Fenton's reaction : a simple and versatile method to structurally modify commercial lignosulphonates

• Treatment of lignosulphonates with hydrogen peroxide and Fe (II) acetate under mild conditions can be used to increase the molecular weight and content of carboxylic acids. Such Fenton's oxidation can produce, in some of the conditions of and lignosulphonate concentration, a two-fold increase in the molecular weight and a 6-7 fold increase in the carboxylic acid content. The structural modifications of lignosulphonate may increase the technical performance of the product in several applications. Possible reaction mechanisms of the Fenton system are proposed and discussed.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)

Keyword

Lignosulphonate

Fenton's reagent

Molecular weight increase

Carboxylic groups

Phenolic groups

Structural modifications

Reaction mechanism

Hydrogen peroxide

Cellulose and paper engineering

Cellulosa- och pappersteknik

Publication and Content Type

ref (subject category)

art (subject category)