Xylanase, Liquid

Xylio® Pre

Xylio® Pre improves the bleachability of your chemical pulps by remaining active at high temperature and pH. It can tolerate harsh pre-bleaching conditions with little to no adjustment to your operation.  With Xylio® Pre, you can hit brightness targets while saving on bleaching chemicals. 

 
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Key Benefits Description
  • Designed for pre-bleaching

    Under most conditions, this product is suitable for use in pre-bleaching.

  • Suitable for post-bleaching

    Under moderate conditions, this product may be suitable for use in post-bleaching. 

  • Temperature and pH tolerant

    This product withstands the high temperature and pH of pulp prior to bleaching. 

  • Savings in bleaching chemicals

    With this product, you can reach final brightness targets while reducing use of bleaching chemicals. These include chlorine dioxide, hydrogen peroxide and caustic soda

  • Increased brightness & stability

    With this product, you can achieve higher final brightness levels and improved optical stability. All while maintaining your current bleaching chemical inputs.

  • Reduced AOX and OX

    This product allows you to decrease chlorine dioxide in ECF bleaching. That means lower adsorbable organic halogen (AOX) levels in your effluents. That helps your mill stay in compliance. It also reduces organic halogens (OX) in your final products to improve their quality profile. Reducing bound halogens improves your overall sustainability profile.

  • Energy savings and process benefits

    Xylans contribute to the water-binding capacity of pulp fiber. By selective action on xylan at the fiber surface, this product may promote release of bound water. That improves the dewaterability of your pulp. You can use this benefit to save energy in drying and increase machine speeds.  

  • Higher bleaching capacity

    Bleaching capacity can be limited by bottlenecks in chlorine dioxide production. By improving pulp bleachability, this product allows you to bleach more tons with the same chlorine dioxide volumes. By allowing you to do more with less, this product can help boost the output of your bleach plant. 

  • Lower CAPEX and OPEX in pre-bleaching

    Oxygen, extended delignification or acid stages in pre-bleaching require significant capital expenditure. They may also require operational expenditure. This product is a low-cost option to replace or supplement these processes.

  • A safer working environment

    This product may allow you to reduce the use of certain harsh chemicals. That could potentially improve the working environment of your mill. 

Xylio® Pre improves pulp bleachability so you can achieve higher brightness and optical stability. That means you may be able to produce premium quality products without increasing chemical inputs.  

Xylanase pre-bleaching

Xylanase pre-bleaching

Find out how just a small investment of your time in the lab can demonstrate some big benefits. 

How xylanases deliver higher brightness in paper and board pulp with lower bleaching chemical levels

Bleaching chemicals have high operational costs and environmental impacts. Using xylanases on unbleached fiber is a sustainable way to make them more effective.

Residual lignin in unbleached chemical pulp gives it a dark brown color. To meet the high brightness and whiteness required in many grades of paper and board, mills must bleach the pulp. The most common bleaching chemicals include chlorine dioxide, hydrogen peroxide and caustic soda. These agents penetrate into the fiber wall to fragment, decolor and release entrapped lignin.

Xylanase action on the outer surfaces of unbleached chemical fiber opens the wall. That improves the penetration of bleaching agents as well as the diffusion of lignin from the fiber wall. Controlled hydrolysis of xylan at the fiber surface can also reduce the concentration of hexenuronic acid in unbleached pulp. This lowers wasteful consumption of bleaching chemical across the bleach line.  Also, xylanase action can liberate lignin by disrupting lignin carbohydrate complexes. These are just some of the mechanisms that provide the foundation of enzymatic bleach boosting.

Bleach boosting significantly reduces the need for chemicals in the bleach plant. In elemental chlorine-free (ECF) bleach lines, reducing chlorine dioxide lowers mill effluent toxicity. That's how xylanases help finished pulps get the right level of brightness. All with less bleaching chemistry and a lower environmental impact.

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