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CN106967365A 一种脱出结合氯制备低氯漂白紫胶的方法 无效 - 驳回

  • 专利标题： 一种脱出结合氯制备低氯漂白紫胶的方法
  • 专利标题（英）： Method for preparing low-chlorine bleached shellac by removing combined chlorine
  • 申请号： CN201710275715.1
    申请日： 2017-04-25
  • 公开(公告)号： CN106967365A
    公开(公告)日： 2017-07-21
  • 发明人: 廖亚龙 , 王祎洋 , 曹磊
  • 申请人： 昆明理工大学
  • 申请人地址： 云南省昆明市五华区学府路253号
  • 专利权人： 昆明理工大学
  • 当前专利权人： 昆明理工大学
  • 当前专利权人地址： 云南省昆明市五华区学府路253号
  • 主分类号： C09F1/02
  • IPC分类号： C09F1/02
一种脱出结合氯制备低氯漂白紫胶的方法
摘要：
本发明涉及一种脱出结合氯制备低氯漂白紫胶的方法，属于精细化工技术领域。首先将漂白紫胶加入到乙醇中得到漂白紫胶乙醇溶液；向漂白紫胶乙醇溶液中加入Pd‑Ni/γ‑Al2O3‑SiO2双金属催化剂，然后通入氢气，在微波辐照条件下于反应温度为室温至70℃反应30~120min，反应结束后，过滤得到双金属催化剂和滤液，滤液经减压蒸馏出乙醇后真空干燥得到低氯漂白紫胶，其中Pd‑Ni/γ‑Al2O3‑SiO2双金属催化剂中Pd质量百分含量为0.5%~2.0%，Ni质量百分含量为0.5%~5.0%，γ‑Al2O3与SiO2的质量比为1~3:1。本发明利用Pd‑Ni/γ‑Al2O3‑SiO2复合载体双金属催化剂的吸附氢和催化加氢反应的特性，催化离解漂白紫胶中的结合氯制备得到能用于食品及制药行业的低氯漂白紫胶。
摘要（英）：

The invention relates to a method for preparing low-chlorine bleached shellac by removing combined chlorine, and belongs to the technical field of fine chemical engineering. The method comprises the following steps: adding bleached shellac into ethanol to obtain a bleached shellac ethanol solution; and adding a Pd-Ni/gamma-Al2O3-SiO2 bimetallic catalyst into the bleached shellac ethanol solution, introducing hydrogen, reacting at the temperature being from room temperature to 70 DEG C for 30 to 120 minutes under the microwave irradiation condition, filtering after the reaction to obtain a bimetallic catalyst and filtrate, performing reduced pressure distillation on the filtrate to remove ethanol, and performing vacuum drying to obtain the low-chlorine bleached shellac, wherein in the Pd-Ni/gamma-Al2O3-SiO2 bimetallic catalyst, the mass percentage content of Pd is 0.5 to 2.0 percent, the mass percentage content of Ni is 0.5 to 5.0 percent, and the mass ratio of gamma-Al2O3 to SiO2 is (1-3):1. The low-chlorine bleached shellac for food and pharmaceutical industries is prepared by utilizing the hydrogen adsorption and catalytic hydrogenation reaction characteristics of the Pd-Ni/gamma-Al2O3-SiO2 composite carrier bimetallic catalyst to perform catalytic dissociation on the combined chlorine in the bleached shellac.

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