Ultrasound-assisted method for high-yield cellulose extraction from raw rice straw without the need for bleaching step
Ultrasound-assisted method for high-yield cellulose extraction from raw rice straw without the need for bleaching step
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US 12,129,314 B1
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الصحة - Health
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2024
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مكتب البراءات الأمريكي - US Patent Office
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Khan; Gausal Azam (Al Ahsa, SA), Chakraborty; Sankha (Odisha, IN), Tripathy; Suraj K. (Odisha, IN), Banerjee; Shirsendu (Odisha, IN)
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A method of making microcrystalline grade powdered cellulose from rice straw can include obtaining rice straws; drying the rice straws to obtain dried rice straws; cutting the dried rice straws to obtain rice straw pieces; soaking the rice straw pieces in a solvent to obtain a mixture; adding the mixture to an acidic solution to obtain a solution mixture; ultrasonicating the solution mixture to obtain extracted cellulose; separating the extracted cellulose from the solution mixture via filtering to obtain filtered extracted cellulose; adding the filtered extracted cellulose to a solution of sodium hydroxide to obtain a mercerized mixture; stirring while heating the mercerized mixture to obtain mercerized cellulose; separating the mercerized cellulose from the mercerized mixture via filtering to obtain filtered mercerized cellulose; and drying the filtered mercerized cellulose to obtain microcrystalline grade powdered cellulose.