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Method for producing 1,2-pentadiol in one-step hydrogenation by furaldehyde

A technology of pentanediol and furfural, which is applied in the production of 1,2-pentanediol, can solve the problems of low output, backward production technology, and high price, and achieve the effect of abundant raw material sources, obvious economic benefits, and short process flow

Inactive Publication Date: 2013-02-13
ZHUHAI KAIMEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The C5 fraction produced in the petrochemical industry is generally used as fuel, and the output of 1-pentene or other deep-processed products that can be used as raw materials after rectification and separation is very low, resulting in high raw material costs for the production of 1,2-pentanediol
The existing technology adopts multi-step reaction, and there are many types of by-products, resulting in low yield and product purity of 1,2-pentanediol, and high price; backward production technology is also an important reason affecting the development of 1,2-pentanediol, which is extremely Large restrictions on the industrial production of 1,2-pentanediol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 12.1 grams of copper nitrate and 58.7 grams of zinc nitrate into a round bottom flask with 200ml of water and stir, titrate with 15% sodium hydroxide to form a mixed colloid; heat up to 80°C, age for 4 hours, filter and wash; 120°C Drying at 600°C for 16 hours, baking at 600°C for 4 hours to form CuO / ZnO composite oxide; at 160-450°C, use hydrogen or hydrogen / nitrogen mixed gas for reduction activation for 3-18 hours. catalyst. According to the loading amount of 10ml catalyst, under the conditions of temperature 190℃, pressure 4.0MPa, and 20% furfural methanol solution, the conversion rate of furfural is 98.0%, and the selectivity of 1,2-pentanediol is 45.7%.

Embodiment 2

[0025] Add 25.4 grams of copper nitrate and 85.3 grams of aluminum nitrate into a round-bottomed flask with 286ml of water and stir, titrate with 15% sodium hydroxide to form a mixed colloid; heat up to 80°C, age for 4 hours, filter and wash; 120°C Drying at 600°C for 16 hours and roasting at 600°C for 4 hours to form CuO / AlO composite oxide; at 160-450°C, use hydrogen or hydrogen / nitrogen mixed gas for reduction activation for 3-18 hours to prepare the catalyst . According to 10ml of catalyst loading, the reaction was carried out under the conditions of temperature of 180°C, pressure of 8.0MPa, and 20% furfural methanol solution. The conversion rate of furfural was 92.0%, and the selectivity of 1,2-pentanediol was 52.2%.

Embodiment 3

[0027] Add 35.1 grams of copper nitrate and 39..8 grams of sodium silicate into a round-bottomed flask with 220ml of water and stir, titrate with 15% sodium hydroxide to form a mixed colloid; heat up to 80°C, age for 4 hours, filter, Washing; drying at 120°C for 16 hours, roasting at 600°C for 4 hours to form CuO / SiO composite oxides; at 160-450°C, use hydrogen or hydrogen / nitrogen mixed gas to reductively activate 3-18 hours to prepare the catalyst. According to 10ml of catalyst loading, the reaction was carried out under the conditions of temperature 200℃, pressure 8.0MPa, and 20% furfural methanol solution. The conversion rate of furfural was 98.0%, and the selectivity of 1,2-pentanediol was 48.0%.

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Abstract

The invention discloses and provides a method for producing 1,2-pentadiol in one-step hydrogenation by furaldehyde with wide source, low price, high development yield, simple process and small environmental contamination. The method comprises the following steps of: catalyzing furaldehyde serving as a raw material and compound oxide containing copper oxide serving as a catalyst on a continuous fixed bed; and hydrogenating to prepare the 1,2-pentadiol at a temperature of between 100 and 200 DEG C and pressure of between 4.0 and 10.0MPa, wherein the furaldehyde is high in conversion rate and the 1,2-pentadiol is high in selectivity. According to the method, the 1,2-pentadiol is produced by utilizing the renewable resource furaldehyde, the raw materials is rich in source and low in cost; a base metal is adopted as the catalytic material, so that the catalyst has low price; and the selective hydrogenation technology with short process flow, easy operation and no pollution is adopted.

Description

technical field [0001] The invention relates to a method for producing 1,2-pentanediol by one-step hydrogenation of furfural. Background technique [0002] 1,2-pentanediol is a straight-chain diol with distinct polar and non-polar ends, which is different from other diols and has multifunctionality. It is the key intermediate of propiconazole, a systemic fungicide with high efficiency, low toxicity and long duration; propiconazole has played an important role in the control of fungal damage in food crops, vegetables, fruits, etc., and has a very broad application prospect . As an excellent humectant, antibacterial agent and solubilizer, 1,2-pentanediol can effectively improve the water resistance of sunscreen cosmetics and is widely used in various daily care products. In addition, 1,2-pentanediol is also an important raw material for products such as polyester fibers, surfactants and pharmaceuticals. There are two main processes for the synthesis of 1,2-pentanediol r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/20C07C29/141B01J23/72
Inventor 崔健崔晓桐
Owner ZHUHAI KAIMEI TECH
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