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Preparation method of 1,2-propane diamine

A technology of propylene diamine and isopropanolamine, applied in 1 field, can solve the problems of high cost of raw materials, backward technology and high pressure, and achieve the effects of reducing investment and production efficiency, simplifying process steps, and no pollution discharge.

Inactive Publication Date: 2010-11-24
张家港市大伟助剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Mainly imported by foreign companies such as BASF, the price is expensive
At present, the market demand for 1,2-propanediamine in the Chinese market is 1,000-2,000 tons per year, but there are few manufacturers in China who produce and the technology is backward, and the product quality is not high. The current traditional technology is to use 1,2-dichloropropane Ammonolysis production, the method yield is low, and organochlorine compounds seriously pollute the environment
It is also reported that acrylonitrile is synthesized abroad, but the pressure of this method is high and the cost of raw materials is expensive.

Method used

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  • Preparation method of 1,2-propane diamine
  • Preparation method of 1,2-propane diamine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 150g of one isopropanolamine, 150g of deionized water, Cu-Co / Al 2 o 3 Add 1.5 g of the catalyst into a 1L autoclave, replace with nitrogen and hydrogen respectively, then feed 150 g of anhydrous liquid ammonia, then feed 0.5 Mpa hydrogen, start stirring, raise the temperature to 180°C and keep it for 8 hours. Cool down and vent to normal pressure, discharge the material, filter the catalyst, and rectify the clear liquid to obtain 119g of the product.

Embodiment 2

[0029] Weigh 150g of isopropanolamine, 150g of deionized water, 1.5g of Cu-Co / diatomaceous earth catalyst into a 1L autoclave, replace with nitrogen and hydrogen respectively, and then introduce 170g of anhydrous liquid ammonia, and then introduce 1.0 Mpa hydrogen, start stirring, raise the temperature to 150°C and keep it for 6 hours. Cool down and vent to normal pressure, discharge the material, filter the catalyst, and rectify the clear liquid to obtain 114g of the product.

Embodiment 3

[0031] Weigh 150g of one isopropanolamine, 150g of deionized water, Cu-Co / Al 2 o 3 - Add 1.5 g of diatomite catalyst into a 1L autoclave, replace with nitrogen and hydrogen respectively, then feed 160 g of anhydrous liquid ammonia, then feed 0.5Mpa hydrogen, start stirring, raise the temperature to 170°C and keep it for 6 hours. Cool down and vent to normal pressure, discharge the material, filter the catalyst, and rectify the clear liquid to obtain 121g of the product.

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PUM

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Abstract

The invention discloses a preparation method of 1,2-propane diamine, belonging to the technical field of chemical synthesis. The preparation method mainly comprises the following steps: adding monoisopropanolamine, water, ammonia, hydrogen and catalyst into a high-pressure reaction kettle, stirring at a high speed, performing the catalytic amination at 100-250 DEG C under a pressure of 5-15 MPa to obtain a mixture using 1,2-propane diamine as the main component, and finally rectifying to obtain 1,2-propane diamine, wherein the selectivity of the product is greater than 80%, and the purity of the product is greater than 99%. The method has the advantages of safety, environmental protection, simple operation, high conversion rate, low energy consumption, low raw material consumption and lowproduction cost.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis and relates to a preparation method of 1,2-propanediamine. Background technique [0002] 1,2-Propylenediamine is an organic chemical intermediate and raw material with a wide range of uses. It is mainly used as an intermediate in the production of medicines, pesticides, rubber additives, lubricating oil rust inhibitors, etc. The main uses are: [0003] 1. Used in the production of propylenediaminetetraacetic acid, which is mainly used in medicine; [0004] 2. Used in the production of anticancer drug dextropropanimine; [0005] 3. Used in the production of rubber vulcanization accelerators; the reaction of propylene diamine and carbon disulfide can produce rubber vulcanization accelerators. [0006] 4. Used in the production of lubricating oil additives; propylenediamine reacts with salicylaldehyde to form a lubricating oil rust inhibitor. [0007] 5. Used in the production of benefi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/11C07C209/16B01J23/75
Inventor 黄德周谌建新陈松林龚卫良
Owner 张家港市大伟助剂有限公司
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