十溴二苯乙烷分段催化工艺及复配催化剂的研究

研究了十溴二苯乙烷分段催化的合成工艺及复配催化剂。结果表明,催化剂采用Al粉、P_2O_5、无水AlCl_3和无水TiCl_4等进行复配,不同催化剂组合在反应过程中分为三个阶段投入,第一、第二和第三阶段催化剂投料质量占成品十溴二苯乙烷理论产量的0.12%、0.12%和0.15%,分别控制不同阶段的反应温度和反应时间能显著提高产品质量,降低杂质含量。

Research on segmented catalytic process and composite catalyst for DBDPE synthesis

The segmented catalytic synthesis process of 2,2’,3,3’,4,4’,5,5’,6,6’-decabromobibenzyl (DBDPE) and its composite catalyst were studied.The results showed that the catalysts were compounded by using Al powder,phosphorus pentoxide,anhydrous AlCl₃ and anhydrous TiCl₄.The reaction process was divided into three stages,and different catalyst combination was added.In the first,second and third stages,the catalyst dosage were 0.12%,0.12% and 0.15% respectively of theoretical amounts of product DBDPE.Controlling reaction temperatures and reaction time during the different stages could remarkably improve product quality and reduce the impurity content.