Low temperature exothermic reaction of Reillex™ HPQ in nitric acid

被引：6
作者：
Crooks, WJ [1 ]
Kyser, EA [1 ]
Walter, SR [1 ]
机构：
[1] Westinghouse Savannah River Co, Aiken, SC 29808 USA
来源：
SOLVENT EXTRACTION AND ION EXCHANGE | 2002年 / 20卷 / 4-5期
关键词：
D O I：
10.1081/SEI-120014371
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Despite reports of the relative inertness of Reillex(TM) HPQ to chemical and radiolytic degradation, thermal stability studies in nitric acid solutions identified a low temperature exothermic reaction using the Reactive System Screening Tool (RSST). Comparative data for Reillex(TM) HPQ and Ionac(TM) A-641 both show runaway behavior in nitric acid above 130degreesC, but only Reillex(TM) HPQ had a low temperature exotherm that initiated at about 69degreesC. While this exotherm is small in magnitude, gaseous products were identified, leading to concerns of pressurization within the ion exchange column. This work identifies and characterizes the low temperature exothermic reaction of Reillex(TM) HPQ in nitric acid, identifies ethylbenzene pendant groups as the origin of this reaction, and proposes a chemical pretreatment to eliminate it.
引用
收藏
页码：543 / 559
页数：17
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