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Citation: WANG Jian-Xiang, GU Li-Xing. Synthesis of Sodium D-isoascorbate Using Solid Super Acid SO₄^2-/SiO₂-TiO₂ as a Catalyst[J]. Chinese Journal of Applied Chemistry, ;2005, 22(12): 1347-1350. shu

Synthesis of Sodium D-isoascorbate Using Solid Super Acid SO₄^2-/SiO₂-TiO₂ as a Catalyst

WANG Jian-Xiang ^a,, ,
GU Li-Xing ^b

1.
a Tai zhou Polytechnical Institute, Taizhou 225300;
2.
b Jiangsu Hehai Nanometer Science & Technology Co. Ltd, Taixing

Corresponding author: WANG Jian-Xiang,
Received Date: 25 February 2005
Available Online: 15 May 2005

Sodium D-isoascorbate was synthesized from 2-keto-D-giucal and methanol using solid super acid SO₄^2-/SiO₂-TiO₂ as a catalyst via an esterification process,in which the water formed was removed by fraction distillation.The performance of SO₄^2-/SiO₂-TiO₂ and H₂SO₄ catalysts was compared.The optimum reaction conditions were found as follows:m(2-KGA):m(SO₄^2-/SiO₂-TiO₂)=1:0.025,calcination temperature of the catalyst 550℃,reaction time 3~4 h,and the yield of the esterification was 88.6%.The solid super acid catalyst can be reused.
- food additive,
- sodium D-isoascorbate,
- solid super acid,
- synthesis
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Synthesis of Sodium D-isoascorbate Using Solid Super Acid SO₄^2-/SiO₂-TiO₂ as a Catalyst