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Dissolving pulping

Valmet has the longest experience and widest scope of technologies in supplying equipment and flexible processes for the production of dissolving pulps for various end products. Our scope of supply includes every process step in a pulp mill starting from handling of incoming wood up to ready-made pulp bales, or rolls, together with the entire chemical recovery and mill wide automation.

Cooking – the key process for high cellulose content

The unique prehydrolysis cooking system offers the most economical way of producing dissolving pulp. The subsequent fiber line with TwinRoll barrier washing guarantees fine tuning of pulp qualities to meet the requirements of end product producers. The use of dissolving wood pulp depends on its purity (cellulose content), which depends mainly on the process. Two basic processes are used to produce dissolving pulp, sulfite, or pre-hydrolysis sulfate based pulping process.


A sustainable star in South Africa

A sustainable star in South Africa

Paper and pulp producer Sappi has been producing high-quality dissolving wood pulp at its Ngodwana mill in South Africa since 2013. Valmet’s unique dissolving fiber line concept resulted in a flexible and sustainable solution.