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Method for preparing aminonitrile organic matter by gas phase method

A technology of aminonitriles and organics, which is applied in the field of preparation of aminonitriles organics by gas phase method, can solve the problems of low molar ratio of organic amides, high conversion rate of organic amides, high selectivity of aminonitriles organics, etc., and achieve high conversion rate of organic amides, The effect of improving the purity and selectivity of high amino nitrile organic substances

Active Publication Date: 2021-11-02
JIANGSU YANGNONG CHEM GROUP
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  • Claims
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AI Technical Summary

Problems solved by technology

[0008] In view of the problems existing in the prior art, the present invention provides a method for preparing aminonitrile organics by a gas phase method, the method reduces the hot spot temperature rise of the catalyst through the gas phase method of classification, and feeds organic amides in stages to solve the problem of existing problems. Ammonia gas present in the process of preparing amino nitrile organics by gas phase method: low molar ratio of organic amide, high conversion rate of organic amide and high selectivity of amino nitrile organics are difficult to balance; and the combination of refining and adsorption purification , significantly improved the purity of amino nitrile organic products, and improved the economic benefits of industrialized preparation of amino nitrile organic compounds

Method used

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  • Method for preparing aminonitrile organic matter by gas phase method
  • Method for preparing aminonitrile organic matter by gas phase method
  • Method for preparing aminonitrile organic matter by gas phase method

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preparation example Construction

[0174] The preparation method of catalyst A1 is carried out according to CN111659463A, except that in the molding step, a mold matching with catalyst A1 is used for molding to form catalyst A1 with a specific structure, other preparation methods are carried out according to CN111659463A.

[0175] Catalyst A2 to Catalyst A4 have the same structure and preparation method as Catalyst A1, except that the molar ratios of silicon, aluminum and phosphorus are 1:0.8:0.4, 1:0.8:0.8 and 1:0.8:1.6.

[0176] Catalyst B1

[0177] Catalyst B1 is a clover-shaped cylindrical catalyst, which includes a cylindrical body 1 and a protrusion 2, wherein the height of the cylinder is 4.5mm, and the lobes outside the clover circle intersection are the protrusions 2 , specifically as figure 1 As shown, the inside of the dotted line is marked as the main part of the catalyst, and the part outside the dotted circle is marked as the protrusion 2. The diameter of the dotted circle is 3mm, and a marked in...

Embodiment 1

[0202] The present embodiment provides a method for preparing 6-aminocapronitrile by a gas phase method, said method comprising the steps of:

[0203] (1') trimethyl phosphate (accounting for ammonia weight 10ppm) is mixed with ammonia and carried out preheating treatment at 500 DEG C to make ammonia superheated to obtain mixed gas.

[0204](2') The mixed gas and the i-th part of the organic amide in the liquid phase state at 120°C are mixed and gasified at 350°C in the Venturi gasification device and then passed into the first stage of the fixed-bed reactor (a total of 4 in series) The fixed-bed reactor is counted as 4 sections of fixed-bed reactors, and the catalyst of the same weight is filled in each section of fixed-bed reactor), reacts under the first reaction temperature, the first reaction pressure and the first catalyst effect, obtains the first Reaction discharge;

[0205] (3') The i-th reaction output and the i+1 part of the organic amide are passed into the i+1 se...

Embodiment 2

[0212] The present embodiment provides a method for preparing 6-aminocapronitrile by a gas phase method, said method comprising the steps of:

[0213] (1') isopropyl distearoyloxyaluminate (accounting for ammonia weight 20ppm) is mixed with ammonia and then preheated at 600°C to make ammonia superheated to obtain mixed gas.

[0214] (2') The mixed gas and the i-th part of the organic amide in the liquid phase state at 220°C are mixed and gasified at 500°C in the Venturi gasification device and then passed into the first stage of the fixed-bed reactor (a total of 4 in series) The fixed-bed reactor is counted as 4 sections of fixed-bed reactors, and the catalyst of the same weight is filled in each section of fixed-bed reactor), reacts under the first reaction temperature, the first reaction pressure and the first catalyst effect, obtains the first Reaction discharge;

[0215] (3') The i-th reaction output and the i+1 part of the organic amide are passed into the i+1 section fi...

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Abstract

The invention relates to a method for preparing an aminonitrile organic matter by a gas phase method, a graded reaction mode is adopted in the method, the hot-spot temperature rise of the catalyst is reduced, the service life of the catalyst is prolonged, and the selectivity and conversion rate of the reaction are improved; in addition, the method adopts a purification mode combining refining and adsorption, so that the purity of the 6-aminonitrile organic matter product is also remarkably improved on the basis of saving energy consumption, and the influence of impurities on downstream products is reduced.

Description

technical field [0001] The invention relates to the technical field of organic synthesis, in particular to a method for preparing aminonitrile organic compounds by a gas phase method. Background technique [0002] As an important chemical product, hexamethylenediamine is mainly used in the production of polyamides, and can also be used in the synthesis of polyurethane resins, ion exchange resins and diisocyanates, as well as curing agents and organic crosslinking agents for urea-formaldehyde resins, epoxy resins, etc. etc. It can also be used as adhesive, stabilizer, bleaching agent, anti-corrosion agent, etc. It is widely used in organic synthesis, aerospace, textile paper, metal materials and other fields. The main source of hexamethylenediamine is 6-aminocapronitrile. 6-aminocapronitrile is an important chemical intermediate that can be hydrogenated to prepare hexamethylenediamine. Therefore, the preparation of 6-aminocapronitrile has become a production line for hexameth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C255/24C07C253/00C07C253/34
CPCC07C253/00C07C253/34C07C255/24Y02P20/584
Inventor 王根林丁克鸿徐林王铖王刚吴健许越梅学赓汪洋聂庆超
Owner JIANGSU YANGNONG CHEM GROUP
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