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Method for producing polymeric aluminium ferric sulfate solution from industrial waste sulfuric acid generated during purification of acetylene gas and red mud

A technology of polymerizing aluminum ferric sulfate and waste sulfuric acid, which is applied in ferric sulfate, flocculation/sedimentation water/sewage treatment, etc., to achieve the effect of simple process, less metal residue and fast settling time

Active Publication Date: 2015-03-25
河南开祥精细化工有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0009] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a method for producing polyaluminum ferric sulfate solution using industrial waste sulfuric acid and red mud produced by purifying acetylene gas, which can effectively solve the recovery of waste sulfuric acid and red mud use, and reduce environmental pollution

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  • Method for producing polymeric aluminium ferric sulfate solution from industrial waste sulfuric acid generated during purification of acetylene gas and red mud

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Embodiment 1

[0024] The waste sulfuric acid produced by purifying acetylene gas in the production process of 1,4-butanediol is a stable dark brown liquid, which is composed of 80% sulfuric acid, 11% water, 9% organic matter and dust by weight percentage, and the dry red mud is brown solid According to the X-ray fluorescence spectrometry analysis in the industry standard YS / T 575.23-2009 of the People's Republic of China, 21% of silicon dioxide, 24% of aluminum oxide, 17% of iron oxide, 16% of calcium oxide, 6% of sodium oxide, and 16% of other %, water and red mud are mixed and pulped, the water content of the pulped red mud is 78%, the pulped red mud and waste sulfuric acid are uniformly mixed according to the weight ratio of 4:1, stirred and mixed for 2.5 hours, and the reacted mixture is obtained, and then allowed to stand Leach for 10 hours to obtain the leachate, filter to obtain the filtrate, mix diisooctyl phosphate with the filtrate at a volume ratio of 1:12, stir, leave to stand an...

Embodiment 2

[0026] The waste sulfuric acid produced by purifying acetylene gas in the production process of 1,4-butanediol is a stable dark brown liquid, which is composed of the following weight percentages: 85% sulfuric acid, 8% water, 7% organic matter and dust, and the alumina production line settles The thin red mud at the outlet of the tank has a water content of 70%. After drying to constant weight at 105-110°C, it is analyzed by X-ray fluorescence spectrometry in the industry standard YS / T 575.23-2009 of the People's Republic of China. Among them, 22% of silicon dioxide and 22% of oxidized Aluminum 25%, iron oxide 15%, calcium oxide 16%, sodium oxide 6%, other 16%, water and thin red mud are mixed and pulped, the water content of pulped red mud is 80%, pulped red mud and waste sulfuric acid are based on weight Mix evenly at a ratio of 5:1, stir and mix for 2 hours to obtain the reacted mixture, then stand for leaching for 7 hours to obtain the leachate, filter to obtain the filtrat...

Embodiment 3

[0028]The waste sulfuric acid produced by purifying acetylene gas during the production of 1,4-butanediol is a stable dark brown liquid, which is composed of the following weight percentages: sulfuric acid 90%, water 6%, organic matter and dust 4%, dry red mud is Brown solid, analyzed according to X-ray fluorescence spectrometry in the industry standard YS / T 575.23-2009 of the People's Republic of China, including 21% silicon dioxide, 24% aluminum oxide, 17% iron oxide, 16% calcium oxide, and 6% sodium oxide. The other 16%, water and red mud are mixed and pulped, the water content of pulped red mud is 70%, and waste sulfuric acid is uniformly mixed with waste sulfuric acid at a weight ratio of 2:1, stirred and mixed for 4 hours, and the reacted mixture is obtained, and then leached by standing for 12 Hours, get the leaching solution, filter to obtain the filtrate, diisooctyl phosphate and the filtrate are mixed at a volume ratio of 1:10, stirred, left to stand and layered into ...

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Abstract

The invention discloses a method for producing a polymeric aluminium ferric sulfate solution from industrial waste sulfuric acid generated during purification of acetylene gas and red mud. The method comprises the following steps: adding water to the red mud to pulp the red mud, mixing the pulped red mud with waste sulfuric acid in a weight ratio of (2-5) to 1, stirring and mixing the materials to react for 1-4 hours to obtain a reaction mixture, standing to leach the mixture for 6-12 hours to obtain leachate, filtering the leachate to obtain filtrate, extracting rare metal impurities in the filtrate with di(isooctyl) phosphate, extracting organic matter impurities in a solution with an extracting agent and alkalifying and polymerizing raffinate to obtain the polymeric aluminium ferric sulfate solution with polymeric aluminium ferric sulfate mass content not less than 8% (in terms of aluminium ferric oxide). The method has the positive beneficial effects that the existing and potential environmental problems caused by discharge of the waste sulfuric acid after neutralizing treatment or direct discharge of the waste sulfuric acid and stacking and storage of the red mud on the land are solved; the polymeric aluminium ferric sulfate product capable of purifying sewage is produced from the waste sulfuric acid and the red mud, thus reducing environmental pollution caused by the waste sulfuric acid and the red mud; the process is simple and is easy to operate, so that the waste treatment cost is reduced; when serving as a flocculating agent, the prepared polymeric aluminium ferric sulfate product has the advantages of high settling time, large flocs, few metal residues and good sewage purifying effects.

Description

technical field [0001] The invention relates to a method for producing polyaluminum ferric sulfate by using industrial waste sulfuric acid and red mud, in particular to a method for producing polyaluminum ferric sulfate solution by using industrial waste sulfuric acid and red mud produced by purifying acetylene gas. Background technique [0002] In the production of aluminum ore by Bayer method or sintering method, 1 ton of alumina will produce 1.1-1.5 tons of red mud. With the rapid development of alumina industry in recent years, the global annual discharge of red mud has exceeded 150 million tons. In 2012, China alone produced about 60 million tons of red mud. At present, the disposal methods of red mud in the world are ocean discharge and land storage, and most of our country adopts the latter. The red mud produced is medium-strong alkaline, and the accumulation of red mud will cause some pollution to the groundwater, and the living water and crops of the surrounding re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/14C02F1/52
Inventor 曹敏张敬东程相龙杨勇李丙学刘志辉张作才卫学武
Owner 河南开祥精细化工有限公司
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