增塑剂DOP的非质子酸催化合成工艺

Synthesis of DOP over non-acid catalysts

较详细地研究了Ｔｉ（ＯＢｕ）４和ＳｎＯ催化合成增塑剂ＤＯＰ［邻苯二甲酸二（２－乙基）己酯］的反应规律。实验结果表明，ＳｎＯ是较好的ＤＯＰ合成催化剂，可使生产工艺简化，省去酸催化工艺中的碱洗、水洗工序，减少废水排放，降低生产成本。

he synthesis of DOP plastifier is studied via esterification of phthalic anhydride with 2ethylhexanol over Ti(OBu)4 or SnO. Experimental results show that SnO is a good catalyst and has much higher catalytic activity than Ti (OBu )4. When SnO is used, the aftertreatment in manufacturing DOP may be simplified by eliminating the alkali-and waterwashing steps in an acid catalyzing process so that the discharge of waste water can be reduced and production cost lowered.