Mixed alkaline residue treatment method during indigo production

A technology of mixing alkali slag and mixed alkali, which is applied in the direction of chemical instruments and methods, alkali metal carbonates, alkali metal compounds, etc., can solve the problems of secondary pollution, potassium resources without effective utilization of potassium, etc., and achieve low investment Effect

Inactive Publication Date: 2015-07-08
INNER MONGOLIA TAIXING TAIFENG CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alkali carried in the alkali slag is lost with the alkali slag. Now about 1000kg of alkali slag rich in potassium hydroxide produced per ton of ind

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Ethanol extraction of organic matter in carbonized liquid

[0022] Take 20g of carbonization solution, including 0.47g of anthranilic acid and 0.17g of phenylaminoacetic acid, add 3g of ethanol, shake for 2 minutes and then let stand for 30 minutes to separate layers. The mass of the upper layer is 5.32g, of which 0.45g is anthranilic acid, 0.16g is phenylaminoacetic acid, and 2.58g is ethanol. The mass of the lower layer is 17.47g, of which 0.02g is anthranilic acid, 0.01g is phenylaminoacetic acid, and 0.14g is ethanol. The extraction rate of organic matter reaches more than 95%.

Embodiment 2

[0023] Example 2 Methanol extraction of organic matter in carbonized liquid

[0024] Take 20g of carbonization solution, including 0.47g of anthranilic acid and 0.17g of phenylaminoacetic acid, add 3g of methanol, shake for 2 minutes and then stand for 2 hours, the mixture cannot be separated.

Embodiment 3

[0025] Example 3 Isopropanol extraction of organic matter in carbonized liquid

[0026] Take 20g of carbonization solution, including 0.47g of anthranilic acid and 0.17g of phenylaminoacetic acid, add 3.04g of isopropanol, shake for 2 minutes and then let it stand for 30 minutes to separate layers. The mass of the upper layer is 6.13g, of which 0.40g is for anthranilic acid, 0.16g is for phenylaminoacetic acid, and 3.03g is for isopropanol. The mass of the lower layer is 16.93g, of which 0.07g is anthranilic acid, 0.01g is phenylaminoacetic acid, and 0.05g is isopropanol. The extraction rate of organic matter reached 87.5%.

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PUM

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Abstract

The invention relates to a mixed alkaline residue treatment method during indigo production, first alkaline residue solid waste which is rich in sodium carbonate and organic impurities and carries 20-30% of NaOH and KOH mixed alkaline is added into a reactor, wherein the alkaline residue solid waste is precipitated during the process of concentration of indigo oxidation filter pressing mother liquor, proper amount of water is added, after stirring even, carbon dioxide is introduced until hydroxy radicals are completely neutralized, by one-time centrifugal separation, sodium carbonate is separated to use as a byproduct for sell; then filtrate is extracted by an organic solvent for separation of an organic phase and a water phase, most of phenylamino acetate and by-product anthranilate enters the organic phase, the extracted water phase and organic phase are respectively distilled, after distillation, the solvent in the organic phase is recycled to use in the extraction process, the distilled water phase returns to the mixed alkaline concentrated by indigo oxidation filter pressing mother liquor, through ion exchange and secondary centrifugation separation, solid sodium carbonate is separated, and the separation mother liquor returns to the indigo production alkali balance system.

Description

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Claims

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Application Information

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Owner INNER MONGOLIA TAIXING TAIFENG CHEM
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