CN107188127A - A kind of method that utilization chlorination spent acid prepares titanium dioxide crystal seed - Google Patents
A kind of method that utilization chlorination spent acid prepares titanium dioxide crystal seed Download PDFInfo
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- CN107188127A CN107188127A CN201710524170.3A CN201710524170A CN107188127A CN 107188127 A CN107188127 A CN 107188127A CN 201710524170 A CN201710524170 A CN 201710524170A CN 107188127 A CN107188127 A CN 107188127A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/01—Chlorine; Hydrogen chloride
- C01B7/07—Purification ; Separation
- C01B7/0706—Purification ; Separation of hydrogen chloride
- C01B7/0712—Purification ; Separation of hydrogen chloride by distillation
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
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Abstract
The invention discloses a kind of method that utilization chlorination spent acid prepares titanium dioxide crystal seed, belong to titanium dioxide crystal seed preparing technical field.The operation that the present invention prepares titanium dioxide crystal seed is divided into the concentration of waste hydrochloric acid, three parts of the configuration of crystal seed hydrochloric acid and the preparation of titanium dioxide crystal seed, hydrochloric acid solution after being concentrated after agricultural chemicals waste hydrochloric acid is purified, absorbed, again by technical hydrochloric acid and hydrochloric acid solution mixed configuration according to a certain percentage after concentration, configuration gained crystal seed hydrochloric acid is used for sour molten process prepared by titanium dioxide crystal seed.The present invention is using the by-product abraum salt acid of agricultural chemicals, and its is cheap, that is, reduces the expense that agricultural chemicals producer handles spent acid, and the cost that titanium dioxide producer buys technical hydrochloric acid is reduced again, and its equipment cost is relatively low, and corrosion resistance is strong, and service life is long.
Description
Technical field
The present invention relates to titanium dioxide crystal seed preparing technical field, prepared more specifically to one kind using chlorination spent acid
The method of titanium dioxide crystal seed.The present invention by being concentrated to agricultural chemicals spent acid, and carried out with it is sour it is molten obtain titanium dioxide crystal seed, reach
Reduction agricultural chemicals producer and the purpose of titanium dioxide producer production cost are arrived.
Background technology
Titanium dioxide is a kind of important Chinese white and porcelain glaze, have compared with other Chinese whites superior whiteness,
Tinting strength, tinting power, covering power, weatherability, heat resistance and chemical stability, particularly no toxicity.Titanium white production technique belongs to fine
Chemical industry scope, continues to optimize production technology, and in the case where not influenceing titanium white powder yield and quality, titanium white is reduced to greatest extent
The production cost of powder, is always the target that titanium white production producer is pursued.
In the agricultural chemicals such as preparation technology of Rogor, glyphosate etc., it is that acid content about exists to produce most accessory substances
15%-18% waste hydrochloric acid, because acid content is stronger, so can not directly discharge, agricultural chemicals producer is handling the by-product abraum salt
When sour, it usually needs neutralized with substantial amounts of alkali.And due to containing the impurity such as a large amount of NaCl in waste hydrochloric acid, in other application
Field can not directly be utilized.So, current agricultural chemicals producer, except the method using alkali neutralization, is exactly to provide funds to ask relevant manufacturers side
Processing is helped, for pesticide producing producer, the processing cost to waste hydrochloric acid undoubtedly can be very high.
For the process problem of spent acid in agricultural chemicals accessory substance, Patent No. CN200810233979.1, invention and created name
For：The technique that a kind of waste acid from glyphosate production is reclaimed, this application case 15%-20% using in glyphosate production condensation spent acid as
Raw material, the two-stage film-falling absorption tower of the two-in-one device by chlor-alkali production system is condensed into 31% hydrochloric acid, returns again to agricultural chemicals life
The glyphosate dehydrogenation section acidifying post of production system and condensation workshop section (phosphorous test) use, and to reach reduction production cost, subtract
The purpose of light environmental protection pressure.This application case realizes recycling for waste acid resource, a kind of good cost efficiency of can yet be regarded as
Scheme, if but want to realize that the program needs the supporting a set of waste acid recovery system of reaching the standard grade of agricultural chemicals producer, and not all agricultural chemicals producer
It can undertake or be ready to undertake this extra expenditure.
Patent No. CN201510938229.4, invention and created name is：A kind of non-blast furnace titaniferous slag sulphur of spent acid self-loopa
The method that acid system produces titanium white；This application case produces Producing Titanium Dioxide process using the non-blast furnace smelting titanium slag of vanadium titano-magnetite as raw material
The spent acid gone out carries out mixed processing with non-blast furnace titaniferous slag, obtains the relatively low pretreatment titanium slag of iron content, aluminium, magnesium, pretreatment titanium slag is again
Cured with concentrated sulfuric acid acidolysis, then produce titanium white through processes such as water logging, concentration, hydrolysis, roastings, spent acid returns to circulation and made after hydrolysis
With.The maximum of this application case is characterized in that titanium slag is pre-processed using titanium white waste acid, be both stripped of most of aluminium in titanium slag,
Magnesium addition, eliminates the influence of the impurity to Producing Titanium Dioxide such as aluminium, magnesium in titanium slag, simplifies ilmenite sulfuric acid process purification process,
Laid a good foundation for production high quality titanium white；The direct circulation for realizing titanium dioxide hydrolysis spent acid simultaneously is utilized, but this application case is first
Titanium white is produced first with non-blast furnace smelting titanium slag, comparing in actual production process is restricted, and titanium white is prepared not using the technique
Main flow can be turned into, secondly, the whole preparation technology of this application case is also cumbersome, and cost performance is relatively low.
And prepared on industrial waste acid is applied into titanium dioxide, Application No. CN201510818825.9 patent, also
Disclosing a kind of chlorination spent acid is used for the method for titanium dioxide coating；This application case passes through to washing the thick of recovery using chlorinated exhaust
Hydrochloric acid stand, precipitated after impurity elimination, dilution, and passes through the technique adjustment during titanium dioxide coating, it is to avoid other impurities
Deposited on titanium dioxide, obtain superior in quality titanium dioxide coated product.The crude salt acid of commercial recovery is applied to by this application case
It has been a kind of good refuse reclamation scheme, but how to develop industrial waste acid in titanium dioxide in titanium dioxide coating process
Other values in manufacturing process, such as prepare titanium dioxide crystal seed using waste hydrochloric acid, and it is effective not to be found through retrieval
Scheme, it is still necessary to further research.
The content of the invention
1. the invention technical problem to be solved
Present invention aims at solve pesticide producing by-product abraum salt acid in the prior art to have serious waste phenomenon, it is impossible to
Obtaining good recycling problem, there is provided a kind of method that utilization chlorination spent acid prepares titanium dioxide crystal seed；Using the present invention
The technical scheme of offer, pesticide producing by-product abraum salt acid by concentration, absorb, concentration reaches 20%-22%, then with Nacl
Acid is made into the hydrochloric acid that concentration is 25%-28%, the preparation for titanium dioxide crystal seed；Titanium white can be greatly lowered using this hydrochloric acid
Powder production cost；And the production system provided using the present invention is corrosion-resistant, use time is long, easy to maintenance, with low cost.
2. technical scheme
To reach above-mentioned purpose, the technical scheme that the present invention is provided is：
A kind of utilization chlorination spent acid method for preparing titanium dioxide crystal seed of the present invention, operation is divided into the concentrating of waste hydrochloric acid, brilliant
The configuration of kind hydrochloric acid and three parts of the preparation of titanium dioxide crystal seed, are concentrated after agricultural chemicals waste hydrochloric acid is purified, absorbed
Hydrochloric acid solution, then by hydrochloric acid solution after technical hydrochloric acid and concentration according to 1 afterwards:1-2:1 ratio mixed configuration, configuration gained crystal seed
It is used for sour molten process prepared by titanium dioxide crystal seed with hydrochloric acid.
Further, the production system for preparing titanium dioxide crystal seed is configured including waste hydrochloric acid upgrading unit, crystal seed with hydrochloric acid
Unit and titanium dioxide crystal seed preparation unit, described waste hydrochloric acid upgrading unit are connected with crystal seed with hydrochloric acid dispensing unit, waste hydrochloric acid
Upgrading unit inputs crystal seed hydrochloric acid dispensing unit, crystal seed hydrochloric acid dispensing unit after agricultural chemicals waste hydrochloric acid is purified, absorbed
Output channel be connected with the sour molten pot of titanium dioxide crystal seed preparation unit, the hydrochloric acid that crystal seed is completed with hydrochloric acid configuration of described dispensing unit is defeated
Enter in sour molten pot.
Further, described waste hydrochloric acid upgrading unit includes abraum salt acid storage tank, evaporator, gas-liquid separator, absorption
Tower and salt acid storage tank, abraum salt acid storage tank are connected with evaporator, are connected at the top of evaporator with gas-liquid separator, gas-liquid separator top
It is connected with absorption tower, absorbs tower bottom and be connected with salt acid storage tank.
Further, the horizontal level of evaporator is higher than abraum salt acid storage tank, and base of evaporator is connected with pipeline to abraum salt
Acid storage tank；Gas-liquid separator bottom is also connected with pipeline to abraum salt acid storage tank.
Further, described crystal seed includes hydrochloric acid make-up tank, technical hydrochloric acid storage tank and crystal seed with hydrochloric acid dispensing unit
Salt acid storage tank is used, salt acid storage tank is connected with hydrochloric acid make-up tank, technical hydrochloric acid storage tank is also connected with hydrochloric acid make-up tank, hydrochloric acid make-up tank
Lower end is connected with crystal seed with salt acid storage tank.
Further, described titanium dioxide crystal seed preparation unit include sour molten pot, sour molten filter press, sour molten pulping tank,
Metatitanic acid storage tank, metatitanic acid measuring tank, alkali soluble pot, alkali soluble filter press, alkali soluble pulping tank；According to the conveying direction of material, inclined titanium
Acid storage tank, metatitanic acid measuring tank, alkali soluble pot, alkali soluble filter press, alkali soluble pulping tank, sour molten pot, sour molten filter press, sour molten pulping tank
It is sequentially connected, crystal seed is connected with salt acid storage tank by crystal seed hydrochloric acid measuring tank with sour molten pot.
Further, the concentration of agricultural chemicals waste hydrochloric acid and crystal seed are with the configuration detailed process of hydrochloric acid：
Step 1: opening evaporator, control evaporator negative pressure is between 300-400KPa.
Step 2: opening abraum salt acid storage tank transfering material pump, waste hydrochloric acid is supplied to evaporator.
Step 3: after for sour a period of time, evaporator starts the mixed gas for HCl and vapor to gas-liquid separator；
Step 4: evaporator is to opening absorption tower after gas-liquid separator steam supply, steam supply for a period of time after gas-liquid separator liquid
Body is separated out, and goes to abraum salt acid storage tank；Gas-liquid separator to absorption tower steam supply for a period of time after, the concentration salt that absorption tower is absorbed
Acid goes to salt acid storage tank.
Step 5: concentrating hydrochloric acid volume reaches 50m in salt acid storage tank3Turn 30m later3To hydrochloric acid make-up tank；Again from technical hydrochloric acid
Storage tank turns 30m3-60m3Technical hydrochloric acid surveys concentration of hydrochloric acid to hydrochloric acid make-up tank after stirring a period of time；Concentration reaches 25%-31%
Go to crystal seed hydrochloric acid storage tank for standby use.
Further, the detailed process of titanium dioxide crystal seed preparation is：
Step 1: the metatitanic acid prepared is gone into metatitanic acid measuring tank from metatitanic acid storage tank, 60-80 DEG C is warming up to；
Step 2: adding the liquid caustic soda that certain volume mass percent concentration is 49% in alkali soluble pot, 75-95 DEG C is warming up to；
Step 3: the metatitanic acid being had warmed up in metatitanic acid measuring tank is transferred into alkali soluble pot, temperature rises to 108 DEG C, is aged 2h；
Step 4: adding sand filtration in the addition of alkali soluble pot and the isometric desalted water of metatitanic acid, temperature reduction, alkali soluble pot chuck
Water, 60-70 DEG C is cooled to by slurry；
Step 5: the slurry after the completion of alkali soluble in alkali soluble pot is transferred into alkali soluble filter press, deionized water washing, until filtrate
Middle NaOH content is less than 5g/L, and filtrate is transferred to filtrate receiver；
Step 6: slurry is transferred to alkali soluble pulping tank in alkali soluble filter press, the mass ratio of alkali soluble pulping tank reclaimed water and slurry is
7:1, lasting stirring a period of time；
Step 7: the slurry of alkali soluble pulping tank is gone into sour molten pot, add watery hydrochloric acid molten to acid from crystal seed hydrochloric acid measuring tank
Pot, adjusts pH<3.1, stir and add watery hydrochloric acid to ensure pH again after a period of time<3.1, it is warming up to 40-50 DEG C；
Step 8: the slurry of sour molten pot is warming up into 60-65 DEG C, it is 0-1.0 that salt acid for adjusting pH is added again；It is continuously heating to
100-110 DEG C, it is aged 120 minutes；
Step 9: the slurry that sour molten pot is prepared goes to sour molten filter press, deionized water washing, until NaCl in filtrate
Content is less than 1g/L；
Step 10: sour molten filter press blanking, the slurrying in sour molten pulping tank, it is 110-120g/L to control total titanium concentration, i.e.,
It can obtain titanium dioxide crystal seeds of rutile.
Further, with 1 DEG C/min increasing extent of temperature in acid dissolution, sour solubility temperature is warming up to for 100-110 DEG C, is in
Fluidized state.
Further, require that it is that total titanium concentration is more than 98.5% to survey rutile conversion ratio R after the completion of acid dissolution
110-120g/L, then slurry is gone into sour molten filter press.
3. beneficial effect
The technical scheme provided using the present invention, compared with existing known technology, with following remarkable result：
(1) method that a kind of utilization chlorination spent acid of the invention prepares titanium dioxide crystal seed, its waste hydrochloric acid steams by evaporator
Hair, the gas evaporated carries out gas-liquid separation by gas-liquid separator, and the HCl gases isolated are transferred to absorption tower, absorption tower profit
Make absorbent with the deionized water for not bringing any impurity into, pass through it is above-mentioned it is simple concentration purification, absorb, you can obtain purity compared with
High hydrochloric acid, can only contain a small amount of NaCl, but NaCl impurity does not influence the preparation of titanium dioxide crystal seed, its activity not influenceed, completely
It can be used for the preparation of titanium dioxide crystal seed；
(2) method that a kind of utilization chlorination spent acid of the invention prepares titanium dioxide crystal seed, in view of concentration of hydrochloric acid after concentration
20%-22% can be reached, it is impossible to meet requirement of the crystal seed preparation to concentration of hydrochloric acid, and hydrochloric acid after concentration is processed further again,
The cost that needs is higher, technique is also more complicated, and cost performance is not high；It is changed to not exclusively using the hydrochloric acid being concentrated to give, but sets
One crystal seed hydrochloric acid dispensing unit, by by technical hydrochloric acid and the hydrochloric acid mixture being concentrated to give, to obtain suitable titanium white powder crystal
The hydrochloric acid prepared is planted, the cost of titanium dioxide crystal seed preparation is further reduced；
(3) method that a kind of utilization chlorination spent acid of the invention prepares titanium dioxide crystal seed, agricultural chemicals waste hydrochloric acid is by simple
Concentration purification, absorption, mixture can obtain hydrochloric acid prepared by suitable titanium dioxide crystal seed, and technique is simple；Agricultural chemicals waste hydrochloric acid can be with
Relatively low price is obtained even without any cost from pesticide producing producer, on the one hand reduces the purchasing of raw materials of titanium dioxide producer
Cost, on the other hand decreases agricultural chemicals producer and carries out neutralization discharge using liquid caustic soda, considerably reduce pesticide producing cost；
(4) a kind of utilization chlorination spent acid of the invention prepares the production system of titanium dioxide crystal seed, simple in construction, by turning material
Pump carries out material conveying, control of being more convenient for；Evaporator, gas-liquid separator set reflux, are more conducive to environmentally friendly and material
Recycle；The concentration of the waste hydrochloric acids such as abraum salt acid storage tank, evaporator, gas-liquid separator, equipment for purifying inner materials use graphite, energy
Enough avoid corrosion, extension device service life.
Brief description of the drawings
Fig. 1 is prepares the operation system structure schematic diagram of titanium dioxide crystal seed in the present invention using agricultural chemicals waste hydrochloric acid；
Fig. 2 is prepares the flow chart of titanium dioxide crystal seed using chlorination spent acid in the present invention.
1st, abraum salt acid storage tank；2nd, evaporator；3rd, gas-liquid separator；4th, absorption tower；5th, salt acid storage tank；6th, hydrochloric acid make-up tank；
7th, technical hydrochloric acid storage tank；8th, crystal seed salt acid storage tank；9th, crystal seed hydrochloric acid measuring tank；10th, sour molten pot；11st, sour molten filter press；
12nd, sour molten pulping tank；13rd, metatitanic acid storage tank；14th, metatitanic acid measuring tank；15th, alkali soluble pot；16th, alkali soluble filter press；17th, alkali soluble system
Stock tank；18th, deionized water storage tank.
Embodiment
To further appreciate that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
A kind of use agricultural chemicals waste hydrochloric acid of the present embodiment prepares the production system of titanium dioxide crystal seed, agricultural chemicals spent acid is carried out dense
Contracting is handled, including purification, absorption, had both eliminated impurity in waste hydrochloric acid, its concentration can be improved again, reaches prepared by titanium dioxide crystal seed
Condition；Insecticide factory's processing waste hydrochloric acid cost can be reduced, the cost that titanium dioxide producer buys technical hydrochloric acid can be reduced again.Waste hydrochloric acid
Concentration principle is：Reach that hydrogen chloride gas is shifted from liquid phase to gas phase by adjusting evaporating pressure.
With reference to Fig. 1, the production system of the present embodiment specifically includes abraum salt acid storage tank 1, evaporator 2, gas-liquid separator 3, suction
Receive tower 4, salt acid storage tank 5, hydrochloric acid make-up tank 6, technical hydrochloric acid storage tank 7, crystal seed salt acid storage tank 8, crystal seed hydrochloric acid measuring tank 9,
The molten pot 10 of acid, sour molten filter press 11, sour molten pulping tank 12, metatitanic acid storage tank 13, metatitanic acid measuring tank 14, alkali soluble pot 15, alkali soluble
Filter press 16, alkali soluble pulping tank 17 and deionized water storage tank 18.
The described side of abraum salt acid storage tank 1 is directly connected with pump with evaporator 2, and the horizontal level of evaporator 2 is higher than useless
Salt acid storage tank 1, the bottom of evaporator 2 is connected with pipeline to abraum salt acid storage tank 1, and evaporator 2 contains a small amount of HCl dilute salt after the completion of evaporating
Acid is transferred to abraum salt acid storage tank 1 by Action of Gravity Field through the bottom pipe of evaporator 2.The top of evaporator 2 is connected with gas-liquid separator 3,
The gas of evaporator 2 goes to gas-liquid separator 3 by pipeline, and the top of gas-liquid separator 3 is connected with absorption tower 4, gas-liquid separator 3
In the HCl gases isolated be transferred to absorption tower 4 from the top of gas-liquid separator 3.The bottom of gas-liquid separator 3 is connected with pipeline to waste hydrochloric acid
Storage tank 1, liquid goes to abraum salt acid storage tank 1 by Action of Gravity Field from the outflow of the bottom pipe of gas-liquid separator 3.
The solvent on absorption tower 4 is deionized water, and the deionized water is added by the deionized water storage tank 18 on the top of absorption tower 4
Enter, make absorbent for deionized water to absorption tower 4, and do not bring any impurity into.The bottom of absorption tower 4 is connected with salt acid storage tank 5,
Hydrochloric acid after absorption is transferred to salt acid storage tank 5.Hydrochloric acid after absorption be in salt acid storage tank 5 HCl concentration about 20%-22%'s
Hydrochloric acid solution, because the HCl gases of absorption contain a small amount of vapor, vapor can carry a small amount of NaCl, that is, the salt after absorbing
Acid can contain a small amount of NaCl.
Herein what deserves to be explained is, prepared by the crystal seed of titanium dioxide need to use substantial amounts of hydrochloric acid, it is desirable to which HCl concentration is in 25%-
31%.And in titanium dioxide seed crystal production process, first step alkali soluble can remain substantial amounts of liquid caustic soda, can have a small amount of liquid after washing
Alkali, can produce the higher NaCl of concentration, that is to say, that the hydrochloric acid after absorption contains a small amount of NaCl not with hydrochloric acid reaction when sour molten
Influence the preparation of crystal seed.The present embodiment prepares titanium dioxide crystal seed using agricultural chemicals waste hydrochloric acid, and agricultural chemicals waste hydrochloric acid can be with relatively low valency
Lattice are obtained even without any cost from pesticide producing producer, but because the abraum salt acid concentration of recovery is not enough, and containing a certain amount of
NaCl, it is impossible to directly use, in addition it is also necessary to by further processing, improve abraum salt acid concentration, reduce NaCl contents, be applicable it
In the preparation of titanium dioxide crystal seed.
Described salt acid storage tank 5 is connected with hydrochloric acid make-up tank 6, is provided between salt acid storage tank 5 and hydrochloric acid make-up tank 6
Pump, hydrochloric acid make-up tank 6 is gone to by pump by the low-concentration hcl in salt acid storage tank 5.Hydrochloric acid make-up tank 6 is stored up with technical hydrochloric acid simultaneously
Groove 7 is connected, and pump is also equipped between hydrochloric acid make-up tank 6 and technical hydrochloric acid storage tank 7, by pump by the work in technical hydrochloric acid storage tank 7
Industry hydrochloric acid goes to hydrochloric acid make-up tank 6, and the inside of hydrochloric acid make-up tank 6 is provided with agitator, the salt of concentration is prepared for preparing suitable crystal seed
Crystal seed is according to 1 with technical hydrochloric acid with the hydrochloric acid after concentration with hydrochloric acid in acid, the present embodiment:1-2:1 ratio mixed configuration.
The lower end of hydrochloric acid make-up tank 6 is connected with crystal seed salt acid storage tank 8, and hydrochloric acid make-up tank 6 and crystal seed are between salt acid storage tank 8
Pump is provided with, it is standby that the suitable concentration hydrochloric acid prepared goes to crystal seed salt acid storage tank 8, so far crystal seed hydrochloric acid configuration is finished.
Abraum salt acid storage tank 1, evaporator 2, gas-liquid separator 3, absorption tower 4, salt acid storage tank 5, hydrochloric acid make-up tank 6, industry in the present embodiment
Its inner materials selects graphite with salt acid storage tank 8 for salt acid storage tank 7 and crystal seed, prevents corrosion.
According to the conveying direction of material, described metatitanic acid storage tank 13, metatitanic acid measuring tank 14, alkali soluble pot 15, alkali soluble pressure
Filter 16, alkali soluble pulping tank 17, sour molten pot 10, sour molten filter press 11, sour molten pulping tank 12 are sequentially connected, crystal seed salt acid storage tank
8 are connected through crystal seed with hydrochloric acid measuring tank 9 with sour molten pot 10.There is steam pipe to be heated up for steam in alkali soluble pot 15, and alkali soluble pot 15
Jacketed, can steam heating or sand leaching water cooling, and equipped with stirring.Crystal seed hydrochloric acid measuring tank 9 and the inside material of sour molten pot 10
Matter also uses graphite, and sour molten pot 10 is with stirring.The metatitanic acid prepared is gone to metatitanic acid measuring tank 14 by metatitanic acid storage tank 13,
Metatitanic acid is at the appointed time transferred to alkali soluble pot 15 in section by metatitanic acid measuring tank 14 according to actual needs, and alkali soluble pot 15 is complete by alkali soluble
Slurry after is transferred to alkali soluble filter press 16.The blanking of alkali soluble filter press 16 is to alkali soluble pulping tank 17, and alkali soluble pulping tank 17 is by slurry
Sour molten pot 10 is gone to, while watery hydrochloric acid is added sour molten pot 10 by crystal seed with hydrochloric acid measuring tank 9；The molten pot 10 of acid is again by the slurry prepared
Material goes to sour molten filter press 11, the sour molten blanking of filter press 11, the slurrying in sour molten pulping tank 12, you can obtain crystal seeds of rutile.
The production system provided using the present embodiment, use agricultural chemicals waste hydrochloric acid prepare the detailed process of titanium dioxide crystal seed for：
Step 1: opening evaporator 2, the control negative pressure of evaporator 2 is in the range of 370-380Kpa.
Step 2: opening the transfering material pump of abraum salt acid storage tank 1, waste hydrochloric acid is supplied to evaporator 2.
Step 3: after 5min, evaporator 2 starts the mixed gas for HCl and vapor to gas-liquid separator 3；Evaporator 2
Bottom has a small amount of watery hydrochloric acid containing HCl to be expelled to abraum salt acid storage tank 1.
Step 4: evaporator 2 is given after the steam supply of gas-liquid separator 3, gas-liquid separator 3 after absorption tower 4, steam supply 10min is opened
Liquid is separated out, and goes to abraum salt acid storage tank 1, and gas-liquid separator 3 is to after the steam supply 30min of absorption tower 4, after absorption tower 4 is absorbed
Concentrating hydrochloric acid goes to salt acid storage tank 5.
Step 5: hydrochloric acid volume reaches 50m in salt acid storage tank 53Turn 30m later3To hydrochloric acid make-up tank 6；Afterwards again from Nacl
7 turns of 55m of acid storage tank3Technical hydrochloric acid stirs 10min, surveys its concentration to hydrochloric acid make-up tank 6；Concentration is gone to after reaching 27.5%
Crystal seed is standby with salt acid storage tank 8.
Step 6: being 7.5m by the volume prepared3Metatitanic acid go to metatitanic acid measuring tank 14 from metatitanic acid storage tank 13,
It is warming up to 76 DEG C.
Step 7: alkali soluble pot 15 adds 5.2m3Mass percent is 49% liquid caustic soda, is warming up to 90 DEG C.
Step 8: the metatitanic acid being had warmed up in metatitanic acid measuring tank 14 is transferred into alkali soluble 15 (jacketeds) of pot, temperature in 30min
Degree rises to 108 DEG C, is aged 2h.
Step 9: interior add of alkali soluble pot 15 reduces with the isometric desalted water of metatitanic acid, temperature, sand leaching water is added in chuck,
Slurry is cooled to 68 DEG C.
Step 10: the slurry after the completion of alkali soluble in alkali soluble pot 15 is transferred into alkali soluble filter press 16, wash, until surveying in filtrate
NaOH content is 3.5g/L, and filtrate is transferred to filtrate receiver.
Step 11: blanking is to alkali soluble pulping tank 17, the mass ratio of the reclaimed water of alkali soluble pulping tank 17 and slurry is 7:1, stirring
30min。
Step 12: the slurry of alkali soluble pulping tank 17 is turned into 15m3To sour molten pot 10, added from crystal seed with hydrochloric acid measuring tank 9
1.2m3Watery hydrochloric acid to sour molten pot 10, regulation pH is 3.0, after stirring 10min again plus watery hydrochloric acid 0.1m3, it is 2.9 to survey pH, heating
To 48 DEG C.
Step 13: the slurry to sour molten pot 10 is warming up to 60 DEG C, hydrochloric acid, about 1.9m are added again3, it is 0.9 to adjust pH；Beat
Open steam valve and be continuously heating to 107 DEG C of boilings, 1 DEG C/min of programming rate is aged 120 minutes.
Step 14: it is 116g/L to survey 99.2%, total titanium concentration.
Step 15: the slurry that sour molten pot 10 is prepared goes to sour molten filter press 11, washing remove unreacted hydrochloric acid,
The NaCl that the NaOH remained after NaCl and alkali soluble that concentrating hydrochloric acid is brought into is generated with hydrochloric acid reaction, until NaCl contents are in filtrate
0.6g/L。
Step 16: the sour blanking of molten filter press 11, the slurrying in sour molten pulping tank 12, total titanium concentration is 115g/L, you can
Obtain titanium dioxide crystal seeds of rutile.
The crystal seeds of rutile that the present embodiment slurrying is obtained is, by deionization, can be applied directly to salt treatment process, is saved
Go crystal seed in traditional handicraft to be added to the energy consumption that hydrolyzing process need to be produced by follow-up multistage manufacturing, reduce cost.Obtain
Titanium dioxide crystal seeds of rutile is 4%-7% in the addition of salt treatment process.
Embodiment 2
A kind of use agricultural chemicals waste hydrochloric acid of the present embodiment prepares the production system of titanium dioxide crystal seed, basic be the same as Example 1, sheet
Embodiment use agricultural chemicals waste hydrochloric acid prepare the detailed process of titanium dioxide crystal seed for：
Step 1: abraum salt acid storage tank 1 supplies waste hydrochloric acid by transfering material pump to evaporator 2, the negative pressure of evaporator 2 is in 350-360KPa
Between fluctuate.
Step 2: evaporator 2 gives mixed gas of the gas-liquid separator 3 for HCl and vapor；The bottom of evaporator 2 has on a small quantity
Watery hydrochloric acid containing HCl is expelled to abraum salt acid storage tank 1.
Step 3: opening absorption tower 4 after the steam supply of gas-liquid separator 3, the liquid of gas-liquid separator 3 is separated out, and goes to waste hydrochloric acid
Storage tank 1, gas-liquid separator 3 is to absorption tower steam supply, and the concentrating hydrochloric acid after absorption tower 4 is absorbed goes to salt acid storage tank 5.
Step 4: hydrochloric acid volume reaches 50m in salt acid storage tank 53Turn 30m later3To hydrochloric acid make-up tank 6；Afterwards again from Nacl
7 turns of 58m of acid storage tank3Technical hydrochloric acid stirs 10min, surveys its concentration to hydrochloric acid make-up tank 6；Concentration goes to crystalline substance after reaching 28%
Plant standby with salt acid storage tank 8.
Step 5: by the 7.5m prepared3Metatitanic acid goes to metatitanic acid measuring tank 14 from metatitanic acid storage tank 13, is warming up to 76
℃。
Step 6: alkali soluble pot 15 plus 5.2m3Mass percent is 49% liquid caustic soda, is warming up to 90 DEG C.
Step 7: the metatitanic acid being had warmed up in metatitanic acid measuring tank 14 is transferred into alkali soluble 15 (jacketeds) of pot, temperature in 30min
Degree rises to 108 DEG C, is aged 2h.
Step 8: interior add of alkali soluble pot 15 reduces with the isometric desalted water of metatitanic acid, temperature, sand leaching water is added in chuck,
Slurry is cooled to 65 DEG C.
Step 9: the slurry after the completion of alkali soluble in alkali soluble pot 15 is transferred into alkali soluble filter press 16, wash, until surveying in filtrate
NaOH content is 2.3g/L, and filtrate is transferred to filtrate receiver.
Step 10: blanking is to alkali soluble pulping tank 17, the mass ratio of the reclaimed water of alkali soluble pulping tank 17 and slurry is 7:1, stirring
30min。
Step 11: the slurry of alkali soluble pulping tank 17 is turned into 15m3To sour molten pot 10, added from crystal seed with hydrochloric acid measuring tank 9
1.3m3Watery hydrochloric acid to sour molten pot 10, regulation pH is 2.5, and it is 2.8 to survey pH again after stirring 10min, is warming up to 46 DEG C.
Step 12: the slurry to sour molten pot 10 is warming up to 60 DEG C, hydrochloric acid 2.0m is added again3, it is 0.7 to adjust pH；Open and steam
Steam valve door is continuously heating to 106 DEG C of boilings, and 1 DEG C/min of programming rate is aged 120 minutes.
Step 13: it is that 99.5%, total titanium concentration is 115g/L to survey conversion ratio R.
Step 14: the slurry that sour molten pot 10 is prepared goes to sour molten filter press 11, washing, until NaCl contains in filtrate
Measure as 0.4g/L.
Step 15: the sour blanking of molten filter press 11, the slurrying in sour molten pulping tank 12, total titanium concentration is 116g/L, you can
Obtain titanium dioxide crystal seeds of rutile.
Embodiment 3
A kind of use agricultural chemicals waste hydrochloric acid of the present embodiment prepares the production system of titanium dioxide crystal seed, basic be the same as Example 1, sheet
Embodiment use agricultural chemicals waste hydrochloric acid prepare the detailed process of titanium dioxide crystal seed for：
Step 1: abraum salt acid storage tank 1 supplies waste hydrochloric acid by transfering material pump to evaporator 2, the negative pressure of evaporator 2 is in 300-400KPa
Between fluctuate.
Step 2: evaporator 2 gives mixed gas of the gas-liquid separator 3 for HCl and vapor；The bottom of evaporator 2 has on a small quantity
Watery hydrochloric acid containing HCl is expelled to abraum salt acid storage tank 1.
Step 3: opening absorption tower 4 after the steam supply of gas-liquid separator 3, the liquid of gas-liquid separator 3 is separated out, and goes to waste hydrochloric acid
Storage tank 1, gas-liquid separator 3 is to absorption tower steam supply, and the concentrating hydrochloric acid after absorption tower 4 is absorbed goes to salt acid storage tank 5.
Step 4: hydrochloric acid volume reaches 50m in salt acid storage tank 53Turn 30m later3To hydrochloric acid make-up tank 6；Afterwards again from Nacl
7 turns of 30m of acid storage tank3Technical hydrochloric acid stirs 10min, surveys its concentration to hydrochloric acid make-up tank 6；Concentration goes to crystalline substance after reaching 25%
Plant standby with salt acid storage tank 8.
Step 5: by the 7.5m prepared3Metatitanic acid goes to metatitanic acid measuring tank 14 from metatitanic acid storage tank 13, is warming up to 80
℃。
Step 6: alkali soluble pot 15 plus 5.2m3Mass percent is 49% liquid caustic soda, is warming up to 95 DEG C.
Step 7: the metatitanic acid being had warmed up in metatitanic acid measuring tank 14 is transferred into alkali soluble 15 (jacketeds) of pot, temperature in 30min
Degree rises to 108 DEG C, is aged 2h.
Step 8: interior add of alkali soluble pot 15 reduces with the isometric desalted water of metatitanic acid, temperature, sand leaching water is added in chuck,
Slurry is cooled to 60 DEG C.
Step 9: the slurry after the completion of alkali soluble in alkali soluble pot 15 is transferred into alkali soluble filter press 16, wash, until surveying in filtrate
NaOH content is 2.8g/L, and filtrate is transferred to filtrate receiver.
Step 10: blanking is to alkali soluble pulping tank 17, the mass ratio of the reclaimed water of alkali soluble pulping tank 17 and slurry is 7:1, stirring
30min。
Step 11: the slurry of alkali soluble pulping tank 17 is turned into 15m3To sour molten pot 10, added from crystal seed with hydrochloric acid measuring tank 9
1.3m3Watery hydrochloric acid to sour molten pot 10, regulation pH is 2.5, and it is 2.8 to survey pH again after stirring 10min, is warming up to 46 DEG C.
Step 12: the slurry to sour molten pot 10 is warming up to 65 DEG C, hydrochloric acid 1.2m is added again3, it is 1.0 to adjust pH；Open and steam
Steam valve door is continuously heating to 110 DEG C of boilings, and 1 DEG C/min of programming rate is aged 120 minutes.
Step 13: it is that 98.7%, total titanium concentration is 110g/L to survey conversion ratio R.
Step 14: the slurry that sour molten pot 10 is prepared goes to sour molten filter press 11, washing, until NaCl contains in filtrate
Measure as 0.2g/L.
Step 15: the sour blanking of molten filter press 11, the slurrying in sour molten pulping tank 12, total titanium concentration is 113g/L, you can
Obtain titanium dioxide crystal seeds of rutile.
Embodiment 4
A kind of use agricultural chemicals waste hydrochloric acid of the present embodiment prepares the production system of titanium dioxide crystal seed, basic be the same as Example 1, sheet
Embodiment use agricultural chemicals waste hydrochloric acid prepare the detailed process of titanium dioxide crystal seed for：
Step 1: abraum salt acid storage tank 1 supplies waste hydrochloric acid by transfering material pump to evaporator 2, the negative pressure of evaporator 2 is in 320-350KPa
Between fluctuate.
Step 2: evaporator 2 gives mixed gas of the gas-liquid separator 3 for HCl and vapor；The bottom of evaporator 2 has on a small quantity
Watery hydrochloric acid containing HCl is expelled to abraum salt acid storage tank 1.
Step 3: opening absorption tower 4 after the steam supply of gas-liquid separator 3, the liquid of gas-liquid separator 3 is separated out, and goes to waste hydrochloric acid
Storage tank 1, gas-liquid separator 3 is to absorption tower steam supply, and the concentrating hydrochloric acid after absorption tower 4 is absorbed goes to salt acid storage tank 5.
Step 4: hydrochloric acid volume reaches 50m in salt acid storage tank 53Turn 30m later3To hydrochloric acid make-up tank 6；Afterwards again from Nacl
7 turns of 60m of acid storage tank3Technical hydrochloric acid stirs 10min, surveys its concentration to hydrochloric acid make-up tank 6；Concentration goes to crystalline substance after reaching 31%
Plant standby with salt acid storage tank 8.
Step 5: by the 7.5m prepared3Metatitanic acid goes to metatitanic acid measuring tank 14 from metatitanic acid storage tank 13, is warming up to 60
℃。
Step 6: alkali soluble pot 15 plus 5.2m3Mass percent is 49% liquid caustic soda, is warming up to 75 DEG C.
Step 7: the metatitanic acid being had warmed up in metatitanic acid measuring tank 14 is transferred into alkali soluble 15 (jacketeds) of pot, temperature in 30min
Degree rises to 108 DEG C, is aged 2h.
Step 8: interior add of alkali soluble pot 15 reduces with the isometric desalted water of metatitanic acid, temperature, sand leaching water is added in chuck,
Slurry is cooled to 70 DEG C.
Step 9: the slurry after the completion of alkali soluble in alkali soluble pot 15 is transferred into alkali soluble filter press 16, wash, until surveying in filtrate
NaOH content is 3.8g/L, and filtrate is transferred to filtrate receiver.
Step 10: blanking is to alkali soluble pulping tank 17, the mass ratio of the reclaimed water of alkali soluble pulping tank 17 and slurry is 7:1, stirring
30min。
Step 11: the slurry of alkali soluble pulping tank 17 is turned into 15m3To sour molten pot 10, added from crystal seed with hydrochloric acid measuring tank 9
1.3m3Watery hydrochloric acid to sour molten pot 10, regulation pH is 2.5, and it is 2.8 to survey pH again after stirring 10min, is warming up to 46 DEG C.
Step 12: the slurry to sour molten pot 10 is warming up to 60 DEG C, hydrochloric acid is added to adjust pH to be 0.6 again；Open steam valve
100 DEG C of boilings are continuously heating to, 1 DEG C/min of programming rate is aged 120 minutes.
Step 13: it is that 99.1%, total titanium concentration is 114g/L to survey conversion ratio R.
Step 14: the slurry that sour molten pot 10 is prepared goes to sour molten filter press 11, washing, until NaCl contains in filtrate
Measure as 0.2g/L.
Step 15: the sour blanking of molten filter press 11, the slurrying in sour molten pulping tank 12, total titanium concentration is 115g/L, you can
Obtain titanium dioxide crystal seeds of rutile.
Schematical above that the present invention and embodiments thereof are described, the description does not have restricted, institute in accompanying drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited thereto.So, if the common skill of this area
Art personnel are enlightened by it, without departing from the spirit of the invention, are designed and the technical scheme without creative
Similar frame mode and embodiment, all should belong to protection scope of the present invention.
Claims (10)
1. a kind of method that utilization chlorination spent acid prepares titanium dioxide crystal seed, it is characterised in that：Operation is divided into the concentrating of waste hydrochloric acid, brilliant
The configuration of kind hydrochloric acid and three parts of the preparation of titanium dioxide crystal seed, are concentrated after agricultural chemicals waste hydrochloric acid is purified, absorbed
Hydrochloric acid solution, then by hydrochloric acid solution after technical hydrochloric acid and concentration according to 1 afterwards:1-2:1 ratio mixed configuration, configuration gained crystal seed
It is used for sour molten process prepared by titanium dioxide crystal seed with hydrochloric acid.
2. the method that a kind of utilization chlorination spent acid according to claim 1 prepares titanium dioxide crystal seed, it is characterised in that：Prepare
The production system of titanium dioxide crystal seed includes waste hydrochloric acid upgrading unit, crystal seed and prepares list with hydrochloric acid dispensing unit and titanium dioxide crystal seed
Member, described waste hydrochloric acid upgrading unit is connected with crystal seed with hydrochloric acid dispensing unit, and waste hydrochloric acid upgrading unit enters to agricultural chemicals waste hydrochloric acid
Crystal seed hydrochloric acid dispensing unit, the output channel and titanium dioxide crystal seed of crystal seed hydrochloric acid dispensing unit are inputted after row purification, absorption
The sour molten pot (10) of preparation unit is connected, and the hydrochloric acid that crystal seed is completed with hydrochloric acid configuration of described dispensing unit is inputted in sour molten pot (10).
3. the method that a kind of utilization chlorination spent acid according to claim 2 prepares titanium dioxide crystal seed, it is characterised in that：It is described
Waste hydrochloric acid upgrading unit include abraum salt acid storage tank (1), evaporator (2), gas-liquid separator (3), absorption tower (4) and salt acid storage tank
(5), abraum salt acid storage tank (1) is connected with evaporator (2), is connected at the top of evaporator (2) with gas-liquid separator (3), gas-liquid separator
(3) top is connected with absorption tower (4), and absorption tower (4) bottom is connected with salt acid storage tank (5).
4. the method that a kind of utilization chlorination spent acid according to claim 3 prepares titanium dioxide crystal seed, it is characterised in that：Evaporation
The horizontal level of device (2) is higher than abraum salt acid storage tank (1), and evaporator (2) bottom is connected with pipeline to abraum salt acid storage tank (1)；Gas-liquid
Separator (3) bottom is also connected with pipeline to abraum salt acid storage tank (1).
5. the method that a kind of utilization chlorination spent acid according to claim 3 or 4 prepares titanium dioxide crystal seed, it is characterised in that：
Described crystal seed includes hydrochloric acid make-up tank (6), technical hydrochloric acid storage tank (7) and crystal seed salt acid storage tank (8) with hydrochloric acid dispensing unit,
Salt acid storage tank (5) is connected with hydrochloric acid make-up tank (6), and technical hydrochloric acid storage tank (7) is also connected with hydrochloric acid make-up tank (6), and hydrochloric acid is prepared
Groove (6) lower end is connected with crystal seed with salt acid storage tank (8).
6. the method that a kind of utilization chlorination spent acid according to claim 5 prepares titanium dioxide crystal seed, it is characterised in that：It is described
Titanium dioxide crystal seed preparation unit include sour molten pot (10), sour molten filter press (11), sour molten pulping tank (12), metatitanic acid storage tank
(13), metatitanic acid measuring tank (14), alkali soluble pot (15), alkali soluble filter press (16), alkali soluble pulping tank (17)；According to the conveying of material
Direction, metatitanic acid storage tank (13), metatitanic acid measuring tank (14), alkali soluble pot (15), alkali soluble filter press (16), alkali soluble pulping tank
(17), sour molten pot (10), sour molten filter press (11), sour molten pulping tank (12) are sequentially connected, and crystal seed passes through crystalline substance with salt acid storage tank (8)
Plant and be connected with hydrochloric acid measuring tank (9) with sour molten pot (10).
7. the method that a kind of utilization chlorination spent acid according to claim 6 prepares titanium dioxide crystal seed, it is characterised in that：Agricultural chemicals
The concentration of waste hydrochloric acid and crystal seed are with the configuration detailed process of hydrochloric acid：
Step 1: opening evaporator (2), control evaporator (2) negative pressure is between 300-400KPa.
Step 2: opening abraum salt acid storage tank (1) transfering material pump, waste hydrochloric acid is supplied to evaporator (2).
Step 3: after for sour a period of time, evaporator (2) starts to gas-liquid separator (3) for HCl and the gaseous mixture of vapor
Body；
Step 4: evaporator (2), which is given after gas-liquid separator (3) steam supply, opens absorption tower (4), steam supply rear gas-liquid separation for a period of time
Device (3) liquid is separated out, and goes to abraum salt acid storage tank (1)；Gas-liquid separator (3) to absorption tower (4) steam supply for a period of time after, will inhale
The concentrating hydrochloric acid for receiving tower (4) absorption goes to salt acid storage tank (5).
Step 5: the interior concentrating hydrochloric acid volume of salt acid storage tank (5) reaches 50m3Turn 30m later3To hydrochloric acid make-up tank (6)；Again from Nacl
Acid storage tank (7) turns 30m3-60m3Technical hydrochloric acid surveys concentration of hydrochloric acid to hydrochloric acid make-up tank (6) after stirring a period of time；Concentration reaches
It is standby that 25%-31% goes to crystal seed salt acid storage tank (8).
8. the method that a kind of utilization chlorination spent acid according to claim 7 prepares titanium dioxide crystal seed, it is characterised in that：Titanium white
Detailed process prepared by powder crystal kind is：
Step 1: the metatitanic acid prepared is gone into metatitanic acid measuring tank (14) from metatitanic acid storage tank (13), 60-80 is warming up to
℃；
Step 2: adding the liquid caustic soda that certain volume mass percent concentration is 49% in alkali soluble pot (15), 75-95 DEG C is warming up to；
Step 3: the metatitanic acid having warmed up in metatitanic acid measuring tank (14) is transferred into alkali soluble pot (15), temperature rises to 108 DEG C, old
Change 2h；
Step 4: adding sand in alkali soluble pot (15) addition and the isometric desalted water of metatitanic acid, temperature reduction, alkali soluble pot (15) chuck
Drainage, 60-70 DEG C is cooled to by slurry；
Step 5: the slurry after the completion of alkali soluble pot (15) interior alkali soluble is transferred into alkali soluble filter press (16), deionized water is washed, until
NaOH content is less than 5g/L in filtrate, and filtrate is transferred to filtrate receiver；
Step 6: slurry is transferred to alkali soluble pulping tank (17) in alkali soluble filter press (16), alkali soluble pulping tank (17) reclaimed water and slurry
Mass ratio is 7:1, lasting stirring a period of time；
Step 7: the slurry of alkali soluble pulping tank (17) is gone into sour molten pot (10), from crystal seed hydrochloric acid measuring tank (9) plus watery hydrochloric acid
To sour molten pot (10), pH is adjusted<3.1, stir and add watery hydrochloric acid to ensure pH again after a period of time<3.1, it is warming up to 40-50 DEG C；
Step 8: the slurry of sour molten pot (10) is warming up into 60-65 DEG C, it is 0-1.0 that salt acid for adjusting pH is added again；It is continuously heating to
100-110 DEG C, it is aged 120 minutes；
Step 9: the slurry that sour molten pot (10) is prepared goes to sour molten filter press (11), deionized water washing, until in filtrate
NaCl contents are less than 1g/L；
Step 10: sour molten filter press (11) blanking, in the interior slurrying of sour molten pulping tank (12), it is 110-120g/ to control total titanium concentration
L, you can obtain titanium dioxide crystal seeds of rutile.
9. the method that a kind of utilization chlorination spent acid according to claim 8 prepares titanium dioxide crystal seed, it is characterised in that：Acid is molten
During with 1 DEG C/min increasing extent of temperature, sour solubility temperature is warming up to for 100-110 DEG C, in fluidized state.
10. the method that a kind of utilization chlorination spent acid according to claim 9 prepares titanium dioxide crystal seed, it is characterised in that：Acid
Require that it is that, more than 98.5%, total titanium concentration is 110-120g/L, then slurry is gone to survey rutile conversion ratio R after the completion of molten process
The molten filter press (11) of acid.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107298465A (en) * | 2017-07-20 | 2017-10-27 | 攀钢集团研究院有限公司 | The recovery and treatment method of rutile processing waste water |
| CN108516582A (en) * | 2018-04-28 | 2018-09-11 | 南京钛白化工有限责任公司 | A kind of preparation method of high durable nano rutile-type titanium dioxide |
| CN113120863A (en) * | 2021-04-22 | 2021-07-16 | 南通三圣石墨设备科技股份有限公司 | Hydrochloric acid method for recycling titanium dioxide hydrochloric acid |
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| CN202193614U (en) * | 2011-08-08 | 2012-04-18 | 常州化工设备有限公司 | Processing equipment for concentrating and recycling hydrochloric acid |
| US20150252448A1 (en) * | 2014-03-05 | 2015-09-10 | Fouad F. KAMALEDDINE | Production of high-grade synthetic rutile from low-grade titanium-bearing ores |
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| CN101311120A (en) * | 2008-05-05 | 2008-11-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of rutile type calcining seeds with high activity and high stability |
| CN202193614U (en) * | 2011-08-08 | 2012-04-18 | 常州化工设备有限公司 | Processing equipment for concentrating and recycling hydrochloric acid |
| US20150252448A1 (en) * | 2014-03-05 | 2015-09-10 | Fouad F. KAMALEDDINE | Production of high-grade synthetic rutile from low-grade titanium-bearing ores |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107298465A (en) * | 2017-07-20 | 2017-10-27 | 攀钢集团研究院有限公司 | The recovery and treatment method of rutile processing waste water |
| CN108516582A (en) * | 2018-04-28 | 2018-09-11 | 南京钛白化工有限责任公司 | A kind of preparation method of high durable nano rutile-type titanium dioxide |
| CN113120863A (en) * | 2021-04-22 | 2021-07-16 | 南通三圣石墨设备科技股份有限公司 | Hydrochloric acid method for recycling titanium dioxide hydrochloric acid |
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Denomination of invention: A method for preparing titanium dioxide crystal seed by using chlorinated waste acid Effective date of registration: 20210924 Granted publication date: 20200505 Pledgee: China Co. truction Bank Corp Ma'anshan branch Pledgor: ANHUI VENUS TITANIUM DIOXIDE (Group) Co.,Ltd. Registration number: Y2021980009723 |
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