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Production method of isopropylamine

A technology of isopropylamine and acetone, which is applied in the field of isopropylamine production, can solve the problems of unsatisfactory selectivity of isopropylamine, difficult operation of rectification system, increased production cost, etc., and achieves the effect of simple and feasible method, considerable economic benefits and easy operation

Active Publication Date: 2013-12-04
ZHEJIANG XINHUA CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But because the reactor adopts single-stage control, it is suitable for the hydroamination reaction of acetone, and the reaction temperature is still relatively low for the reaction of diisopropylamine to produce isopropylamine, so the diisopropylamine that circulates back can not be ideally converted into isopropylamine, thereby The concentration of diisopropylamine in the production unit is getting higher and higher, that is, there is accumulation. At least it is necessary to periodically open the rectification system for separating diisopropylamine to reduce the concentration of diisopropylamine in the system, but the separation of diisopropylamine is Using the principle of diisopropylamine, isopropanol and water to form a ternary azeotrope, the operation of the rectification system for separating diisopropylamine is very difficult, and it is easy to cause a pan tower, thereby increasing the production cost
[0006] In summary, there is the problem that the selectivity of generating Isopropylamine is not ideal in the existing Isopropylamine industrial production plant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The fixed bed reactor is a 32×3mm stainless steel reactor with a length of 1350mm. A stainless steel temperature measuring sleeve of ∮8×1mm is installed in the reactor, and the brand produced by Beijing Research Institute of Chemical Industry is BC-A-30 spherical isopropylamine catalyst and the brand produced by Zhejiang Xinhua Chemical Co., Ltd. It is XH-3 strip catalyst, the total catalyst loading height is 960mm, among which the spherical catalyst loading height is 270mm, the strip catalyst loading height is 690mm, and the catalyst loading volume is 510ml. The reaction raw materials are top-in and bottom-out. The material flowing out from the bottom of the reactor enters the separator after being condensed and cooled. The gas phase ammonia and hydrogen are discharged from the top of the separator, and the liquid phase at the bottom is sampled regularly.

[0024] The reaction temperature is 105° C., the reaction pressure is 0.8 MPa, the liquid space velocity of aceton...

Embodiment 2

[0026] The fixed bed reactor is a 32×3mm stainless steel reactor with a length of 1350mm. A stainless steel temperature measuring sleeve of ∮8×1mm is installed in the reactor, and the brand produced by Beijing Research Institute of Chemical Industry is BC-A-30 spherical isopropylamine catalyst and the brand produced by Zhejiang Xinhua Chemical Co., Ltd. It is XH-3 strip catalyst, the total catalyst loading height is 960mm, among which the spherical catalyst loading height is 305mm, the strip catalyst loading height is 655mm, and the catalyst loading volume is 510ml. The reaction raw materials are top-in and bottom-out. The material flowing out from the bottom of the reactor enters the separator after being condensed and cooled. The gas phase ammonia and hydrogen are discharged from the top of the separator, and the liquid phase at the bottom is sampled regularly.

[0027] The reaction temperature is 105° C., the reaction pressure is 0.8 MPa, the liquid space velocity of aceton...

Embodiment 3

[0029] The catalyst packing method of embodiment 3-5 is as embodiment 2.

[0030] The reaction temperature is 115° C., the reaction pressure is 1.0 MPa, the liquid space velocity of acetone is 0.7 L acetone / (L catalyst·hour), and the molar ratio of acetone:hydrogen:ammonia is 1:3:3. Reaction result: the conversion rate of acetone is 100%, the selectivity of isopropylamine is 98.6%, the selectivity of diisopropylamine is about 1.0%, and the selectivity of isopropanol is about 0.4%.

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Abstract

The invention relates to a production method of isopropylamine, and puts forward that: segmentally loading a fixed bed reactor with catalysts of different properties, loading an entrance end with a spherical nickel-base catalyst of moderate activity, loading an outlet end with a strip-type nickel-based catalyst of higher activity, under suitable reaction conditions, performing an hydrogen ammoniation reaction of acetone to produce the isopropylamine, and thus obtaining a isopropylamine product via necessary separation and refining. Through use of the production method of the isopropylamine, circulation of diisopropylamine and isopropyl alcohol can be avoided, energy consumption can be reduced, and a diisopropylamine distillation system inconvenient to operate can be omitted; and the production method of the isopropylamine is simple, feasible and easy to implement, and has considerable industrial application value and economic benefit.

Description

technical field [0001] The present invention relates to a kind of method of producing amine, more particularly, the present invention relates to a kind of method of producing isopropylamine. technical background [0002] Isopropylamine is an important raw material for the production of various pesticides such as atrazine, isofenphos-methyl and buprofezin; it can also be used for the production of detergents such as isopropylamine dodecylbenzenesulfonate; in the rubber industry and It is also widely used in the pharmaceutical industry. [0003] People have done a lot of research on the production methods of isopropylamine, and some of them have been maturely applied in industry. Among them mainly include: (1) isopropanol gas-phase ammoniation method, this method uses isopropanol as raw material, in the presence of copper, nickel or cobalt catalyst, isopropanol and ammonia react under the condition of hydrogen to generate isopropylamine, such as the United States Patents No....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/06C07C209/26C07C21/10C07C29/145
Inventor 兰昭洪王卫明包江峰徐利红应民军赵建标吴锦平王东岳王晓明李道全吴建仲邵卫平朱玉成贾建红邵建强张绍志
Owner ZHEJIANG XINHUA CHEM
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