亜硫酸パルプ廃液鞣剤化の研究-3-

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The influence of blending of two different kinds of tanning extracts on the dispersion of tannin particles in blended tan liquor was studied by means of fractional salting out method. We also examined the fractional salting out of unblended single tan liquor and observed the changes of ratio of both components of precipitated fractions by fractional Salting out of blended liquor applylng our bichromate-oxidatiou method of tannin estimation.The obtained results are summerized as follows:1 In The case of single tan liquor, the amount of tan whieh was precipitated by fractional salting out increased with decreasing pH value.2 The chestunt-sulfite cellulose blended liquor adjusted its pH value to 4.0 and sulfite cellulosemangrove liquor adjusted pH to 4.1 showed the remarkable increase of Iyophobic fraction, or the lowering of the degree of dispersion and chestnutmangrove liquor adjusted pH to 4.4 did not show so remarkable increase but in this case pH was higher than the original pH 3.5. Generally speaking, lyophobic fractions were increased by blending, especially sulfite cellulose blending.3 The ratios of tan amount of both components fractionally salted out, were observed te be indefinite or unproportional
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