CN103834989A - Process of producing calcium sulfate crystal whiskers from chloride-containing wastewater generated in chloride process titanium dioxide production - Google Patents
Process of producing calcium sulfate crystal whiskers from chloride-containing wastewater generated in chloride process titanium dioxide production Download PDFInfo
- Publication number
- CN103834989A CN103834989A CN201410061397.5A CN201410061397A CN103834989A CN 103834989 A CN103834989 A CN 103834989A CN 201410061397 A CN201410061397 A CN 201410061397A CN 103834989 A CN103834989 A CN 103834989A
- Authority
- CN
- China
- Prior art keywords
- chloride
- waste water
- calcium sulfate
- titanium dioxide
- content
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Crystals, And After-Treatments Of Crystals (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention relates to a process of producing calcium sulfate crystal whiskers from chloride-containing wastewater generated in chloride process titanium dioxide production. The process comprises the following steps: respectively colleting, clarifying, purifying and filtering chloride-containing wastewater generated in chloride process titanium dioxide production and sodium sulfate-containing wastewater, mixing for reacting, stirring, heating and adding sulfuric acid to adjust the pH value; meanwhile, adding magnesium chloride as a growth substance; placing in a crystallization tank to age and crystallize to obtain calcium sulfate crystals; filtering, and adding H2SO4 to be buffered and heated to be boiled; thermally filtering and washing by deionized water at the same time to obtain calcium sulfate crystal whiskers; feeding to a fluidized bed dryer to be dried and hydrated, and packaging to obtain anhydrous calcium sulfate crystal whiskers. The process is simple and low in cost, and is suitable for industrialized production, so that wastewater is comprehensively utilized.
Description
Technical field
The present invention relates to the technique that chloride waste water of a kind of chloride process titanium dioxide is produced calcium sulfate crystal whiskers, particularly chloride waste water production calcium sulfate crystal whiskers of a kind of chloride process titanium dioxide reclaims the joint process of industrial sodium-chlor simultaneously.
Background technology
Calcium sulfate crystal whiskers has good mechanical property, good consistency, good smoothness, the feature that regenerability is good, is mainly used in increase constituent element, friction materials, environmental engineering filtration, the asphalt modification of papermaking, matrix material and improves in sticking power, temperature tolerance and the insulativity of coating and paint.At present, the production method of calcium sulfate crystal whiskers is take gypsum as starting material, by manual control with monocrystalline form growth, has fibrous (must shape) single crystal of uniform cross section, complete profile, perfect internal structure.
Chloride process titanium dioxide is state-of-the-art titanium white production technology in the world, and chloride process titanium dioxide product specification is high, the three wastes are few, environmentally friendly, is the titanium white production technology of domestic encourage growth.But in chloride process titanium dioxide production process, produce titanium tetrachloride output chloride slag by rich titanium material, mainly contain FeCl
2, FeCl
3, AlCl
3, CaCl
2, MnCl
2deng muriate, need to carry out harmless treatment.Conventionally in the time of harmless treatment by dissolved chloride slag water, add lime and be neutralized to alkalescence, press filtration, its filter residue composition is Fe (OH)
3, Mn (OH)
2, Mg (OH)
2, Al (OH)
3deng industrial waste, piled in slag field or made cement raw material.Its alkaline filtrate mainly contains CaCl
2, the soluble chloride such as NaCl.The external chloride process titanium dioxide Enterprise Construction of waste water of this high chlorine root be directly discharged into by the sea in seawater or domestic injection zone trade effluent and municipal effluent through secondary-cleaned, processing makes Cl
-qualified discharge; Have even after sour water dissolved chloride slag liquid caustic soda neutralization, solid-liquid separation, filtrate evaporative crystallization reclaims chlorine root with the form of sodium-chlor.But the Technology of chlorine root in this removal waste water is feasible, be difficult to carry out but lack economy.Du pont company works out a kind of that chloride slag is dissolved, and acid flushing cinder water does not neutralize the treatment technology being directly filled in the underground RKB with enclosed construction of 2000m, is denied by locality gradually yet.So far the treatment technology that chloride waste water of chloride process titanium dioxide does not have economically feasible, has an economic benefit.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of technique simple, with low cost, have an economic benefit, technique that chloride waste water of chloride process titanium dioxide environmentally friendly, can suitability for industrialized production is produced calcium sulfate crystal whiskers.
Technical solution of the present invention is:
The technique that chloride waste water of chloride process titanium dioxide is produced calcium sulfate crystal whiskers, its concrete steps are as follows:
1., by the waste water of chloride chloride process titanium dioxide after collection, supernatant, purification, filtration, make Ca in waste water
2+content>=50g/L, Cl
-content>=100g/L, content≤20ppm of Σ Fe, Pb
2+, Bi
3+, Cd
2+content≤5ppm, store for future use;
2., by the waste water of contains sodium sulfate after collection, supernatant, purification, filtration, make SO in waste water
4 2-content>=50g/L, content≤20ppm of Σ Fe, Cr
6+content≤5ppm, store for future use; Or be mixed with SO with Sodium sulfate anhydrous.min(99)
4 2-concentration is the solution for standby of 50g/L～200g/L;
3. Ca in the solution, 1. obtaining according to step
2+2. SO in the solution obtaining with step
4 2-mol ratio 1:1～1:1.5 by step 1. with step 2. solution mix react, stir, be heated to 60 ℃～100 ℃, add sulfuric acid and be adjusted to pH
=2～5; Add magnesium chloride to make growth substance, the add-on of described magnesium chloride is 3% of product calcium sulfate theoretical weight simultaneously, and the reaction times is 20min～60min;
4., be put into ageing in crystallizer, crystallization 4h～6h, obtain calcium sulphate crystal;
5., calcium sulphate crystal is carried out to vacuum filtration or centrifuging, calcium sulphate crystal is collected in container and adds the H of concentration 1mol/L
2sO
4in dash-control pH 2～5 be heated to boil, heat filtering to use deionized water wash, the consumption of described deionized water be 1 times～5 times of calcium sulphate crystal weight simultaneously, filters and obtains calcium sulfate crystal whiskers;
6., whisker is sent in fluidized bed dryer at 60 ℃～200 ℃, drying and dewatering, packing obtains anhydrous calcium sulfate whisker;
7., the acid mother liquid that obtains after 5. filtering of step adds NaOH and is neutralized to pH=6.5～7, adds the salting-out agent magnesium chloride evaporative crystallization industry NaCl that saltouts, the add-on of described salting-out agent magnesium chloride accounts for 20%～40% of acid mother liquid quality;
8., step 7. in the middle aqueous mother liquor of the magnesium chloride containing that obtains of crystallization industry NaCl return to the step evaporative crystallization industry NaCl that 7. proceeds to saltout, SO in middle aqueous mother liquor
4 2-enriching quantity>=50g/L time, return to step and 3. replace 2. sodium sulfate and the growth substance magnesium chloride in solution of part steps, circulation extracting sulfuric acid calcium crystal.
The waste water of described contains sodium sulfate contains Na for producing Vanadium Pentoxide in FLAKES
2sO
4waste water, or with producing the byproduct saltcake of sodium dichromate, or produce hypo and contain Na
2sO
4waste liquid through treatment and purification substitute.
The acid mother liquid that step obtains after 5. filtering can also return to step 3. for replacing sulfuric acid regulation solution pH value.
The waste water that described chloride process titanium dioxide is chloride is that chloride process titanium dioxide contains the waste water that calcium chloride is main component.
Beneficial effect of the present invention:
Technique is simple, with low cost, utilizes the waste water and the waste water of producing Vanadium Pentoxide in FLAKES contains sodium sulfate of chloride process titanium dioxide chloride containing calcium, produces the sodium sulfate whisker with economic benefit; Calcium sulfate crystal whiskers crystallinic acid aqueous mother liquor is neutralized with alkali, and the evaporative crystallization industry NaCl that saltouts, realizes closed cycle; Can realize suitability for industrialized production, accomplish wastewater utilization, resource utilization is recycled valuable constituent.A difficult problem that has solved chloride wastewater treatment of chloride process titanium dioxide, further improves chloride process titanium dioxide level of clean production, more friendly with environment.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Embodiment 1
1., by the waste water of chloride process titanium dioxide chloride containing calcium (being mainly calcium chloride, sodium-chlor) after collection, supernatant, purification, filtration, make Ca in waste water
2+content>=50g/L, Cl
-content>=100g/L, content≤20ppm of Σ Fe, Pb
2+, Bi
3+, Cd
2+content≤5ppm, store for future use;
2., production Vanadium Pentoxide in FLAKES is contained to Na
2sO
4waste water after collection, supernatant, purification, filtration, make SO in waste water
4 2-content>=50g/L, content≤20ppm of Σ Fe, Cr
6+content≤5ppm, store for future use;
3. Ca in the solution, 1. obtaining according to step
2+2. SO in the solution obtaining with step
4 2-mol ratio 1:1.5 by step 1. with step 2. solution mix react, stir, be heated to 80 ℃, add sulfuric acid and be adjusted to pH
=4; Add magnesium chloride to make growth substance, the add-on of described magnesium chloride is 3% of product calcium sulfate theoretical weight simultaneously, and the reaction times is 30min;
4., be put into ageing in crystallizer, crystallization 5h, obtain calcium sulphate crystal;
5., calcium sulphate crystal is carried out to vacuum filtration or centrifuging, calcium sulphate crystal is collected in container and adds the H of concentration 1mol/L
2sO
4in dash-control pH 4 be heated to boil, heat filtering to use deionized water wash, the consumption of described deionized water be 4 times of calcium sulphate crystal weight simultaneously, filters and obtains calcium sulfate crystal whiskers;
6., whisker is sent in fluidized bed dryer at 60 ℃, drying and dewatering, packing obtains anhydrous calcium sulfate whisker; After testing, the length-to-diameter ratio 10～200 of anhydrous calcium sulfate whisker, CaSO
4content>=98%, whiteness>=98%, aerated density is≤0.6g/cm
3;
7., the mother liquor that obtains after 5. filtering of step adds NaOH and is neutralized to pH=6.5, the salting-out agent magnesium chloride that add-on the accounts for acid mother liquid quality 30% evaporative crystallization industry NaCl that saltouts;
8., step 7. in the middle aqueous mother liquor of crystallization industry NaCl magnesium chloride containing return to the step evaporative crystallization industry NaCl that 7. proceeds to saltout.SO in central aqueous mother liquor
4 2-enriching quantity>=50g/L time, return to solution and growth substance magnesium chloride extracting sulfuric acid calcium crystal that 3. step replaces part steps 2. to obtain.
Embodiment 2
1., by the waste water of chloride process titanium dioxide chloride containing calcium (being mainly calcium chloride, sodium-chlor) after collection, supernatant, purification, filtration, make Ca in waste water
2+content>=50g/L, Cl
-content>=100g/L, content≤20ppm of Σ Fe, Pb
2+, Bi
3+, Cd
2+content≤5ppm, store for future use;
2., the byproduct saltcake of producing sodium dichromate is dissolved in Vanadium Pentoxide in FLAKES waste water to supernatant, purification, Cr
6+reduction generates after chromium hydroxide filtration, makes SO in waste water
4 2-content>=100g/L, content≤20ppm of Σ Fe, Cr
6+content≤5ppm, store for future use;
3. Ca in the solution, 1. obtaining according to step
2+2. SO in the solution obtaining with step
4 2-mol ratio 1:1.15 by step 1. with step 2. solution mix react, stir, be heated to 60 ℃, add sulfuric acid and be adjusted to pH
=2; Add magnesium chloride to make growth substance, the add-on of described magnesium chloride is 3% of product calcium sulfate theoretical weight simultaneously, and the reaction times is 20min;
4., be put into ageing in crystallizer, crystallization 4h, obtain calcium sulphate crystal;
5., calcium sulphate crystal is carried out to vacuum filtration or centrifuging, calcium sulphate crystal is collected in container and adds the H of concentration 1mol/L
2sO
4in dash-control pH 2 be heated to boil, heat filtering to use deionized water wash, the consumption of described deionized water be 1 times of calcium sulphate crystal weight simultaneously, filters and obtains calcium sulfate crystal whiskers;
6., whisker is sent in fluidized bed dryer at 200 ℃, drying and dewatering, packing obtains anhydrous calcium sulfate whisker;
7., the mother liquor that obtains after 5. filtering of step adds NaOH and is neutralized to pH=7, the salting-out agent magnesium chloride that add-on the accounts for acid mother liquid quality 40% evaporative crystallization industry NaCl that saltouts; After testing, the length-to-diameter ratio 10～200 of anhydrous calcium sulfate whisker, CaSO
4content>=98%, whiteness>=98%, aerated density is≤0.5g/cm
3;
8., step 7. in the middle aqueous mother liquor of crystallization industry NaCl magnesium chloride containing return to the step evaporative crystallization industry NaCl that 7. proceeds to saltout, SO in middle aqueous mother liquor
4 2-enriching quantity>=50g/L time, return to solution and growth substance magnesium chloride extracting sulfuric acid calcium crystal that 3. step replaces part 2. to obtain containing step.
Embodiment 3
1., by the waste water of chloride process titanium dioxide chloride containing calcium (being mainly calcium chloride, sodium-chlor) after collection, supernatant, purification, filtration, make Ca in waste water
2+content>=50g/L, Cl
-content>=100g/L, content≤20ppm of Σ Fe, Pb
2+, Bi
3+, Cd
2+content≤5ppm, store for future use;
2., the sedimentation underflow waste liquid of producing hypo is contained to main amount Na
2sO
4, all the other Na
2s
2o
3, Na
2sO
3, first by S
2o
3 -2, SO
3 -2be oxidized to SO
4 2-after, after collection, supernatant, purification, filtration, make SO in waste water
4 2-content>=200g/L, content≤20ppm of Σ Fe, Cr
6+content≤5ppm, store for future use;
3. Ca in the solution, 1. obtaining according to step
2+2. SO in the solution obtaining with step
4 2-mol ratio 1:1.25 by step 1. with step 2. solution mix react, stir, be heated to 100 ℃, add sulfuric acid and be adjusted to pH
=5; Add magnesium chloride to make growth substance, the add-on of described magnesium chloride is 3% of product calcium sulfate theoretical weight simultaneously, and the reaction times is 60min;
4., be put into ageing in crystallizer, crystallization 5h, obtain calcium sulphate crystal;
5., calcium sulphate crystal is carried out to vacuum filtration or centrifuging, calcium sulphate crystal is collected in container and adds the H of concentration 1mol/L
2sO
4in dash-control pH 5 be heated to boil, heat filtering to use deionized water wash, the consumption of described deionized water be 3 times of calcium sulphate crystal weight simultaneously, filters and obtains calcium sulfate crystal whiskers;
6., whisker is sent in fluidized bed dryer at 200 ℃, drying and dewatering, packing obtains anhydrous calcium sulfate whisker;
7., the mother liquor that obtains after 5. filtering of step adds NaOH and is neutralized to pH=7, the salting-out agent magnesium chloride that add-on the accounts for acid mother liquid quality 30% evaporative crystallization industry NaCl that saltouts; After testing, the length-to-diameter ratio 10～200 of anhydrous calcium sulfate whisker, CaSO
4content>=98%, whiteness>=98%, aerated density is≤0.5g/cm
3;
8., step 7. in when crystallization industry NaCl the middle aqueous mother liquor of magnesium chloride containing return to the step evaporative crystallization industry NaCl that 7. proceeds to saltout; SO in middle aqueous mother liquor
4 2-enriching quantity>=50g/L time, return to solution and growth substance magnesium chloride extracting sulfuric acid calcium crystal that 3. step replaces part 2. to obtain containing step.
Embodiment 4
1., by the waste water of chloride process titanium dioxide chloride containing calcium (being mainly calcium chloride, sodium-chlor) after collection, supernatant, purification, filtration, make Ca in waste water
2+content>=50g/l, Cl
-content>=100g/L, content≤20ppm of Σ Fe, Pb
2+, Bi
3+, Cd
2+content≤5ppm, store for future use;
2., be mixed with SO with Sodium sulfate anhydrous.min(99)
4 2-concentration is the metabisulfite solution of 200g/L;
3. Ca in the solution, 1. obtaining according to step
2+2. SO in the solution obtaining with step
4 2-mol ratio 1:1 by step 1. with step 2. solution mix react, stir, be heated to 80 ℃, add sulfuric acid and be adjusted to pH
=3; Add magnesium chloride to make growth substance, the add-on of described magnesium chloride is 3% of product calcium sulfate theoretical weight simultaneously, and the reaction times is 40min;
4., be put into ageing in crystallizer, crystallization 5h, obtain calcium sulphate crystal;
5., calcium sulphate crystal is carried out to vacuum filtration or centrifuging, calcium sulphate crystal is collected in container and adds the H of concentration 1mol/L
2sO
4in dash-control pH 3 be heated to boil, heat filtering to use deionized water wash, the consumption of described deionized water be 2 times of calcium sulphate crystal weight simultaneously, filters and obtains calcium sulfate crystal whiskers;
6., whisker is sent in fluidized bed dryer at 160 ℃, drying and dewatering, packing obtains anhydrous calcium sulfate whisker; After testing, the length-to-diameter ratio 10～200 of anhydrous calcium sulfate whisker, CaSO
4content>=98%, whiteness>=98%, aerated density is≤0.5g/cm
3;
7., the mother liquor that obtains after 5. filtering of step adds NaOH and is neutralized to pH=7, the salting-out agent magnesium chloride that add-on the accounts for acid mother liquid quality 20% evaporative crystallization industry NaCl that saltouts;
8., step 7. in the middle aqueous mother liquor of crystallization industry NaCl magnesium chloride containing return to the step evaporative crystallization industry NaCl that 7. proceeds to saltout, SO in middle aqueous mother liquor
4 2-enriching quantity>=50g/L time, return to solution and growth substance magnesium chloride extracting sulfuric acid calcium crystal that 3. step replaces part 2. to obtain containing step.
Embodiment 5
Chloride waste water of chloride process titanium dioxide of embodiment 1～embodiment 4 is produced the acid mother liquid that in calcium sulfate crystal whiskers technique, step obtains after 5. filtering and can also be returned to step 3. for replacing sulfuric acid regulation solution pH value, the other the same as in Example 1～embodiment 4.
Claims (4)
1. the technique that chloride waste water of chloride process titanium dioxide is produced calcium sulfate crystal whiskers, is characterized in that: concrete steps are as follows:
1., by the waste water of chloride chloride process titanium dioxide after collection, supernatant, purification, filtration, make Ca in waste water
2+content>=50g/L, Cl
-content>=100g/L, content≤20ppm of Σ Fe, Pb
2+, Bi
3+, Cd
2+content≤5ppm, store for future use;
2., by the waste water of contains sodium sulfate after collection, supernatant, purification, filtration, make SO in waste water
4 2-content>=50g/L, content≤20ppm of Σ Fe, Cr
6+content≤5ppm, store for future use; Or be mixed with SO with Sodium sulfate anhydrous.min(99)
4 2-concentration is the solution for standby of 50g/L～200g/L;
3. Ca in the solution, 1. obtaining according to step
2+2. SO in the solution obtaining with step
4 2-mol ratio 1:1～1:1.5 by step 1. with step 2. solution mix react, stir, be heated to 60 ℃～100 ℃, add sulfuric acid and be adjusted to pH
=2～5; Add magnesium chloride to make growth substance, the add-on of described magnesium chloride is 3% of product calcium sulfate theoretical weight simultaneously, and the reaction times is 20min～60min;
4., be put into ageing in crystallizer, crystallization 4h～6h, obtain calcium sulphate crystal;
5., carry out vacuum filtration or centrifuging, calcium sulphate crystal is collected in container and adds the H of concentration 1mol/L
2sO
4in dash-control pH 2～5 be heated to boil, heat filtering to use deionized water wash, the consumption of described deionized water be 1 times～5 times of calcium sulphate crystal weight simultaneously, filters and obtains calcium sulfate crystal whiskers;
6., whisker is sent in fluidized bed dryer at 60 ℃～200 ℃, drying and dewatering, packing obtains anhydrous calcium sulfate whisker;
7., the acid mother liquid that obtains after 5. filtering of step adds NaOH and is neutralized to pH=6.5～7, adds the salting-out agent magnesium chloride evaporative crystallization industry NaCl that saltouts, the add-on of described salting-out agent magnesium chloride accounts for 20%～40% of acid mother liquid quality;
8., step 7. in the middle aqueous mother liquor of the magnesium chloride containing that obtains of crystallization industry NaCl return to the step evaporative crystallization industry NaCl that 7. proceeds to saltout, SO in middle aqueous mother liquor
4 2-enriching quantity>=50g/L time, return to step and 3. replace 2. sodium sulfate and the growth substance magnesium chloride in solution of part steps, circulation extracting sulfuric acid calcium crystal.
2. the technique that chloride waste water of chloride process titanium dioxide according to claim 1 is produced calcium sulfate crystal whiskers, is characterized in that: the waste water of described contains sodium sulfate contains Na for producing Vanadium Pentoxide in FLAKES
2sO
4waste water, or with producing the byproduct saltcake of sodium dichromate, or produce hypo and contain Na
2sO
4waste liquid through treatment and purification substitute.
3. the technique that chloride waste water of chloride process titanium dioxide according to claim 1 is produced calcium sulfate crystal whiskers, is characterized in that: the acid mother liquid that step obtains after 5. filtering can also return to step 3. for replacing sulfuric acid regulation solution pH value.
4. the technique that chloride waste water of chloride process titanium dioxide according to claim 1 is produced calcium sulfate crystal whiskers, is characterized in that: the waste water that described chloride process titanium dioxide is chloride is that chloride process titanium dioxide contains the waste water that calcium chloride is main component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410061397.5A CN103834989B (en) | 2014-02-24 | 2014-02-24 | The technique that chloride waste water of chloride process titanium dioxide produces calcium sulfate crystal whiskers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410061397.5A CN103834989B (en) | 2014-02-24 | 2014-02-24 | The technique that chloride waste water of chloride process titanium dioxide produces calcium sulfate crystal whiskers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103834989A true CN103834989A (en) | 2014-06-04 |
| CN103834989B CN103834989B (en) | 2016-08-17 |
Family
ID=50798872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410061397.5A Active CN103834989B (en) | 2014-02-24 | 2014-02-24 | The technique that chloride waste water of chloride process titanium dioxide produces calcium sulfate crystal whiskers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103834989B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790041A (en) * | 2015-04-13 | 2015-07-22 | 四川理工学院 | Method for preparing semi-hydrated gypsum whisker from mirabilite and calcium solution |
| CN104894650A (en) * | 2015-05-31 | 2015-09-09 | 四川理工学院 | Method for preparing calcium sulfate dihydrate whisker from mirabilite and calcium water |
| CN105271310A (en) * | 2015-10-13 | 2016-01-27 | 锦州钛业有限公司 | Chlorination-process titanium-white high-salt wastewater comprehensive utilization method |
| CN106746162A (en) * | 2015-11-19 | 2017-05-31 | 中国石油化工股份有限公司 | A kind of processing method of cellulose ethanol production wastewater |
| CN106746156A (en) * | 2015-11-19 | 2017-05-31 | 中国石油化工股份有限公司 | A kind of epoxychloropropane produces the processing method of waste water |
| CN109179618A (en) * | 2018-10-09 | 2019-01-11 | 龙蟒佰利联集团股份有限公司 | A kind of processing method of titanium dioxide wastewater |
| CN110963729A (en) * | 2020-01-03 | 2020-04-07 | 龙蟒佰利联集团股份有限公司 | Method for preparing titanium dioxide byproduct gypsum and reducing standard thickening water consumption |
| CN111547756A (en) * | 2020-05-22 | 2020-08-18 | 重庆盎瑞悦科技有限公司 | Treatment method of calcium chloride waste liquid containing organic matters |
| CN112779604A (en) * | 2021-01-20 | 2021-05-11 | 广西大学 | Process for preparing high-purity calcium sulfate whiskers from iron phosphate production wastewater |
| CN113620492A (en) * | 2021-08-13 | 2021-11-09 | 龙佰集团股份有限公司 | Method for removing TOC in high-salinity water generated by titanium white chloride |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7179438B2 (en) * | 2005-04-20 | 2007-02-20 | Allegheny Energy, Inc. | Methods and apparatus for recovering gypsum and magnesium hydroxide |
| CN101168852A (en) * | 2007-08-31 | 2008-04-30 | 武善东 | Mass production method for calcium sulfate whisker |
| CN101343773A (en) * | 2008-08-26 | 2009-01-14 | 吉林大学 | Preparation of hydrophobic nature calcium sulphate crystal whisker with liquid phase method of sodium sulfate wastewater in situ |
| CN102443710A (en) * | 2011-12-15 | 2012-05-09 | 沈阳化工大学 | Method for treating scrapped molten salt generated in molten salt chlorination production method of TiCl4 |
| CN102765748A (en) * | 2012-07-09 | 2012-11-07 | 沈阳化工大学 | Treatment method for chlorinated waste generated during production of TiC14 |
| CN103014831A (en) * | 2012-12-28 | 2013-04-03 | 殷义甫 | Production method of ultrapure calcium sulfate whiskers |
| CN103447283A (en) * | 2013-08-30 | 2013-12-18 | 漯河兴茂钛业股份有限公司 | Safe disposal method for waste residue produced by production of titanium tetrachloride by using titanium dioxide by chlorination process |
| CN103449495A (en) * | 2013-08-30 | 2013-12-18 | 遵宝钛业有限公司 | Method for preparing calcium chloride by hydrochloric acid recovered from production of titanium tetrachloride |
| CN103540751A (en) * | 2013-10-12 | 2014-01-29 | 攀枝花市仁通钒业有限公司 | Method for treating titanium tetrachloride refining tailings |
| CN103566719A (en) * | 2013-10-28 | 2014-02-12 | 沈阳化工大学 | Method for preparing raw material of desulfurizing agent by using waste chlorination molten salt generated in production of TiCl4 |
-
2014
- 2014-02-24 CN CN201410061397.5A patent/CN103834989B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7179438B2 (en) * | 2005-04-20 | 2007-02-20 | Allegheny Energy, Inc. | Methods and apparatus for recovering gypsum and magnesium hydroxide |
| CN101168852A (en) * | 2007-08-31 | 2008-04-30 | 武善东 | Mass production method for calcium sulfate whisker |
| CN101343773A (en) * | 2008-08-26 | 2009-01-14 | 吉林大学 | Preparation of hydrophobic nature calcium sulphate crystal whisker with liquid phase method of sodium sulfate wastewater in situ |
| CN102443710A (en) * | 2011-12-15 | 2012-05-09 | 沈阳化工大学 | Method for treating scrapped molten salt generated in molten salt chlorination production method of TiCl4 |
| CN102765748A (en) * | 2012-07-09 | 2012-11-07 | 沈阳化工大学 | Treatment method for chlorinated waste generated during production of TiC14 |
| CN103014831A (en) * | 2012-12-28 | 2013-04-03 | 殷义甫 | Production method of ultrapure calcium sulfate whiskers |
| CN103447283A (en) * | 2013-08-30 | 2013-12-18 | 漯河兴茂钛业股份有限公司 | Safe disposal method for waste residue produced by production of titanium tetrachloride by using titanium dioxide by chlorination process |
| CN103449495A (en) * | 2013-08-30 | 2013-12-18 | 遵宝钛业有限公司 | Method for preparing calcium chloride by hydrochloric acid recovered from production of titanium tetrachloride |
| CN103540751A (en) * | 2013-10-12 | 2014-01-29 | 攀枝花市仁通钒业有限公司 | Method for treating titanium tetrachloride refining tailings |
| CN103566719A (en) * | 2013-10-28 | 2014-02-12 | 沈阳化工大学 | Method for preparing raw material of desulfurizing agent by using waste chlorination molten salt generated in production of TiCl4 |
Non-Patent Citations (1)
| Title |
|---|
| 孙洪涛: "氯化法钛白生产装置三废处理工艺改进", 《钢铁钒钛》, vol. 33, no. 6, 31 December 2012 (2012-12-31), pages 35 - 39 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790041B (en) * | 2015-04-13 | 2017-04-19 | 四川理工学院 | Method for preparing semi-hydrated gypsum whisker from mirabilite and calcium solution |
| CN104790041A (en) * | 2015-04-13 | 2015-07-22 | 四川理工学院 | Method for preparing semi-hydrated gypsum whisker from mirabilite and calcium solution |
| CN104894650B (en) * | 2015-05-31 | 2017-08-25 | 四川理工学院 | A kind of method for preparing Dihydrate gypsum whiskers with saltcake and calcium water |
| CN104894650A (en) * | 2015-05-31 | 2015-09-09 | 四川理工学院 | Method for preparing calcium sulfate dihydrate whisker from mirabilite and calcium water |
| CN105271310A (en) * | 2015-10-13 | 2016-01-27 | 锦州钛业有限公司 | Chlorination-process titanium-white high-salt wastewater comprehensive utilization method |
| CN106746162A (en) * | 2015-11-19 | 2017-05-31 | 中国石油化工股份有限公司 | A kind of processing method of cellulose ethanol production wastewater |
| CN106746156A (en) * | 2015-11-19 | 2017-05-31 | 中国石油化工股份有限公司 | A kind of epoxychloropropane produces the processing method of waste water |
| CN106746156B (en) * | 2015-11-19 | 2020-10-16 | 中国石油化工股份有限公司 | Method for treating epichlorohydrin production wastewater |
| CN109179618A (en) * | 2018-10-09 | 2019-01-11 | 龙蟒佰利联集团股份有限公司 | A kind of processing method of titanium dioxide wastewater |
| CN110963729A (en) * | 2020-01-03 | 2020-04-07 | 龙蟒佰利联集团股份有限公司 | Method for preparing titanium dioxide byproduct gypsum and reducing standard thickening water consumption |
| CN111547756A (en) * | 2020-05-22 | 2020-08-18 | 重庆盎瑞悦科技有限公司 | Treatment method of calcium chloride waste liquid containing organic matters |
| CN112779604A (en) * | 2021-01-20 | 2021-05-11 | 广西大学 | Process for preparing high-purity calcium sulfate whiskers from iron phosphate production wastewater |
| CN112779604B (en) * | 2021-01-20 | 2024-05-28 | 广西大学 | Process for preparing high-purity calcium sulfate whisker from iron phosphate production wastewater |
| CN113620492A (en) * | 2021-08-13 | 2021-11-09 | 龙佰集团股份有限公司 | Method for removing TOC in high-salinity water generated by titanium white chloride |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103834989B (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103834989A (en) | Process of producing calcium sulfate crystal whiskers from chloride-containing wastewater generated in chloride process titanium dioxide production | |
| CN100424026C (en) | Method for combined production of gypsum, active carbon, and copperas by using waste sulfuric acid and carbide slag | |
| CN101381091B (en) | Waste molten salt processing method | |
| CN106277005B (en) | A kind of method that ice crystal, calcium carbonate and sodium sulphate are reclaimed in the resource from calcium fluoride sludge | |
| CN101618880A (en) | Method for synthesizing pure 4A zeolite, P-shaped zeolite and sodalite with concavo-convex attapulgite clay | |
| CN107089675A (en) | A kind of new method for the distilled ammonia wastewater recycling that ammonia-soda process soda ash is discharged | |
| CN108862353B (en) | Process method for preparing and purifying calcium chloride by using chlor-alkali waste salt mud | |
| CN103214077A (en) | Preparation method of byproduct high-purity calcium sulphate by deep purification of nitrate aqueous solution | |
| CN102874851A (en) | Method of utilizing brine to coproduce magnesium hydroxide and calcium sulfate whisker | |
| CN104512951A (en) | Method for co-production of ploysilicate aluminium ferric sulphate and waste water treatment powder by PAC (poly aluminum chloride) residues | |
| CN109133459A (en) | A kind of desulfurization wastewater recycling processing method | |
| CN101475328B (en) | Gypsum rotating crystal excitant and use for producing construction gypsum from marine gypsum | |
| CN113816399A (en) | Method for recycling NaCl and recycling Fe, Mn and Mg resources in titanium slag | |
| CN108862729A (en) | A kind of method of chlor-alkali salt sludge sub-prime recycling comprehensive utilization | |
| CN101905892A (en) | Process method for preparing 4A zeolite by recycling silica slag and aluminium slag | |
| CN112520761A (en) | System and method for high-efficiency recycling of flue gas desulfurization by magnesium method | |
| Mirzakulov et al. | PROCESSING BRINE OF SALT LAKES OF KARAKALPAKSTAN IN PRODUCTS OF ECONOMIC PURPOSE. | |
| CN112850772A (en) | Method for preparing calcium sulfate by using calcium-containing waste liquor of fluorite ore | |
| CN104445337A (en) | Method for preparing low-chloride gypsum by using ammonia-soda distillation waste liquid and brine | |
| CN106277478A (en) | Sulfur acid sodium waste water treatment process in precipitated silica production process | |
| CN101319382B (en) | Calcium sulphate crystal whisker preparation method with sea water bittern as raw material | |
| CN109734106A (en) | A method of high concentration solution of sodium bisulfite is prepared using trade waste | |
| CN109368850A (en) | A kind of desulfurization wastewater recycling treatment system and application method | |
| CN110408999A (en) | A method of calcium sulfate crystal whiskers are produced using soda ash evaporated waste ammonia liquid | |
| CN106379923B (en) | A kind of technique of waste residue production highly pure active magnesia using smelting magnesium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 121005 Jin Ti Road 1, Taihe District, Jinzhou, Liaoning Patentee after: Jinzhou titanium Limited by Share Ltd Address before: 121005 Taihe District, Liaoning City, Jinzhou province No. 59 Patentee before: Jinzhou Titanium Industry Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 121005 1 Jintai Road, Taihe District, Jinzhou, Liaoning Patentee after: CITIC titanium Limited by Share Ltd Address before: 121005 1 Jintai Road, Taihe District, Jinzhou, Liaoning Patentee before: Jinzhou titanium Limited by Share Ltd |