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Pulping & Bleaching
Econotech assists pulp and paper customers with pilot-scale pulping and bleaching evaluations. Working closely with mills, engineering consultants, and chemical or equipment suppliers, we jointly develop conditions and sequences to optimize productivity and quality.
When considering new implementations or adjustments to existing process, it’s important for mills to confirm the best approach before moving forward. Econotech’s independent pilot studies are a cost-effective way to explore options and find the best solution.
Our pilot plant is versatile, and suitable for investigating most pulping and bleaching scenarios. We’re knowledgeable, and experienced with preparation and processing of softwoods, hardwoods and non-woods such as hemp, grasses, bamboo, wheatstraw and other agricultural residues.
Our knowledge and expertise are often used by:
- Kraft Pulp Mills
- Mechanical Pulp Mills
- Linerboard Mills
- Paper Mills
- Research and Development
- Equipment Suppliers
- Chemical Suppliers
- Engineering Consultants
- Independent Innovators
Capabilities include:
Pulping:
- Evaluate wood chips or other non – wood feedstock for bulk classification properties
- Optimize wood chip thickness, non – wood length and physical pre – treatments
- Evaluate available feedstock for pulp yield and pulp characteristics
- Optimize batch or continuous cooking and/or refining conditions, including for blended furnish and chemical pre-treatments.
- Assess additives for their improvement to pulping process or product quality, ahead of marketing or mill implementation
- Evaluate conditions for recovery of valuable organic materials from spent liquors
- Benchmark analysis and monitoring process changes
- Produce pulp or liquor in quantities for end product application testing or marketing
Bleaching:
- Develop modified bleaching sequences to optimize bleach plants
- Determine the impact of bleach plant modification on chemical consumption, pulp characteristics and effluent properties
- Evaluate Elemental Chlorine Free (ECF) or Total Chlorine Free (TCF) bleaching sequences
- Produce pulp or liquor in quantities for end product application testing or marketing
Would You Like to Talk with an Expert?
Pulping and Bleaching testing capabilities are below or search Find a Test
| Service Area | Test | Test Method |
|---|---|---|
| Bulk Properties | Bark content | TAPPI T265 |
| Bulk Properties | Bark, Rot, and Contaminants | TAPPI T265 |
| Bulk Properties | Basic Density of Wood/Biomass | TAPPI T258, SCAN-CM 43 – Modified |
| Pulping+Bleaching | Bleaching sequence made of Stages | |
| Pulping+Bleaching | Bleaching Stage – Acid Wash (A) | |
| Pulping+Bleaching | Bleaching Stage – Chelation (Q) | |
| Pulping+Bleaching | Bleaching Stage – Chlorine Dioxide (D) | |
| Pulping+Bleaching | Bleaching Stage – Enzyme (X) | |
| Pulping+Bleaching | Bleaching Stage – Extraction (E) | |
| Pulping+Bleaching | Bleaching Stage – Hypochlorite (H) | |
| Pulping+Bleaching | Bleaching Stage – O2 and Peroxide Reinforced Ext (Eop) | |
| Pulping+Bleaching | Bleaching Stage – O2 Delignification (O) | |
| Pulping+Bleaching | Bleaching Stage – Oxygen (O) | |
| Pulping+Bleaching | Bleaching Stage – Oxygen Delignification | |
| Pulping+Bleaching | Bleaching Stage – Oxygen Reinforced Extraction (Eo) | |
| Pulping+Bleaching | Bleaching Stage – Ozone (Z) | |
| Pulping+Bleaching | Bleaching Stage – Peracetic Acid (PAA) | |
| Pulping+Bleaching | Bleaching Stage – Peroxide (P) | |
| Pulping+Bleaching | Bleaching Stage – Peroxide Reinforced Extraction (E(p)) | |
| Pulping+Bleaching | Bleaching Stage – Peroxide with Oxygen (P(o)) | |
| Pulping+Bleaching | Bleaching Stage – Sodium Hydrosulfite (Y) | |
| Pulping+Bleaching | Bleaching Stage – Washer Carry-over | |
| Bulk Properties | Bulk Density | ISO 17828, TAPPI UM23 |
| Pulping+Bleaching | Pulp processing – Box Washing | |
| Pulping+Bleaching | Pulp screening – Flat Screening | |
| Pulping+Bleaching | Pulping – Autoclave Bomb Reactors – Batch | |
| Pulping+Bleaching | Pulping – Digester Sim – Circulating, Batch | |
| Pulping+Bleaching | Pulping – Digester Sim – Circulating, Continuous | |
| Pulping+Bleaching | Pulping – Digester Sim – Impregnation | |
| Pulping+Bleaching | Pulping – Digester Sim – Prehydrolysis | |
| Pulping+Bleaching | Pulping – Digester Sim – Pre-steaming | |
| Pulping+Bleaching | Refining – Chemi-Mechanical Pulping (CMP) | |
| Pulping+Bleaching | Refining – De-shiving high kappa pulp | |
| Pulping+Bleaching | Refining – Disc Refining | |
| Pulping+Bleaching | Refining – Refiner Mechanical Pulping (RMP) | |
| Pulping+Bleaching | Refining – Refining for Wood Chip Brightness | |
| Pulping+Bleaching | Refining – Simulate blowline refining | |
| Bulk Properties | Size classification | Tyler sieve |
| Bulk Properties | Size classification – Round-hole | Williams |
| Bulk Properties | Size classification – Thickness | TAPPI um-21 (Stalsvetz) |