CN105110403A - Impurity removal process for sulfuric acid waste liquor - Google Patents
Impurity removal process for sulfuric acid waste liquor Download PDFInfo
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- CN105110403A CN105110403A CN201510511161.1A CN201510511161A CN105110403A CN 105110403 A CN105110403 A CN 105110403A CN 201510511161 A CN201510511161 A CN 201510511161A CN 105110403 A CN105110403 A CN 105110403A
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- sulfuric acid
- organic phase
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- acid waste
- waste liquor
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Abstract
The present invention discloses an impurity removal process for sulfuric acid waste liquor. The process comprises the steps of: (1) extracting: using an extraction agent to extract the sulfuric acid waste liquor to obtain impurity-removed waste acid and a rear-metal-containing organic phase, wherein a volume ratio of the extraction agent to the sulfuric acid waste liquor is 1:20-30, and the stirring time is 10-20 minutes; (2) washing: washing the rear-metal-containing organic phase with 2-4mol/L sulfuric acid, wherein the volume ratio of the rear-metal-containing organic phase to the sulfuric acid is 1:2-3; (3) performing reverse extraction: performing the reverse extraction on the washed rear-metal-containing organic phase with alkali liquor to obtain reverse extraction liquor and waste liquor, filtering the reverse extraction liquor to obtain impurity filtrate, carrying out filter pressing on the impurity filtrate to obtain a filter cake, and recycling the filter cake; and (4) regenerating: washing the waste liquor with the sulfuric acid to obtain a regenerated extraction agent for recycling. According to the impurity removal process for sulfuric acid waste liquor provided by the present invention, the impurity-removed sulfuric acid waste liquor is taken as a production raw material of polymeric ferric sulfate, so that the content of the heavy metal in a polymeric ferric sulfate product is effectively reduced, the polymeric ferric sulfate product has good quality, the rare metals are simultaneously recovered, the operation is easy and no contamination is caused.
Description
Technical field
The present invention relates to waste recycling technical field, particularly relate to a kind of impurity removal process of sulfuric acid waste.
Background technology
Bodied ferric sulfate is a kind of novel, high-quality, efficient molysite class non-polar high-polymer flocculation agent, coagulation performance is excellent, alumen ustum is closely knit, settling velocity is fast, and purifying water effect is excellent, and water quality is good, not containing objectionable impuritiess such as aluminium, chlorine and heavy metal ion, also the aqueous phase transfer of non-iron-ion, nontoxic, safe and reliable.There is turbidity removal, decolouring, de-oiling, dehydration, degerming, deodorizing, except algae, remove effect such as COD, BOD and heavy metal ion in water, to micro-pollution, containing algae, low-temperature and low turbidity purificating raw water Be very effective, especially good to high turbidity raw sewage decontamination effect improving, be therefore widely used in the middle of water treatment field.Sulfuric acid waste can as the raw materials for production of bodied ferric sulfate, but containing heavy metal in sulfuric acid waste, if be directly used as to produce bodied ferric sulfate, the quality of polyaluminum sulfate iron product can be affected, therefore sulfuric acid waste is before for the production of bodied ferric sulfate, needs to carry out removal of impurities.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of impurity removal process of sulfuric acid waste is provided, sulfuric acid waste after removal of impurities can be used as the raw materials for production of bodied ferric sulfate, effectively reduce the heavy metal content in polyaluminum sulfate iron product, bodied ferric sulfate quality product is made to reach high-quality, the impurity filter cake simultaneously come out contains a certain amount of rare metal can be recycled, wherein rare earth oxide content comparatively Gao Keda 8-10%, there is certain economic benefit, and extraction agent reusable edible, easy to operate, do not produce pollution.
To achieve these goals, the present invention adopts following technical scheme:
An impurity removal process for sulfuric acid waste, comprises the following steps:
(1) extract: utilize extraction agent to extract sulfuric acid waste in extraction tank, the volume ratio of extraction agent and sulfuric acid waste is 1:20-30, and mixing time is 10-20 minute, obtain removal of impurities spent acid and contain rare metal organic phase;
(2) wash: the sulfuric acid scrubbing containing rare metal organic phase 2-4mol/L step (1) obtained, the described volume ratio containing rare metal organic phase and sulfuric acid is 1:2-3;
(3) back extraction: the rare metal organic phase that contains after step (2) being washed carries out back extraction with alkali lye in reactor, obtain strip liquor and waste liquid, strip liquor is carried out filtration and obtains impurity filtrate, then obtain filter cake with pressure filter press filtration impurity filtrate, filter cake is recycled;
(4) regenerate: by the sulfuric acid scrubbing of the waste liquid 2-4mol/L that step (3) obtains, obtain the extraction agent cycling and reutilization regenerated.
Alkali lye described in step (3) is sodium hydroxide solution.
Compared with the prior art, beneficial effect of the present invention is as follows:
The impurity removal process of sulfuric acid waste of the present invention, sulfuric acid waste after removal of impurities can be used as the raw materials for production of bodied ferric sulfate, effectively reduce the heavy metal content in polyaluminum sulfate iron product, make bodied ferric sulfate quality product reach high-quality, the impurity filter cake simultaneously come out contains a certain amount of rare metal can be recycled, wherein rare earth oxide content comparatively Gao Keda 8-10%, there is certain economic benefit, and extraction agent reusable edible, easy to operate, do not produce pollution.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated, but the present invention is not limited only to these embodiments, and under the prerequisite not departing from present inventive concept, any improvement done all drops within protection scope of the present invention.
Embodiment 1:
An impurity removal process for sulfuric acid waste, comprises the following steps:
(1) extract: utilize extraction agent to extract sulfuric acid waste in extraction tank, the volume ratio of extraction agent and sulfuric acid waste is 1:20, and mixing time is 20 minutes, obtain removal of impurities spent acid and contain rare metal organic phase;
(2) wash: the sulfuric acid scrubbing containing rare metal organic phase 2mol/L step (1) obtained, the described volume ratio containing rare metal organic phase and sulfuric acid is 1:2;
(3) back extraction: the rare metal organic phase that contains after step (2) being washed carries out back extraction with alkali lye in reactor, obtain strip liquor and waste liquid, strip liquor is carried out filtration and obtains impurity filtrate, then obtain filter cake with pressure filter press filtration impurity filtrate, filter cake is recycled;
(4) regenerate: by the sulfuric acid scrubbing of the waste liquid 2mol/L that step (3) obtains, obtain the extraction agent cycling and reutilization regenerated.
Embodiment 2:
An impurity removal process for sulfuric acid waste, comprises the following steps:
(1) extract: utilize extraction agent to extract sulfuric acid waste in extraction tank, the volume ratio of extraction agent and sulfuric acid waste is 1:30, and mixing time is 15 minutes, obtain removal of impurities spent acid and contain rare metal organic phase;
(2) wash: the sulfuric acid scrubbing containing rare metal organic phase 3mol/L step (1) obtained, the described volume ratio containing rare metal organic phase and sulfuric acid is 1:3;
(3) back extraction: the rare metal organic phase that contains after step (2) being washed carries out back extraction with sodium hydroxide solution in reactor, obtain strip liquor and waste liquid, strip liquor is carried out filtration and obtains impurity filtrate, then obtain filter cake with pressure filter press filtration impurity filtrate, filter cake is recycled;
(4) regenerate: by the sulfuric acid scrubbing of the waste liquid 4mol/L that step (3) obtains, obtain the extraction agent cycling and reutilization regenerated.
Claims (2)
1. an impurity removal process for sulfuric acid waste, is characterized in that: comprise the following steps:
(1) extract: utilize extraction agent to extract sulfuric acid waste in extraction tank, the volume ratio of extraction agent and sulfuric acid waste is 1:20-30, and mixing time is 10-20 minute, obtain removal of impurities spent acid and contain rare metal organic phase;
(2) wash: the sulfuric acid scrubbing containing rare metal organic phase 2-4mol/L step (1) obtained, the described volume ratio containing rare metal organic phase and sulfuric acid is 1:2-3;
(3) back extraction: the rare metal organic phase that contains after step (2) being washed carries out back extraction with alkali lye in reactor, obtain strip liquor and waste liquid, strip liquor is carried out filtration and obtains impurity filtrate, then obtain filter cake with pressure filter press filtration impurity filtrate, filter cake is recycled;
(4) regenerate: by the sulfuric acid scrubbing of the waste liquid 2-4mol/L that step (3) obtains, obtain the extraction agent cycling and reutilization regenerated.
2. the impurity removal process of sulfuric acid waste according to claim 1, is characterized in that: the alkali lye described in step (3) is sodium hydroxide solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510511161.1A CN105110403A (en) | 2015-08-18 | 2015-08-18 | Impurity removal process for sulfuric acid waste liquor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510511161.1A CN105110403A (en) | 2015-08-18 | 2015-08-18 | Impurity removal process for sulfuric acid waste liquor |
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| CN105110403A true CN105110403A (en) | 2015-12-02 |
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| CN201510511161.1A Pending CN105110403A (en) | 2015-08-18 | 2015-08-18 | Impurity removal process for sulfuric acid waste liquor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108033589A (en) * | 2017-10-28 | 2018-05-15 | 株洲冶炼集团股份有限公司 | The method that a kind of waste acid removal of impurities in acid making system recycles |
| CN109516443A (en) * | 2018-12-27 | 2019-03-26 | 江苏永葆环保科技有限公司 | A kind of processing method of the Waste Sulfuric Acid containing aluminium |
| CN115466842A (en) * | 2021-11-12 | 2022-12-13 | 金为环保科技(常州)有限公司 | Treatment method and application of waste lithium battery waste liquid |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4986917A (en) * | 1989-07-10 | 1991-01-22 | First Chemical Corporation | Selective recovery of a nitrophenolic by-product from nitration waste water by extraction |
| CN101172727A (en) * | 2007-10-16 | 2008-05-07 | 中冶南方工程技术有限公司 | Waste hydrochloric acid liquid cleaning treatment technique |
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2015
- 2015-08-18 CN CN201510511161.1A patent/CN105110403A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4986917A (en) * | 1989-07-10 | 1991-01-22 | First Chemical Corporation | Selective recovery of a nitrophenolic by-product from nitration waste water by extraction |
| CN101172727A (en) * | 2007-10-16 | 2008-05-07 | 中冶南方工程技术有限公司 | Waste hydrochloric acid liquid cleaning treatment technique |
Non-Patent Citations (1)
| Title |
|---|
| 何林生: "从钛白浓废酸中提钪及其经济效益", 《环境工程》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108033589A (en) * | 2017-10-28 | 2018-05-15 | 株洲冶炼集团股份有限公司 | The method that a kind of waste acid removal of impurities in acid making system recycles |
| CN109516443A (en) * | 2018-12-27 | 2019-03-26 | 江苏永葆环保科技有限公司 | A kind of processing method of the Waste Sulfuric Acid containing aluminium |
| CN109516443B (en) * | 2018-12-27 | 2021-10-01 | 江苏永葆环保科技有限公司 | Treatment method of aluminum-containing waste sulfuric acid |
| CN115466842A (en) * | 2021-11-12 | 2022-12-13 | 金为环保科技(常州)有限公司 | Treatment method and application of waste lithium battery waste liquid |
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Application publication date: 20151202 |
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