CAJ | 학술논문

研究了山梨糖醇与苯甲醛在酸性催化剂条件下脱水缩合制备成核剂二亚苄基山梨糖醇（DBS）的反应规律,筛选出较好的反应溶剂﹑反应催化剂﹑反应促进剂和产品后处理工艺,确定了最佳反应条件。促进剂甲醇的使用和加入方式,对缩合反应影响最大,甲醇的最佳加入方式是分批加入法,反应温度可以在最佳的范围内波动,有利缩合反应进行,副反应较少,反应收率高,DBS产物熔点高,甲醇的最佳加入量为溶剂环己烷质量的12%左右,过量的使用对后面的反应影响不大,反而延长了反应时间,造成促进剂浪费和回收成本的增加。
연구료산리당순여분갑철재산성최화제조건하탈수축합제비성핵제이아변기산리당순（DBS）적반응규률,사선출교호적반응용제﹑반응최화제﹑반응촉진제화산품후처리공예,학정료최가반응조건。촉진제갑순적사용화가입방식,대축합반응영향최대,갑순적최가가입방식시분비가입법,반응온도가이재최가적범위내파동,유리축합반응진행,부반응교소,반응수솔고,DBS산물용점고,갑순적최가가입량위용제배기완질량적12%좌우,과량적사용대후면적반응영향불대,반이연장료반응시간,조성촉진제낭비화회수성본적증가。
Condensation reaction of sorbitol with benzaldehyde using acid catalyst to prepare nacleating agent dibenzyline sorbitol（DBS） was studied. Suitable solvent, catalyst and reaction promoter was selected, and the best reaction conditions was determined. Promoter methanol had great effect on condensation reaction. The best feeding mode of methanol is batch feeding. Dibenzylidene Sorbitol （DBS） yield is higher, side reaction is less and melting point of DBS is high when reaction temperature is controlled in best range. The best adding quantity of methonal is 12%（wt） of the solvent cyclohexone. Over-addition of methanol has little effect on condensation reaction and extended reaction time, to cause the methanol wastes and recovery cost increases. 更