Delignification (A)/Prebleaching (B)

Processing conds.

Partial yield

Total yield

Raw cellulose color

Date

Sample

Initial mass (g)

Final mass (g)

Aqueous solutions utilized

S/L/˚C/h

(%)

rounded (%)

Sep 18, 2017

SCB48*

8.046

4.2556

5% NaOH (A)

1:40/90-100/12

52.89

52.89

greyish-white

Dec 12, 2017

SCB48**

2.0500

1.3829

20% NaOH/0.75% AQ (A)

1:50/90-100/6

67.46

53.94

earthy yellow

Jan16, 2018

SCB48

1.3829

1.1058

1.35% NaOH/3.94% GAA/1.7% NaClO₂ (B)

1:50/90-100/4

79.96

Jan 9, 2018

SCB48sox**

4.0261

1.7226

20% NaOH (A)

1:50/90-100/6

42.78

33.92

earthy yellow

Feb 6, 2018

SCB48sox

1.7226

1.3655

4.5% GAA/4.28% NaClO₂ (B)

1:50/ca. 80/12

79.27

Mar 19, 2018

SCB48sox**

4.0873

3.1747

1.6% NaOH (A)

1:50/90-100/6

77.67

33.27

slight pink

Apr 2, 2018

SCB48sox

3.1747

1.3599

1.16% NaOH/3.38% GAA/0.43% NaClO₂ (B)

1:50/ca. 80/4

42.83

Apr 14, 2018

SCB24*****

15.0000

6.2513

4% NaOH (A)

1:40/90-100/6

41.67

33.7

greyish-rose

SCB24

6.2513

6.0997

1.35% NaOH/3.94% GAA/1.7% NaClO₂ (B)

1:40/ca.80/3

97.57

May 8, 2018

SCB24

6.0997

5.6207

5% KOH (B)

1:40/90-100/3

92.14

May 15, 2018

SCB24

5.6207

5.1200

2.5% NaOH/11.6% H₂O₂ (B)

1:40/ca. 55/2

89.93

SCB24

5.1200

5.0546

2.5% KOH (B)

1:40/90-100/2

98.72