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Recycling method of nigrosine mud iron

A nigrosine and iron slime technology, applied in the field of nigrosine, can solve the problems of inapplicable iron slime recovery and recovery, and achieve the effects of realizing economic benefits and environmental protection, reducing environmental pollution, and reducing product loss

Active Publication Date: 2018-05-29
青岛海湾集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different components of nigrosine iron sludge, this method is not suitable for the recovery of iron sludge produced in the production process of nigrosine and the recovery of nigrosine dye products in the iron sludge produced by nigrosine black

Method used

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  • Recycling method of nigrosine mud iron
  • Recycling method of nigrosine mud iron
  • Recycling method of nigrosine mud iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 1) Beat 50g of aniline black iron mud wet product with 400ml water for 30min;

[0058] 2) Add 62g of concentrated sulfuric acid dropwise to the beaten iron mud, heat up to 60°C, stir and react for 2h;

[0059] 3) After the reaction is over, filter while it is hot, and recover the filtrate; the filter cake is washed with about 100ml of water, dried, recovered, and used as a plastic ink product;

[0060] 4) The filtrate recovered in step 3) is used to treat the phenylpyrazolone mother liquor wastewater.

Embodiment 2

[0062] 1) Beat 46g of wet aniline black iron mud with 400ml water for 25min;

[0063] 2) Add 55.2g of concentrated sulfuric acid dropwise to the beaten iron mud, heat up to 65°C, and stir for 1.5h;

[0064] 3) After the reaction is over, filter while it is hot, and recover the filtrate; the filter cake is washed with about 100ml of water, dried, recovered, and used as a plastic ink product;

[0065] 4) The filtrate recovered in step 3) is used to treat the phenylpyrazolone mother liquor wastewater.

Embodiment 3

[0067] 1) Beat 54g of aniline black iron mud wet product (with a water content of 55%) with 400ml of water for 35min;

[0068] 2) Add 70.2g of concentrated sulfuric acid dropwise to the beaten iron mud, heat up to 62°C, stir and react for 2.5h;

[0069] 3) After the reaction is over, filter while it is hot, and recover the filtrate; the filter cake is washed with about 100ml of water, dried, recovered, and used as a plastic ink product;

[0070] 4) The filtrate recovered in step 3) is used to treat the phenylpyrazolone mother liquor wastewater.

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Abstract

The invention belongs to the technical field of nigrosine and particularly relates to a recycling method of nigrosine mud iron, comprising: 1) beating wet nigrosine mud iron with water; 2) adding concentrated sulfuric acid into the beaten iron mud, heating, and stirring to allow reacting; 3) after reaction, filtering while the reacted liquid is hot, recycling filtrate, washing filter cake with water, drying, and recycling as plastic ink; 4) using the filtrate recycled in step 3) to treat phenyl pyrazolone mother liquid waste. Iron mud is subjected to one-step simple treatment so as to arrive at effective utilization, so that waste is turned into wealth. The recycling method has the advantages that original hazardous waste can be turned into a product and a catalyst to arrive at cyclic economization; treatment cost for each ton of hazardous waste is about 5000 Yuan; after treatment via the method, the cost of sulfuric acid consumed per ton of iron mud is about 500 Yuan, the recycled product is 7300-8100 Yuan, and the profit may reach 6800-7600 Yuan.

Description

Technical field [0001] The invention belongs to the technical field of aniline black, and specifically relates to a method for recycling aniline black iron mud. Background technique [0002] Nigrosine is a chemical dye with strong coloring power, low dispersion, good light absorption, and high color stability. Therefore, aniline black can be used for plastic resin coloring, ink coloring, wood decoration process coloring, leather, cotton, and linen dyeing Agent coating, metal product coloring and paint coloring and other fields. [0003] The production process of nigrosine dyes generally uses low-priced ferric chloride as a catalyst for catalytic oxidation reaction. After the finished product is separated by acid precipitation, mother liquor is neutralized and aniline is recovered, iron is recovered in the form of iron sludge residue. The recovered iron sludge residue is a wet product, with a water content of generally 60%. Other components include iron hydroxide (about 10%), ferro...

Claims

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Application Information

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IPC IPC(8): C07D241/46C09B17/02B01J27/053C02F9/04C02F103/36C02F101/38
CPCB01J27/053C02F1/001C02F1/52C02F1/66C02F1/722C02F1/725C02F9/00C02F2101/38C02F2103/36C02F2301/08C07D241/46C09B17/02
Inventor 陈安源马在河王守满李郭鑫韩建朝于明夏婷婷王晓
Owner 青岛海湾集团有限公司
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