Page 224 - 《精细化工》2020年 第10期
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第 37 卷第 10 期                            精   细   化   工                                 Vol.37, No.10
             2020 年 10 月                             FINE CHEMICALS                                 Oct.    2020


              精细化工中间体
                        Zn(OAc) •2H O 热处理对 2,4-甲苯二氨基
                                       2
                                               2
                                          甲酸甲酯合成的影响



                                           1
                                                        1
                                  张嘉振 ,马雪晴 ,王桂荣                      1,2* ,王延吉      1,2*
                 (1.  河北工业大学  化工学院,天津    300130;2.  绿色化工与高效节能河北省重点实验室,天津    300130)

                 摘要:借助 TG、FTIR 和 XRD 表征分析了 Zn(OAc) 2 •2H 2 O 在热处理过程中组成的变化。Zn(OAc) 2 •2H 2 O 在 100
                 ℃热处理 8 h 内仅发生脱水反应;在 120  ℃热处理 4 h,产物中有 Zn 4 O(OAc) 6 生成,并且其相对含量随热处理
                 时间的延长而增加;在 160  ℃热处理 6 h 时有 ZnO 生成,延长至 12 h 后产物大部分为 ZnO。将 Zn(OAc) 2 •2H 2 O
                 在不同热处理条件下得到的产物用于催化合成 2,4-甲苯二氨基甲酸甲酯(2,4-TDC)。当反应温度为 160  ℃时,
                 Zn(OAc) 2 •2H 2 O 在 100  ℃热处理 8 h 后催化合成 2,4-TDC 的收率达到 88.1%,说明该反应温度下 Zn(OAc) 2 的催
                 化活性较高;当反应温度为 180  ℃时,Zn(OAc) 2 •2H 2 O 在 140  ℃热处理 8  h 后催化合成 2,4-TDC 的收率达到
                 92.8%,说明该反应温度下 Zn 4 O(OAc) 6 拥有更高的催化活性。
                 关键词:乙酸锌;热处理;2,4-甲苯二氨基甲酸甲酯;催化活性
                 中图分类号:TQ225.2      文献标识码:A      文章编号:1003-5214 (2020) 10-2154-07



                             Effect of thermal treatment of Zn(OAc) 2•2H 2O on the
                                       synthesis of 2,4-toluene dicarbamate


                                                          1
                                            1
                             ZHANG Jiazhen , MA Xueqing , WANG Guirong    1,2* , WANG Yanji 1,2*
                 (1. College of Chemical Engineering, Hebei University of Technology, Tianjin 300130, China; 2. Key Laboratory of
                 Green Chemicals and Energy-Efficient Hebei Province, Tianjin 300130, China)

                 Abstract: The composition changes of Zn(OAc) 2•2H 2O during thermal treatment were characterized and
                 analyzed by TG, FTIR and XRD. Only dehydration reaction occurred after heat treatment of Zn(OAc) 2 •2H 2 O
                 at 100  ℃  for 8 h. After thermal treatment of Zn(OAc) 2•2H 2O at 120  ℃  for 4 h, Zn 4O(OAc) 6 was formed
                 in  the  product  and  its  relative  content  increased  with  the  increase  of  thermal  treatment  time.  ZnO  was
                 formed after thermal treatment of Zn(OAc) 2•2H 2O at 160  ℃  for 6 h, and most of the products were ZnO
                 after thermal treatment at 160  ℃  12 h. The products of Zn(OAc) 2•2H 2O under different thermal treatment
                 conditions were used as catalysts for the synthesis of 2,4-toluene dicarbamate (2,4-TDC). At 160  ℃, the
                 yield of 2,4-TDC catalyzed by the product after thermal treatment of Zn(OAc) 2•2H 2O at 100  ℃ for 8 h
                 reached 88.1%, indicating that the catalytic activity of Zn(OAc) 2 was higher at 160  ℃. When the reaction
                 temperature reached 180  ℃, the yield of 2,4-TDC catalyzed by the product after thermal treatment of of
                 Zn(OAc) 2•2H 2O at 140  ℃  for 8 h was up to 92.8%, which shows that Zn 4O(OAc) 6 had a higher catalytic
                 activity at 180  ℃.
                 Key words: zinc acetate; thermal treatment; 2,4-toluene dicarbamate; catalytic activity


                 甲苯二异氰酸酯(TDI)是生产聚氨酯的重要                         遍采用光气法生产 TDI,该方法原料毒性大、能耗
            原料,由聚氨酯制成的黏合剂、涂料等产品已广泛                             高、副产物氯化氢易造成设备腐蚀和环境污染。因
            用于家具、汽车、船舶等领域              [1-2] 。目前,工业上普          此,开发环境友好的非光气合成 TDI 路线成为国内

                 收稿日期:2020-04-24;  定用日期:2020-06-30; DOI: 10.13550/j.jxhg.20200343
                 基金项目:国家自然科学基金(21236001,21776057)
                 作者简介:张嘉振(1995—),男,硕士生,E-mail:2029449528@qq.com。联系人:王桂荣(1963—),女,教授,E-mail:
                 wangguirong111@126.com;王延吉(1962—),男,教授,E-mail:yjwang@hebut.edu.cn。
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