Services
Consultancy Diagnosis

Extraction of molecules and production of unbleached and bleached chemical pulps

Natural molecules, fibres, pilots

  • To extract molecules from lignocellulosic materials (hemicelluloses, lignin, extractives, etc.)
  • To produce unbleached and bleached chemical pulps (from 50 g to 100 kg):
       * Simulation of all the chemical pulping processes (kraft, NaOH, Lo Solids, sulphite, DES, etc.)
       * Reproduction of all the bleaching stages (0, A, P, X, Z, D, E, FAS, Y, etc.)

Generate Value...

Since many years, CTP helps the pulp producers not only to optimise their processes for pulping and bleaching lignocellulosic materials (raw materials mixture, pulp quality improvement, scale deposits reduction, environmental impact decrease, production costs decrease), but also to increase their benefits (molecules extraction from wood: lignin, hemicelluloses, extractives (polyphenols, tanins)).

CTP proposes to carry out laboratory and pilot experiments allowing treating some grams to hundred kilograms of raw materials.

The extraction/cooking and bleaching pilot plants have been used to validate the laboratory results, before carry out expensive industrial trials for more than thirty mills in different countries.


Pilote  d’Extraction  de  molécule  et  de  production  de  pâte  chimique écrue

Molecules extraction and unbleached chemical pulp producing pilot

Context and performance

These laboratory and pilot facilities, unique in Europe, allow extracting molecules from lignocellulosic materials in great quantity but also producing unbleached and bleached fibres. From your raw materials and your industrial conditions, these facilities allow evaluating the impact of operating conditions, the use of other fibrous resources on the quality of fibres and the process effluents.

Pilote de blanchiment

Bleaching pilot

Content of services

Depending on the objective of the study, CTP can evaluate:

  • Different raw materials (hardwoods, softwoods, eucalyptus, annual plants, deinked pulps)
  • Different conditions of extraction of molecules (acidic, alkaline, neutral, enzymatic…)
  • Different processes of production of chemical pulps (kraft, NaOH, Lo Solids, sulphite, DES…)
  • Different bleaching sequences or bleaching stages (O, A, D, P, Po, Z, Y, FAS, X, E, Eop, Ep…)
  • Different conditions (consistency, chemicals charges, temperature, time…)
  • Refining ability of fibres
  • Fibres quality (optical and mechanical properties, morphological characteristics…)
  • Effluents quality (COD, recalcitrant COD, BOD5, COT…)
  • Chemical composition of fibres (polysaccharides, lignin, extractives…)
  • Accelerated ageing by UV irradiation (Suntest)
Pilote de raffinage

Low consistency refining pilot

Deliverables

CTP will supply a study report indicating the influence of the different studied conditions and proposing some recommendations with evaluation of potential savings.


Also to be seen