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Preparation method of n-butylamine

A production method and a technology for n-butylamine, which are applied in the field of preparation of n-butylamine, can solve the problems of good product sales, equipment shutdown, product slowdown, etc., and achieve the effects of preventing slowdown, high production efficiency, and easy operation.

Inactive Publication Date: 2018-04-17
ZHEJIANG JINJU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The n-butylamine generation reaction is a process in which raw materials are synthesized in a reactor to generate one-n-butylamine, di-n-butylamine, tri-n-butylamine and water; because a set of equipment generates three products at the same time after the reaction, The uses of the products are different, and the market conditions of the three products are also different, resulting in the sales of some products are very good, and some products are unsalable. Although the output ratio of the products can be adjusted by controlling the ratio of raw materials and the temperature of the reactor, However, it is unavoidable that some unsalable products will be produced; it will bring great pressure on product sales and product inventory, and may cause the problem of device shutdown in serious cases, and the supply of best-selling products is in short supply.

Method used

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  • Preparation method of n-butylamine
  • Preparation method of n-butylamine

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: control-n-butylamine product output

[0029] Prepare a certain proportion of n-butanol and liquid ammonia reaction materials, control the ratio of n-butanol and liquid ammonia in the reaction materials (ammonia content is controlled at 5-10%), the reaction materials are vaporized after being preheated by the preheater, and the reaction materials are Put it into the reactor, the hot spot temperature difference of the reactor is 15-25°C, the reaction pressure is 0.6-1.3MPa, the hydrogen concentration is controlled at 21-29%, and the synthesis reaction occurs in the presence of hydrogen, and it is separated after deamination and dehydrogenation A n-butylamine product is produced, and a n-butylamine product is added to the reaction material to carry out a feed-back synthesis reaction, and the remaining product is collected after dehydration and dealcoholization, and the product of the feed-back synthesis reaction is subjected to deamination, dehydrogenation, de...

Embodiment 2

[0031] Embodiment 2: control the output of di-n-butylamine product

[0032] Prepare a certain proportion of n-butanol and liquid ammonia reaction materials, control the ratio of n-butanol and liquid ammonia in the reaction materials, and vaporize the reaction materials after being preheated by the preheater, and put the reaction materials into the reactor. The reaction temperature of the reactor is The temperature is 6-13°C, the reaction pressure is 0.6-1.3MPa, the hydrogen concentration is controlled at 31-39%, and the synthesis reaction occurs in the presence of hydrogen, and di-n-butylamine is separated after deamination, dehydrogenation, dehydration and dealcoholization , the di-n-butylamine product is added to the reaction material to carry out the feed synthesis reaction, and the remaining product is collected. The product of the feed synthesis reaction is collected after deamination, dehydrogenation, dehydration and dealcoholization, and a normal Butylamine, tri-n-butyl...

Embodiment 3

[0035] The reaction pressure in embodiment 1 and embodiment 2 is changed into 0.6-1.3MPa by original 1.3-1.5MPa, and all the other steps are unchanged, and after pressure drops, tri-n-butylamine product output ratio increases, and the transformation rate of material is basically There is no decline, the device consumption is significantly reduced, and the steam consumption of the ammonia tower is greatly reduced.

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Abstract

The invention discloses a preparation method of n-butylamine. The preparation method comprises the following steps of enabling a preheater to preheat the reaction materials of liquid ammonia and n-butyl alcohol and the circulating material, and enabling a vaporizer to mix and vaporize; then, further heating to certain temperature, and generating a product mixture of mono-n-butylamine, di-n-butylamine and tri-n-butylamine through a solid catalyst at certain pressure; separating according to the different boiling points and water solubility of mono-n-butylamine, di-n-butylamine and tri-n-butylamine, and the feature that n-butylamine, water and n-butyl alcohol form binary and ternary azeotropes. The preparation method comprises the following steps of according to the generation principle of the n-butylamine, the original production technology is modified; by additionally performing the process of outputting and returning the mono-n-butylamine and di-n-butylamine products for synthesizing,the output ratio of the n-butylamine product is adjusted according to the product sales and inventory, and the reasonable output ratio of the product is realized.

Description

technical field [0001] The invention belongs to the field of n-butylamine preparation, and relates to an adjustable production method of n-butylamine, which controls the ratio of each product. Background technique [0002] The n-butylamine products are: mono-n-butylamine, di-n-butylamine, tri-n-butylamine; n-butylamine is an important chemical raw material and organic synthesis intermediate, widely used in industry, agriculture, medicine and other fields. : 1-n-butylamine: used as emulsifier, medicine, insecticide, rubber product, intermediate product and chemical reagent in the manufacture of dyes. Di-n-butylamine: used as emulsifier, corrosion inhibitor, insecticide, rubber accelerator, polymerization inhibitor, etc. Tri-n-butylamine: mainly used as solvent, intermediate, pesticide, emulsifier, etc. [0003] The n-butylamine generation reaction is a process in which raw materials are synthesized in a reactor to generate one-n-butylamine, di-n-butylamine, tri-n-butylamine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C209/16C07C211/07C07C209/52C07C209/26
CPCC07C45/002C07C209/16C07C209/26C07C209/52C07C249/02C07C211/07C07C47/02C07C251/08
Inventor 刘丽俞宏伟夏林平王俊杰方盛远严有棋
Owner ZHEJIANG JINJU CHEM
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