摘要
模拟H2O2氧化丙烯的环氧化产物,利用正交实验方法得到了测定H2O2质量分数的最佳滴定条件.结果表明,滴定时被测样品质量对测定结果的影响很显著,KI和H2SO4溶液的加入量的影响显著.当被测丙烯环氧化产物中H2O2的质量分数为0.5%～3.3%时,其最小的滴定样品质量m由式m=0.17/x(x代表被测环氧化产物中H2O2的质量分数)估计,且在滴定过程中KI和H2SO4溶液的加入量分别在3～8 ml和2～7 ml范围时,测定结果与真实值相吻合.在丙烯环氧化产物中H2O2质量分数相对较低(＜0.5%)时,应控制KI和H2SO4溶液的加入量不能超过8 ml和7 ml,而在H2O2质量分数相对较高(＞3.3%)时,应控制Kl和H2SO4溶液的加入量不能低于3 ml和2 ml.该规律在后来的实验中得到了验证.
The orthogonal design was employed to research the optimized titration conditions for a simulated solution of propylene epoxides. It is concluded that the amount of sample gave the most significant influence to the titration result, while the amounts of both KI and H2SO4 solutions only provided significant influences. The mass fraction（x） of H2O2 measured by titration in propylene epoxide solution was well consistent with its true value if x was in the range of 0. 5%-3. 3%, and the minimal amount （m） of the solution being titrated was estimated by m=0. 17/x and the amounts of KI and H2SO4 solutions used in titration were between 3--8 ml and 2--7 ml respectively. It is shown that titration results of the solution with different He Oe contents were always well consistent with their true value under these conditions. The maximum amounts of KI and H2SO4 solutions used in titration were not more than 8 ml and 7 ml respectively at the relative low mass fraction （〈 0. 5%） of H2O2 in propylene epoxide solution, and the minimum amounts of them are not less than 3 ml and 2 ml respectively at the relative high mass fraction （〉3. 3%） of H2O2, which is then verified by further experiments.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2005年第4期44-49,共6页
Acta Petrolei Sinica(Petroleum Processing Section)
关键词
碘量法
H2O2
正交实验设计
方差分析
iodometric titration
H2O2
orthogonal array design
variance analysis
