Availability of lignin in the kraft black liquor

In this study, paper clay and test papers were produced from Sarıçam (Pinus sylvestris L.) and Sulfate Poplar Titrek kavak (Populus tremula L.) wood by Sulfate (Kraft) method. Literature research was carried out to determine the chip/solution ratio at 1/4, the cooking temperature at 170 ± 2°C, the maximum temperature reaching time at 90 and 75 min. (Kraft) method, the ratio of active alkali / sulphide was 18/25. The black solution (liquor) which was opened after the Kraft method paper clay production was taken and 3 kinds of residue samples obtained by the experiment were analyzed by FTIR Spectroscopy. When the analysis results are examined, according to the literature sources, ıt has been found that there are positive similarities on the yellow pollen as compared to the shaky poplar example. Key Words Pinus sylvestris; Populus tremula; Kraft paper pulp production; Black solution; FTIR Spectroscopy.