Wonderful Dl-Tartaric Acid with High Quality

• CAS No.: 133-37-9
• Color: White
• Appearance: Powder
• Transport Package: Paper
• Specification: large
• Trademark: china
• Model NO.: E1422
• Origin: China
• HS Code: 2930400000
• Production Capacity: 5000kg/Year

Product Description

In this work, the addition of 5%SiO₂ to 7.5%WO₃-ZrO₂ catalyst increased the content of tetragonal ZrO₂ and BET, which could promote the formation of W-O-Zr(Si) bonds between WO_x species and 5%SiO₂-ZrO₂ material, thus reducing the degree of aggregation of WO_x species. The oligomerized WO_x species on the 7.5%WO₃-5%SiO₂-ZrO₂ catalyst could not only remain stable, but also provided stable Lewis acid for the activation of  and or epoxidation. In addition, the Si-O-Zr bond on SiO₂-modified 7.5%WO₃-ZrO₂ catalyst could provide an additional Brønsted acid site for activating the hydrolysis of epoxysuccinic acid to DL-tartaric acid. Therefore, the DL-tartaric acid yield of SiO₂-modified 7.5%WO₃-ZrO₂ catalyst was higher than that of 7.5%WO₃-ZrO₂ catalyst, and also higher than that of Na₂WO₄ catalyst.In this work, the addition of 5%SiO₂ to 7.5%WO₃-ZrO₂ catalyst increased the content of tetragonal ZrO₂ and BET, which could promote the formation of W-O-Zr(Si) bonds between WO_x species and 5%SiO₂-ZrO₂ material, thus reducing the degree of aggregation of WO_x species. The oligomerized WO_x species on the 7.5%WO₃-5%SiO₂-ZrO₂ catalyst could not only remain stable, but also provided stable Lewis acid for the activation  and  for epoxidation. In addition, the Si-O-Zr bond on SiO₂-modified 7.5%WO₃-ZrO₂ catalyst could provide an additional Brønsted acid site for activating the hydrolysis of epoxysuccinic acid to DL-tartaric acid. Therefore, the DL-tartaric acid yield of SiO₂-modified 7.5%WO₃-ZrO₂ catalyst was higher than that of 7.5%WO₃-ZrO₂ catalyst, and also higher than that of Na₂WO₄ catalyst.