le composant considéré de la composition, prélevé dans les échantillons d'un ensemble d'essai, et d'autre part les spectres proche infrarouge de ces échantillons, puis à développer une équation prédictive à partir de cette corrélation, à vérifier ensuite l'exactitude de l'équation prédictive sur les échantillons d'un jeu de validation, et enfin à appliquer l'équation prédictive pour déterminer la composition d'échantillons inconnus. L'absorbance peut être mesurée en tant qu'absorbance, ou en tant que dérivée première, seconde, troisième, quatrième, ou supérieure de l'absorbance, ou en employant d'autres techniques de traitement du signal. Le signal peut servir à réguler un processus à plusieurs composants en manipulant des actionneurs de gestion du processus ayant un effet sur les composants à maîtriser.
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