Application of supported alkali catalysts in Prins reaction

WANG Haiyong; LÜ Hui; LIN Chen; ZHU Zhenwei; XU Kangdong; CAO Guiping

doi:10.11949/j.issn.0438-1157.20150187

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Application of supported alkali catalysts in Prins reaction

更新时间：2025-12-10

- Application of supported alkali catalysts in Prins reaction
- CIESC Journal Issue 10, Pages: 3911-3918(2015)
- 作者机构：
  
  华东理工大学化学工程联合国家重点实验室,上海,200237
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150187
  CLC： Q426.1
- Online First：05 October 2015，
  
  Published：05 October 2015
- 稿件说明：
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WANG Haiyong, LÜ Hui, LIN Chen, et al. Application of supported alkali catalysts in Prins reaction[J]. CIESC Journal, 2015, (10): 3911-3918.
DOI：

WANG Haiyong, LÜ Hui, LIN Chen, et al. Application of supported alkali catalysts in Prins reaction[J]. CIESC Journal, 2015, (10): 3911-3918. DOI： 10.11949/j.issn.0438-1157.20150187.

摘要

分别采用浸渍法和共沉淀法制备了负载金属氧化物的固体碱催化剂MnO/Al2O3 (M=Na

Sr;n=1

2)和C-Cs2O/Al2O3

测定了催化剂的碱量和pKa值

分别采用CO2-TPD、X射线衍射、N2物理吸附表征了催化剂的物理化学性质。以异丁烯与多聚甲醛经Prins反应制备3-甲基-3-丁烯-1-醇(MBO)为体系考察催化剂活性。结果表明

催化剂的碱性和结构直接影响其催化活性

采用共沉淀法制备的Cs2O/Al2O3催化剂具有更强的碱性

表现出了优越的反应活性

甲醛的转化率和产物MBO的选择性分别为100.0%和86.0%。探讨了固体碱催化反应的机理

发现碱性位可以活化异丁烯的a-H

促进Prins反应。

Abstract

Solid base catalysts MnO/Al2O3 (M=Na

n=1 or 2) prepared by impregnation method and C-Cs2O/Al2O3 by co-precipitation method were applied in Prins reaction. Their base amount and pKa in water were determined. The structure and physico-chemical properties of the carrier and prepared catalysts were characterized by CO2-TPD

X-ray diffraction

and nitrogen adsorption. The performance of catalysts was evaluated by condensation reaction of isobutene with paraformaldehyde to produce 3-methyl-3-buten-1-ol. The results showed that the performance of catalysts related directly with their basic property and structure. The C-Cs2O/Al2O3 catalyst had stronger basicity and showed superior catalytic performance

and the conversion of formaldehyde and selectivity to MBO reached up to 100.0% and 86.0% respectively. The mechanism of Prins reaction over solid base catalyst was also discussed. The base sites could active the a-H of isobutene

and so could promote the Prins reaction.

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