CN102532952B - Preparation method of titanium dioxide pigment special for laminated paper - Google Patents
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Abstract
The invention discloses a preparation method of a titanium dioxide pigment special for laminated paper. The method specifically comprises the following steps of: preparing titanium dioxide rutile primary product into slurry, dispersing by using phosphorus compound-containing solution and grinding; heating the ground slurry and preserving heat; adding water-soluble cerium salt solution to adjust the pH value of the slurry and slaking to form a first cover layer; adding phosphorus compound-containing solution and zirconium salt solution to adjust the pH value of the slurry and slaking to form a second cover layer; adding aluminum salt solution to adjust the pH value of the slurry and slaking to form a third cover layer; filtering and washing filter cakes with de-ionized water, drying, aero-pulverizing and performing gas-solid separation to obtain a finished product. The method has a high-efficiency and rational production process; the prepared titanium dioxide pigment has high light resistance, high coverage capacity, superior retention and low isopotential point and has excellent dispersion performance in a weakly alkaline application system.
Description
Technical field
The present invention relates to a kind of preparation method of titanium dioxide pigment special for laminated paper.
Background technology
Titanium dioxide becomes best white pigment because of its good optical property, be widely used in paper industry, and the decorative paper industry is titanium dioxide main application industry in field of papermaking, decorative paper is again laminated paper, be mainly used in the wood-based plate veneer, decorative paper is very high to pigment photostabilization index request, yet but there is certain defect in titanium dioxide as white pigment, be on titanium dioxide surface, to have many photoactivation points, under the effect of UV-light, oxonium ion on its lattice can lose two electronics and become Sauerstoffatom, the electronics of releasing is caught by the titanic ion, it is reduced into to trivalent titanium ion, activity hydroxy and hydroperoxyl radical radical that reaction is emitted, activity with height, can make titanium dioxide organic polymer oxidation on every side, degraded, loss of gloss appears, the breakoff phenomenons such as variable color.
In order to overcome the photochemidal activity of titanium dioxide, done a large amount of experimental studies both at home and abroad.Wherein in the method for chlorination process production titanium dioxide, adopt and in oxidising process, add aluminum chloride, silicon tetrachloride, phosphorus pentachloride, in the method for Titanium White Production By Sulfuric Acid Process, add aluminum compound and phosphoric acid salt in the salt treating processes; And in aftertreatment technology, introduce all kinds of inorganic hydrous oxides, as silicon oxide, aluminum oxide, zirconium white, cerium oxide, five phosphorus oxide etc., suppress the photochemidal activity of titanium dioxide, to improve its light fastness in application process.
US5851652 has proposed a kind of innermost layer and has coated Cerium monophosphate, second layer coated silica, and last one deck coats the method for preparing titanium dioxide of aluminum phosphate or aluminum oxide, and the innermost layer of coating or outermost layer or these two layers all can contain the fluorine root.Although titanium dioxide prepared by the method has than high light-fast, because the isopotential point to product (IEP) designs, cause the preparing product isopotential point higher, in neutrality or meta-alkalescence water slurry, be prone to retention, the poor problem of dispersing property.
US578574 has proposed a kind of sunproof method of raising titanium dioxide, the method is when carrying out inorganic processing to titanium dioxide, first add a kind of aluminum phosphate solution prepared in advance, then add oxygenant Potassium Iodate, saltpetre or vitriolate of tartar, to improve the light fastness of product; CN1132769A has proposed a kind for the treatment of process that is suitable for the titanium dioxide of paper industry application, the method first coats one deck phosphoric acid alumina, then coats one deck aluminum oxide, finally coats one deck magnesium oxide, the method has high materialization retention, and has good light fastness; CN101857736A has proposed the production method of another kind of high-light-fastness rutile type titanium dioxide, and the phosphoric acid salt that the method adds, zirconates and aluminium salt are coated on the titanium dioxide surface with the form of zirconium phosphate, aluminum phosphate and hydration aluminium sesquioxide respectively.The method that US578574, CN1132769A and CN101857736A propose has only solved the general requirement of paper industry to the titanium dioxide light fastness, can not meet the laminated paper field that special high-light-fastness energy is arranged.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method of titanium dioxide pigment special for laminated paper, the method make TiO 2 pigment have excellent light stability, opacifying power and retention, and isopotential point is low, dispersing property is good.
Technical solution of the present invention is:
A kind of preparation method of titanium dioxide pigment special for laminated paper comprises the following steps:
1) the rutile titanium dioxide first product that adopts chlorination process or sulfuric acid process to prepare, be mixed with slurry by this first product, with the Solution Dispersion of P contained compound, processes, and grind;
2) slurry after grinding is warming up to 40 ℃～80 ℃, and keeps this temperature;
3) in 0.5h～1h, add water-soluble cerium solution, wherein the add-on of water-soluble cerium solution is with CeO
2Account for the TiO in first product
2Weight counts 0.05%～1.0%, maintains slurry PH=8.5～9.5 with alkaline aqueous solution, slaking 10min～60min;
4) in 10min ~ 30min, add the solution of P contained compound, wherein the add-on of P contained compound is with P
2O
5Account for the TiO in first product
2Weight counts 1.0%～2.0%, slaking 10min～30min; In 0.5h～1h, add zirconium salt solution, wherein the zirconium salt solution add-on is with ZrO
2Account for the TiO in first product
2Weight counts 0.1%～1.0%, maintains whole slurry PH=7.0～10.0, slaking 10min～30min with alkaline aqueous solution;
5) in 1h～2h, add aluminum salt solution, wherein the add-on of aluminum salt solution is with Al
2O
3Account for the TiO in first product
2Weight counts 1.0%～3.0%, adds mineral acid or acid-salt or alkali or alkaline salt solution to maintain slurry PH=7.0～9.0, slaking 20min～40min;
6) in 0.5h～1h, add aluminum salt solution, wherein the add-on of aluminum salt solution is with Al
2O
3Account for the TiO in first product
2Weight counts 1.0%～3.0%, adds mineral acid or acid-salt or alkali or alkaline salt solution to maintain slurry PH=5.5～6.5, slaking 1h～3h;
7) by 50 ℃ ~ 80 ℃ deionized water filtration washing to filter cake resistivity, be greater than 15000 Ω cm, then carry out drying, the processing of gas powder, gas solid separation, make TiO 2 pigment.
The preparation method of above-mentioned titanium dioxide pigment special for laminated paper, in described rutile titanium dioxide first product, rutile content is more than 99%.
The preparation method of above-mentioned titanium dioxide pigment special for laminated paper, P contained compound described in step 1) and step 4) is Sodium hexametaphosphate 99, trisodium phosphate, tripoly phosphate sodium STPP, SODIUM PHOSPHATE, MONOBASIC, Sodium phosphate dibasic, tertiary sodium phosphate or phosphoric acid, and P contained compound concentration is with P
2O
5Count 50g/L～200g/L.
The preparation method of above-mentioned titanium dioxide pigment special for laminated paper, described P contained compound is Sodium hexametaphosphate 99.
The preparation method of above-mentioned titanium dioxide pigment special for laminated paper, described cerium solution is cerous sulfate or cerous nitrate, cerium solution concentration is with CeO
2Count 30g/L～100g/L.
The preparation method of above-mentioned titanium dioxide pigment special for laminated paper, described zirconium salt solution is zirconium sulfate, zirconium nitrate, zirconium tetrachloride or zirconium oxychloride, the concentration of zirconium salt solution is with ZrO
2Count 50g/L～200g/L.
The preparation method of above-mentioned one-tenth titanium dioxide pigment special for laminated paper, described zirconium salt solution is zirconium sulfate.
The preparation method of above-mentioned titanium dioxide pigment special for laminated paper, described aluminum salt solution is Tai-Ace S 150, aluminum chloride, sodium metaaluminate or potassium metaaluminate, aluminum salt solution concentration is with Al
2O
3Count 80g/L～200g/L.
The preparation method of above-mentioned titanium dioxide pigment special for laminated paper, described mineral acid is hydrochloric acid, sulfuric acid or nitric acid; Described mineral alkali is sodium hydroxide or potassium hydroxide.
The preparation method of above-mentioned titanium dioxide pigment special for laminated paper, described acid-salt is Tai-Ace S 150 or aluminum chloride, described basic salt is sodium metaaluminate or potassium metaaluminate.
In the titanium dioxide first product that the present invention adopts, rutile content, more than 99%, guarantees the opacifying power of product and basic light fastness; By the slurry to the titanium dioxide first product, adjust pH value and carry out the dispersion grinding processing, effectively controlling pulp particle before coating and exist with the form of initial size, guaranteeing the hydrous ceria coated continuously and evenly; By adding water-soluble cerium solution and maintaining the slurry pH value, be alkalescence, on titanium dioxide surface, form hydrous ceria first coating layer of continuous uniform, coating this coating film is to utilize Ce
4+/ Ce
3+Oxidation reduction electro-dynamic potential higher than Ti
4+/ Ti
3+Oxidation reduction electro-dynamic potential, Ce is being arranged
4+While existing, Ti
4+Just can not be reduced to Ti
3+Therefore, improve the light fastness of TiO 2 pigment; Then first add excessive phosphoric acid salt, add again zirconates and maintain the slurry pH value and be alkalescence, in hydrous ceria the first cover surface, form zirconium phosphate class the second coating layer, Zirconium phosphate compound has splendid light fastness in field of papermaking, and independent coating hydrous phosphorus oxide and hydrous zirconium oxide film are limited to improving light fastness; Under the condition that has phosphoric acid salt to exist, by in slurry, adding aluminum salt solution and maintaining the slurry pH value, be alkalescence, can guarantee to form phosphoric acid alumina the 3rd coating layer on the second coating layer, this kind coating layer is more favourable to the raising of light fastness than forming with this understanding aluminum oxide; Under solutions of weak acidity, on the 3rd coating layer, coat hydrated aluminum oxide the 4th coating layer of one deck densification, the aluminum oxide of the type is netted or zonal structure, is conducive to improve the TiO 2 pigment optical property and in the water-dispersion performance.The production process of the method is efficient, reasonable, and the TiO 2 pigment made has high-light-fastness, high covering power and good retention, and isopotential point is low, guarantees in the weakly alkaline application system, to have excellent dispersing property.
Embodiment
Embodiment 1
1, taking chlorination process titanium dioxide first product powder 500g, add deionized water to be mixed with the slurry of 500g/L, is that 20% sodium hydroxide solution is regulated slurry pH value to 9.0 by concentration, adds with P
2O
5Account for TiO in first product
2Weight is counted 0.1% sodium hexametaphosphate solution, and the concentration of sodium hexametaphosphate solution is with P
2O
5Count 50g/L, jitter time is 20min; Slurry after disperseing is carried out to sanded in sand mill, it is 400nm that the parting sand grinding media obtains the slurry median size, and in quantitative terms, the ratio that surpasses 800nm is 1.0% to size-grade distribution.
2, the slurry after sand milling is warming up to 40 ℃, and makes whole coating process maintain this temperature.
3, in 0.5h, add with CeO
2Account for TiO in first product
2Weight is counted 0.05% cerous nitrate solution, and the concentration of cerous nitrate solution is with CeO
2Count 30g/L, with 20% sodium hydroxide solution, maintain slurry PH between 8.5 ~ 8.7 simultaneously, slaking 10min, form hydrous ceria the first coating layer at titanium dioxide surface.
4, at 10min, add with P rapidly
2O
5Account for TiO in first product
2Weight is counted 1.0% sodium hexametaphosphate solution, and the concentration of sodium hexametaphosphate solution is with P
2O
5Count 50g/L, slaking 10min; At 0.5h, add with ZrO
2Account for TiO in first product
2Weight is counted 0.1% zirconium sulfate solution, and the concentration of zirconium sulfate solution is with ZrO
2Count 50g/L, maintain slurry PH between 7.0 ~ 7.2, slaking 10min, form zirconium phosphate class the second coating layer in hydrous ceria the first cover surface.
5, in 1h, add with Al
2O
3Account for TiO in first product
2Weight is counted 1.0% sodium aluminate solution, and sodium aluminate solution concentration is with Al
2O
3Count 80g/L, add 20% sulfuric acid to maintain the slurry pH value between 7.0 ~ 7.2, slaking 20min, form phosphoric acid alumina the 3rd coating layer on the second coating layer.
6, in 0.5h, add with Al
2O
3Account for TiO in first product
2Weight is counted 3.0% sodium aluminate solution, and sodium aluminate solution concentration is with Al
2O
3Count 80g/L, add 20% sulfuric acid to maintain the slurry pH value between 5.5 ~ 5.7, slaking 1h, form hydrated aluminum oxide the 4th coating layer on the 3rd coating layer.
7, with 50 ℃ of deionized waters, be washed till filter cake resistivity 15800 Ω cm, then carry out drying, the processing of gas powder, reclaim through gas solid separation, obtain titanium dioxide pigment special for laminated paper.
Embodiment 2
1, taking chlorination process titanium dioxide first product powder 600g, add deionized water to be mixed with the slurry of 600g/l, is that 20% potassium hydroxide solution is regulated slurry pH value to 9.5 by concentration, adds 0.3% sodium tripolyphosphate solution, and the concentration of sodium tripolyphosphate solution solution is with P
2O
5Count 100g/L, jitter time is 30min; Slurry after disperseing is carried out to sanded in sand mill, it is 382nm that the parting sand grinding media obtains the slurry median size, and in quantitative terms, the ratio that surpasses 800nm is 0.85% to size-grade distribution.
2, the slurry after sand milling is warming up to 50 ℃, and makes whole coating process maintain this temperature.
3, in 0.5h, add with CeO
2Account for TiO in first product
2Weight is counted 0.2% cerous sulfate solution, and the concentration of cerous sulfate solution is with CeO
2Count 50g/L, with 20% potassium hydroxide solution, maintain slurry PH between 8.8 ~ 9.0 simultaneously, slaking 20min, form hydrous ceria the first coating layer at titanium dioxide surface.
4, at 20min, add with P rapidly
2O
5Account for TiO in first product
2Weight is counted 1.5% sodium tripolyphosphate solution, and the concentration of sodium tripolyphosphate solution is with P
2O
5Count 100g/L, slaking 20min; At 1h, add with ZrO
2Account for TiO in first product
2Weight is counted 0.3% zirconium nitrate solution, and the concentration of zirconium nitrate solution is with ZrO
2Count 100g/L, maintain slurry PH between 8.0 ~ 8.2, slaking 20min, form zirconium phosphate class the second coating layer in hydrous ceria the first cover surface.
5, in 1.5h, add with Al
2O
3Account for TiO in first product
2Weight is counted 2.0% alum liquor, and alum liquor concentration is with Al
2O
3Count 120g/L, add with Al
2O
3The sodium aluminate solution of counting 200g/l maintains the slurry pH value between 8.0 ~ 8.2, and slaking 30min forms phosphoric acid alumina the 3rd coating layer on the second coating layer.
6, in 1.0h, add with Al
2O
3Account for TiO in first product
2Weight is counted 1.5% alum liquor, and alum liquor concentration is with Al
2O
3Count 120g/L, in addition Al
2O
3The sodium aluminate solution of counting 200g/l maintains the slurry pH value between 5.8 ~ 6.0, and slaking 2h forms hydrated aluminum oxide the 4th coating layer on the 3rd coating layer.
7, with 60 ℃ of deionized waters, be washed till filter cake resistivity 17800 Ω cm, then carry out drying, the processing of gas powder, reclaim through bag filter, obtain titanium dioxide pigment special for laminated paper.
Embodiment 3
1, taking sulfate process titanium dioxide first product powder 700g, add deionized water to be mixed with the slurry of 700g/l, is that 20% sodium hydroxide solution is regulated slurry pH value to 10 by concentration, adds 0.5% phosphoric acid solution, and the concentration of phosphoric acid solution is with P
2O
5Count 150g/L, jitter time is 30min; Slurry after disperseing is carried out to sanded in sand mill, it is 335nm that the parting sand grinding media obtains the slurry median size, and in quantitative terms, the ratio that surpasses 800nm is 0.62% to size-grade distribution.
2, the slurry after sand milling is warming up to 60 ℃, and makes whole coating process maintain this temperature.
3, in 1.0h, add with CeO
2Account for TiO in first product
2Weight is counted 0.5% cerous sulfate solution, and the concentration of cerous sulfate solution is with CeO
2Count 70g/L, with 20% sodium hydroxide solution, maintain slurry PH between 9.0 ~ 9.2 simultaneously, slaking 30min, form hydrous ceria the first coating layer at titanium dioxide surface.
4, at 30min, add with P rapidly
2O
5Account for TiO in first product
2Weight is counted 2.0% phosphoric acid solution, and the concentration of phosphoric acid solution is with P
2O
5Count 150g/L, slaking 20min; 1h adds with ZrO
2Account for TiO in first product
2Weight is counted 0.5% zirconium tetrachloride solution, and the concentration of zirconium tetrachloride solution is with ZrO
2Count 150g/L, maintain slurry PH between 8.5 ~ 8.7, slaking 30min, form zirconium phosphate class the second coating layer in hydrous ceria the first cover surface.
5, in 2.0h, add with Al
2O
3Account for TiO in first product
2Weight is counted 1.5% aluminum trichloride solution, and aluminum trichloride solution concentration is with Al
2O
3Count 160g/L, add 10%NaOH solution to maintain the slurry pH value between 8.4 ~ 8.6, slaking 30min, form phosphoric acid alumina the 3rd coating layer on the second coating layer.
6, in 0.5h, add with Al
2O
3Account for TiO in first product
2Weight is counted 1.5% aluminum trichloride solution, and aluminum trichloride solution concentration is with Al
2O
3Count 160g/L, add 10%NaOH solution to maintain the slurry pH value between 6.0 ~ 6.2, slaking 3h, form hydrated aluminum oxide the 4th coating layer on the 3rd coating layer.
7, with 70 ℃ of deionized waters, be washed till filter cake resistivity 21500 Ω cm, then carry out drying, the processing of gas powder, reclaim through bag filter, obtain titanium dioxide pigment special for laminated paper.
Embodiment 4
1, taking chlorination process titanium dioxide first product powder 800g, add deionized water to be mixed with the slurry of 800g/l, is that 20% sodium hydroxide solution is regulated slurry pH value to 11.0 by concentration, adds 1.0% sodium hexametaphosphate solution, and the concentration of sodium hexametaphosphate solution is with P
2O
5Count 200g/L, jitter time is 30min; Slurry after disperseing is carried out to sanded in sand mill, it is 314nm that the parting sand grinding media obtains the slurry median size, and in quantitative terms, the ratio that surpasses 800nm is 0.18% to size-grade distribution.
2, the slurry after sand milling is warming up to 80 ℃, and makes whole coating process maintain this temperature.
3, in 1.0h, add with CeO
2Account for TiO in first product
2Weight is counted 1.0% cerous nitrate solution, and the concentration of cerous nitrate solution is with CeO
2Count 100g/L, with 20% sodium hydroxide solution, maintain slurry PH between 9.3 ~ 9.5 simultaneously, slaking 30min, form hydrous ceria the first coating layer at titanium dioxide surface.
4, at 30min, add with P rapidly
2O
5Account for TiO in first product
2Weight is counted 2.0% sodium hexametaphosphate solution, and the concentration of sodium hexametaphosphate solution is with P
2O
5Count 200g/L, slaking 30min; 1h adds with ZrO
2Account for TiO in first product
2Weight is counted 1.0% zirconium hydroxide solution, and the concentration of zirconium hydroxide solution is with ZrO
2Count 200g/L, maintain slurry PH between 9.8 ~ 10.0, slaking 30min, form zirconium phosphate class the second coating layer in hydrous ceria the first cover surface.
5, in 2.0h, add with Al
2O
3Account for TiO2 weight in first product and count 3.0% sodium aluminate solution, sodium aluminate solution concentration is with Al
2O
3Count 200g/L, add with Al
2O
3The alum liquor of counting 100g/L maintains the slurry pH value between 8.8 ~ 9.0, and slaking 40min forms phosphoric acid alumina the 3rd coating layer on the second coating layer.
6, in 0.5h, add with Al
2O
3Account for TiO in first product
2Weight is counted 1.0% sodium aluminate solution, and sodium aluminate solution concentration is with Al
2O
3Count 200g/L, add with Al
2O
3The alum liquor of counting 100g/L maintains the slurry pH value between 6.3 ~ 6.5, and slaking 3h forms hydrated aluminum oxide the 4th coating layer on the 3rd coating layer.
7, with 80 ℃ of deionized waters, be washed till filter cake resistivity 16400 Ω cm, then carry out drying, the processing of gas powder, reclaim through bag filter, obtain titanium dioxide pigment special for laminated paper.
Embodiment 5
In above-described embodiment 1～embodiment 4, cerium solution cerous sulfate and cerous nitrate can the phase trans-substitutions; P contained compound Sodium hexametaphosphate 99, trisodium phosphate, tripoly phosphate sodium STPP, SODIUM PHOSPHATE, MONOBASIC, Sodium phosphate dibasic, tertiary sodium phosphate and phosphoric acid can replace mutually; Zirconium salt solution zirconium sulfate, zirconium nitrate, zirconium tetrachloride and zirconium oxychloride can the phase trans-substitutions; Aluminum salt solution Tai-Ace S 150, aluminum chloride, sodium metaaluminate and potassium metaaluminate can the phase trans-substitutions; Mineral acid hydrochloric acid, sulfuric acid, nitric acid and acid-salt Tai-Ace S 150 while carrying out when the 3rd layer and the 4th layer coat maintaining pH value, aluminum chloride can the phase trans-substitutions, and the mineral alkali sodium hydroxide of use, potassium hydroxide and basic salt sodium metaaluminate, potassium metaaluminate can the phase trans-substitutions.
Reference examples 1
Repeat the inorganic treatment step of embodiment 1, cancel the first layer hydrous ceria coating layer and coat operation.
Reference examples 2
Repeat the inorganic treatment step of embodiment 1, cancel second layer hypophosphite monohydrate zirconium coating layer and coat operation.
Reference examples 3
Repeat the inorganic treatment step of embodiment 1, cancel the 3rd layer of hypophosphite monohydrate aluminium coating layer and coat operation.
Reference examples 4
Repeat the inorganic treatment step of embodiment 1, cancel the phosphatic operation that adds.
Reference examples 5
Repeat the inorganic treatment step of embodiment 1, cancel the first layer hydrous ceria coating layer coating operation and cancel second layer hypophosphite monohydrate zirconium coating layer coating operation.
TiO 2 pigment by above-mentioned example 1～example 4 and 5 preparations of reference examples 1～reference examples, adopt identical formula to join prepared layer pressboard in paper according to the laminated paper production technique and detect, experimental result such as following table 1:
Table 1. TiO 2 pigment is made pertinax comparison and detection result
| Numbering | L* | A* | b* | The IEP(isopotential point) | Titanium dioxide retention % | Contrast ratio opacifying power % | Photostabilization Δ E |
| Example 1 | 95.17 | 0.26 | -1.18 | 7.25 | 99.48 | 98.52 | 0.97 |
| Example 2 | 94.98 | 0.27 | -1.10 | 7.12 | 99.52 | 98.35 | 0.62 |
| Example 3 | 94.25 | 0.30 | -0.71 | 6.93 | 99.46 | 98.17 | 0.51 |
| Example 4 | 94.85 | 0.27 | -1.02 | 6.54 | 99.39 | 98.05 | 0.32 |
| Reference examples 1 | 95.16 | 0.26 | -1.22 | 7.58 | 99.41 | 98.46 | 2.15 |
| Reference examples 2 | 94.97 | 0.26 | -1.17 | 7.47 | 99.49 | 98.54 | 1.66 |
| Reference examples 3 | 95.01 | 0.26 | -1.19 | 6.92 | 99.25 | 98.58 | 1.89 |
| Reference examples 4 | 95.12 | 0.27 | -1.15 | 7.62 | 99.37 | 98.40 | 1.93 |
| Reference examples 5 | 95.13 | 0.26 | -1.22 | 7.56 | 99.41 | 98.51 | 2.53 |
| CR-501 | 95.20 | 0.26 | -1.20 | 7.0 | 99.34 | 98.47 | 2.64 |
Remarks: the titanium dioxide model that in table, " CR-501 " produces and sell on market for Jinzhou Titanium Industry Co., Ltd.; Photostabilization
Δ EDetection is the result at ultraviolet (UVA) light irradiation 10h;
By the data in table 1, can be found out, the TiO 2 pigment of producing according to the present invention has excellent light stability, opacifying power, easily disperse and good retention.
Claims (8)
1. the preparation method of a titanium dioxide pigment special for laminated paper is characterized in that:
1) the rutile titanium dioxide first product that adopts chlorination process or sulfuric acid process to prepare, be mixed with slurry by this first product, with the Solution Dispersion of P contained compound, processes, and grind;
2) slurry after grinding is warming up to 40 ℃～80 ℃, and keeps this temperature;
3) in 0.5h～1h, add water-soluble cerium solution, wherein the add-on of water-soluble cerium solution is with CeO
2Account for the TiO in first product
2Weight counts 0.05%～1.0%, maintains slurry pH=8.5～9.5 with alkaline aqueous solution, slaking 10min～60min;
4) in 10min ~ 30min, add the solution of P contained compound, wherein the add-on of P contained compound is with P
2O
5Account for the TiO in first product
2Weight counts 1.0%～2.0%, slaking 10min～30min; In 0.5h～1h, add zirconium salt solution, wherein the zirconium salt solution add-on is with ZrO
2Account for the TiO in first product
2Weight counts 0.1%～1.0%, maintains whole slurry pH to 7.0～10.0, slaking 10min～30min with alkaline aqueous solution; P contained compound described in step 1) and step 4) is Sodium hexametaphosphate 99, trisodium phosphate, tripoly phosphate sodium STPP, SODIUM PHOSPHATE, MONOBASIC, Sodium phosphate dibasic, tertiary sodium phosphate or phosphoric acid, and P contained compound concentration is with P
2O
5Count 50g/L～200g/L.
5) in 1h～2h, add alum liquor, aluminum trichloride solution, sodium aluminate solution or potassium metaaluminate solution, alum liquor, aluminum trichloride solution, sodium aluminate solution or potassium metaaluminate strength of solution are with Al
2O
3Count 80g/L～200g/L, wherein the add-on of alum liquor, aluminum trichloride solution, sodium aluminate solution or potassium metaaluminate solution is with Al
2O
3Account for the TiO in first product
2Weight counts 1.0%～3.0%, adds mineral acid or acid-salt or alkali or alkaline salt solution to maintain slurry pH=7.0～9.0, slaking 20min～40min;
6) in 0.5h～1h, add alum liquor, aluminum trichloride solution, sodium aluminate solution or potassium metaaluminate solution, alum liquor, aluminum trichloride solution, sodium aluminate solution or potassium metaaluminate strength of solution are with Al
2O
3Count 80g/L～200g/L, wherein the add-on of alum liquor, aluminum trichloride solution, sodium aluminate solution or potassium metaaluminate solution is with Al
2O
3Account for the TiO in first product
2Weight counts 1.0%～3.0%, adds mineral acid or acid-salt or alkali or alkaline salt solution to maintain slurry pH=5.5～6.5, slaking 1h～3h;
7) by 50 ℃ ~ 80 ℃ deionized water filtration washing to filter cake resistivity, be greater than 15000 Ω cm, then carry out drying, the processing of gas powder, gas solid separation, make titanium dioxide pigment special for laminated paper.
2. the preparation method of titanium dioxide pigment special for laminated paper according to claim 1, it is characterized in that: in described rutile titanium dioxide first product, rutile content should be more than 99%.
3. the preparation method of titanium dioxide pigment special for laminated paper according to claim 1, it is characterized in that: described P contained compound is Sodium hexametaphosphate 99.
4. the preparation method of titanium dioxide pigment special for laminated paper according to claim 1, it is characterized in that: described cerium solution is cerous sulfate solution or cerous nitrate solution, and cerium solution concentration is with CeO
2Count 30g/L～100g/L.
5. the preparation method of titanium dioxide pigment special for laminated paper according to claim 1, it is characterized in that: described zirconium salt solution is zirconium sulfate solution, zirconium nitrate solution, zirconium tetrachloride solution or zirconyl chloride solution, and the concentration of zirconium salt solution is with ZrO
2Count 50g/L～200g/L.
6. the preparation method of titanium dioxide pigment special for laminated paper according to claim 5, it is characterized in that: described zirconium salt solution is zirconium sulfate solution.
7. the preparation method of titanium dioxide pigment special for laminated paper according to claim 1, it is characterized in that: described mineral acid is hydrochloric acid, sulfuric acid or nitric acid; Described mineral alkali is sodium hydroxide or potassium hydroxide.
8. the preparation method of titanium dioxide pigment special for laminated paper according to claim 1, it is characterized in that: described acid-salt is Tai-Ace S 150 or aluminum chloride, described basic salt is sodium metaaluminate or potassium metaaluminate.
Priority Applications (1)
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