Skip to main content
RISE logo

Viscose pilot plant

To develop and optimise regenerated cellulose, RISE has two viscose pilots, one on a micro-scale and another one for larger volumes of viscose solution. The pilots consist of six parts which together correspond to an actual viscose manufacturing process.

Overview of viscose procedure

Refining the raw material to obtain a greater value is interesting in the production of dissolving cellulose. In the RISE plant for viscose production, all steps from dissolving cellulose to finished viscose solution and spinning of viscose fibres can be simulated.


In the mercerisation step, cellulose is slurried in caustic soda to form alkali cellulose, then the excess of soda is pressed out of the alkali cellulose. During decomposition, the pressed alkali cellulose decomposes to increase the reaction surface. This gives a more even oxygen distribution in subsequent steps and a more even uptake of carbon disulfide during the xanthation process. In the maturation step of the alkali cellulose, the viscosity (Degree of polymerisation) is reduced to a suitable level for further spinning of the viscose dope. After the Xanthation step, dissolution and post-ripening take place, after which the solution, i.e. viscose dope, is ready to be spun into viscose fibres.

Offer in viscose pilot

In the viscose pilot, individual pulps and the suitability of different cellulose mixtures for viscose production can be evaluated. Screening experiments can be performed to investigate the effect of different process parameters on different dissolving celluloses and test how well a cellulose material works at given process settings. In the viscose pilot, it is also possible to evaluate different process chemicals, test different additives for fibre properties and so on.

For more information on spinning of viscose dope, and mechanical analyses of viscose fibres, visit the webpage Spinning pilotViscose fibre characterisation, and analyzes of pulp for dissolving.


Testbed name

Viscose pilot plant

Testbed category

Laboratory testbeds (LT)


Pulp, paper and packaging


Biorefinery, Pulp and paper, Material transition, Textile

Strategic innovation program



Region Västernorrland

Contact person

Nadine Hollinger

Forsknings- och utvecklingsingenjör

+46 10 722 32 22

Read more about Nadine

Contact Nadine
CAPTCHA This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.

* Mandatory By submitting the form, RISE will process your personal data.

Diana Reyes Forsberg

Contact person

Diana Reyes Forsberg

Read more about Diana

Contact Diana
CAPTCHA This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.

* Mandatory By submitting the form, RISE will process your personal data.


Test & demo

Spinning pilot - manufacture thread on a lab scale

Increased population in the world results in increased consumption of textiles. This means that the textile raw material needs to be optimised and its process developed to make them more sustainable so that the consumption of the …

Viscose fiber characterization

Fibre characterisation such as linear density, fibre strength or tenacity and elongation of staple fibres and filaments from viscose show the mechanical properties of the fibre.

Analyzes of pulp for dissolving

To see if a cellulose pulp is suitable for dissolving, it needs to be characterized and tested, which RISE can help you with.

Molecule weight distribution

RISE can characterize pulp, carboxymethylcellulose, polyacrylate, starch, biocides, lignin, black liquor, hemicellulose.

Light microscopy quickly shows small details

With light microscopy, you can quickly get an overview of the problem and all images are displayed in color. It is often used in connection with product development, problem solving and support to end customers. To gain an underst…

Gas chromatography-mass spectrometry identifies many materials

Materials and processes need to identify their products. Using gas chromatography-mass spectrometry facilitates the work and it is often used in connection with problem solving and environmental issues. The instrument is very usef…

Scanning electron microscopy sees surface structure and elements

Processes are often warm and humid that create good environments for bacteria, precipitates and other undesirable phenomena that contribute to disruption and degradation of end products. Scanning electron microscopy (SEM/XDS) has …

Separation of chemical compounds

Separating and purifying various chemical liquids such as cooking liquids, yeast tanks and black liquor is important in traditional forest industry process liquids and materials, as well as in the biorefinery area.