Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for extracting polynitrotoluene from nitrotoluene acidic waste water

A technology of nitrotoluene and acidic wastewater, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as danger and manual cleaning

Active Publication Date: 2021-09-14
HUBEI DONGFANG CHEM IND
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the solid form of dinitrotoluene and its derivatives in the sedimentation tank, manual cleaning is required, and the cleaning operation has certain dangers

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with specific examples, and the implementation scope of the present invention is not limited thereto.

[0022] The method for extracting polynitrotoluene from nitrotoluene acidic wastewater in this embodiment uses a delivery pump to mix and transport mononitrotoluene, acidic wastewater, mixed nitrates in the collection tank, and refluxed emulsified acidic water to the cooler. Lower the temperature twice to lower the liquid temperature to below 20°C. Acidic wastewater includes high-temperature acidic wastewater and low-temperature acidic wastewater produced by vacuum concentration. Then the liquid is separated once to obtain mixed nitrates and acidic water. The acidic water is obtained through secondary separation. Mix nitrates, clarified acidic water, emulsified acidic water, clarified acidic water flows into the wastewater treatment system for treatment, emulsified acidic water is sent back t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of nitrotoluene preparation, in particular to a method for extracting polynitrotoluene from nitrotoluene acid waste water, using a delivery pump to transport mononitrotoluene, acid waste water, mixed nitrates in a collection tank, and backflow The emulsified acidic water is mixed and transported to the cooler for twice cooling, and then the liquid is separated once to obtain mixed nitrates and acidic water, and the acidic water is separated twice to obtain mixed nitrated compounds, clarified acidic water, emulsified acidic water, and clarified acidic water It flows into the wastewater treatment system for treatment, and the emulsified acidic water is sent back to the delivery pump. The primary separation is gravity sedimentation separation, and the secondary separation is gravity sedimentation separation after filtration. The mixed nitrates obtained from the primary separation and secondary separation are stored in the collection tank. Part of the mixed nitrates are transported to the delivery pump, and other mixed nitrates are extracted polynitrotoluene products. The invention reduces the content of nitro compounds in the waste water, and is economical, environmentally friendly, safe and convenient.

Description

technical field [0001] The invention relates to the technical field of nitrotoluene preparation, in particular to a method for extracting polynitrotoluene from nitrotoluene acidic wastewater. Background technique [0002] Nitrotoluene is one of the ingredients of commonly used explosives. Explosive companies produce a large amount of acidic wastewater containing nitrotoluene and sulfuric acid in the daily nitration production. The nitrotoluene compounds include mononitrotoluene, dinitrotoluene, and trinitrotoluene. , dinitrotoluene and trinitrotoluene are high in content, and all three are toxic and difficult to biodegrade, so they have certain difficulties in wastewater treatment. [0003] At present, the main domestic nitrotoluene wastewater treatment methods include chlorine dioxide oxidation and catalytic oxidation, micro-electrolysis, oxidation, anaerobic, aerobic biochemical treatment, incineration treatment, and vacuum concentration treatment. Among them, QVF vacuum c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07C201/16C07C205/06
CPCC07C201/16C07C205/06
Inventor 朱学明胡伟梅新成朱习强段川
Owner HUBEI DONGFANG CHEM IND