ft—3l

Table 11.—Laboratory Sulphite Pulping Tests: Yields and Cooking Data.

37

Acid Composition. Time tQ Yield of Pulp (Oven-dry).. Bleach Cook Suedes i < Acid — 1 Cook- Time to j Maximum Maximum : = r— - based on Remarks No - SPeCie3 ' olwfod. Total Free Combined "°° °- ~ Total Screened Screen- per * 6marks - S0 2 . ; S0 2 . SOo. I ture ' Pulp. ! Pulp. ings. Lent ' Br ' | lb. ! Gal. | Per Cent. \ Per Cent. Per Cent. Hours. | Hours. I>eg. C. i Hours, lb./sq. in. Per Cent. Per Cent. : Per Cent, i Per Cent. 3256-1 Bimu .. .. .. 86-6 50 5-60 4-30 1-30 9-5 2 148 9 75 48-1 46-7 1-4 30 3257-1 „ .. .. .. ! 76-8 50 5-63 4-29 1-34 100 2 148 9 75 47-7 46-3 1-4 22 3258-1 „ .. .. .. j 78 2 50 5-65 4-31 1-34 9-25 2 153 9 75 48-35 47-0 1-35 28 3280-1 „ .. .. .. ! 86-8 j 52 5-60 415 1-45 10-5 I 2 148 9 75 48 1 46-6 1-5 24-26 3284-1 „ .. .. 91-4 I 52 5-50 4-10 1-40 10-5 2 148 9 75 48-4 46-7 1-7 3259-1 ; Insignis Pine .. .. | 68-7 i 50 5-57 4-37 1-20 8-5 1-5 148 8-5 75 47-7 46-5 1-2 15 3260-1 I „ .. ..I 75-7 I 50 5-50 4-27 1-23 8-5 1-5 148 8-5 75 52-9 51-3 1-6 28 3263-1 | „ .. .. j 72-2 I 50 5-50 4-29 1-21 9-0 1-5 148 8-5 75 47-5 46-6 0-9 .. Cook burned. 3264-1 { „ .. .. ! 70-0 | 50 5-60 4-36 ! 1-24 9-25 1-5 148 8-5 75 49-4 48-6 0-8 12 3265-1 „ .. .. 70-4 50 5-65 4-37 1-28 8-25 1-5 153 8-25 80 43-5 42-3 1-2 10-12 3266-1 „ .. .. 71-9 50 5-50 4-18 1-32 9-5 1-5 140 7-0 75 49-4 48-4 1-0 12 3267-1 „ .. ; 73-2 54 5-60 4-30 ' 1-30 21-0 5-0 127 21-0 65 48-2 47-6 0-6 11-12 3269-1 „ .. .. | 74-1 i 50 j 5-42 4-10 1-32 ; 8-75 1-5 148 i 8-5 75 44-7 44-3 0-4 15 3272-1 .. .. 71-7 52 5-60 4-15 1-45 9-5 min. 1-5 148 I 8-5 75 46-1 45-2 0-9 12-13 3275-1 „ .. .. 65-2 52 5-50 4-13 1-37 9-5 1-5 148 8-5 75 49-5 48-2 1-3 10 11 3281-1 „ .. .. 67-6 j 52 5-50 4-06 | 1-44 9-5 1-5 148 j 8-5 75 51-75 50-0 1-75 20 3283-1 „ .. : 62-4 ! 52 5-65 4-25 1-40 9-20min. 1-5 148 8-5 75 47-3 46-1 1-2 3261-1 Tawa .. .. .. i 82-4 j 50 6-00 4-70 1-30 10-0 2 148 ; 9-0 75 49-2 48-3 0-9 12 3262-1 „ .. .. .. 80-4 50 6-00 4-78 1-22 11-0 2 148 9-0 75 47-3 46-6 0-7 10 3268-1 ! „ .. .. 82-4 50 6-10 4-82 1-28 10-5 2 148 9-0 75 48-5 47-6 0-9 10 3270-1 „ .. .. .. 81-0 52 5-95 4-53 1-42 11-0 2 148 9-0 75 47-5 46-5 1-0 10-12 3271-1 j „ .. .. j 81-0 | 50 5-85 4-33 1-52 6-0 1-5 140 4-0 75 52-5 49-3 3-2 25 3273-1 | „ .. .. 82-2 : 50 5-75 4-23 1-52 7-0 1-5 140 50 75 52-5 50-0 2-5 25 3274-1 j „ .. .. 78-7 50 5-50 4-00 1-50 7-0 1-5 140 5-0 75 52-0 48-0 4-0 25 3276-1 j .. .. ; 79-9 32 6-00 4-69 1-31 9-0 2 148 9 0 75 49-4 48-0 1-4 16 Yield estimated due to toss of pulp from blow-pit. 3277-1 22 per cent, insignis pine, ; 80-3 52 5-90 4-56 1-34 9-0 2 148 9-0 75 49-4 48-3 1 1 16 78 per cent, tawa 3279-1 f Tawa .. .. .. 80-2 ! 52 6-10 4-80 1-30 9-0 2 148 9-0 75 50-7 49-3 1-4 16 3282-1 „ .. .. .. 86-85 1 52 6-00 4-65 1-35 9-0 2 148 9-0 75 50-4 49-2 1-2 16 3278-1 European larch .. .. 77-8 ' 52 5-70 4-35 1-35 9-75 2 148 9 0 75 45-0 40-3 4-7 21-22 555 Western larch .. .. .. ,. . .. .. .. .. ., .. .. 40-6 36-8 3-8 18 Bulletin No. 1485, U.S. Dept. Agriculture. 3130-1 White-spruce .. .. 80-0 45 5-50 4-30 1-20 I 8-5 1-5 148 j 8-5 75 50-2 48 2 2-0 22 Typical spruce - newsprint sulphite. 3171-1 - Aspen.. .. .. 80-0 47 6-00 4-80 1-20 10 0 2 148 j 9-0 75 51-3 50-3 1-0 8 1 3167-1 Bitch .. .. .. 80-0 47 6-00 4-70 ; 1-30 10 0 I 2 148 9-0 75 46-7 45-5 1-2 18 data. 3176-1 Maple .. .. .. 80-0 47 6-00 4 70 ! 1-30 10-0 i 2 148 9-0 75 47-6 46-2 1-4 29 J I I 1 I ' '