CSA ISO 22206:26

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CSA Preface This is the first edition of CSA ISO 22206, Kraft lignin — Glass transition temperature by differential scanning calorimetry , which is an adoption without modification of the identically titled ISO (International Organization for Standardization) Standard 22206 (first edition, 2024-09). It replaces CSA W206:20, Kraft lignin — Glass transition temperature by differential scanning calorimetry. For brevity, this Standard will be referred to as "CSA ISO 22206" throughout. This Standard was reviewed for Canadian adoption by the CSA Technical Committee on Lignin, under the jurisdiction of the CSA Strategic Steering Committee on Natural Resources, and has been formally approved by the Technical Committee. This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. Scope This document describes a method for the determination of the glass transition temperature (Tg) of kraft lignin. The procedure utilizes differential scanning calorimetry (DSC). This procedure is applicable to solid lignins (e.g., powdered form) isolated using different isolation techniques (e.g., acidification with hydrochloric acid, sulfuric acid, etc., and carbonation using gaseous carbon dioxide) from the spent liquor (black liquor) generated from the kraft pulping process. It does not apply to raw black liquor and lignin in the alkali form, (lignin that is separated from wood chips and dissolved in sodium sulfide and sodium hydroxide liquor such as that originating from black liquor).