H. Kirci et al., A NEW MODIFIED PULPING PROCESS ALTERNATIVE TO SULFATE METHOD ALKALI-SULFITE-ANTRAQUINONE-ETHANOL (ASAE), Wood Science and Technology, 28(2), 1994, pp. 89-99
In this study, ASAM method was modified by the use of ethanol instead
of methanol. This new organosolv pulping method is referred to as ASAE
. Brutia pine (Pinus brutia Ten.) was chosen as raw material in cookin
g because of its wide-spread usage in Turkish sulphate mills. 28 cooks
were made by changing the cooking conditions systematically to achiev
e the most effective cooking parameters for yield and physical propert
ies of ASAE pulps. Also, a control sulphate cook was made. After stati
stical evaluations of the data optimum pulping conditions were determi
ned to be 20% Na2SO3 with 50% ethanol ratios and 150 min cooking time
at maximal temperature. It was found that ASAE pulps had higher yield,
viscosity, brightness and strength properties than sulphate control p
ulps with the exception of breaking length. Furthermore bad-odour prob
lems were absent during the blowing and washing process in the laborat
ory trials.