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Method for preparation of chrome tanning agent and combined production of vitamin K3 through using chromium-rich sludge

A technology of vitamins and chrome tanning agents, applied in sludge treatment, oxidation quinone preparation, chemical instruments and methods, etc., can solve problems such as environmental pollution, and achieve high environmental and economic value.

Inactive Publication Date: 2013-10-16
SHANDONG HUASHENG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is aimed at above-mentioned problem, combines the chromium-rich sludge treatment process of tannery industry and existing vitamin K 3 The production process proposes a method to solve the pollutants in two industries and turn waste into treasure, and realizes the chromium-rich sludge and vitamin K 3 Chromium-containing waste liquid, vitamin K 3 The combined utilization of three hazardous wastes from solvent alcohol rectification residues is used to prepare chrome tanning agent products that meet the requirements of the national standard, which completely solves the environmental pollution problem of these three hazardous wastes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Dry 2000g of chromium-rich sludge (including chromium trioxide content of 5wt% and water content of 80wt%) in an oven at 105°C, pulverize the material with a pulverizer, and pass through a 100-mesh sieve to obtain about 20g of dander. Chromium powder is about 450g (the content of chromium trioxide is detected to be 22%), and it is ready for use.

[0014] Take the above chromium hydroxide powder and slowly add vitamin K 3 Add 2 drops of defoamer to 1650g of chromium-containing waste liquid (7.5wt% chromium content), raise the temperature to 65-70°C, keep it warm for 3 hours, and start to add 165g of rectification residue with an alcohol concentration of 10wt% dropwise at a rate of After 30 minutes, after the dropwise addition is completed, heat up to 90-95°C for 30 minutes, heat up to 98-100°C for 30 minutes to ensure that hexavalent chromium is not detected, cool down to about 45°C and discharge, and press filter to obtain chrome tanning Agent about 2000g (chromium tri...

Embodiment 2

[0017] Take 450g of chromium hydroxide powder treated according to the method in Example 1 and slowly add it into 2000g of chromium-containing waste liquid produced by vitamin K3 (chromium content 7.5wt%), add 2 drops of defoamer, raise the temperature to 100°C, keep it warm for 1 hour, and add the concentration 41g of 60wt% sodium dichromate solution, keep warm for another 2 hours, cool down to 70°C, start to drop 250g of rectification residue with alcohol concentration of 10wt%, and the dropping speed is 45 minutes. ℃ for 1 hour to ensure that hexavalent chromium is not detected, the temperature is cooled to about 45 ℃ and the material is discharged, and about 2400g of chrome tanning agent (content of chromium trioxide 11wt%) is obtained after pressure filtration.

[0018] When the chrome tanning agent is used in tanning, the shrinkage temperature is 93-95°C, the thickening rate is 16%, the grain surface of the finished leather is clear, and the lake blue color of the chrome ...

Embodiment 3

[0020] Take 450g of chromium hydroxide powder treated according to the method in Example 1 and slowly add it into 2000g of chromium-containing waste liquid produced by vitamin K3 (chromium content 7.5wt%), add 2 drops of defoamer, heat up to 75°C, and start adding dropwise alcohol concentration of 200g of 10wt% rectification residue, the drop rate is 40 minutes, after the drop is completed, the temperature is raised to 85-90°C for 3 hours to ensure that hexavalent chromium is not detected, the temperature is lowered to about 45°C, and the material is discharged, and the chromium is obtained after pressure filtration About 2250g of tanning agent (chromium trioxide content 11%).

[0021] When the chrome tanning agent is used in tanning, the shrinkage temperature is 90-92°C, the thickening rate is 13%, the leather yield is high, the grain surface of the finished leather is clear, and the color of the chrome tanned leather is dark blue.

[0022]

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Abstract

The invention relates to a method for the preparation of a chrome tanning agent and the combined production of vitamin K3 through using chromium-rich sludge. The method comprises a step of purifying chromium-rich sludge generated in a leather making enterprise, and a step of combining with a waste liquid generated in the production of vitamin K3 to prepare the chrome tanning agent. The method solves a discharge problem of the waste liquid generated in the production of vitamin K3, and also well solves discharge and processing problems of chromium-containing solid dangerous wastes of the leather making enterprise.

Description

technical field [0001] The invention belongs to a clean production method, and relates to a method for recycling chromium-rich sludge in the leather industry, in particular to co-production of vitamin K 3 Production waste recycling technology to make chromium-rich sludge and vitamin K in tannery 3 All production waste can be reused to produce chrome tanning agent for tanning. Solve the chromium-rich sludge and vitamin K in the leather industry 3 Environmental pollution problem of production waste. Background technique [0002] The emission of chromium pollution from the tanning industry has been included in the monitoring and management of heavy metal emissions from key industries in the country. At present, the research on chrome-rich sludge is mainly focused on the internal recycling of tannery enterprises, and some leather chemical enterprises have developed chromium-containing tanning agent and retanning agent products as a single product. However, the use of chromiu...

Claims

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Application Information

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IPC IPC(8): C14C3/06C02F11/00C02F11/12B09B3/00C07C50/12C07C46/02
Inventor 胡康张昭傅春芳孙新科胡晓
Owner SHANDONG HUASHENG CHEM TECH
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