Method for preparing 1,2-pentanediol by furfuryl alcohol liquid phase selectivity and hydrogenolysis

A technology for pentanediol and furfuryl alcohol, applied in the field of selective hydrogenolysis of furfuryl alcohol to prepare 1,2-pentanediol, can solve the problems of industrial production limitation, large environmental pollution, poor results, etc., achieve excellent catalytic effect and reduce energy consumption , the effect of simple process

Active Publication Date: 2015-02-25
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst contains the toxic element Cr, which is highly polluting to the environment, and industrial production is greatly restricted.
In addition, in recent years, the results of hydrogenolysis of furfuryl alcohol and tetrahydrofurfuryl alcohol to 1,2-pentanediol and 1,5-pentanediol using copper chromite as a catalyst are not good (Chem. Comm., 2009, 2035-2037 , Green Chem., 2012, 14, 3402–3409)

Method used

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  • Method for preparing 1,2-pentanediol by furfuryl alcohol liquid phase selectivity and hydrogenolysis
  • Method for preparing 1,2-pentanediol by furfuryl alcohol liquid phase selectivity and hydrogenolysis
  • Method for preparing 1,2-pentanediol by furfuryl alcohol liquid phase selectivity and hydrogenolysis

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Weigh 4.83 g of copper nitrate trihydrate, 32.00 g of 20 wt% acidic silica sol and 12.00 g of urea into the autoclave, add 100 mL of distilled water, seal the autoclave, stir and heat up to 100 °C, and precipitate for 2 h. After cooling down to room temperature, it was suction-filtered, washed three times with distilled water and absolute ethanol, dried at 120 °C for 12 h, roasted in a muffle furnace at 400 °C for 3 h, pressed into tablets, ground and sieved (80-100 mesh). The sieved calcined sample was reductively activated in a hydrogen atmosphere at 300 °C for 4 h to obtain the active catalyst 1 provided by the present invention.

Embodiment 2

[0030] The operation was the same as in Example 1, except that 32.00 g of 20 wt% acidic silica sol was replaced by 3.71 g of SBA-15 molecular sieve powder, and after reduction and activation, the active catalyst 2 provided by the present invention was obtained.

Embodiment 3

[0032] The operation was the same as in Example 1, except that 32.00 g of 20 wt% acidic silica sol was replaced by 3.71 g of MCM-41 molecular sieve powder, and after reduction and activation, the active catalyst 3 provided by the present invention was obtained.

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Abstract

The invention discloses a method for preparing 1,2-pentanediol by furfuryl alcohol liquid phase selectivity and hydrogenolysis. According to the invention, a non-precious metal catalyst with environmental protection and high efficiency is selected, which concretely relates to the supported Bu-based catalyst, and then furfural is used for preparing 1,2-pentanediol with high activity and high selectivity under mild hydrogenation condition. The catalyst of the present invention uses furfuryl alcohol with high concentration even pure furfuryl alcohol as a raw material, so that energy consumption for separating a solvent can be reduced.

Description

technical field [0001] The invention relates to a method for preparing 1,2-pentanediol by selective hydrogenolysis of furfuryl alcohol. Specifically, the invention relates to a method for preparing 1,2-pentanediol by selective hydrogenolysis of furfuryl alcohol in liquid phase in the presence of a supported Cu-based chromium-free catalyst. - Pentylene glycol method. Background technique [0002] 1,2-Pentanediol is a linear diol with a dihydroxyl group at one end and a relatively long alkyl chain at the other end. It has obvious polarity and non-polarity, which makes it different from other diols. 1,2-Pentanediol is widely used around the world, mainly as a key raw material for the synthesis of the fungicide propiconazole, and is also an important raw material for the production of polyester fibers, surfactants, pharmaceuticals and other products. In addition, it is used as an excellent humectant, preservative, and solvent in various skin care products such as skin creams, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/20C07C29/132B01J23/72B01J29/76B01J29/03B01J23/80B01J23/83B01J23/825B01J23/75B01J23/755B01J23/889B01J29/48
Inventor 夏春谷黄志威陈静赵峰崔芳李雪梅
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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