Upcycled cellulosic fibers
AssigneeGrasim Industries Limited
InventorsSharad Pandharinath Pawar, Ratnesh Uday Khanolkar, Rupesh Arun Khare, Kamlesh Jamnadas Singala, Saurabh Chandrabhan Singh, Vivek Prabhakar Khare
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Abstract
Cellulosic material for the production of regenerated cellulosic fiber is disclosed. The cellulosic material comprises reclaimed cellulosic material, wherein the reclaimed cellulosic material is obtained from cellulosic material waste and has an intrinsic viscosity in a range of 170 ml/g to 280 ml/g. A process for preparing reclaimed cellulosic material for the production of regenerated cellulosic fiber is also disclosed.
Claims17
Cellulosic material for the production of regenerated cellulosic fiber, comprising reclaimed cellulosic material, wherein the reclaimed cellulosic material is obtained from cellulosic material waste and has an intrinsic viscosity in a range of 170 ml/g to 280 ml/g.
A process for preparing reclaimed cellulosic material for the production of regenerated cellulosic fiber, comprising the steps of:
- a. shredding cellulosic material waste;
- b. treating the shredded cellulosic material waste with a solution of at least one bleaching compound to reduce the degree of polymerisation of the cellulosic material waste in an aqueous solution to an intrinsic viscosity between 170 ml/g to 280 ml/g to obtain a bleached cellulosic material waste;
- and
- c. washing the bleached reclaimed cellulosic material with water to obtain reclaimed cellulosic fiber.
Dependencies are inferred from the claim text.