Granted Patent B2

US 7,562,419 · App. 11/179,301 · Granted Jul 21, 2009

Abstract

Claims (14)

1. A process for purifying raw cotton linters comprising

a) cutting a first, second, third, or mill run cut raw cotton linters torn particle size that passes through a 2,500 micrometer screen, and

b) mechanically separating the cut raw cotton linters into clean and unclean fractions,

whereby the clean fraction contains purified cut raw linters and the unclean fraction contains the impurities, wherein the mechanically separating step (b) is performed by either one or more progressively finer sieves, or an air classifier.

2. The process of claim 1 , wherein the number of progressively finer sieves is two.

3. The process of claim 1 , wherein the number of progressively finer sieves is four.

4. The process of claim 1 , wherein the number of progressively finer sieves is six.

5. The process of claim 1 , wherein the air classifier is controlled using feedback from an online particle size analyzer.

6. The process of claim 1 , wherein the cuffing step (a) produces a particle size that passes through en opening of 2000 micrometer.

7. The process of claim 1 , wherein the cutting step (a) produces a particle size that passes through an opening of 1500 micrometer.

8. The process of claim 1 , wherein the cutting step (a) produces a particle size that passes through an opening of 500 micrometer.

9. The process of claim 1 , wherein the cutting step (a) produces a particle size that passes through an opening of 250 micrometer.

10. The process of claim 1 , wherein the cutting step (a) produces a particle size that passes through an opening of 150 micrometer.

11. The process of claim 1 , wherein the cutting step (a) produces a particle size that passes through an opening of 75 micrometer.

Assignments (13)