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Method for synthesizing butanol

A technology for n-butanol and butylene oxide, applied in the field of synthesizing n-butanol, can solve the problems of complex process and high cost of n-butanol, and achieve the effects of simple process, good economic benefit and reduced process cost.

Active Publication Date: 2008-03-12
HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the current synthesis method of n-butanol is costly, and the production is carried out in multiple steps, and the process is relatively complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Load 4.5 mL of supported Ni catalyst into the fixed-bed reactor and keep H 2 : The molar ratio of 1,2-epoxybutane is 5: 1,1,2-epoxybutane is injected into the reactor and mixed with hydrogen through an advection pump, and the mixture is contacted with a supported nickel catalyst to obtain n-butylene alcohol. Reaction conditions: reaction temperature 50°C, reaction pressure 1MPa, reaction bed liquid weight space velocity 0.5h -1 . The obtained product was analyzed by GC / MS, and the conversion rate of 1,2-epoxybutane was 93.45%, and the selectivity of n-butanol was 73.29%.

Embodiment 2

[0014] Load 4.5 mL of supported Pd catalyst into the fixed-bed reactor and keep H 2 The molar ratio of :1,2-butylene oxide is 10:1. Reaction conditions: reaction temperature 160°C, reaction pressure 5MPa, reaction bed liquid weight space velocity 0.1h -1 . Other steps are the same as in Example 1. The obtained product was analyzed by GC / MS, and the conversion rate of 1,2-epoxybutane was 90.59%, and the selectivity of n-butanol was 70.20%.

Embodiment 3

[0016] Load 4.5 mL of supported Pt catalyst into the fixed-bed reactor and keep H 2 The molar ratio of :1,2-butylene oxide is 10:1. Reaction conditions: reaction temperature 160°C, reaction pressure 5MPa, reaction bed liquid weight space velocity 1.0h -1 . Other steps are the same as in Example 1. The obtained product was analyzed by GC / MS, and the conversion rate of 1,2-epoxybutane was 90.03%, and the selectivity of n-butanol was 71.17%.

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PUM

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Abstract

The present invention discloses a method for synthesizing n-butanol; hydrogen and 1,2 epoxy butane with the molar ratio of (2-20):1 are added into a reactor provided with a catalyzer; 1,2 epoxy butane is catalyzed and hydrogenated to prepare n-butanol. The reaction condition is that: the reaction temperature is 50-200 DEG C; the reaction pressure is 1-10 MPa; the liquid weight speed of the reaction bed is 0.1-3.0h-1. The present invention is with simple flow without pollution. The conversion ratio for 1,2 epoxy butane can reach up to 90 percent; the selectivity for the finished n-butanol reaches up to 70 percent. According to the actual situation, the process can be continual as well as intermittent.

Description

1. Technical field [0001] The invention relates to a method for synthesizing n-butanol, in particular to a method for synthesizing n-butanol in one step from 1,2-epoxybutane. 2. Background technology [0002] N-butanol is widely used in the chemical industry and is an important organic chemical raw material, mainly used in the production of n-butyl phthalate, aliphatic dibasic acid ester, butyl phosphate, butyl acrylate, ester acid Butyl ester, etc.; also widely used in the plastic industry, organic synthesis, pesticides, medicine and coatings; in addition, n-butanol is also widely used as a solvent, dewaxing agent, etc. [0003] There are three main production processes of n-butanol: ①Fermentation method: ferment cereals, dried potatoes, etc., the fermentation liquid contains ethanol, butanol, and acetone, and n-butanol can be obtained after rectification and separation. ②Acetaldehyde condensation method: Using ethylene as raw material, acetaldehyde is synthesized and crot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/12C07C29/132
Inventor 李华王伟李庆华林榕伟佘喜春易娇刘呈立
Owner HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD