PRODUCING SODA PULP PROM 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 





4 



22.3 



77.0 



30.6 



65.9 



54.6 





5 



21.4 



77.9 



27.3 





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 







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 



19.4 



80.2 



20 1 



40.9 

 39.5 





24 



18.1 



81.5 



20.4 





25 



17.8 



81.8 



20.5 



40.4 



1 



26 



10.3 



89.5 



22.4 



41.9 



1 Cook spoiled, due to defect in apparatus. 



Table ]4. — Wood, soda ash, and bleach employed per 2,000-pound ton of air-dry pulp 

 (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 



Ul 



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. 



Group I 



145.6 

 136.5 



108 4 





127.4 

 136.5 

 164.6 

 255.6 

 532.5 



144 3 







Group 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 



1 Cook spoiled, due to defect in apparatus. 



