six runs were conducted for each concentration of ammonia the results are shown below in table 2 table 2______________________________________ average values kappa viscosity yield brightnessexperiment no cp at 0 5 on od pulp elrepho______________________________________starting pulp 19 1 33 0 26 3control 11 0 23 0 95 3 45 20 3 ammonia 10 5 26 3 96 7 46 80 6 ammonia 11 0 25 7 97 0 46 41 0 ammonia 10 5 26 3 96 7 46 1______________________________________ a pilot plant run was conducted employing 0 6 ammonia in an oxygen alkali system treating hardwood dissolving pulp of a consistency of 3 based on weight of oven dried pulp the pilot plant run was conducted in two parts in one part referred to as 34 conventional 34 the pulp having a consistency of 3 based on oven dried pulp containing 1 8 grams per liter of sodium hydroxide was mixed intimately with elemental oxygen to provide an initial pressure of 100 psig and the pulp was maintained at a temperature of 205 u00b0 f for 10 minutes thereafter the system was vented to 36 psig pressure the pressure was then gradually reduced to zero psig over a period of 42 minutes in the second portion of the pilot plant run conducted under what is referred to as 34 split flow 34 whereby the initial pulp consistency was 4 7 based on oven dried pulp containing 1 2 grams per liter of sodium hydroxide and the pulp.