JPS6045125B2 - Manufacturing method of alumina sol - Google Patents
Manufacturing method of alumina solInfo
- Publication number
- JPS6045125B2 JPS6045125B2 JP53024237A JP2423778A JPS6045125B2 JP S6045125 B2 JPS6045125 B2 JP S6045125B2 JP 53024237 A JP53024237 A JP 53024237A JP 2423778 A JP2423778 A JP 2423778A JP S6045125 B2 JPS6045125 B2 JP S6045125B2
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- alumina sol
- sol
- producing
- weight
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/78—Compounds containing aluminium and two or more other elements, with the exception of oxygen and hydrogen
- C01F7/786—Compounds containing aluminium and two or more other elements, with the exception of oxygen and hydrogen containing, besides aluminium, only anions, e.g. Al[OH]xCly[SO4]z
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
【発明の詳細な説明】 本発明はアルミナゾルの製造法に関する。[Detailed description of the invention] The present invention relates to a method for producing alumina sol.
さらに詳細には低粘性、経時安定性の優れたアルミナゾ
ルの製造法に関する。More specifically, the present invention relates to a method for producing an alumina sol that has low viscosity and excellent stability over time.
現在、種々のアルミナゾル、該ゾルを乾燥し粉末状とな
し、これを再分散させて使用することを目的とした分散
性アルミナ粉末が布販されているが、いずれの製品も約
10重量%以上のA1。Currently, various alumina sols and dispersible alumina powders that are intended to be used by drying the sol into a powder and redispersing it are on the market, but all of these products contain approximately 10% by weight or more. A1 of.
03濃度のゾルになると経時安定性が著しく低下し、数
日以内にゲル化する。When the sol reaches a concentration of 03, its stability over time decreases significantly and it gels within a few days.
また、低A1。O。濃度のゾルの場合には、大量の媒体
を運搬しなければならないとか、あるいは使用に際して
、大量の媒体を蒸発させなければならないという不利益
が存在する。アルミナゾルは通常、アルミナゲルの分散
液を無機酸あるいは有機酸により解膠処理することによ
つて製造されている。従来、アルミナゾルの製造方法と
して、1アル・ミナゲルの分散液を酸根/Al(モル比
)0.5〜2.4の酸の存在下に水熱処理し、ベーマイ
ト結晶格子を有しファイバーの形態をとるアルミナゾル
を製造する方法(特公昭40−1429諾公報)、2ア
ルミン酸ソーダ水溶液と水溶性アルミニウム塩溶液とを
PHが9〜10になるようにして短時間に反応させてア
ルミナゲルを生成、熟成させ、ついでアルミナゲルの分
散液に一価の無機酸あるいは有機酸を酸根/Al(モル
比)が0.15以上になるように添加し、均一なゾルを
生成させる方法(特公昭40−84的号公報)、8アル
ミン酸ソーダ溶液中に炭酸ガスを吹込むことによつて製
造した擬ベーマイトを酸根/Al(モル比)0.05〜
0.2の一価の強酸中に分散させる方法(英国特許第1
440194号明細書)等が提案されている。Also, low A1. O. Concentrated sols have the disadvantage that large amounts of medium must be transported or that large amounts of medium must be evaporated during use. Alumina sol is usually produced by peptizing an alumina gel dispersion with an inorganic or organic acid. Conventionally, as a method for producing alumina sol, a dispersion of 1-alumina gel was hydrothermally treated in the presence of an acid with an acid radical/Al (molar ratio) of 0.5 to 2.4 to form a fiber having a boehmite crystal lattice. A method for producing alumina sol (Japanese Patent Publication No. 40-1429), in which an aqueous solution of sodium dialuminate and a water-soluble aluminum salt solution are reacted in a short period of time at a pH of 9 to 10 to produce alumina gel. After aging, a monovalent inorganic acid or an organic acid is added to the alumina gel dispersion so that the acid radical/Al (molar ratio) is 0.15 or more, thereby producing a uniform sol (Japanese Patent Publication No. 1973- No. 84 Publication), 8 Pseudo-boehmite produced by blowing carbon dioxide into a sodium aluminate solution was mixed with acid radical/Al (molar ratio) from 0.05 to
A method of dispersion in a strong monovalent acid of 0.2 (British Patent No. 1)
440194) etc. have been proposed.
しかしながら、1の方法によつて得られるアルミナゾル
は、アルミナが繊維状であるためと思われるが、ゾル化
時のスラリー中のAl。However, the alumina sol obtained by method 1 contains Al in the slurry during sol formation, probably because the alumina is fibrous.
O3濃度が約1呼量%以上では、水熱処理時にゲルが生
じ、ゾル化させることができず、また該方法によつて得
られた分散性アルミナ粉末を水に分散させ液状ゾルを調
整する場合、その濃度が約1呼量%以下という低Al2
O3濃度のゾルの調整の場合でも分散性が劣りゾルが効
率的に得られないという欠点がある。また、ゾル化に用
いる酸の使用量も酸根/.A1(モル比)0.5〜2.
4の範囲を教えているにすぎない。2の方法によつて得
られるアルミナゾル用粉末も、再分散性が劣りAl2O
3濃度が約1呼量%までのアルミナゾルしか調整できず
、しかもその濃度における経時安定性も著しく劣るとい
う不都合を有している。If the O3 concentration is about 1% by volume or more, a gel will form during the hydrothermal treatment and it will not be possible to form a sol, and when the dispersible alumina powder obtained by this method is dispersed in water to prepare a liquid sol. , with a low Al2 concentration of approximately 1% by volume or less
Even in the case of adjusting the O3 concentration of the sol, there is a drawback that the dispersibility is poor and the sol cannot be obtained efficiently. In addition, the amount of acid used for solization is also the same as acid radical/. A1 (molar ratio) 0.5-2.
It only teaches the range of 4. The powder for alumina sol obtained by method 2 also has poor redispersibility and Al2O
This method has the disadvantage that an alumina sol having a concentration of up to about 1% by volume can only be prepared, and the stability over time at that concentration is also extremely poor.
また、該特公昭40−84的号には、該方法で製造した
アルミナゲルの場合には酸根/A1(モル比)が0.1
5未満であると得られる粉末はゾル形態に転化しないと
記載されている。3の方法によつて製造されるアルミナ
ゾルもAl2O3濃度が約10重量%以上のアルミナゾ
ルはせいぜい数日間しか安定でない。In addition, in the Japanese Patent Publication No. 1984-1984, it is stated that in the case of alumina gel produced by this method, the acid radical/A1 (molar ratio) is 0.1.
It is stated that if it is less than 5, the resulting powder will not convert into sol form. The alumina sol produced by method 3 and having an Al2O3 concentration of about 10% by weight or more is stable for only a few days at most.
また、該英国特許明細書には、該特許方法で製造したア
ルミナゲルは有機酸ではゾル化させることができないと
記載一している。以上のごとく、従来公知の方法によつ
ては、高Al2O3濃度において経時安定性の優れたア
ルミナゾルを製造する方法は知られていない。Furthermore, the British patent specification states that the alumina gel produced by the patented method cannot be converted into a sol using an organic acid. As described above, among the conventionally known methods, there is no known method for producing an alumina sol with excellent stability over time at a high Al2O3 concentration.
かかる状況下において、本発明者らは経時安定性の顕著
に優れたアルミナゾルを製造すべく鋭意研究を行つた結
果、特定のアルミニウム塩から得られたアルミナゲルを
特定の有機酸、特定の酸根/Al(モル比)の存在下に
処理することによつて上記目的が達成されることを見出
した。すなわち、本発明は一般式Al。Under such circumstances, the present inventors conducted intensive research to produce an alumina sol with significantly superior stability over time, and found that alumina gel obtained from a specific aluminum salt was treated with a specific organic acid, a specific acid group/ It has been found that the above object can be achieved by processing in the presence of Al (molar ratio). That is, the present invention uses general formula Al.
(0H)、XyY2(式中、XはClまたはNO3、Y
はSO4を示し、x+y+22=6、0〈x〈6、0≦
yく6、0≦22く6でY..zは同時に零ではない。
)で表わされる水溶性塩基性アルミニウム塩をアルカリ
により中和して製造したアルミナゲルを有機酸の酸根/
A1のモル比が0.001〜0.005未満となる量の
一価の有機酸の存在下に水熱処理することによりな”る
低粘性、経時安定性の優れたアルミナゾルの製造方法を
提供するものてある。本発明方法に実施に当り、原料ア
ルミナとしては、一般式Al2(0H)、X,Y2(式
中、X,Y,x,yおよびzは前記と同一である。好ま
しくは、1〈x〈5である。)で示される水溶性塩基性
アルミニウム塩をアルカリで中和して得られるアルミナ
ゲルが用いられる。水溶性塩基性アルミニウム塩として
は塩基性塩化アルミニウム、塩基性硝酸アルミニウム、
塩基性硫酸アルミニウムが挙げられ、特に好適には塩基
性塩化アルミニウムが用いられる。(0H), XyY2 (wherein, X is Cl or NO3, Y
indicates SO4, x+y+22=6, 0〈x〈6,0≦
y x 6, 0≦22 x 6, Y. .. z is not zero at the same time.
) Alumina gel produced by neutralizing a water-soluble basic aluminum salt represented by
To provide a method for producing an alumina sol having low viscosity and excellent stability over time, which is obtained by hydrothermal treatment in the presence of a monovalent organic acid in an amount such that the molar ratio of A1 is 0.001 to less than 0.005. In carrying out the method of the present invention, the raw material alumina has the general formula Al2(0H), X, Y2 (wherein, X, Y, x, y and z are the same as above. Preferably, An alumina gel obtained by neutralizing a water-soluble basic aluminum salt represented by 1<x<5) with an alkali is used.As the water-soluble basic aluminum salt, basic aluminum chloride, basic aluminum nitrate, etc. ,
Basic aluminum sulfate is mentioned, and basic aluminum chloride is particularly preferably used.
上記水溶性塩基性アルミニウム塩以外のアルミニウム塩
から生成せしめたアルミナゲルの場合には本発明方法て
存在させる有機酸ては経時安定性のすぐれたアルミナゾ
ルを製造することはできない。In the case of an alumina gel produced from an aluminum salt other than the above-mentioned water-soluble basic aluminum salt, the organic acid present in the method of the present invention cannot produce an alumina sol with excellent stability over time.
またアルカリとしては炭酸アンモニウム、炭酸ナトリウ
ムなどの炭酸塩、炭酸水素ナトリウム、炭酸水素アンモ
ニウムなどの重炭酸塩、アルミン酸ナトリウムなどのア
ルミン酸塩が好ましく用いられるが、他のアルカリ例え
ば水酸化アンモニウム、苛性ソーダなどを用いることも
できる。上記一般式で示される水溶性塩基性アルミニウ
ム塩とアルカリとのゲル生成反応は、100℃より高温
度で反応を実施すると得られるゲルは結晶化が進み解膠
し難くなるので、一般に100℃以下、好しくは約15
〜50℃の温度において実施される。この様にして生成
させたアルミナゲルは、必要により熟成した後、洗浄し
、副生する下純物を除去する。この場合洗浄を重ねるに
従いろ過性が悪化するので希アンモニア水、炭酸アンモ
ニウムのごとき弱アルカリ洗浄し最後に純水で洗浄する
のが好適である。As the alkali, carbonates such as ammonium carbonate and sodium carbonate, bicarbonates such as sodium hydrogen carbonate and ammonium hydrogen carbonate, and aluminates such as sodium aluminate are preferably used, but other alkalis such as ammonium hydroxide and caustic soda are preferably used. etc. can also be used. The gel-forming reaction between the water-soluble basic aluminum salt represented by the above general formula and an alkali is generally carried out at temperatures below 100°C, since if the reaction is carried out at a temperature higher than 100°C, the resulting gel will crystallize and become difficult to peptize. , preferably about 15
It is carried out at a temperature of ~50°C. The alumina gel thus produced is aged if necessary and then washed to remove by-products. In this case, since the filterability deteriorates with repeated washing, it is preferable to wash with a weak alkali such as dilute ammonia water or ammonium carbonate, and finally wash with pure water.
洗浄後のアルミナゲルは通常の枦過、乾燥、またはこれ
らの併用により任意にAI2O3含有率数%〜約7鍾量
%の分散液乃至ケーキ状とすることができるが、その形
態は使用目的により適宜調節される。The alumina gel after washing can be made into a dispersion or a cake with an AI2O3 content of several percent to about 7% by weight by ordinary filtration, drying, or a combination of these, but the form depends on the purpose of use. Adjustments will be made as appropriate.
本発明の実施にあたつては、上記のように水溶性塩基性
アルミニウム塩のアルカリ中和により得られるアルミナ
ゲルを有機酸の酸根/A1のモル比が0.001〜0.
005未満となる量の一価の有機酸の存在下に水熱処理
することによつて、低粘性、高Al2O3濃度化され、
経時安定性に優れたアルミナゾルが得られる。In carrying out the present invention, the alumina gel obtained by alkali neutralization of a water-soluble basic aluminum salt as described above has a molar ratio of organic acid acid group/A1 of 0.001 to 0.
Low viscosity and high Al2O3 concentration are obtained by hydrothermal treatment in the presence of a monovalent organic acid in an amount less than 0.005,
An alumina sol with excellent stability over time can be obtained.
本発明方法の水熱処理の実施に当り使用される一価の有
機酸としては、酢酸、ギ酸などが挙げられ、その存在量
はアルミナゲルスラリー中のAl2O3に対して有機酸
の酸根/A1のモル比が0.001〜0.005未満、
好ましくは約0.002〜0.004である。The monovalent organic acids used in the hydrothermal treatment of the present invention include acetic acid, formic acid, etc., and the amount of the acid radicals of the organic acid/mol of A1 based on Al2O3 in the alumina gel slurry. The ratio is 0.001 to less than 0.005,
Preferably it is about 0.002 to 0.004.
他の酸を用いたのでは、本発明の期待する効果は得られ
ず、また、酸根/AIのモル比が0.001未満になる
と解膠が著しく困難となり生産性が低下するし、また0
.005以上となると特に高Al2O3濃度においては
アルミナゾルの経時安定性が低下する傾向をもつ。有機
酸は水熱処理前のアルミナゲルに添加してもよいし、ま
たアルミナゲル製造時に洗浄後に有機酸が適当量残留す
るように添加してもよく、特に後者の方法は解膠性能に
優れたアルミナゲルが得られるので有効である。If other acids are used, the expected effects of the present invention cannot be obtained, and if the molar ratio of acid radical/AI is less than 0.001, peptization becomes extremely difficult and productivity decreases.
.. 005 or higher, the stability of the alumina sol over time tends to decrease, especially at high Al2O3 concentrations. The organic acid may be added to the alumina gel before hydrothermal treatment, or it may be added during alumina gel production so that an appropriate amount of the organic acid remains after washing, and the latter method has particularly excellent peptizing performance. This method is effective because alumina gel can be obtained.
本水熱処理は約120〜300′C1好ましくは約14
0〜200℃の温度にて0.5〜7時間、好しくは2〜
4時間実施される。This hydrothermal treatment is about 120 to 300' C1, preferably about 14
0.5 to 7 hours, preferably 2 to 7 hours at a temperature of 0 to 200°C
It will be held for 4 hours.
処理温度が約120′Cより低温度であると高Al2O
3濃度のゾルとすることが困難であり、解膠に長時間を
要するようになり、また約300℃より高温度になると
急冷設備、高耐圧容器などを必要とするので望ましくな
い。以上の条件下で水熱処理を行うとアルミナゲルスラ
リーは徐々に解膠し、乳白色から半透明状に変わり、し
かも約3唾量%までの任意のアルミナ濃度のアルミナゾ
ルを製造することができる。When the treatment temperature is lower than about 120'C, high Al2O
It is difficult to form a sol with three concentrations, it takes a long time to peptize, and a temperature higher than about 300° C. requires rapid cooling equipment, a high pressure container, etc., which is not desirable. When the hydrothermal treatment is carried out under the above conditions, the alumina gel slurry gradually peptizes and changes from milky white to translucent, and an alumina sol having an arbitrary alumina concentration up to about 3% can be produced.
本水熱処理により得られたゾルの粘度はAl2O3濃度
が25重量%の場合25゜Cで約60:)PS(センチ
ポイズ以下同じ)と極めて低く、このものは100日以
上放置しても、僅かに粘度が上昇するのみで非常に安定
したものである。このアルミナゾルはX線回析、及び電
子顕微鏡観察の結果ベーマイト態結晶格子を有する約0
.1〜0.02μの大きさの板状乃至棒状であり、繊維
状ではない。The viscosity of the sol obtained by this hydrothermal treatment is extremely low at 25°C when the Al2O3 concentration is 25% by weight, which is approximately 60:)PS (centipoise or less). It is extremely stable, with only an increase in viscosity. As a result of X-ray diffraction and electron microscopic observation, this alumina sol has a boehmite crystal lattice of about 0.
.. It is plate-like or rod-like with a size of 1 to 0.02μ, and is not fibrous.
このように生成させたアルミナゾルは、そのまま分散液
としての用途に用いることもできるしまた噴霧乾燥など
の手段により乾燥しアルミナ粉末となした後、水に再分
散しゾルに転化させるか、または粉末のまま用いること
もできる。The alumina sol produced in this way can be used as it is as a dispersion liquid, or it can be dried by means such as spray drying to form an alumina powder, then redispersed in water and converted into a sol, or it can be used as a powder. It can also be used as is.
以上詳細に説明したごとき本発明方法によれば、公知方
法に比較して低粘性、高Al2O3濃度で著しく経時安
定性の優れたアルミナゾルを製造することができる。According to the method of the present invention as described in detail above, it is possible to produce an alumina sol with lower viscosity, higher Al2O3 concentration, and significantly superior stability over time compared to known methods.
本発明方法により製造されたアルミナゾルは例えばバイ
ンダー、コーティング剤、表面改質剤、ポリマー強化剤
、触媒担体、化粧品、医薬品、エアゾール薬品、ペイン
ト、印刷インクの硬化剤、安定剤などとして特に有用で
ある。The alumina sol produced by the method of the present invention is particularly useful, for example, as a binder, coating agent, surface modifier, polymer reinforcing agent, catalyst support, hardening agent, stabilizer for cosmetics, pharmaceuticals, aerosol chemicals, paints, printing inks, etc. .
以下に実施例により本発明方法を更に詳細に説明するが
、本発明の方法はこれにより制限されるのではない。The method of the present invention will be explained in more detail with reference to Examples below, but the method of the present invention is not limited thereto.
実施例1
A12034.5重量%、0H/A1(当量比)0.4
5の塩基性硝酸アルミニウム水溶液1(1)重量部にN
H33.5重量%の炭酸アンモニウム水溶液723重量
部を20℃にて攪拌しながら添加し、アルミナゲルを製
造した。Example 1 A1203 4.5% by weight, 0H/A1 (equivalent ratio) 0.4
Add N to 1 (1) part by weight of the basic aluminum nitrate aqueous solution of No. 5.
723 parts by weight of an aqueous ammonium carbonate solution containing 33.5% by weight of H3 was added at 20°C with stirring to produce an alumina gel.
生じたアルミナゲルを1時間熟成した後、・洗浄、酒過
しAl2O3含有率9.5重量%のケーキ46.5重量
部を得た。このケーキを90℃のエアーバス中で乾燥し
、Al2O35鍾量%の乾燥ゲル8.4重量部を得た。
この乾燥ゲル1重量部を1.08重量部の水(Al2O
3濃度25重量%)に分散させアルミナゲルスラリーを
調製した。After aging the resulting alumina gel for 1 hour, it was washed and filtered to obtain 46.5 parts by weight of a cake with an Al2O3 content of 9.5% by weight. This cake was dried in an air bath at 90°C to obtain 8.4 parts by weight of a dry gel containing 5% Al2O3.
1 part by weight of this dry gel was mixed with 1.08 parts by weight of water (Al2O
3 (concentration: 25% by weight) to prepare an alumina gel slurry.
このスラリーに第1表に示す酢酸量を添加しガラス製オ
ートクレーブに移し150〜160℃の温度で2時間水
熱処理した。その結果、得られたアルミナゾルの性状を
第11表に示す。実施例2
A1。The amount of acetic acid shown in Table 1 was added to this slurry, which was then transferred to a glass autoclave and subjected to hydrothermal treatment at a temperature of 150 to 160°C for 2 hours. Table 11 shows the properties of the alumina sol obtained. Example 2 A1.
034.5重量%、0H/A1(当量比)0.43の塩
基性塩化アルミニウム水溶液100重量部に10.9重
量%のNa2cO3水溶液75.鍾量部を20℃にて攪
拌しながら30分間で添加しアルミナゲルを製造した。034.5% by weight, 0H/A1 (equivalent ratio) 0.43 basic aluminum chloride aqueous solution (100 parts by weight) and 10.9% by weight Na2cO3 aqueous solution 75%. The weighing portion was added over 30 minutes while stirring at 20°C to produce alumina gel.
生じたアルミナゲルを1時間熟成した後、洗浄、P過し
Al2O3含有率9.64重量%のケーキ45.8重量
部を得た。このケーキを90℃のエアバス中で乾燥し、
Al2O35l.踵量%の乾燥ゲル8.5重量部を得た
。その乾燥ゲル1重量部を0.8踵量部の水(Al.O
3濃度27.5重量%)に分散させアルミナゲルスラリ
ーを調製した。このスラリーに第2表に示す量のギ酸を
添加し、ガラス製オートクレーブ中に移し150〜16
0℃の温度で2時間水熱処理した。その結果、得られた
アルミナゾルの性状は第2表に示す通りであり、解膠率
は90.9%であつた。The resulting alumina gel was aged for 1 hour, then washed and filtered through P to obtain 45.8 parts by weight of a cake with an Al2O3 content of 9.64% by weight. This cake was dried in an air bath at 90°C.
Al2O35l. 8.5 parts by weight of dry gel (heel weight %) was obtained. 1 part by weight of the dry gel was mixed with 0.8 parts by weight of water (Al.O.
3 (concentration: 27.5% by weight) to prepare an alumina gel slurry. To this slurry, the amount of formic acid shown in Table 2 was added, and the slurry was transferred to a glass autoclave.
Hydrothermal treatment was carried out at a temperature of 0° C. for 2 hours. As a result, the properties of the alumina sol obtained were as shown in Table 2, and the peptization rate was 90.9%.
比較例1実施例2と同様にして得たアルミナゲルスラリ
ーに酸根/A1(モル比)0.0008となる量のギ酸
を添加しガラス製オートクレーブ中に移し150〜16
0℃の温度で2時間水熱処理した。Comparative Example 1 To the alumina gel slurry obtained in the same manner as in Example 2, formic acid was added in an amount such that the acid radical/A1 (molar ratio) was 0.0008, and the mixture was transferred into a glass autoclave and was mixed with an alumina gel slurry of 150 to 16
Hydrothermal treatment was carried out at a temperature of 0° C. for 2 hours.
その結果、得られたアルミナゾルのAl2O3濃度は1
9.1重量%であり、解膠率は69.5%であつた。As a result, the Al2O3 concentration of the obtained alumina sol was 1
The peptization rate was 9.1% by weight, and the peptization rate was 69.5%.
Claims (1)
XはClまたはNO_3、YはSO_4を示し、x+y
+2_z=6、0<X<6、0≦y<6、0≦2_z<
6でyで、zは同時に零ではない。 )で表わされる水溶性塩基性アルミニウム塩をアルカリ
により中和して得られるアルミナゲルを、有機酸の酸根
/Alのモル比が0.001〜0.005未満となる量
の一価の有機酸の存在下に水熱処理することを特徴とす
るアルミナゾルの製造法。2 水溶性塩基性アルミニウ
ム塩が塩基性塩化アルミニウムである特許請求の範囲第
1項記載のアルミナゾルの製造法。 3 水溶性塩基性アルミニウム塩のアルカリによる中和
を約15〜50℃の温度において実施する特許請求の範
囲第1項または第2項記載のアルミナゾルの製造法。 4 水熱処理を約120〜300℃の温度にて実施する
特許請求の範囲第1〜3項のいずれかに記載のアルミナ
ゾルの製造法。 5 水熱処理を約140〜200℃の温度にて実施する
特許請求の範囲第4項記載のアルミナゾルの製造法。 6 一価の有機酸が酢酸である特許請求の範囲第1〜5
項いずれかに記載のアルミナゾルの製造法。[Claims] 1 General formula Al_2(OH)_xX_yY_z (in the formula,
X represents Cl or NO_3, Y represents SO_4, x+y
+2_z=6, 0<X<6, 0≦y<6, 0≦2_z<
6, y, and z are not zero at the same time. ) Alumina gel obtained by neutralizing a water-soluble basic aluminum salt represented by an alkali with an alkali is mixed with a monovalent organic acid in an amount such that the molar ratio of organic acid acid group/Al is 0.001 to less than 0.005. A method for producing alumina sol, characterized by hydrothermal treatment in the presence of. 2. The method for producing an alumina sol according to claim 1, wherein the water-soluble basic aluminum salt is basic aluminum chloride. 3. The method for producing an alumina sol according to claim 1 or 2, wherein the water-soluble basic aluminum salt is neutralized with an alkali at a temperature of about 15 to 50°C. 4. The method for producing an alumina sol according to any one of claims 1 to 3, wherein the hydrothermal treatment is carried out at a temperature of about 120 to 300°C. 5. The method for producing an alumina sol according to claim 4, wherein the hydrothermal treatment is carried out at a temperature of about 140 to 200°C. 6 Claims 1 to 5 in which the monovalent organic acid is acetic acid
A method for producing an alumina sol according to any of the above.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53024237A JPS6045125B2 (en) | 1978-03-02 | 1978-03-02 | Manufacturing method of alumina sol |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53024237A JPS6045125B2 (en) | 1978-03-02 | 1978-03-02 | Manufacturing method of alumina sol |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54116398A JPS54116398A (en) | 1979-09-10 |
JPS6045125B2 true JPS6045125B2 (en) | 1985-10-08 |
Family
ID=12132638
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53024237A Expired JPS6045125B2 (en) | 1978-03-02 | 1978-03-02 | Manufacturing method of alumina sol |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6045125B2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5989515A (en) * | 1996-07-24 | 1999-11-23 | Nissan Chemical Industries, Ltd. | Process for producing an acidic aqueous alumina sol |
US6565950B1 (en) | 1998-06-18 | 2003-05-20 | Canon Kabushiki Kaisha | Recording medium, image forming method utilizing the same, method for producing the same, alumina dispersion and method for producing the same |
JP4841851B2 (en) * | 2005-03-02 | 2011-12-21 | 電気化学工業株式会社 | Alumina and production method thereof |
JP4818163B2 (en) * | 2007-03-01 | 2011-11-16 | 日揮触媒化成株式会社 | Alumina support, hydrodemetallation catalyst using the same, and production method thereof |
JP4916944B2 (en) * | 2007-04-19 | 2012-04-18 | 中国電力株式会社 | Mooring equipment |
JP2009196326A (en) | 2008-02-25 | 2009-09-03 | Fujifilm Corp | Inkjet recording medium and method for manufacturing the same |
EP4261190A1 (en) | 2020-12-09 | 2023-10-18 | Namics Corporation | Alumina-based composite sol composition, production method therefor, and production method for alumina-based composite thin film |
-
1978
- 1978-03-02 JP JP53024237A patent/JPS6045125B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS54116398A (en) | 1979-09-10 |
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