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The synthetic method of isopropylamine

A synthetic method and the technology of isopropylamine are applied in the field of selective synthesis of low-carbon aliphatic amines to achieve the effects of reducing investment costs, high selectivity, and easy industrial control

Active Publication Date: 2015-11-18
ZHEJIANG JIANYE CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In summary, how to improve the selectivity of isopropylamine exists in the production of isopropylamine at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The fixed bed reactor is a stainless steel reactor with an inner diameter (diameter) of 10mm and a length of 600mm. The temperature measuring sleeve, three-stage temperature control (that is, set up 3 temperature measuring sleeves). Fill the quartz sand, mixed catalyst and quartz sand sequentially from top to bottom. 20mL of nickel-based catalyst and quartz sand were mixed uniformly according to the mass ratio of 2:1 and packed in the middle of the fixed-bed reactor as a mixed catalyst. At this time, the packing height of the mixed catalyst is about 200 mm; the aspect ratio of the packing amount of the mixed catalyst in the fixed bed reactor is 20. The quartz sand at the upper part (that is, the quartz sand at the feed end of the fixed-bed reactor, hereinafter referred to as the upper packing) has a height of about 200mm, and the quartz sand at the lower part (that is, the quartz sand at the discharge end of the fixed-bed reactor) , hereinafter referred to as the low...

Embodiment 2

[0049] Change the reaction conditions to the following:

[0050] The reaction temperature is 110°C, the reaction pressure is 0.2MPa, and the acetone liquid space velocity is 0.3h -1 , Acetone: hydrogen: the molar ratio of ammonia is 1:3:4.

[0051] All the other contents are the same as in Example 1.

[0052] Reaction result: the conversion rate of acetone is 89%, and the selectivity of isopropylamine is 100%.

Embodiment 3

[0054] Change the reaction conditions to the following:

[0055] The reaction temperature is 120°C, the reaction pressure is 0.3MPa, and the acetone liquid space velocity is 0.4h -1 , Acetone: hydrogen: the molar ratio of ammonia is 1:3:4.

[0056] All the other contents are the same as in Example 1.

[0057] Reaction result: the conversion rate of acetone is 95%, and the selectivity of isopropylamine is 100%.

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Abstract

The invention discloses a synthesis method of isopropyl amine. A preheater is arranged in front of a fixed-bed reactor, and a gas-liquid separator is arranged behind the fixed-bed reactor; a middle section of the fixed-bed reactor is filled with a mixed catalyst; acetone, hydrogen and ammonia are taken as raw materials, acetone is reduced and ammoniated into isopropyl amine, and the reaction conditions are as follows: the reaction pressure is between atmospheric pressure and 0.5MPa, the reaction temperature is 70-130 DEG C, the molar ratio of the acetone to the hydrogen to the ammonia is 1:1-4:2-6, and the liquid space velocity of acetone is 0.1-0.5h<-1>; the mixed catalyst is obtained by evenly mixing a nickel-based catalyst and quartz sand according to the mass ratio of 2:0.8-1.2. By adopting the method disclosed by the invention, the selectivity of the isopropyl amine is as high as 100%.

Description

technical field [0001] The present invention relates to a kind of selective synthesis of low carbon aliphatic amine, specifically, the present invention relates to a kind of selective synthesis of monoisopropylamine (that is, isopropylamine, monoisopropylamine). Background technique [0002] Isopropylamine is not only widely used in the production of pesticides, such as isopropylamine is an important intermediate in the production of isothion-methyl, buprofezin, atrazine, etc., but also widely used in the fine chemical industry, such as the production of detergents, Rubber and medicine etc. [0003] There are many reports in the literature on the synthesis method of isopropylamine, and some methods have been industrialized. There are mainly two categories: [0004] (1) Isopropylamine is synthesized by gas-phase ammoniation of isopropanol. This method takes isopropanol, ammonia and hydrogen as raw materials, and generally synthesizes isopropylamine under the catalyst of cob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C211/06C07C209/26
Inventor 柴凤兰董玉涛朱东方郑河清赵玉奇赵开楼李敬夏朝晖张建明余志平赵素粉王世伟
Owner ZHEJIANG JIANYE CHEM
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