Synthesis of Sulfated Zirconia Solid Acids and their Activities for Hydrolysis of Ethyl Lactate

Wei Xing Li; Ying Xiang Ni; Wei Hong Xing

doi:10.4028/www.scientific.net/AMR.233-235.1529

Paper Titles

Sintering Kinetics of Hydroxyapatite Prepared by Chemical Coprecipitation Method
p.1511

Structural and Electrochemical Study of Dandelion-Like Manganese Dioxide Synthesized by a New Microwave Hydrothermal Method
p.1516

The Complex Formulation and Performance Research of a New Stopped-Boiler Protectant
p.1520

Synthesis of Silicalite-1 Membranes on the Surface of Stainless Steel
p.1524

Synthesis of Sulfated Zirconia Solid Acids and their Activities for Hydrolysis of Ethyl Lactate
p.1529

Effects of CuCl Source and Content on Direct Synthesis of Triethoxysilane from Silicon and Ethanol
p.1534

Synthesis of Asymmetric Tridentate Cobalt(II) Complex and Application in Ethylene Oligomerization
p.1540

Pt/C Catalyst for Hydrosilylation of Allyl Glycidyl Ether with Trimethoxysilane
p.1544

Preparation and Characterization of Carbon Hydroxyapatite with Different Carbon Content
p.1548

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 233-235Synthesis of Sulfated Zirconia Solid Acids and...

Synthesis of Sulfated Zirconia Solid Acids and their Activities for Hydrolysis of Ethyl Lactate

Abstract:

A kind of solid acid (sulfated zirconia) was proposed to be used as the catalyst for the hydrolysis of ethyl lactate because esterification-hydrolysis was usually applied to produce lactic acid of high purity. The sulfated zirconia was prepared via a simple chemical precipitation and impregnation approach. The prepared catalysts were characterized by means of XRD, TG-DSC, FT-IR, and NH₃-TPD. Catalytic activity of the prepared catalysts was evaluated by the hydrolysis reaction of ethyl lactate. The characterization results showed that the prepared sulfated zirconia was of tetragonal phase at the optimum calcination temperature of 650°C and had strong acidity. The conversion of hydrolysis of ethyl lactate using the prepared catalyst was 82.62%. Although the conversion was lower than that of liquid acid (p-toluenesulfonicacid), the solid acid catalyst was easier to be separated from the products. It resolved the problems of pollution and catalyst reuse. This work might provide a new green process for producing lactic acid of high purity.