Device and method for separating waste sulfuric acid nitro compound

A technology for nitro compounds and waste sulfuric acid, applied in the chemical industry, can solve the problems of waste of nitro compounds, environmental pollution, and high toxicity of acidic wastewater, and achieve the effects of reducing biological toxicity, reducing environmental pollution, and reducing environmental risks

Active Publication Date: 2019-08-27
HUBEI DONGFANG CHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the present invention proposes a device and method for separating nitro compounds in waste sulfuric acid, which solve...

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  • Device and method for separating waste sulfuric acid nitro compound

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Embodiment Construction

[0024] The following examples are presented to illustrate certain embodiments of the invention and should not be construed as limiting the scope of the invention. The content disclosed in the present invention can be improved simultaneously from materials, methods and reaction conditions, and all these improvements should fall within the spirit and scope of the present invention.

[0025] like figure 1 A device for separating waste sulfuric acid nitro compounds is shown, including a waste acid tank 1 and a separator 2 located on one side of the waste acid tank 1, and the upper left part of the waste acid tank 1 communicates with waste acid / nitro compounds Feed pipe 20, the lower left side of the waste acid tank 1 is connected to the waste acid discharge pipe 21, the upper right part of the waste acid tank 1 is connected with the dispersion pipe 19 on the upper left part of the separator 2 through the nitro compound pipeline 5, and the waste acid Acid Tank 1 The nitro compound...

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Abstract

The invention relates to a device and method for separating a waste sulfuric acid nitro compound. The device comprises a waste acid tank, wherein the left upper portion of the waste acid tank is communicated with a waste acid/nitro compound feeding pipe, the right upper portion of the waste acid tank is connected with a dispersion pipe on a separator through a nitro compound pipeline, the top of the separator is connected to a liquid ring vacuum pump through an exhaust pipe, and inlet and outlet pipelines of the liquid ring vacuum pump are connected through a return valve. The left side of theseparator is connected with a mononitrotoluene pump through a mononitrotoluene discharging pipe I, a transfer tank and a mononitrotoluene discharging pipe II which are sequentially connected, an output of the mononitrotoluene pump is communicated with a DNT tank, the right side of the separator is provided with a sight glass, and the bottom of the separator is connected with a polymer dischargingpipe. By adopting the device and the method for separating the waste sulfuric acid nitro compound, the separation of mononitrotoluene and a polymer can be achieved, the toxicity in acidic wastewateris reduced, the recovered mononitrotoluene is reused to generate economic benefits, and the environmental protection risk is reduced.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a device and method for separating waste sulfuric acid nitro compounds. Background technique [0002] Before the trinitrotoluene waste sulfuric acid is processed, the free nitro compounds therein need to be separated, and the main components of the nitro compounds are mononitrotoluene (accounting for 70%-80%), a small amount of dinitrotoluene, three Nitrotoluene and polymers (polymers are complex derivatives of polynitrotoluene, accounting for about 20%-30%), the proportion of waste sulfuric acid is generally 1.60-1.63; the proportion of nitro compounds is generally 1.18-1.20, two Nitrotoluene and trinitrotoluene are dissolved in mononitrotoluene (MNT); the polymer is insoluble in waste acid and mononitrotoluene, and the specific gravity of the polymer (1.19-1.2) is similar to that of mononitrotoluene (1.16-1.18) , slightly higher than the specific gravity of mononitrotoluene, a...

Claims

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Application Information

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IPC IPC(8): B01D17/025B01D17/032C07C201/16C07C205/06
CPCB01D17/0208B01D17/0214C07C201/16C07C205/06Y02P20/10
Inventor 朱学明向雷陈云
Owner HUBEI DONGFANG CHEM IND
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