Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of extraction method and extraction agent used in the denitrification process in H acid production process

An extraction agent and extraction technology, which are applied in the direction of liquid solution solvent extraction, etc., can solve the problems of difficulty in stratification, low extraction rate, and the cost of regeneration and utilization of the phase-entrained extractant, and achieve easy stratification, high extraction rate, and simple extraction method. easy effect

Active Publication Date: 2019-10-15
湖北丽康源化工有限公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides an extraction method and an extractant for the denitrification process in the H-acid production process, wherein by fully combining the characteristics of the out-of-stock products in the out-of-stock process of the H-acid production process, the out-of-stock 2-Ethylhexyl Phosphate 2-Ethylhexyl Phosphate was used as co-solvent, with solvent and diluent, to extract the organic phase 8-nitro-1.3.6-naphthalene tri Sulphonic acid, so that it can be separated from the inorganic acid dilute sulfuric acid in the denitrification product, provides a practical method for the clean production of H acid and the recycling of resources, thereby solving the problem of low extraction rate of the existing H acid denitrification process extraction technology, Technical problems such as difficult separation after extraction, phase entrainment phenomenon and high cost of extraction agent recycling

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of extraction method and extraction agent used in the denitrification process in H acid production process
  • A kind of extraction method and extraction agent used in the denitrification process in H acid production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The high-efficiency extractant is made by mixing 1500ml of trioctylamine, 4000ml of sulfonated kerosene and 500ml of 2-ethylhexyl 2-ethylhexylphosphate ternary component, and the mixing volume ratio is 1.5:4:0.5.

[0051] Using the above-mentioned high-efficiency extractant to extract the H acid denitrification, the specific steps are:

[0052] 1) According to the existing H acid process sulfonation, continuous nitration and denitrification to obtain denitrification products containing 8-nitro-1.3.6-naphthalenetrisulfonic acid and a large amount of inorganic acids, the pH of the denitrification products is 2.

[0053] 2) Transfer 12,000ml of the denitrated product from step 1) into the extraction container, then add the high-efficiency extractant compounded above, start stirring, and stir for 10 minutes at a speed of 30 rpm and a temperature of 45°C.

[0054] 3), the mixed material obtained in step 2) is left to stand for 40 minutes, the upper layer is the organic phase...

Embodiment 2

[0068] The high-efficiency extractant is mixed with 1500ml of trioctylamine, 3000ml of sulfonated kerosene and 200ml of 2-ethylhexyl 2-ethylhexylphosphate ternary component, and the mixing volume ratio is 1.5:4:0.5.

[0069] Using the above-mentioned high-efficiency extractant to extract the H acid denitrification, the specific steps are:

[0070] 1) According to the existing H acid process sulfonation, continuous nitration and denitrification to obtain denitrification products containing 8-nitro-1.3.6-naphthalenetrisulfonic acid and a large amount of inorganic acids, the pH of the denitrification products is 2.

[0071] 2) Transfer 4700ml of the denitrated product from step 1) into the extraction container, then add the high-efficiency extractant compounded above, start stirring, and stir for 10 minutes at a speed of 30 rpm and a temperature of 45°C.

[0072] 3), the mixed material obtained in step 2) is left to stand for 40 minutes, the upper layer is the organic phase, and ...

Embodiment 3

[0077] The high-efficiency extractant is mixed with 1500ml of trioctylamine, 5000ml of sulfonated kerosene and 800ml of 2-ethylhexyl 2-ethylhexylphosphate ternary component, and the mixing volume ratio is 1.5:4:0.5.

[0078] Using the above-mentioned high-efficiency extractant to extract the H acid denitrification, the specific steps are:

[0079] 1), according to the existing H acid process sulfonation, continuous nitration and denitrification to obtain the denitrification product containing 8-nitro-1.3.6-naphthalene trisulfonic acid and a large amount of inorganic acid, the pH of the denitrification product is 2.5.

[0080] 2) Transfer 36,500ml of the denitrated product from step 1) into the extraction container, then add the high-efficiency extractant compounded above, start stirring, and stir for 10 minutes at a speed of 30 rpm and a temperature of 45°C.

[0081] 3), the mixed material obtained in step 2) is left to stand for 40 minutes, the upper layer is the organic phase,...

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

An extraction method and an extractant for a denitration process in a H acid production process. First, an extractant is formulated. The extractant comprises a solvent, a diluent, and a cosolvent. The cosolvent is 2-ethylhexyl 2-ethylhexyl phosphate, the solvent is a tertiary amine solvent, and the diluent is one or more of sulfonated kerosene, benzene, or toluene. Subsequently, the extractant is used to extract a denitrate, and a complex layer and an inorganic acid / water layer are formed after extraction. The inorganic acid / water layer is separated and subsequently applied to an H acid segregation step, the complex layer is stripped, a stripping agent is added for stripping to form an organic substance / water phase having a pH of 7-9. The denitrate forms a trisodium salt, the solution is stratified by standing, an organic layer is separated, and a solvent layer is subsequently applied.

Description

technical field [0001] The invention belongs to the technical field of organic chemical industry, and more specifically relates to an extraction method and an extraction agent used in the denitrification process in the production process of H acid. Background technique [0002] H acid is an important intermediate in the chemical industry of naphthalene dyes, mainly used in the production of acidic, direct and reactive dyes, such as acid magenta 6B, acid scarlet G, acid black 10B, direct black, reactive brilliant red K-2BP, reactive violet K There are more than 90 kinds of dyes, such as -3R, reactive blue K-R, etc. These dyes are used for dyeing woolen and cotton fabrics. [0003] At present, the domestic traditional process produces 8-10 tons of T acid separation mother liquor per ton of H acid product, its COD is 50000mg / L, and thiamine is about 235g / L, which belongs to high COD and high salt content, and it is difficult to carry out conventional biochemical treatment. The...

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): B01D11/04
Inventor 魏铁明黄胜勇胡火炬
Owner 湖北丽康源化工有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com