Catalyst for preparing isopropamide by aminating acetone as well as preparation method and application thereof

A technology for the production of isopropylamine and catalysts by acetone ammoniation, which is applied in the preparation of amino compounds, organic compounds, physical/chemical process catalysts, etc. It can solve the problems of poor selectivity and low conversion rate, and achieve high repeatability and high conversion The effect of high efficiency and simple preparation steps

Active Publication Date: 2010-09-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of low conversion rate and poor selectivity in the existing isopropylamine catalyst, the present invention has carried out in-depth and meticulous research, and found through research that the nickel particles of the active component loaded on the catalyst are thinner, and the particle size distribution is more uniform. Can significantly improve the conversion and selectivity of the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]Calculate and weigh a certain amount of nickel nitrate dissolved in water to prepare a solution according to the active component content of the load. The volume of the solution is equal to the volume of the liquid absorbed by the alumina carrier. The alumina carrier is impregnated by an equal volume impregnation method (by Beijing Chemical Industry Research Institute). Production) 1-2 hours, drying at 120°C for 2-4 hours. Next, the saturated aqueous solution of ammonium bicarbonate is impregnated to obtain alumina supporting 5-20 wt% nickel. The active component nickel can be impregnated in steps. The above catalyst is loaded into the reactor and reduced by introducing hydrogen at 200-500° C. for 8-10 hours to obtain the isopropylamine catalysts A-1, A-2 and A-3 of the present invention. The specific data of catalysts A-1, A-2 and A-3 are listed in Table 1.

Embodiment 2～6

[0047] Examples 2 to 6 evaluated catalysts A-1, A-2, A-3, B-1 and B-2, respectively.

[0048] The catalyst was evaluated using a fixed bed reactor. The amount of catalyst used for each evaluation was 50 ml. The starting materials and reaction products were analyzed using an Agilent 6890A gas chromatograph.

[0049] Using acetone as raw material, the reaction conditions are: normal pressure, reaction temperature of 110 °C, and volumetric space velocity of acetone solution of 0.5 h. -1 , Acetone: H 2 :NH 3 Molar ratio 1:3:3, under this reaction condition, carry out hydroamination reaction to produce isopropylamine, and the evaluation result is listed in Table 2.

[0050] Table 2 Catalyst evaluation results

[0051] catalyst

[0052] As can be seen from the data in Table 2, the catalyst of the present invention compared with the existing catalyst, the acetone conversion rate is high catalytic activity, the selectivity to isopropylamine is the high selectivity of th...

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Abstract

The invention discloses a catalyst for preparing isopropamide by aminating acetone as well as a preparation method and application thereof. In order to solve the problems of low conversion rate and selectivity of the traditional isopropamide catalyst, an active component nickel is loaded on an alumina carrier by adopting an in-situ sedimentation method, the content of the nickel is 5-25 by mass percent, and the nickel exists in an amorphous state or a nickel grain is less than 5 nm; and the BET specific surface area of the prepared catalyst is 100-210 m<2> / g. The invention provides the preparation method and the application of the catalyst, has simple preparation method, easy operation and reliable repeatability; and in addition, the catalyst has better acetone conversion rate, selectivity and stability.

Description

technical field [0001] The invention relates to a catalyst for synthesizing aliphatic amine and a preparation method and application thereof, in particular to a catalyst suitable for acetone amination to produce isopropylamine, a preparation method and application thereof. Background technique [0002] In the chemical industry, amine compounds include primary amines, secondary amines, and tertiary amines, which are widely used in pesticides, dyes, medicine and other fields. They are usually prepared by hydroamination of alcohols and corresponding aldehydes and ketones in the presence of hydrogen and catalysts. The mechanism of the hydroamination reaction can be divided into three steps: in the first step, the raw alcohol is dehydrogenated to form an aldehyde or ketone; in the second step, the aldehyde or ketone is added to ammonia to form an imine; in the third step, the imine is further hydrogenated to form an amine . [0003] U.S. Patent US 2363721 discloses a method for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C07C209/26C07C209/16C07C211/06
Inventor 田保亮唐国旗戴伟李宝芹张桂英张齐
Owner CHINA PETROLEUM & CHEM CORP
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