A bulk amount of unserviceable toxic cresylic acid waste has been disposed off in a safe and environmentally benign manner. A process to immobilize this waste into non-toxic solid cresol formaldehyde polymer has been developed. Initial study was performed for 1.0 Kg batch size for optimizing the process parameters and conditions, and on the basis of this data, process was scaled-up for bulk disposal (100 Kg / batch). The effect of ratio of reactants, type of catalyst [H 2 SO 4 , NaOH and Ca(OH) 2 ], catalyst concentration, reaction temperature and reaction time have been studied in a batch process. Maximum immobilization in the 1.0 Kg batch studies was obtained when cresylic acid and formaldehyde were taken in a molar ratio 1 : 1.5 using NaOH as a catalyst. For bulk polymerization, a ratio of 1.0 : 1.2 (cresylic acid : formaldehyde) with NaOH {0.7 % (wt. / wt. of total charge)} was found optimum. The final polymerized product has been buried as per standard procedure in two brick lined pits and finally, the site has been declared as free from the toxic waste. Defence Science Journal, 2011,?61(5), pp.505-511 ,?DOI:http://dx.doi.org/10.14429/dsj.61.515
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机译：大量无法使用的有毒甲酚酸废料已经以安全和环保的方式处理掉了。已经开发了将这种废物固定为无毒的固体甲酚甲醛聚合物的方法。为了优化工艺参数和条件，针对1.0 Kg批次大小进行了初步研究，并基于此数据扩大了批量处理的过程（100 Kg /批次）。通过分批研究了反应物配比，催化剂类型[H 2 SO 4，NaOH和Ca（OH）2]，催化剂浓度，反应温度和反应时间的影响。当使用NaOH作为催化剂以1：1.5的摩尔比使用甲酚酸和甲醛时，在1.0 Kg批次研究中获得了最大的固定化。对于本体聚合，发现与NaOH的比例为1.0：1.2（甲酚酸：甲醛）{0.7％（wt./总装料的wt。）}是最佳的。按照标准程序，将最终的聚合产品埋入两个衬砌砖的坑中，最后，该厂址宣布为无毒废物。国防科学杂志，2011，61（5），505-511页，DOI：http：//dx.doi.org/10.14429/dsj.61.515
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