Global Patent Index - EP 1254363 A1

EP 1254363 A1 2002-11-06 - DETERMINATION OF THE PROPERTIES OF A SOLUTION OR SOLID USING RAMAN RATIOS

Title (en)

DETERMINATION OF THE PROPERTIES OF A SOLUTION OR SOLID USING RAMAN RATIOS

Title (de)

BESTIMMUNG DER EIGENSCHAFTEN EINER LÖSUNG ODER EINES FESTSTOFFES UNTER VERWENDUNG VON RAMAN-VERHÄLTNISSEN

Title (fr)

DETERMINATION DES PROPRIETES D'UNE SOLUTION OU D'UN SOLIDE PAR L'APPLICATION DES RAPPORTS RAMAN

Publication

EP 1254363 A1 (EN)

Application

EP 01903539 A

Priority

  • CA 0100123 W
  • US 49945000 A

Abstract (en)

[origin: WO0159437A1] The invention relates to the use of ratios of Raman peak intensities to predict the properties of a solution or a solid such as pulp that is processed with the solution. The intensity of the Raman shifted light is used to create Raman peak intensity ratios. These Raman intensities are related to the concentration of species dissolved in the liquid. The Raman spectra are baseline corrected and the scattering from a water reference is subtracted before extraction of intensities for Raman peak intensity ratios. The Raman scattering intensities provide a good measure of the concentration of small, oxygenated molecules. The potential of an oxidative reductive process is conveniently determined using Raman peak intensity ratios. The method may also be used to determine a property related to the relative size, degree of polymerization, branching or network formation of complexing or polymerized species, or to measure large molecules such as hemicellulose, extractives and pectic substances.

IPC 1-7 (main, further and additional classification)

G01N 21/65; D21C 7/12

IPC 8 full level (invention and additional information)

D21C 7/12 (2006.01); G01N 21/65 (2006.01)

CPC (invention and additional information)

G01N 33/343 (2013.01); D21C 7/12 (2013.01); G01N 21/65 (2013.01)

Citation (search report)

See references of WO 0159437A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

EPO simple patent family

WO 0159437 A1 20010816; BR 0108300 A 20030311; CA 2403008 A1 20010205; CA 2403008 C 20111101; EP 1254363 A1 20021106; NO 20023720 A 20021007; NO 20023720 D0 20020806

INPADOC legal status


2006-10-11 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20060419

2002-11-06 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020809

2002-11-06 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR