Nitrobenzene/dinitrobenzene catalyst recovery device and recovery method thereof

Abstract

The invention discloses a nitrobenzene / dinitrobenzene catalyst recovery device and a recovery method thereof. The recovery device comprises a storage tank, a ceramic disk membrane filter connected with the storage tank, a feed pump connected between the storage tank and ceramic disk membrane filter, a crude product solution storage tank and a cleaning tank, wherein an inlet of the crude product solution storage tank is connected with a clear solution outlet of the ceramic disk membrane filter; an outlet of the crude product solution storage tank is provided with a discharge valve; the cleaning tank is connected with the ceramic disk membrane filter through a pipeline and used for cleaning the ceramic disk membrane filter; an outlet of the cleaning tank is provided with a cleaning tank discharge valve; and a cleaning tank liquidometer is arranged in the cleaning tank. The device has the advantages of simple structure, low energy consumption and low cost, and is beneficial to the separation of the catalyst and crude product solution; and the catalyst is used for cyclic utilization, and the crude product solution enters the next procedure for production.

Description

technical field

[0001] The invention relates to the recovery and utilization of catalysts in catalytic hydrogenation reactions, in particular to a recovery device for nitrobenzene and dinitrobenzene catalysts and a recovery method thereof. Background technique

[0002] The molecular formula of nitrobenzene is C7H6N2O4, the appearance is light yellow needle-like crystal, with bitter almond flavor, molecular weight 182.14, melting point 69.5°C, boiling point 300°C, slightly soluble in water, ethanol, ether, easily soluble in benzene, acetone, Relative density (water = 1) 1.52.

[0003] Dinitrobenzene is divided into m-dinitrobenzene and o-dinitrobenzene. m-dinitrobenzene is also called 1,3-dinitrobenzene, and o-dinitrobenzene is also called 1,2-dinitrobenzene. Nitrobenzene; m-dinitrobenzene is a volatile colorless solid with a melting point of 89°C and a boiling point of 301°C. It is slightly soluble in water and soluble in ethanol, ether, benzene, etc. It is a highly toxic d...

Examples

Embodiment Construction

[0029] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0030] see figure 1 As shown, the present invention discloses a catalyst recovery device for nitrobenzene and dinitrobenzene; the recovery device includes a storage tank 10, a ceramic disc membrane filter 20 connected with the storage tank 10, a connection storage tank 10 and a ceramic disc The feed pump 40 of the membrane filter 20, the crude product solution storage tank 50 connected with the ceramic disc membrane filter 20 and the cleaning tank 60 that the whole device is cleaned; the storage tank 10 is used to receive hydrogenation reactor reaction Containing the crude aniline solution of catalyst, the upper part of the storage tank is provided with a feed inlet, the feed inlet is connected with the hydrogenation reactor, the lower part is p...

technical field

[0001] The invention relates to the recovery and utilization of catalysts in catalytic hydrogenation reactions, in particular to a recovery device for nitrobenzene and dinitrobenzene catalysts and a recovery method thereof. Background technique

[0002] The molecular formula of nitrobenzene is C7H6N2O4, the appearance is light yellow needle-like crystal, with bitter almond flavor, molecular weight 182.14, melting point 69.5°C, boiling point 300°C, slightly soluble in water, ethanol, ether, easily soluble in benzene, acetone, Relative density (water = 1) 1.52.

[0003] Dinitrobenzene is divided into m-dinitrobenzene and o-dinitrobenzene. m-dinitrobenzene is also called 1,3-dinitrobenzene, and o-dinitrobenzene is also called 1,2-dinitrobenzene. Nitrobenzene; m-dinitrobenzene is a volatile colorless solid with a melting point of 89°C and a boiling point of 301°C. It is slightly soluble in water and soluble in ethanol, ether, benzene, etc. It is a highly toxic d...

Examples

Embodiment Construction

[0029] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0030] see figure 1 As shown, the present invention discloses a catalyst recovery device for nitrobenzene and dinitrobenzene; the recovery device includes a storage tank 10, a ceramic disc membrane filter 20 connected with the storage tank 10, a connection storage tank 10 and a ceramic disc The feed pump 40 of the membrane filter 20, the crude product solution storage tank 50 connected with the ceramic disc membrane filter 20 and the cleaning tank 60 that the whole device is cleaned; the storage tank 10 is used to receive hydrogenation reactor reaction Containing the crude aniline solution of catalyst, the upper part of the storage tank is provided with a feed inlet, the feed inlet is connected with the hydrogenation reactor, the lower part is p...

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