Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Catalyst for preparation of lactic acid ester by catalyzing conversion of complex sugars

A catalyst and lactate technology, applied in the preparation of physical/chemical process catalysts, molecular sieve catalysts, organic compounds, etc. Separation and recycling, the effect of a wide range of applications

Inactive Publication Date: 2019-02-01
ZHENGZHOU UNIV
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, tin-containing silicate molecular sieves with different configurations have different selectivity to lactate; molecular sieves with the same configuration have different preparation methods, and there are also large differences in selectivity to lactate, which seriously restricts the use of chemical catalysts. Practical application of the method to prepare lactate from sugar

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The commercial Beta molecular sieve (BEA configuration) was treated with 13 mol / L nitric acid at 100°C for 20 hours to dealuminate (solid-liquid ratio 1 g / 20 mL), and the dealuminated Beta molecular sieve and SnCl 4 ·5H 2 O mixed and ground evenly, and obtained Sn-Beta molecular sieve after drying and high-temperature roasting.

[0023] Using the prepared Sn-Beta (0.1 g) as the main catalyst, commercial WO 3 Solid (0.1 g) was used as cocatalyst, glucose (0.4 g) was used as raw material, methanol (15 mL) was used as reaction solvent, N 2 Under the atmosphere (0.4 MPa), the reaction was carried out at 160 °C for 5 h, and 52 % (the yields were all carbon yields) of methyl lactate was obtained.

Embodiment 2

[0025] Using ethyl silicate as Si source, SnCl 4 ·5H 2 O is the source of Sn. Sn-Beta molecular sieves with a Sn content of 1 wt% were synthesized by hydrothermal method, and used after high-temperature calcination to remove the template agent.

[0026] Make ammonium tungstate into an aqueous solution, add Sn-Beta molecular sieve (1 g), control the W / Sn molar ratio to 1, stir evenly, dry at 90°C for 10 hours, and roast at 500°C for 6 hours to obtain W dispersed in Sn-Beta Catalysts on molecular sieves. Take 0.1 g of the catalyst and catalyze the conversion of glucose under the reaction conditions described in Example 1 to obtain methyl lactate with a yield of 50%.

Embodiment 3

[0028] Using the method in Example 1, the USY (FAU type) molecular sieve containing Al was dealuminated and tin supplemented to obtain a Sn-USY molecular sieve. With 0.1 g Sn-USY molecular sieve as the main catalyst, 0.1 g WO 3 Solid is procatalyst, and all the other reaction conditions are with embodiment 1, obtain the methyl lactate yield of 50% from glucose.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a catalyst for preparation of lactic acid ester by catalyzing conversion of complex sugars. The catalyst is composed of a tin-containing silicate molecular sieve as a main catalyst and WO3 as a co-catalyst. The catalyst can catalyze the conversion of sugars, especially hexose, into lactic acid ester in high yield. The catalyst can be easily separated and recovered, and can still obtain good results for a high-concentration sugar solution.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a catalyst for catalyzing the efficient conversion of complex sugars such as sucrose, glucose, fructose and xylose to prepare lactate. Background technique [0002] Lactic acid esters are widely used in food, cosmetics, chemicals and pharmaceutical industries. As a raw material for the preparation of biodegradable plastic polylactic acid, its demand is increasing year by year. At present, sucrose or glucose is mainly used as raw materials to obtain crude lactic acid through microbial fermentation, and the crude lactic acid is then subjected to esterification to obtain lactic acid ester. However, during the fermentation process, it is necessary to continuously add quicklime to maintain the pH value of the fermentation tank to maintain the activity of microorganisms. To obtain crude lactic acid, it is necessary to add a large amount of sulfuric acid for acidification, resulting i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/78B01J29/16B01J29/48B01J29/03B01J29/04C07C69/68C07C67/00
CPCB01J29/0341B01J29/045B01J29/166B01J29/48B01J29/78B01J29/7815B01J2229/183B01J2229/186C07C67/00C07C69/68
Inventor 杨晓梅周利鹏芦天亮
Owner ZHENGZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com