Kinleith and Tasman Mills are both Kraft pulp mills consisting of wood preparation yards, batch and continuous digesters, pulp drying lines and a paper machine (Kinleith).

Kraft pulping is a chemical process that is economically dependent on the manufacture and recovery of chemicals. These are produced from auxiliary units on site.

CHEMICAL PLANT
Chemical plants at each site manufacture chemicals for internal use and excess capacity is sold on the New Zealand domestic market. These chemicals include:

• Liquid Chlorine: Used as a sterilising agent in water treatment stations, commercial swimming pools, and the food industry.
• Sodium Hypochlorite: Used as a sterilising agent in water treatment stations, commercial swimming pools, the food industry and in common household bleach products.
• Hydrochloric Acid: Used in cleaning metals prior to coating, pH correction, and in industrial processes such as casein and glucose syrup production.
• Sodium Chlorate Solution: Used in the manufacture of chlorine dioxide for bleaching wood pulp.
• Chlorine Dioxide: Used for bleaching wood pulp.
• Sodium Sulphate: Saltcake, additive used in Kraft pulping process.

STEAM AND RECOVERY
The Steam and Recovery plant produces four saleable by-products:

• Crude Tall Oil: Refined by customers into high value products that include detergents and dispersants, tackifier resins and dispersions, printing ink resins, protective coatings, rubber tackifiers, emulsifiers and paper size.
• Crude Sulphate Turpentine: Refined by customers into solvents for the printing industry, perfumes for soaps and cleaning products, disinfectants, pine oil and flavourings and synthetic Vitamin E.
• Red Oil: Refined by customers to extract terpenes, with similar use to turpentine.
• Demineralised Water: Used in specialist industrial and domestic applications.

For technical specifications and other queries, please contact: chemicals@chh.co.nz