Method for catalytically converting biomass into lactic acid by using modified beta-molecular sieve

一种β分子筛、催化转化的技术，应用在乳酸领域，能够解决产物与催化剂分离未解决等问题，达到制备过程简易、乳酸产率高、反应原料低廉易得的效果

Active Publication Date: 2015-03-04
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent (CN 102603512 A) also reported the use of metal compounds as catalysts to catalyze the conversion of polysaccharides, disaccharides and monosaccharides to produce lactic acid, but the problem of separating the product from the catalyst has not yet been resolved

Method used

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  • Method for catalytically converting biomass into lactic acid by using modified beta-molecular sieve

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Catalyst preparation: mix β molecular sieve with concentrated nitric acid at a mass ratio of 1:110, at a temperature of 100 o Stirring and dealumination at C for 20 h, centrifugation and washing 8 times, 80 o C drying for 2 h, then 150 o C dried for 10 h to obtain dealuminated β molecular sieves, mixed 1 g of dealuminated β molecular sieves with 83.85 mg copper acetate (0.42 mmol Cu), and ground for 15 min at a temperature of 550 o C, Calcined in the air atmosphere for 6 h, the aluminum-free Cu-β molecular sieve catalyst can be obtained.

[0025] Catalytic reaction: The reaction was carried out in a stainless steel reactor lined with polytetrafluoroethylene, weighed 225 mg of glucose, 160 mg of aluminum-free Cu-β molecular sieve catalyst, and 10 g of deionized water, and directly placed the reactor in the The reaction was carried out in a rotary oven, the rotation speed of the rotary oven was 20 r / min, and the temperature was 190 o C, the reaction time was 2 h; the p...

Embodiment 2

[0027] Catalyst preparation: mix β molecular sieve with concentrated nitric acid at a mass ratio of 1:110, at a temperature of 100 o Stirring and dealumination at C for 20 h, centrifugation and washing 8 times, 80 o C drying for 2 h, then 150 o C drying for 10 h to obtain dealuminated β molecular sieves, mixed 1 g of dealuminated β molecular sieves with 92.19 mg zinc acetate (0.42 mmol Zn), ground for 20 min, at a temperature of 550 o C, Calcined in air atmosphere for 6 h, the aluminum-free Zn-β molecular sieve catalyst can be obtained.

[0028] Catalyzed reaction: The reaction was carried out in a stainless steel reactor lined with polytetrafluoroethylene. Weighed 225 mg of sucrose, 160 mg of aluminum-free Zn-β molecular sieve catalyst, and 10 g of deionized water, and directly placed the reactor in the The reaction was carried out in a rotary oven, the rotation speed of the rotary oven was 20 r / min, and the temperature was 190 o C, the reaction time was 2 h; the product w...

Embodiment 3

[0030] Catalyst preparation: mix β molecular sieve with concentrated nitric acid at a mass ratio of 1:110, at a temperature of 100 o Stirring and dealumination at C for 20 h, centrifugation and washing 8 times, 80 o C drying for 2 h, then 150 o C drying for 10 h to obtain dealuminated β molecular sieve, mixed 1 g of dealuminated β molecular sieve with 92.19 mg of tin acetate (0.42 mmol Sn), ground for 20 min, at a temperature of 550 o C, roasting in air atmosphere for 6 h, the aluminum-free Sn-β molecular sieve catalyst can be obtained.

[0031] Catalytic reaction: The reaction was carried out in a stainless steel reactor lined with polytetrafluoroethylene, weighed 225 mg of sucrose, 160 mg of aluminum-free Sn-β molecular sieve catalyst, and 10 g of deionized water, and directly placed the reactor in the The reaction was carried out in a rotary oven, the rotation speed of the rotary oven was 20 r / min, and the temperature was 190 o C, the reaction time was 2 h; the product w...

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Abstract

The invention relates to a method for catalytically converting biomass into lactic acid by using a modified beta-molecular sieve. According to the provided method, a catalyst is easy to prepare and can be repeatedly utilized, the reaction raw materials are low in cost, the reaction conditions are mild, the reaction is finished in one step, and the lactic acid yield is high. The catalyst preparation method comprises the following steps: removing aluminum from the beta-molecular sieve by virtue of nitric acid, and fixing metals to the dealuminizing molecular sieve in a solid-state ion exchange mode. The catalytic reaction comprises the following steps: adding biomass, a catalyst and water into a reaction kettle, heating the reaction kettle in a rotary drying oven, performing centrifugal separation on the product so as to obtain the lactic acid, centrifuging the obtained solid catalyst, and activating, wherein the product can serve as a catalyst again.

Description

technical field [0001] The invention relates to lactic acid, in particular to a method for using biomass as a raw material and catalytically converting biomass into lactic acid through modified beta molecular sieves. Background technique [0002] Lactic acid is widely used in food, medicine, chemical industry and other fields. In the food industry, lactic acid is used as a safe food additive, as an acidulant, emulsifier and preservative, etc. In the pharmaceutical industry, lactic acid is used for disinfection in operating rooms and other places; lactate and lactic acid esters can be used as drugs; especially polylactic acid materials are biocompatible and can be used as prosthetics. After implantation, the human body has a chance of inflammation and infection Low and strong. In the chemical industry, lactic acid is an important platform compound that can be converted into other useful chemicals such as acetaldehyde, propylene glycol, propionic acid, pyruvic acid, etc. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C59/08C07C51/00B01J29/76B01J29/70B01J29/78
CPCB01J29/7057B01J29/7615B01J2229/16B01J2229/37C07C51/00C07C59/08B01J29/00
Inventor 沈峥张亚雷董文杰周雪飞
Owner TONGJI UNIV
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