Development of dyeing natural textiles in supercritical carbon dioxide

This project developed a supercritical carbon dioxide waterless dyeing process, which makes use of carbon dioxide emitted from industries. Carbon dioxide acts as a medium in the system and dyes textiles in its supercritical state. It is waterless and no chemicals needed in the entire dyeing process. Moreover, the dyestuff and carbon dioxide can be reused, solving the water pollution problems of traditional textile dyeing industry.

Application

Currently, this project is able to apply on the dyeing of natural fibre materials, such as cotton and wool. Through transforming dyestuff, the covalent dye-textile bonds will be created. It is applicable to natural textiles dyeing in supercritical carbon dioxide.

Industry Benefit

Water acts as a medium in traditional dyeing process. The process consumes large amount of water and energy. Its wastewater poses a threat to the environment. Many countries are more concerned about the environment and relevant regulations become more stringent. This dyeing technology can increase the competitiveness of the industry, reduce production costs and waste treatment costs.

For more details, please contact us. (Email: info@hkrita.com; Tel: (852) 2627 0180)