Pulp and Paper
Our industrial gases expertise enables producers of pulp and paper to increase production, lower operating costs, enhance operational safety and comply with stringent environmental regulations. Our oxygen, carbon dioxide, ozone or nitrogen solutions reduce the environmental impact of your pulp and paper operations, and increase the capacity of your chemical recovery operations in a range of applications.
Air Liquide delivers gases to your facilities in bulk, produces oxygen on-site in vacuum swing adsorption (VSA) units or customized FLOXALTM on-site production systems to ensure safe and reliable gas supply. We also install and monitor storage vessels and related equipment.
Environment
- Carbon dioxide for wastewater pH control
- Oxygen for secondary wastewater treatment
- Oxygen for odor control
- Sulfur reduction/avoidance
Pulp and Paper Value Chain Steps
DELIGNIFICATION
Air Liquide provides cost effective solutions to reduce the use of hazardous chemicals.
Oxygen delignification
Used on more than 150 sites worldwide, this process allows you to increase the quality of your pulp, reduce production costs, decrease your bleaching chemical requirements for elements like chlorine dioxide, as well as reduce biochemical oxygen demand (BOD) and chemical oxygen demand (COD).
Gases
Services
We can help you better manage your bulk gas supply through tank-level monitoring using telemetry units and automatic re-ordering.
Polysulfide liquor generation
Polysulfide cooking enables you to increase the pulp yield from 1% to 3% thus increasing your unit productivity. Oxygen is used to convert classic kraft liquor into a polysulfide liquor through controlled oxidation.
Gases
Services
We can help you better manage your bulk gas supply through tank-level monitoring using telemetry units and automatic re-ordering.
CHEMICAL RECOVERY
Air Liquide provides environmentally friendly solutions to recover chemicals from the Kraft pulp process.
Black liquor oxidation
Pure oxygen in adapted reactors can treat black liquors (weak or strong) to reduce emissions of sulfur-containing compounds and calorific capacity.
Gases
Brands
Our FLOXALTM on-site oxygen production systems can be customized to meet your needs, minimize costs, and improve reliability.
Services
Our tank-level monitoring with telemetry units and automatic re-ordering improves control of your bulk gas supply.
Inerting
Inerting involves the addition of nitrogen – an inert gas – to displace oxygen or moisture and prevent unwanted reactions associated with safety and purity concerns.
Gases
Lime kiln boosting
Oxygen will help de-bottleneck an overloaded lime kiln and lower total reduced sulfur (TRS) emissions. We can help you implement this technology with specific audits, customized air enrichment methods or direct injection.
Gases
Services
We can help you manage your bulk gas supply more effectively through tank-level monitoring using telemetry units and automatic re-ordering.
Brands
Our FLOXALTMon-site oxygen production systems can be customized to meet your needs while minimizing costs and improving reliability.
Oxygen enrichment of recovery boilers
Pulp production is limited by recovery boiler capacity. Air Liquide has developed an enrichment technology for combustion oxygen that allows you to safely increase capacity. We conduct system audits as part of our gas offer.
Gases
Services
We can help you better manage your bulk gas supply through tank-level monitoring using telemetry units and automatic re-ordering.
Brands
Our FLOXALTM on-site oxygen production systems can be customized to meet your needs while minimizing costs and improving reliability.
Tall oil neutralization
If your sodium/sulfur balance is high in sulfur, using carbon dioxide to replace some sulfuric acid in your tall oil recovery unit is a solution simply achieved with our Air Liquide patented system operating on several industrial sites.
Gases
Services
We can help you manage your bulk gas supply more effectively through tank-level monitoring using telemetry units and automatic re-ordering.
White liquor oxidation
Oxygen enables you to make high quality oxidized liquor while reducing costs. Air Liquide’s high-performance oxygen dissolution systems can operate very efficiently with lower purity oxygen such as VSA oxygen, off-gas coming from an ozonation process and more.
Gases
Services
We can help you manage your bulk gas supply more efficiently through tank-level monitoring using telemetry units and automatic re-ordering.
UV curing
Nitrogen can be used to displace oxygen from the curing chamber during the UV curing process, resulting in a higher quality of treatment, reduced VOC emissions and lower photoinitiator costs.
Gases
Services
We can help you better manage your bulk gas supply through tank-level monitoring using telemetry units and automatic re-ordering.
Brands
Our FLOXALTM on-site nitrogen production systems can be customized to meet your needs while minimizing costs and improving reliability.
BLEACHING AND WASHING
Air Liquide provides chloride-free solutions for Kraft pulp bleaching.
Neutralization after bleaching
Carbon dioxide can be used to regulate the pH of recycled, mechanical or chemical pulps after an alkaline bleaching, particularly when hydrogen peroxide is used. Advantages compared with traditional acids are ease of use, increased reliable pH control, installation safety and reduction in sulfur containing products.
Gases
Oxidative extraction (Eo)
Eo reduces chlorinated reagents – especially chlorine dioxide – during the bleaching process. Oxygen is often combined with hydrogen peroxide to ensure a greater reduction in chemical uses and resulting organochlorinated products.
Gases
Ozone bleaching (ECF or TCF pulps)
Ozone bleaching efficiently decreases your bleaching costs while reducing emissions. Ozone can be produced from oxygen (liquid oxygen or Vacuum Swing Adsorption) in generators. Our expertise in bleaching steps, recovery and reuse of the oxygen-rich offgas will help you achieve efficiency throughout your operations.
Gases
Services
We can help you better manage your bulk gas supply through tank-level monitoring using telemetry units and automatic re-ordering.
Waste papers treatment with ozone
Ozone can be used to bleach waste papers, decolorize the pulp and reduce the residual fluorescence coming from optical whiteners.
Gases
Services
We can help you better manage your bulk gas supply through tank-level monitoring using telemetry units and automatic re-ordering.
Oxygen for wasterwater treatment
Air Liquide supplies a range of products, equipment and services for water and wastewater treatment for processes like oxygen enrichment and pH control. To explore all of our water treatment offers, visit our Environment page.
Gases
Equipment
Pulp washing
Air Liquide supplies carbon dioxide to control the pH and reduce the loss of chemicals in washing.
Gases
PAPER MACHINES
Air Liquide provides environmentally friendly solutions to recover chemicals from paper processing.
pH balancing in carbon dioxide based paper machines
Easy to implement, carbon dioxide can safely replace acids such as sulfuric acid, alum, or sulfur dioxide in paper machines to enable better pH control and reduce corrosion.
Gases
Services
We can help you better manage your bulk gas supply through tank-level monitoring using telemetry units and automatic re-ordering.
Why Choose Us?
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Industry leader
Air Liquide is a leading global supplier of industrial gases – oxygen, nitrogen and carbon dioxide – essential to pulp and paper manufacturers. -
Water treatment experts
Our industry experts will help you implement wastewater treatment solutions. -
Customizable solutions
Our teams will work with you to identify the most appropriate and cost-effective gas supply mode based on your purity, flow, volume and safety requirements. -
Local support
We will manage all aspects of your gas supply, from ordering to storage and handling. -
Safety and reliability
Air Liquide’s on-site support representatives will help ensure a safe, efficient and reliable supply of gases, so essential to your operations.