Patent ID: 6875756

Claim:
A process for continuous single-stage production of a homogeneous solution of cellulose and optionally additives in water-containing tertiary amine oxides and at temperatures in the range between 50 and 130° C. under reduced pressure by water evaporation, comprising (a) feeding a water-containing cellulose having a water content of between 30 to 60% by mass water into a first section of an evacuated first shearing zone of a mixing/kneading reactor where the water-containing cellulose is, homogenized and heat treated, (b) feeding a preheated water-containing amine oxide into a second section of the first shearing zone of the mixing/kneading reactor and mixing same, with the water-containing cellulose by shearing to homogenized and heating the mixture up with the onset of water evaporation, (c) removing water in a third section of the first shearing zone of the mixing/kneading reactor by kneading, shearing and heat-treating the mixture to complete transformation into a cellulose gel, (d) converting the cellulose gel in a second shearing zone of the mixing/kneading reactor into a homogeneous solution under reduced pressure by cooling, kneading and shearing, (e) separating the homogeneous solution by means of temperature-controlled screw conveyors from an evacuated part of the mixing/kneading reactor, and (f) feeding the separated homogeneous solution to a consumer via pumps and safety filters.