JP2000053412A - Production of powder white carbon - Google Patents
Production of powder white carbonInfo
- Publication number
- JP2000053412A JP2000053412A JP10224390A JP22439098A JP2000053412A JP 2000053412 A JP2000053412 A JP 2000053412A JP 10224390 A JP10224390 A JP 10224390A JP 22439098 A JP22439098 A JP 22439098A JP 2000053412 A JP2000053412 A JP 2000053412A
- Authority
- JP
- Japan
- Prior art keywords
- water
- cake
- white carbon
- neutralization
- drying
- 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.)
- Pending
Links
Landscapes
- Silicon Compounds (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Paper (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、製紙要填料、プラ
スチックやゴムなどの充填剤、薬品等の坦持媒体などに
使用される粉体ホワイトカーボンの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing powdered white carbon used as a filler required for papermaking, a filler such as plastic or rubber, a carrier medium for chemicals and the like.
【０００２】[0002]
【従来の技術】ホワイトカーボンは一般に直径が数十ｎ
ｍの一次粒子が凝集し数百ｎｍから数百μｍの微粒子と
して存在し、その吸油性が高いことから製紙要填料、農
薬等の薬品担体、プラスチックやゴムなどの充填剤、そ
の他各種用途に広く利用されている。2. Description of the Related Art White carbon generally has a diameter of several tens of nanometers.
m primary particles are agglomerated and exist as fine particles of several hundred nm to several hundred μm, and because of their high oil-absorbing property, they are widely used for papermaking fillers, chemical carriers such as agricultural chemicals, fillers such as plastic and rubber, and other various applications It's being used.
【０００３】従来からホワイトカーボンは、その目的で
ある吸油量の改善ということに多くの研究が行われてき
た。たとえば特開昭６０−６５７１３ではホワイトカー
ボンの合成過程における中和度を規定することにより、
抄紙用填料として用いたときの歩留まりが高くかつ、優
れた吸油能による高印刷後不透明度が得られるホワイト
カーボンの製造法を開示している。また、特公平４−６
５００８では同様に合成時の中和工程を規定することに
より、ホワイトカーボンの粒度をコントロールするとと
もに、吸油能の優れたホワイトカーボンを得る方法を開
示している。しかしこれらの改良されたホワイトカーボ
ンでさえ、ＪＩＳＫ５１０１による測定法で求められた
吸油量はたかだか３００ｍｌ／１００ｇであり、さらな
る向上が望まれている。[0003] Conventionally, much research has been conducted on the purpose of improving the oil absorption of white carbon. For example, Japanese Patent Application Laid-Open No. 60-65713 defines the degree of neutralization in the process of synthesizing white carbon.
Disclosed is a method for producing white carbon, which has a high yield when used as a filler for papermaking and provides high opacity after printing due to excellent oil absorption. In addition, 4-6
No. 5008 discloses a method for similarly controlling the particle size of white carbon and obtaining a white carbon having excellent oil absorbing ability by defining a neutralization step at the time of synthesis. However, even with these improved white carbons, the oil absorption determined by the measurement method according to JIS K5101 is at most 300 ml / 100 g, and further improvement is desired.
【０００４】[0004]
【発明が解決しようとする課題】本発明の目的は、粉体
ホワイトカーボンの製造方法において、吸油性の非常に
優れた粉体ホワイトカーボンの製造方法を提供すること
にある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for producing powdered white carbon which is very excellent in oil absorbency.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するた
め、本発明は以下の構成を採用する。即ち、本発明は、
「ケイ酸アルカリ水溶液を鉱酸で中和することにより水
和ケイ酸をスラリー状に析出させ、該スラリーを濾過し
て含水ケーキとし、該含水ケーキを乾燥して得る粉体ホ
ワイトカーボンの製造方法において、該含水ケーキを８
０℃以下で乾燥することを特徴とする粉体ホワイトカー
ボンの製造方法」である。In order to solve the above problems, the present invention employs the following constitution. That is, the present invention
"A method for producing powdery white carbon obtained by neutralizing an aqueous alkali silicate solution with a mineral acid to precipitate hydrated silicic acid in a slurry form, filtering the slurry to form a water-containing cake, and drying the water-containing cake. In 8, the hydrated cake is
A method for producing powdered white carbon, characterized by drying at 0 ° C. or lower ”.
【０００６】また、本発明は、前記発明において、前記
含水ケーキの水を親水性の有機溶媒で置換して乾燥する
粉体ホワイトカーボンの製造方法を含む。The present invention also includes a method for producing powdered white carbon in the above invention, wherein the water of the water-containing cake is replaced with a hydrophilic organic solvent and dried.
【０００７】更に、本発明は、前記発明において、ケイ
酸アルカリ水溶液の中和において、まずケイ酸アルカリ
水溶液に第一の鉱酸を添加し、次いで液温を７０〜９５
℃まで昇温し、更に液温を該温度に保持しながら、第二
の鉱酸を液ｐＨが３〜６．５の範囲になるまで添加する
ことを特徴とする粉体ホワイトカーボンの製造方法を態
様として含む。Further, according to the present invention, in the above-mentioned invention, in neutralizing the aqueous solution of alkali silicate, first, a first mineral acid is added to the aqueous solution of alkali silicate, and then the solution temperature is increased to 70 to 95.
C. and further adding the second mineral acid until the liquid pH is in the range of 3 to 6.5 while maintaining the liquid temperature at the same temperature. As an embodiment.
【０００８】前記態様において、第一の鉱酸が、全体を
中和するのに必要な量の３０％以上、５５％以下である
ことが望ましい。[0008] In the above embodiment, the first mineral acid is desirably 30% or more and 55% or less of the amount required to neutralize the whole.
【０００９】[0009]
【発明の実施の形態】本発明で用いられるケイ酸アルカ
リ水溶液は、特に限定されないが、ケイ酸ソーダ水溶液
又はケイ酸カリウム水溶液が好適である。ケイ酸アルカ
リがケイ酸ナトリウムの場合、濃度はモル比（ＳｉＯ2
／Ｎａ2Ｏ）が２．０〜３．４の範囲から選ぶのが好適
である。又、ケイ酸アルカリ水溶液の濃度は、水溶液中
のケイ酸（ＳｉＯ2）分で２〜１５重量％の範囲から選
ばれる。この範囲よりも濃度が高いと反応中の溶液の粘
度が高くなってしまい、又、低いと反応液量が多くなっ
て非効率的である。更に、反応中においても反応液中の
ケイ酸濃度を２〜１５重量％の範囲に保持することが望
ましい。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The aqueous solution of alkali silicate used in the present invention is not particularly limited, but an aqueous solution of sodium silicate or an aqueous solution of potassium silicate is preferred. When the alkali silicate is sodium silicate, the concentration is the molar ratio (SiO 2
/ Na 2 O) is preferably selected from the range of 2.0 to 3.4. The concentration of the aqueous alkali silicate solution is selected from the range of 2 to 15% by weight in terms of silicic acid (SiO 2 ) in the aqueous solution. If the concentration is higher than this range, the viscosity of the solution during the reaction increases, and if the concentration is lower, the amount of the reaction solution increases, which is inefficient. Further, it is desirable to keep the silicic acid concentration in the reaction solution in the range of 2 to 15% by weight even during the reaction.
【００１０】本発明で使用される鉱酸としては、特に限
定されず公知のものが使用され、具体的には、塩酸、硫
酸、硝酸等の無機酸が挙げられるが、硫酸は入手が容易
で且つ安価であるため好適に用いられる。鉱酸の添加時
の濃度は、特に限定されないが、一般的には１０〜３０
重量％の範囲から選ばれる。The mineral acid used in the present invention is not particularly limited and known ones can be used. Specific examples include inorganic acids such as hydrochloric acid, sulfuric acid and nitric acid. Sulfuric acid is easily available. It is preferably used because it is inexpensive. The concentration at the time of addition of the mineral acid is not particularly limited, but is generally 10 to 30.
It is selected from the range of weight%.
【００１１】本発明ではより吸油量の高い粉体ホワイト
カーボンを提供することが目的であるため、ケイ酸アル
カリ水溶液の中和反応を二段階に分けることが好まし
い。すなわちケイ酸アルカリ水溶液に第一の鉱酸を添加
し、次いで７０〜９５℃まで昇温した後第二の鉱酸を添
加する。Since the object of the present invention is to provide powdery white carbon having a higher oil absorption, it is preferable to divide the neutralization reaction of the aqueous alkali silicate solution into two stages. That is, the first mineral acid is added to the aqueous alkali silicate solution, then the temperature is raised to 70 to 95 ° C., and then the second mineral acid is added.
【００１２】添加される第一の鉱酸は添加開始時点での
ケイ酸アルカリ水溶液の温度が２０〜５５℃で開始する
ことが好ましいが、粘度が上昇する等の製造上の問題が
なければこの温度の範囲外で添加してもかまわない。こ
の第一の鉱酸の添加量は、全ケイ酸アルカリ水溶液を中
和するのに要する全鉱酸量の０〜６０重量％の範囲の量
であるが、より高い吸油量を得るためには３０〜５５％
の範囲が好ましい。これらの酸は添加する際に水溶液が
部分的にでもｐＨ７を下まわることのないように、連続
的に十分攪拌しながら添加する。The first mineral acid to be added preferably starts at a temperature of the aqueous solution of alkali silicate at the start of the addition of 20 to 55 ° C., but if there is no production problem such as an increase in viscosity, this is added. It may be added outside the temperature range. The amount of the first mineral acid to be added is in the range of 0 to 60% by weight of the total amount of the mineral acid required to neutralize the total aqueous alkali silicate solution. 30-55%
Is preferable. These acids are continuously added with sufficient stirring so that the pH of the aqueous solution does not fall below pH 7, even partially.
【００１３】昇温後、中和に必要な残りの鉱酸（第二の
鉱酸）を、上記第一の鉱酸と同様な方法で添加する。水
和ケイ酸の２次粒子の熟成は、第二の鉱酸の添加前の
み、又は添加前と添加後の両方で行ってもよい。また、
粘度調整剤、析出助剤、分散剤等の各種助剤を添加する
ことも可能である。After the temperature is raised, the remaining mineral acid (second mineral acid) required for neutralization is added in the same manner as in the first mineral acid. The aging of the secondary particles of hydrated silicic acid may be performed only before the addition of the second mineral acid, or both before and after the addition. Also,
It is also possible to add various auxiliaries such as a viscosity adjuster, a deposition aid, and a dispersant.
【００１４】このようにしてできあがった水和ケイ酸ス
ラリーは冷却後フィルタープレス、回転式フィルター等
の通常粉体の分別処理に用いられる公知のフィルターで
ろ過し、含水ケーキとした後乾燥する。通常水を含む含
水ケーキの乾燥は、水の蒸気圧が大気圧を越える条件、
すなわち１００℃以上で行うことにより製造効率を上げ
ているが、本発明においては少なくとも８０℃以下好ま
しくは５５℃以下で乾燥しなければならない。The hydrated silicic acid slurry thus obtained is cooled, filtered with a filter known in the art for separating powders, such as a filter press or a rotary filter, to obtain a water-containing cake, followed by drying. Drying of a water-containing cake containing water is usually performed under conditions where the vapor pressure of water exceeds atmospheric pressure.
That is, the production efficiency is increased by carrying out at 100 ° C. or higher, but in the present invention, drying must be performed at least at 80 ° C. or lower, preferably at 55 ° C. or lower.
【００１５】ここで乾燥工程を８０℃以下に抑えること
により、水和ケイ酸が析出したときすなわち含水ケーキ
中の水和ケイ酸の構造を保持したまま粉体にすることが
できる。従来のように１００℃を超える温度で乾燥する
と、水和ケイ酸がスラリー中でもっていた構造が乾燥収
縮により変化する。特にこれまで述べた吸油量を高める
条件で合成した水和ケイ酸ほど熱による収縮度合いが高
く、それによる吸油量の低下が著しくなるため、本発明
の効果もそれに伴って大きくなる。By controlling the drying step to 80 ° C. or lower, a powder can be formed when the hydrated silicic acid is precipitated, that is, while the structure of the hydrated silicic acid in the wet cake is maintained. When drying is performed at a temperature exceeding 100 ° C. as in the related art, the structure in which hydrated silicic acid is present in the slurry changes due to drying shrinkage. In particular, the hydrated silicic acid synthesized under the condition of increasing the oil absorption described above has a higher degree of shrinkage due to heat, and the oil absorption is significantly reduced by the heat. Therefore, the effect of the present invention is correspondingly increased.
【００１６】乾燥を低温で行うと、時間がかかるので、
乾燥時間を短縮する方法を併用することは好ましい。そ
の方法として、減圧下での乾燥、乾燥エアーによる送風
乾燥、溶媒置換による乾燥などが可能な方法である。If the drying is performed at a low temperature, it takes time,
It is preferable to use a method for shortening the drying time. Examples of the method include drying under reduced pressure, blast drying with dry air, and drying by solvent replacement.
【００１７】溶媒置換の場合、親水性の溶媒中に含水ケ
ーキを分散し、再度ろ過した後に乾燥する方法が好まし
い。このとき、ケーキに含まれる水分をホワイトカーボ
ン粉体として十分な程度まで低く抑えられれば、実際に
は乾燥工程を取り除くこともできる。親水性の有機溶媒
としては、特に限定されず公知のものが使用される。具
体的には、メタノール、エタノール、アセトン等の一般
的な有機溶媒が好適に用いられる。In the case of solvent replacement, it is preferable to disperse the water-containing cake in a hydrophilic solvent, filter again, and then dry. At this time, if the moisture contained in the cake can be suppressed to a sufficient level as white carbon powder, the drying step can be actually removed. The hydrophilic organic solvent is not particularly limited, and a known organic solvent is used. Specifically, common organic solvents such as methanol, ethanol, acetone and the like are suitably used.
【００１８】[0018]
【実施例】以下に実施例を挙げて本発明をより具体的に
説明するが、本発明は勿論これらに限定されるものでは
ない。尚、以下の実施例において、％は、全て重量％で
ある。EXAMPLES The present invention will be described more specifically with reference to examples below, but the present invention is of course not limited to these. In the following examples, all percentages are by weight.
【００１９】＜実施例１＞ ＜ホワイトカーボンの合成＞市販のＪＩＳ３号ケイ酸ソ
ーダ水溶液（徳山曹達製、ＳｉＯ2濃度３０％）２４０
ｇを純水にて１０００ｇに希釈し、ＳｉＯ２濃度を７２
ｇ／ｋｇとして２リットルのステンレスビーカーに入
れ、温度５０℃において無水硫酸ナトリウム１７．９ｇ
を加え、プロペラ攪拌機（スリーワンモーター）で１２
００ｒｐｍにて攪拌した後、硫酸（濃度２０％）９０ｇ
を１５分間かけて連続的に添加した。硫酸の添加が終わ
った後、攪拌しながら１７分間で温度を９０℃まで昇温
した。この温度でそのまま攪拌を続け１０分間熟成を行
い、次いで、残りの硫酸９０ｇを１７分間かけて連続的
に添加した後９０℃にて２０分間熟成した。熟成後、３
０分かけて反応液を５０℃まで冷却した。この時のスラ
リーのｐＨは５．７であった。次いで、このスラリーを
ブフナーロートにて濾過し、水分４０％のケーキ状ホワ
イトカーボン（含水ケーキ）を得た。<Example 1><Synthesis of White Carbon> Commercially available JIS No. 3 sodium silicate aqueous solution (manufactured by Tokuyama Soda, SiO 2 concentration 30%) 240
g was diluted with pure water to 1000 g, and the SiO2 concentration was reduced to 72 g.
g / kg in a 2 liter stainless beaker, and at a temperature of 50 ° C., 17.9 g of anhydrous sodium sulfate.
With a propeller stirrer (three one motor)
After stirring at 00 rpm, 90 g of sulfuric acid (concentration: 20%)
Was added continuously over 15 minutes. After the addition of sulfuric acid was completed, the temperature was raised to 90 ° C. over 17 minutes with stirring. At this temperature, stirring was continued and aging was performed for 10 minutes. Then, 90 g of the remaining sulfuric acid was continuously added over 17 minutes, and then aging was performed at 90 ° C. for 20 minutes. After aging, 3
The reaction was cooled to 50 ° C. over 0 minutes. At this time, the pH of the slurry was 5.7. Next, this slurry was filtered with a Buchner funnel to obtain cake-like white carbon (water-containing cake) having a water content of 40%.
【００２０】＜ケーキ状ホワイトカーボンの乾燥＞ケー
キを５００ｍｌのアセトン中に投入し、スリーワンモー
ターにて４００ｒｐｍで１０分攪拌した後、再びブフナ
ーロートにてしばらくの間濾過し、水分１％未満の粉体
ホワイトカーボンを得た。<Drying of cake-like white carbon> The cake was put into 500 ml of acetone, stirred at 400 rpm for 10 minutes with a three-one motor, and then filtered again for a while with a Buchner funnel to obtain a powder having a water content of less than 1%. A body white carbon was obtained.
【００２１】＜吸油量の測定＞ＪＩＳ Ｋ５１０１に準
拠して測定を行った。<Measurement of Oil Absorption> Measurement was carried out in accordance with JIS K5101.
【００２２】＜実施例２＞ホワイトカーボンの合成にお
いて、３号ケイ酸ソーダ水溶液１２０ｇを純水にて１０
００ｇに希釈し、温度５０℃において無水硫酸ナトリウ
ム１７．９ｇを加え、プロペラ攪拌機（スリーワンモー
ター）で１２００ｒｐｍにて攪拌した後、硫酸（濃度２
０％）５４ｇを１０分間かけて連続的に添加し、昇温、
熟成した後、残りの硫酸１２６ｇを２０分間かけて連続
的に添加した以外は、実施例１と同様に処理し、更に得
られた粉体ホワイトカーボンを実施例１と同様にして評
価した。Example 2 In the synthesis of white carbon, 120 g of an aqueous solution of sodium silicate No. 3 was added with pure water for 10 times.
At a temperature of 50 ° C., 17.9 g of anhydrous sodium sulfate was added, and the mixture was stirred at 1200 rpm with a propeller stirrer (three-one motor).
0%) 54 g continuously over 10 minutes,
After aging, the same treatment as in Example 1 was carried out except that the remaining 126 g of sulfuric acid was continuously added over 20 minutes, and the obtained powdered white carbon was evaluated in the same manner as in Example 1.
【００２３】＜実施例３＞ケーキ状ホワイトカーボンを
よくほぐし、減圧乾燥器中で５０℃、真空度５０ｍｍＨ
ｇで３時間乾燥させて水分１％未満の粉体ホワイトカー
ボンを得た以外は実施例１と同様に処理し、更に得られ
た粉体ホワイトカーボンを実施例１と同様にして評価し
た。<Example 3> The cake-like white carbon was loosened well, and dried in a vacuum drier at 50 ° C and a degree of vacuum of 50 mmH.
g of powdered white carbon having a moisture content of less than 1% was obtained by drying for 3 hours, and the powdered white carbon obtained was evaluated in the same manner as in Example 1.
【００２４】＜比較例１＞実施例１において得たケーキ
状ホワイトカーボンを熱風乾燥器にて１０５℃、３時間
乾燥させた以外は、実施例１と同様にして水分１％未満
の粉体ホワイトカーボンを得、更に得られた粉体ホワイ
トカーボンを実施例１と同様にして評価した。Comparative Example 1 A powdery white carbon having a water content of less than 1% was obtained in the same manner as in Example 1 except that the cake-like white carbon obtained in Example 1 was dried at 105 ° C. for 3 hours using a hot air drier. Carbon was obtained, and the obtained powdered white carbon was evaluated in the same manner as in Example 1.
【００２５】＜比較例２＞実施例２において得たケーキ
状ホワイトカーボンを熱風乾燥器にて１０５℃、３時間
乾燥させた以外は、実施例２と同様にして水分１％未満
の粉体ホワイトカーボンを得、更に得られた粉体ホワイ
トカーボンを実施例２と同様にして評価した。<Comparative Example 2> Powder white having a water content of less than 1% was obtained in the same manner as in Example 2 except that the cake-like white carbon obtained in Example 2 was dried with a hot air drier at 105 ° C for 3 hours. Carbon was obtained, and the obtained powdered white carbon was evaluated in the same manner as in Example 2.
【００２６】比較例３ 実施例１において温度５０℃で硫酸を３６ｇ５分かけて
連続的に添加し、９０度に昇温させ１０分間の熟成後残
りの硫酸１４４ｇを２５分間かけて連続的に添加し次い
で熟成させた以外は、実施例２と同様にして水分１％未
満の粉体ホワイトカーボンを得、更に得られた粉体ホワ
イトカーボンを実施例１と同様にして評価した。Comparative Example 3 In Example 1, 36 g of sulfuric acid was continuously added at a temperature of 50 ° C. over 5 minutes, heated to 90 ° C., aged for 10 minutes, and 144 g of the remaining sulfuric acid was continuously added over 25 minutes. Then, powdered white carbon having a water content of less than 1% was obtained in the same manner as in Example 2 except for aging, and the obtained powdered white carbon was evaluated in the same manner as in Example 1.
【００２７】実施例、比較例で得られた結果を表１に示
した。Table 1 shows the results obtained in Examples and Comparative Examples.
【表１】 [Table 1]
【００２８】表１から明らかな如く、本発明法によって
得られる粉体ホワイトカーボンの吸油量はそれらの乾燥
温度を高くしたものに比べ優れていることがわかる（実
施例１、２と比較例１，２）。また、乾燥は有機溶媒で
置換する必要はなく、温度が低ければ十分であることが
わかる。この実施例では時間を短縮するために真空乾燥
器を用いたが、時間をかければ自然乾燥で何ら問題はな
い。As is clear from Table 1, the oil absorption of the powdered white carbon obtained by the method of the present invention is superior to those obtained by increasing the drying temperature (Examples 1 and 2 and Comparative Example 1). , 2). In addition, it is understood that the drying does not need to be replaced with an organic solvent, and that a lower temperature is sufficient. In this embodiment, a vacuum dryer was used to reduce the time, but if it takes time, there is no problem in natural drying.
【００２９】[0029]
【発明の効果】以上説明したように、本発明は、スラリ
ー状で得られたケイ酸ソーダを８０℃以下の条件で乾燥
させることにより、吸油性の非常に優れた粉体ホワイト
カーボンを得ることができる。As described above, according to the present invention, powdery white carbon having extremely excellent oil absorbing properties can be obtained by drying sodium silicate obtained in a slurry state at a temperature of 80 ° C. or less. Can be.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 北尾 修 東京都江東区東雲一丁目10番６号 王子製 紙株式会社東雲研究センター内 (72)発明者 中井 敬裕 東京都江東区東雲一丁目10番６号 王子製 紙株式会社東雲研究センター内 Ｆターム(参考） 4G072 AA28 BB05 CC13 GG03 HH21 JJ15 LL06 LL07 MM01 MM02 MM21 MM22 MM31 PP06 RR06 RR12 UU09 UU17 UU25 4J002 AA001 AC001 DJ016 FD016 4L055 AG18 AH01 FA30 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Osamu Kitao 1-10-6 Shinonome, Koto-ku, Tokyo Inside Oji Paper Co., Ltd. Shinonome Research Center (72) Inventor Takahiro Nakai 1-1-10 Shinonome, Koto-ku, Tokyo No. 6 Oji Paper Co., Ltd. Shinonome Research Center F term (reference) 4G072 AA28 BB05 CC13 GG03 HH21 JJ15 LL06 LL07 MM01 MM02 MM21 MM22 MM31 PP06 RR06 RR12 UU09 UU17 UU25 4J002 AA001 AC001 DJ016 FD016 A30 FA0
Claims (2)
ことにより水和ケイ酸をスラリー状に析出させ、該スラ
リーを濾過して含水ケーキとし、該含水ケーキを乾燥し
て得る粉体ホワイトカーボンの製造方法において、該含
水ケーキを８０℃以下で乾燥することを特徴とする粉体
ホワイトカーボンの製造方法。1. An aqueous alkali silicate solution is neutralized with a mineral acid to precipitate hydrated silicic acid in the form of a slurry. The slurry is filtered to obtain a water-containing cake, and the powdery white powder obtained by drying the water-containing cake is obtained. A method for producing powdered white carbon, wherein the wet cake is dried at 80 ° C. or lower.
で置換して乾燥することを特徴とする請求項１に記載の
粉体ホワイトカーボンの製造方法。2. The method for producing powdered white carbon according to claim 1, wherein water in the water-containing cake is replaced with a hydrophilic organic solvent and dried.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10224390A JP2000053412A (en) | 1998-08-07 | 1998-08-07 | Production of powder white carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10224390A JP2000053412A (en) | 1998-08-07 | 1998-08-07 | Production of powder white carbon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000053412A true JP2000053412A (en) | 2000-02-22 |
Family
ID=16813005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10224390A Pending JP2000053412A (en) | 1998-08-07 | 1998-08-07 | Production of powder white carbon |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000053412A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111777077A (en) * | 2020-06-26 | 2020-10-16 | 中国轻工业长沙工程有限公司 | Clean production method of white carbon black |
| CN111892061A (en) * | 2020-09-02 | 2020-11-06 | 江西星火狮达科技有限公司 | White carbon black with high specific surface area and preparation method thereof |
| CN113336235A (en) * | 2021-06-30 | 2021-09-03 | 确成硅化学股份有限公司 | Preparation method of high-dispersion white carbon black special for high-controllability tire |
| CN114751421A (en) * | 2022-05-16 | 2022-07-15 | 通化双龙化工股份有限公司 | High-adsorbability white carbon black |
-
1998
- 1998-08-07 JP JP10224390A patent/JP2000053412A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111777077A (en) * | 2020-06-26 | 2020-10-16 | 中国轻工业长沙工程有限公司 | Clean production method of white carbon black |
| CN111892061A (en) * | 2020-09-02 | 2020-11-06 | 江西星火狮达科技有限公司 | White carbon black with high specific surface area and preparation method thereof |
| CN111892061B (en) * | 2020-09-02 | 2022-04-29 | 江西星火狮达科技有限公司 | White carbon black with high specific surface area and preparation method thereof |
| CN113336235A (en) * | 2021-06-30 | 2021-09-03 | 确成硅化学股份有限公司 | Preparation method of high-dispersion white carbon black special for high-controllability tire |
| CN114751421A (en) * | 2022-05-16 | 2022-07-15 | 通化双龙化工股份有限公司 | High-adsorbability white carbon black |
| CN114751421B (en) * | 2022-05-16 | 2023-10-10 | 通化双龙化工股份有限公司 | Preparation method of high-adsorptivity white carbon black |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4117105A (en) | Process for preparing dispersible boehmite alumina | |
| JP2002526356A (en) | Highly activated carbon by caustic digestion of rice husk ash and its method | |
| JPS6250403B2 (en) | ||
| JP2908253B2 (en) | Hydrated silica and its production method | |
| JP2003529518A (en) | Precipitated silica and silica gel with or without deposited carbon from biomass ash solution and process | |
| US2114123A (en) | Amorphous precipitated silica and method of preparation thereof | |
| JP5931369B2 (en) | Phosphorus recovery material and method for producing the same | |
| JP4804616B2 (en) | Porous body and method for producing the same | |
| WO2018167646A1 (en) | A process for preparing sodium silicate from rice husk ash | |
| JP2000053412A (en) | Production of powder white carbon | |
| JP3462610B2 (en) | Hydrophobic metatitanate fine particles and method for producing the same | |
| EP1587755A1 (en) | Process for the production of synthetic magnesium silicate compositions | |
| KR20020023213A (en) | Process for the preparation of discrete particles of calcium carbonate | |
| JP3084125B2 (en) | Filler for paper and paper using it | |
| WO2018167648A1 (en) | A process for preparing silica from rice husk ash | |
| JP2004529054A (en) | Oxide extracted from plant material and extraction method | |
| US4226636A (en) | Production of calcium silicate having high specific bulk volume and calcium silicate-gypsum composite | |
| US3716493A (en) | Process for making fine sized low density silica | |
| JPH1135319A (en) | Barium sulfate and its production | |
| JPH05178606A (en) | Production of hydrated silicic acid for paper making | |
| JPH1149511A (en) | Mesoporous silica and its production | |
| WO2018167682A1 (en) | A process for preparing water glass from rice husk ash | |
| JP3894518B2 (en) | Scale-like low crystalline silica and process for producing the same | |
| JP3610510B2 (en) | Method for producing alumina hydrate dispersion | |
| US5401484A (en) | Process for producing metal hydroxides with a small specific area |