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Method for preparing chemical products by direct hydrothermal hydrogenation of microalgae

A hydrothermal hydrogenation and chemical technology, which is applied in chemical instruments and methods, organic chemistry, carbon-based compound preparation, etc., can solve the problems of long time, high price and high cost of enzymatic hydrolysis and saccharification, and achieve easy cultivation, The effect of high conversion rate and short growth cycle

Active Publication Date: 2014-06-18
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI +1
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  • Application Information

AI Technical Summary

Problems solved by technology

Most of these methods use pure cellulose as raw material, most of the required cellulose is extracted from lignocellulose, the cost is high and expensive
Mou Xingdong and others proposed a coupling process of raw material pretreatment, enzymatic hydrolysis saccharification and catalytic hydrogenation hydrogenation technology to prepare glycol products, in which the yield of propylene glycol can reach 29.8%, but the raw materials in this process need acid-base pretreatment, enzymatic hydrolysis The time required for saccharification is long and the cost is high, which brings some inconvenience to the actual operation (CN102286548A, 2011)

Method used

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  • Method for preparing chemical products by direct hydrothermal hydrogenation of microalgae

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The experiments were carried out in a Parr autoclave with a volume of 100ml and operated in batch mode. First add 0.5g of Scenedesmus and 50ml of deionized water into the reactor, the solid-to-liquid ratio is 1g:100mL, wherein the carbohydrate content of Scenedesmus is 60.15% (mass percentage), N content: 0.006% (mass percentage), S content: 0.08% (mass percentage). After adding 0.15g of hydrogenation catalyst (catalyst with hydrogenation and hydrogenolysis activity), seal the reaction kettle, pass high-purity hydrogen to replace the air in the kettle, and keep the initial partial pressure of hydrogen at 4MPa, and control the stirring speed at 600r / min . After the heating starts, the temperature rises to 280°C at a rate of 15K / min, reacts for 30 minutes, stops heating, and after cooling to room temperature, carefully collects the reaction product, and separates the liquid phase product and the solid catalyst by centrifugation. After filtering through the filter head, ...

Embodiment 2

[0031] The specific implementation process is the same as in Example 1, except that 10g of Scenedesmus and 50ml of deionized water are added, the solid-to-liquid ratio is 20g:100mL, and 2.0g of hydrogenation catalyst is added at the same time; the reaction temperature is stabilized at 250°C, and the reaction time is extended to 2h , the initial hydrogen partial pressure was set at 8MPa.

[0032] After the reaction, the product analysis showed that the hydrothermal conversion rate of Scenedesmus reached 100%, among which, the yield of 1,2-propanediol reached 9.32%, ethylene glycol was 7.86%, and acetol was 30.66%.

Embodiment 3

[0034]The specific implementation process is the same as in Example 1, except that the added raw material is chlorella, the carbohydrate content of chlorella is 50.24%, the N content: 0.008%, and the S content: 0.07%. The quality of the added chlorella was 5g, the deionized water was 50ml, the solid-to-liquid ratio was 10g:100mL, and a hydrogenation catalyst with a mass of 1.0g was added at the same time; The pressure is set at 6MPa.

[0035] After the reaction, product analysis revealed that the hydrothermal conversion rate of Chlorella reached 78.36%, of which, the yield of 1,2-propanediol reached 10.34%, that of ethylene glycol was 13.46%, and that of acetol was 35.42%.

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Abstract

The invention discloses a method for preparing chemical products by direct hydrothermal hydrogenation of microalgae. The method comprises the following steps: adding the microalgae and water into a reactor, and performing hydrogenation hydrogenolysis reaction in the presence of a catalyst with hydrogenation hydrogenolysis activity for 10-360 minutes to obtain the chemical products. The method can be used for preparing the chemical products with high added values such as dihydric alcohol and acetone alcohol, and CO2 can be subjected to high-efficiency biological fixation and chemical conversion as the microalgae as new environment-friendly renewable biomass energy resources are utilized.

Description

technical field [0001] The invention relates to a method for preparing chemicals, in particular to a method for preparing chemicals by direct hydrothermal hydrogenation of microalgae. Background technique [0002] Dihydric alcohol is a very important polyester polymer monomer, which can be used to produce unsaturated polyester resin, polyurethane, fuel additives, surfactants, emulsifiers, antifreeze for motor vehicles, etc., and its most important use is to produce unsaturated Resin (UPR). In 2010, my country's UPR production capacity was 1.7 million tons, and the consumption of glycol was 500,000 tons. The market prospect is broad. my country has a large demand for diols and mostly relies on imports. At the same time, the petroleum-based production route is unsustainable. At present, domestic related companies use corn starch as raw material to prepare diols through the process of enzymatic hydrolysis of sugar and sugar hydrogenation hydrogenolysis. The production of chemica...

Claims

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Application Information

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IPC IPC(8): C07C29/136C07C31/20C07C49/17C07C45/64
CPCC07C29/136C07C45/64C07C31/202C07C31/205C07C49/17
Inventor 孙予罕魏伟孔令照朱春春苗改汪靓李晋平孙志强王东飞
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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