Method for preparing n-pentene by n-amyl alcohol dehydration

A technology of n-pentanol and pentene, which is applied in the field of preparation of n-pentene, can solve the problems of little introduction of n-pentene technology, and achieve the effect of good reaction performance

Active Publication Date: 2017-06-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Existing literature has little introduction on the technology of n-butanol dehydration to n-pentene

Method used

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  • Method for preparing n-pentene by n-amyl alcohol dehydration
  • Method for preparing n-pentene by n-amyl alcohol dehydration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 500 grams of pseudo-boehmite, 200 grams of cellulose methyl ether and 24 grams of sesame powder in a kneader and knead for 30 minutes, add 500 ml of 5% nitric acid solution, knead for another 10 minutes, and then extrude into a strip at 110°C After drying for 10 hours, it was activated in a muffle furnace at 650°C for 8 hours to obtain catalyst A. The physical properties of the catalyst are shown in Table 1. The catalyst performance evaluation test was carried out on a fixed-bed tubular reactor (Ф25×500 mm stainless steel) with a catalyst loading capacity of 10 ml. The experimental conditions and reaction results are shown in Table 2.

Embodiment 2

[0027] Weigh 300 grams of aluminum hydroxide, 150 grams of polyethylene glycol (4000), and 15 grams of sesame powder. Knead in a kneader for 30 minutes, add 200 ml of 5% nitric acid solution, knead for another 15 minutes, and then extrude to form 120 It was dried at ℃ for 8 hours, and then activated in a muffle furnace at 600 ℃ for 10 hours to obtain catalyst B. The physical properties of the catalyst are shown in Table 1. The catalyst performance evaluation test was carried out on a fixed-bed tubular reactor (Ф25×500 mm stainless steel) with a catalyst loading capacity of 10 ml. The experimental conditions and reaction results are shown in Table 2.

Embodiment 3

[0029] Weigh 200 grams of boehmite, 150 grams of polyoxyethylene, and 10 grams of sesame powder. Knead in a kneader for 30 minutes, add 200 ml of 5% nitric acid solution, knead for another 25 minutes, and then extrude and dry at 110°C for 15 minutes. Then, it was activated in a muffle furnace at 500°C for 6 hours to obtain catalyst C. The physical properties of the catalyst are shown in Table 1. The catalyst performance evaluation test was carried out on a fixed-bed tubular reactor (Ф25×500 mm stainless steel) with a catalyst loading capacity of 10 ml. The experimental conditions and reaction results are shown in Table 2.

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Abstract

The invention relates to a method for preparing n-pentene by n-amyl alcohol dehydration. The method comprises the steps of taking n-amyl alcohol as a raw material, contacting the raw material with a catalyst, and performing a reaction to generate n-pentene, wherein the catalyst is alumina; the total pore volume of the catalyst is 0.7-1.2cm<3> / g; the pore volume with the pore diameter less than 10nm accounts for 10-50% of the total pore volume; the pore volume with the pore diameter greater than 10nm accounts for 50-90% of the total pore volume. The method can be used in industrial production of n-pentene prepared by the n-amyl alcohol dehydration.

Description

Technical field [0001] The present invention relates to a preparation method of n-pentene, in particular to a method for preparing n-pentene by dehydrating n-pentanol. Background technique [0002] N-pentene is a colorless and volatile liquid. It is soluble in ethanol but insoluble in water. It is a high value-added fine chemical intermediate. It is used in the production of pesticide propazoline intermediates, and oxo synthesis to produce n-hexanal, N-hexanol, n-hexanoic acid, and used for polymer material modification. N-pentene can be produced by dehydration of n-pentanol under the action of a catalyst. [0003] Patent CN101492333A discloses a method for dehydrating alcohols to olefins, which includes contacting alcohol raw materials with a catalyst, wherein the catalyst used includes the following components in weight percentage: a) 30-90% silicon-aluminum molar ratio Si / Al is less than 100 UFI zeolite; b) The balance of alumina. For the dehydration of 3-methyl-1-butanol to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/10C07C1/24B01J23/04B01J35/10
Inventor 金照生吕建刚徐菁孙兰萍黄祖娟金萍周海春
Owner CHINA PETROLEUM & CHEM CORP
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