Method for suspending and introducing solid matter in a...

D - Textiles – Paper – 06 – B

Patent

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D06B 23/20 (2006.01) D06P 1/94 (2006.01)

Patent

CA 2559316

The invention relates to a method for suspending and introducing solid matter in a high-pressure process, for example colorant pigments in a high-pressure process, in which a supercritical fluid is used as the process medium and a pressure in excess of 150 bar prevails. According to the invention, the suspension of the solid matter takes place at a low-pressure in a completely separate suspension method. In the latter, the solid matter is suspended or partially dissolved in a non-critical, liquid gas. The pressure in said suspension method is less than 90 % of the critical pressure of the liquid gas. The suspension is introduced into the high-pressure process by means of a pump.

La présente invention concerne un procédé pour mettre en suspension et introduire une substance solide dans un processus haute pression, par exemple des pigments colorés dans un processus haute pression dans lequel un liquide surcritique est utilisé comme substance de processus et une pression de plus de 150 bar règne. Selon l'invention, la mise en suspension de la substance solide est réalisée à basse pression au moyen d'un procédé de mise en suspension complètement séparé. Dans le cadre de ce procédé de mise en suspension, la substance solide est mise en suspension ou partiellement dissoute dans un gaz non critique liquéfié. La pression au cours de la mise en oeuvre de ce procédé vaut moins de 90 % de la pression critique du gaz liquéfié. L'introduction de la suspension dans le processus haute pression s'effectue au moyen d'une pompe.

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