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Citation: CHENG Qing-Yan, ZHONG Shun-He. Synthesis of Methacrylic Acid from CO₂ and Propylene on Ni₂(OCH₃)₂/SiO₂ Catalyst under Supercritical Condition[J]. Chinese Journal of Applied Chemistry, ;2003, 20(11): 1039-1043. shu

Synthesis of Methacrylic Acid from CO₂ and Propylene on Ni₂(OCH₃)₂/SiO₂ Catalyst under Supercritical Condition

CHENG Qing-Yan ,
ZHONG Shun-He ^,

1.
State Key Laboratory of C₁ Chemistry and Technology, College of Chemical Engineering and Technology, Tianjin University, Tianjin 300072

Corresponding author: ZHONG Shun-He,
Received Date: 12 March 2003
Available Online: 26 May 2003
Fund Project: 国家重大基础研究前期研究专项(2001CCA03600)资助项目 (2001CCA03600)

The Ni₂(OCH₃)₂/SiO₂ catalyst was prepared by surface modification reaction and ion-exchange method. The surface structure, chemisorption and reactivity of the catalyst were examined by IR and supercritical reaction. The experiment results indicated that Ni²⁺is bond with surface O^2- of SiO₂ support in bidentate fashion in the supported dinuclear bridged methoxide complex Ni₂(OCH₃)₂, that the CO₂ is chemically adsorbed on the catalysts in bridged adsorption state and carbonate species and the propylene is chemically adsorbed on the catalyst in a molecular adsorption state. Under supercritical condition 313 K, 7.5 MPa and reaction time 3 h, the Ni₂(OCH₃)₂/SiO₂ catalyst gave almost 100% methacrylic acid from CO₂ and propylene in synthesis.
- methacrylic acid,
- carbon dioxide,
- propylene,
- supercritical reaction,
- supported catalyst,
- dinuclear bridged complex
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Synthesis of Methacrylic Acid from CO₂ and Propylene on Ni₂(OCH₃)₂/SiO₂ Catalyst under Supercritical Condition