A lanthanum-based phosphomolybdate catalyst and its application in catalyzing the hydrolysis of fructose to produce lactic acid

A lanthanum-based phosphomolybdate and catalyzed fructose technology, which is applied in the field of catalysis, can solve the problems of long fermentation time, large consumption of raw materials, long process flow, etc., and achieve the effect of simple preparation method and high activity

Inactive Publication Date: 2018-08-24
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the long process flow, large consumption of raw materials, high energy consumption, long fermentation time, low yield of lactic acid, unstable product quality and other problems, the technology is not mature enough, and these are in urgent need of improvement and adjustment, so it is difficult to apply to Mass production of lactic acid

Method used

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  • A lanthanum-based phosphomolybdate catalyst and its application in catalyzing the hydrolysis of fructose to produce lactic acid
  • A lanthanum-based phosphomolybdate catalyst and its application in catalyzing the hydrolysis of fructose to produce lactic acid

Examples

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Effect test

Embodiment 1

[0013] Weigh 0.56g of phosphomolybdic acid, dissolve it in 20mL of deionized water, and stir at room temperature for 30 minutes at a stirring rate of 500 rpm to obtain an aqueous solution of phosphomolybdic acid; weigh 0.12g of lanthanum nitrate and dissolve it in 20mL of deionized water, and Stir at a stirring rate of 500 rpm for 30 minutes to obtain an aqueous solution of lanthanum nitrate; under stirring conditions, the aqueous solution of lanthanum nitrate is added dropwise to the aqueous solution of phosphomolybdic acid at a rate of 2 mL / min. Raise it to 40°C and stir at a stirring rate of 800 rpm for 2 hours, then place the solution in an oven at 110°C for 12 hours, take out the solid product and grind it finely to obtain a lanthanum-based phosphomolybdate catalyst.

Embodiment 2

[0015] Weigh 0.56g of phosphomolybdic acid, dissolve it in 20mL of deionized water, and stir at room temperature for 30 minutes at a stirring rate of 500 rpm to obtain an aqueous solution of phosphomolybdic acid; weigh 0.16g of lanthanum nitrate and dissolve it in 20mL of deionized water, and Stir at a stirring rate of 500 rpm for 30 minutes to obtain an aqueous solution of lanthanum nitrate; under stirring conditions, the aqueous solution of lanthanum nitrate is added dropwise to the aqueous solution of phosphomolybdic acid at a rate of 2 mL / min. Raise it to 40°C and stir at a stirring rate of 800 rpm for 2 hours, then place the solution in an oven at 110°C for 12 hours, take out the solid product and grind it finely to obtain a lanthanum-based phosphomolybdate catalyst.

Embodiment 3

[0017] Weigh 0.56g of phosphomolybdic acid, dissolve it in 20mL of deionized water, and stir at room temperature for 30 minutes at a stirring rate of 500 rpm to obtain an aqueous solution of phosphomolybdic acid; weigh 0.20g of lanthanum nitrate and dissolve it in 20mL of deionized water, and Stir at a stirring rate of 500 rpm for 30 minutes to obtain an aqueous solution of lanthanum nitrate; under stirring conditions, the aqueous solution of lanthanum nitrate is added dropwise to the aqueous solution of phosphomolybdic acid at a rate of 2 mL / min. Raise it to 40°C and stir at a stirring rate of 800 rpm for 2 hours, then place the solution in an oven at 110°C for 12 hours, take out the solid product and grind it finely to obtain a lanthanum-based phosphomolybdate catalyst.

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Abstract

The invention discloses a lanthanum-based phosphomolybdate catalyst and application thereof in catalyzing hydrolysis of fructose for preparing lactic acid. The catalyst adopts lanthanum nitrate and phosphomolybdic acid as raw materials and is obtained by adopting an ion exchange method, the preparation method is simple, fructose can be catalyzed in a high-conversion-rate and high-activity mode to be hydrolyzed to obtain lactic acid, the conversion rate of fructose can reach 100%, and the yield of lactic acid can reach about 40-60%. The catalyst and reaction products are homogeneous, products in the solution obtained after the reaction and the catalyst are mutually dissoluble, the catalyst is recycled in an extraction and rotary evaporation separation mode, the recycled catalyst can be recycled, the recycling using activity is high, the lactic acid yield is kept unchanged after continuous and repeated reactions, and the catalyst is applied to mass production of the lactic acid.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and relates to a catalyst for producing lactic acid by hydrolyzing fructose, in particular to a lanthanum-based phosphomolybdate catalyst obtained by ion exchange with lanthanum nitrate and phosphomolybdic acid and its use in catalyzing the hydrolysis of fructose to produce lactic acid application. Background technique [0002] Lactic acid is an organic acid with a wide range of uses. It is mainly used in the food and pharmaceutical industries as a preservative, flavoring agent, and sterilizing agent. With the development of its use and the continuous improvement of people's material living standards, the demand for lactic acid is also increasing. Fructose is a simple monosaccharide, and fructo-oligosaccharides widely exist in nature, sugarcane juice, soybeans, onions, beets, asparagus and other plants contain fructo-oligosaccharides, which are abundant and cheap, and fructose can catalyze Un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/19
CPCB01J27/19
Inventor 董文生李浩赵博文刘春玲杨贝贝
Owner SHAANXI NORMAL UNIV
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