• PULP & PAPER products
  • Pulp production
  • Kraft pulp
  • A-Recovery+
  • Chemical recovery solutions

A-Recovery+ chemical recovery solutions for kraft mills

See the chemical recovery cycle in a new light

The goal in a kraft mill is always to operate the chemical recovery systems as efficiently and environmentally soundly as possible while minimizing expensive capital investments.

ANDRITZ was inspired to take a fresh look at how to achieve this goal given that, over the years, many of the chemical “loops” have been closed to reduce emissions and effluents. 

These loop closures have often been accompanied by build-ups of certain chemicals and the creation of side-streams and waste-streams that are either ignored or disposed of. Some of these side-streams represent an opportunity to generate revenue, as they contain potentially valuable raw materials for commercial-grade bioproducts if they are processed.

These challenges set the stage for innovation – and ANDRITZ took the lead by shining a new light on the chemical cycle. The result is a technical solution called A-Recovery+ chemical recovery solutions. A tailored chemical recovery system that optimizes chemical balances in a mill to increase its ability to generate additional revenue and to avoid the cost of certain purchased make-up chemicals.

A-Recovery+ chemical recovery solution generates economic value from the side-streams in kraft pulping by:

  • Purifying raw methanol to commercial quality bio-methanol
  • Producing commercial quality sulfuric acid on-site from concentrated non-condensable gases
  • Recovering high-quality lignin from black liquor

Pulp process standard

Pulp process with A-Recovery+ chemical recovery solution

Benefits of A-Recovery+ chemical recovery solutions:

  • Environmental and economic savings
  • Further closure of chemical recovery loops
  • Management and control of Na/S balance
  • Generation of key chemicals avoids purchased costs
  • Additional opportunities for revenue generation
  • Removes obstacles to fossil free operation

On-site production of sulfuric acid in kraft mills with A-Recovery+

A-Recovery+ chemical recovery solutions.

Read more

Lignin recovery in kraft mills with A-Recovery+ chemical recovery solution

Recovering high-quality lignin from black liquor.

Read more

Kraft pulp

Complete production lines or individual components for pulp mills.

Read more

HERB recovery boilers

The recovery boiler plays a central role in the chemical cycle of a modern kraft pulp mill and generates energy for the mill.

Read more
Tammasaarenkatu 1
FI-00180  Helsinki
Get in contact
  • A-Recovery+ chemical recovery solution

    A-Recovery+ recovery solutions

    PDF : 1.4 MB