The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 17, 2004
Filed:
Mar. 15, 2002
Anders Tor Jörgen Engström, Knivsta, SE;
Anna Tigerström, Stockholm, SE;
AGA Aktiebolag, Lidingo, SE;
Abstract
The invention refers to a method for an integrated treatment of cellulose pulp. The method includes the steps: providing said cellulose pulp ( ), providing a determined quantity of white liquor ( ) including alkali and sulphur components, providing an oxygen-containing gas, oxidizing ( ) the sulphur components of the white liquor by the supply of a part of said gas in such a way that at least a part of the sulphur is present in the form of sulphate, transporting the cellulose pulp having a certain kappa number to at least one mixing device ( ), and supplying the oxidized white liquor from the oxidizing step to the cellulose pulp, supplying a part of said gas to the cellulose pulp in said mixing device, mixing the cellulose pulp with the oxidized white liquor and said gas in said mixing device, and transporting the cellulose pulp from said mixing device to a delignification reactor ( ) for oxygen delignification of said cellulose pulp, wherein the kappa number is reduced.