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Citation: JIN Hua-Feng, LI Bao-Zhang. Preparation of Nanosized Solid Superacid S₂O₈^2-/CoFe₂O₄ and Catalytic Synthesis of Diethyl Sebacate[J]. Chinese Journal of Applied Chemistry, ;2003, 20(1): 10-14. shu

Preparation of Nanosized Solid Superacid S₂O₈^2-/CoFe₂O₄ and Catalytic Synthesis of Diethyl Sebacate

JIN Hua-Feng ^a,, ,
LI Bao-Zhang ^b

1.
a Department of Chemistry, Ankang Teacher's College, Ankang 725000;
2.
b Department of Chemical Engineering, Northwest University, Xi'an

Corresponding author: JIN Hua-Feng,
Received Date: 12 August 2002
Available Online: 27 December 2002
Fund Project: 陕西省教育厅自然科学专项应用基础研究项目(01JK203) (01JK203)中国石油天然气集团公司科学研究与开发项目(99081603) (99081603)安康师专科研基金项目(2002AZXZR003) (2002AZXZR003)

Reacting the mixture of fine cobalt sulfate and ferrous sulfate with PEG-600 in NaOH solution(at pH=9.0) gave a precusor, CoFeO(OH)₂O, which after immersion in (NH₄O)₂S₂O₈ solution, reacting, drying and calcinating at 500℃ afforded the title solid superacid S₂O₈^2-/CoFe₂O₄. The compound was characterized by XRD, TEM, BET, TG-DTA techniques and chemical analysis. The results show that S₂O₈^2-/CoFe₂O₄ was sized in 42 nm with specific surface area of 146 m²/g. The solid superacid S₂O₈^2-/CoFe₂O₄ was used as catalyst in synthesis of diethyl sebacate from absolute ethanol and sebacic acid. At the conditions of 1.0 g catalyst with the acid strength of -16.02< H₀< -14.52, 0.1 mol sebacic acid, molar ratio of absolute ehtanol to sebacic acid 4.0:1.0, and reaction time of 2.5 h, diethyl sebacate in yield of 93.6% was obtained.
- nanosized solid superacid,
- S₂O₈^2-/CoFe₂O₄,
- diethyl sebacate,
- catalytic esterification
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Preparation of Nanosized Solid Superacid S₂O₈^2-/CoFe₂O₄ and Catalytic Synthesis of Diethyl Sebacate