G - Physics – 01 – N
Patent
G - Physics
01
N
73/59
G01N 21/84 (2006.01) D21C 7/12 (2006.01) G01N 21/85 (2006.01)
Patent
CA 1207554
Method and Apparatus for determining cellulose-pulp properties A B S T R A C T A multiplicity of cellulose-pulp properties (for example kappa number) are based on measurement of the weight of the cellulose pulp. Since during the manufacturing process pulp comprises a liquid suspension, it is normally necessary to treat the extracted samples, including a drying stage, prior to weighing the sample and subjecting the same to subsequent analysis. In order not to change the pulp from a chemical and/or physical aspect, the pulp should be dried carefully, which takes a long time. As a result of the invention it is possible to exclude the time-consuming drying and weighing operations, and the invention relates to a method for determi- ning cellulose-pulp properties, in which a sample quantity of pulp is taken and analyzed chemically or physically, characte- rized by the combination of first analyzing the sample and then determining the exact amount of pulp in the analyzed sample which is necessary for calculating the pulp property in question, by causing all of the analyzed sample, or a measured part thereof, in the form of a fibre suspension of low concen- tration to pass an optical measuring means while measuring the fibre content. The invention also relates to apparatus for determining the lignin content of cellulose pulps.
430265
Macrae & Co.
Mo Och Domsjo Aktiebolag
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