PRODUCING SODA PULP FROM ASPEN, 
Table 13. — Caustic soda consumed during cooking. 
53 
NaOH 
NaOH 
consumed 
consumed 
Cook 
No. 
Causticity 
Efficiency 
per 100 
per 100 
Kind of test. 
of black 
in the use 
pounds of 
pounds of 
liquors. 
ofNaOH. 
wood 
unbleached 
(bone-dry 
pulp (bone- 
basis). 
dry basis). 
Per cent. 
Per cent. 
Pounds. 
Pounds. 
Preliminary 
1 
2 
13.4 
86.2 
23.1 
45.9 
3 
2.2 
97.8 
26.2 
53.2 
Group I 
4 
22.3 
77.0 
30.6 
65.9 

21.4 
77.9 
27.3 
54.6 
6 
14.3 
85.3 
25.6 
57.4 
7 
15.3 
84.2 
18.9 
36.0 
8 
17.2 
82.1 
16.4 
29.5 
9 
2.8 
97.1 
14.6 
32.3 
10 
ill 
12 
4.7 
95.0 
23.7 
47 1 
4.6 
95.4 
23.9 
46.2 
13 
3.4 
96.5 
24.1 
46.0 
14 
10.2 
89.6 
22.3 
41.6 
15 
18.0 
80.7 
20.3 
36.8 
16 
25.5 
74.0 
18.5 
47.3 
Group III *..... 
17 
5.7 
94.2 
23.6 
48.4 
18 
4.7 
95.2 
23.8 
47.6 
19 
14.4 
85.2 
21.3 
40.6 
20 
20.1 
79.3 
19.8 
36.1 
21 
27.1 
72.1 
18.0 
32.9 
22 
26.0 
73.2 
18.3 
31.7 
Group IV 
23 
24 
19.4 
18.1 
80.2 
81.5 
20.1 
20.4 
40 9 
39.5 
25 
17.8 
81.8 
20.5 
40.4 
26 
10.3 
89.5 
22.4 
41.9 
1 Cook spoiled, due to defect in apparatus. 
Wood, soda ash, and bleach employed per 2,000-pound ton of air-dry pulp 
Table 34. 
(10 per cent moisture) based on experimental results. 
Cook 
No. 
Unbleached pulp. 
Bleached pulp. 
Kind of test. 
Wood. 
Soda ash 
(58 per 
cent 
Na 2 0). 
Wood. 
Soda ash 
(58 per 
cent 
Na 2 0). 
Bleaching 
powder 
(35 per 
cent 
available 
chlorine). 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
»11 
12 
13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
23 
24 
25 
26 
Solid 
cords. 
1.41 
1.34 
1.37 
1.45 
1.35 
1.51 
1.28 
1.22 
1.49 
1.34 
Pounds. 
1,853 
1,308 
1,367 
2,117 
1,738 
1,661 
1,057 
901 
828 
1,259 
Solid 
cords. 
1.42 
1.36 
1.38 
1.46 
1.36 
1.52 
1.30 
1.23 
1.52 
1.34 
Pounds. 
1,872 
1,322 
1,384 
2,126 
1,757 
1,681 
1,074 
912 
844 
1,259 
Pounds. 
145.5 
145.6 
136.5 
108.4 
Group IT 
127.4 
136.5 
164.6 
255.6 
532.5 
144. 3 
G roup III 
1.31 
1.28 
1.26 
1.22 
1.72 
1.38 
1.35 
1.28 
1.22 
1.23 
1.17 
1.38 
1.31 
1.33 
1.26 
1,191 
1,172 
1,145 
1,177 
1,571 
1,258 
1,235 
1,178 
1,126 
1,128 
1,071 
1,254 
1,191 
1,214 
1,149 
1.31 
1.31 
1.28 
1.26 
1.80 
1.41 
1.37 
1.31 
1.24 
1.25 
1.20 
1.39 
1.32 
1.35 
1.28 
1,196 
1,196 
1,167 
1,211 
1,642 
1,276 
1,254 
1,196 
1,137 
1,148 
1,101 
1,276 
1,199 
1,232 
1,160 
181.2 
174.7 
192.7 
278.1 
432.3 
127.8 
Group IV 
146.2 
164.7 
182.1 
201.2 
351.2 
155.7 
162.9 
173.5 
200.0 
i Cook spoiled, due to defect in apparatus. 
