JPS6163528A - Method for improving fluidity of lime powder - Google Patents
Method for improving fluidity of lime powderInfo
- Publication number
- JPS6163528A JPS6163528A JP18399584A JP18399584A JPS6163528A JP S6163528 A JPS6163528 A JP S6163528A JP 18399584 A JP18399584 A JP 18399584A JP 18399584 A JP18399584 A JP 18399584A JP S6163528 A JPS6163528 A JP S6163528A
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- Prior art keywords
- lime powder
- mol
- fluidity
- general formula
- compound
- 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.)
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
【発明の詳細な説明】
sitΔ杜111
本発明は石灰粉の流動性を改善する方法に関し、更に詳
述すると操作上安全にしかも簡単かつ確実に石灰粉の流
動性を改善することができる石灰粉流動性改善方法に関
する。DETAILED DESCRIPTION OF THE INVENTION sitΔMori111 The present invention relates to a method for improving the fluidity of lime powder, and more specifically, a method for improving the fluidity of lime powder, which is operationally safe, simple and reliable. Concerning methods for improving liquidity.
従来技術及びその
従来より、石灰粉、特に生石灰粉は耐火物製造、バルブ
及び紙の処理剤、脱硫剤等として有効に使用されている
が、生石灰粉は吸湿性を有するため、そのままでは吸湿
して流動性がなくなるので取り扱いに不便を生じる。BACKGROUND ART Lime powder, especially quicklime powder, has been effectively used in the manufacture of refractories, as a treatment agent for valves and paper, as a desulfurizing agent, etc. However, since quicklime powder has hygroscopic properties, it cannot be used as it is. This causes inconvenience in handling as it loses fluidity.
このために従来、生石灰等の石灰粉の流動性を改善する
方法として、石灰粉をメチルハイドロジエンポリシロキ
サン、末端ト・リメチルジメチルシロキサン、末端水酸
基ジメチルシロキサン、末端トリメチルシロキシメチル
メトキシポリシロキサン等で処理する方法が提案されて
いる(特開昭55−47223号、特開昭58−120
519号、特公昭57−7085号、特公昭5757−
7O87゜
しかしながら、メチルハイドロジエンポリシロキサンを
石灰粉の流動性改善剤として用いる方法は、処理が進む
に従い水素ガスが発生し、爆発の危険性が生じる。例え
ば、石灰粉100牙をで示されるメチルハイドロジエン
ポリシロキサン0.1’)で処理すると、最大361!
の水素ガスが発生する。従って、石灰粉を容器内で処理
したり処理品を貯蔵する場合、水素ガスの爆発V!四囲
外するため、不活性ガスや不燃性溶剤(塩素化溶剤等)
で希釈したり、容器の開口部を大きくする必要があるが
、希釈処理を行なうことは煩雑である上、特に不燃性溶
剤で希釈した場合には後工程で溶剤を除去しなければな
らない面倒がある。また、容器の開口部を大きくした場
合、処理が進んで石灰粉の流VJ性が増大すると粉体が
飛散するおそれが生じる。To this end, as a method to improve the fluidity of lime powder such as quicklime, lime powder has been treated with methylhydrodiene polysiloxane, trimethyldimethylsiloxane terminal, dimethylsiloxane terminal hydroxyl group, trimethylsiloxymethylmethoxypolysiloxane terminal, etc. A method of processing has been proposed (Japanese Patent Application Laid-Open Nos. 55-47223 and 1982-120).
No. 519, Special Publication No. 57-7085, Special Publication No. 5757-
7O87° However, in the method of using methylhydrodiene polysiloxane as a fluidity improver for lime powder, hydrogen gas is generated as the treatment progresses, creating a risk of explosion. For example, when 100 lime powder is treated with methylhydrogen polysiloxane (0.1'), the maximum amount is 361!
of hydrogen gas is generated. Therefore, when processing lime powder in a container or storing the processed product, hydrogen gas explosion V! To remove the surrounding area, use inert gas or nonflammable solvent (chlorinated solvent, etc.)
However, the dilution process is complicated, and especially when diluted with a nonflammable solvent, the solvent must be removed in the subsequent process. be. Furthermore, if the opening of the container is made large, there is a risk that the powder will scatter as the treatment progresses and the flowability of the lime powder increases.
また、末端トリメチルシリル又は末※i;水Muジメチ
ルポリシ0キサンを流動性改善剤とした場合は、長時間
の処理時間を要し、流動性改善効果が充用するまでにか
なりの時間を必要とする上、強力な撹拌処理を行なわな
ければならず、処理性に問題がある。In addition, when terminal trimethylsilyl or terminal *i; water Mu dimethyl polysiloxane is used as a fluidity improver, a long processing time is required, and a considerable amount of time is required until the fluidity improvement effect is fully realized. Moreover, strong stirring treatment is required, which poses a problem in processability.
更に、末端トリメチルシリルメチルメトキシポリシロキ
サンを用いる方法は、この化合物自体を製造するのが複
雑で、コストが高価なものになる。Moreover, the process using terminal trimethylsilylmethylmethoxypolysiloxanes makes the compound itself complicated to produce and expensive.
11へ」」
本発明者らは、上記事情に鑑み、安全に作業でき、しか
も作業性の良好な石灰粉の流動性改善方法につき鋭意検
討を行なった結果、下記一般式%式%
(但し、RL 、R2、R’はそれぞれ互に同種もしく
は異種の一画炭化水素基、J=0〜35モル%、m=3
5〜95モル%、n=5〜30モル%。11.'' In view of the above circumstances, the present inventors have conducted intensive studies on a method for improving the fluidity of lime powder that is safe to work with and has good workability.As a result, the following general formula % formula % (However, RL, R2, and R' are the same or different single-stroke hydrocarbon groups, J = 0 to 35 mol%, m = 3
5-95 mol%, n=5-30 mol%.
J+n++n=100モル%である)で示されるオルガ
ノポリシロキサンが石灰粉流動性改善剤として優れた特
性を有し、この種の化合物を石灰粉100部(il1部
、以下同シ)ニ対し1”0.02〜1部の割合で用いて
処理を行なうことにより、上記目的を達成し得ることを
知見した。The organopolysiloxane represented by J+n++n=100 mol% has excellent properties as a lime powder fluidity improver. It has been found that the above object can be achieved by carrying out the treatment using 0.02 to 1 part.
即ち、上記のようなR”;LO土単位を5〜30モル%
含む化合物を用いて石灰粉の処理を行なった場合、水素
ガスの発生がなく、またメチルアルコールのような可燃
性ガスの発生も少ないので、安全に作業でき、しかもこ
のように水素ガスの発生がなく、メチルアルコールの発
生が少ないため、不活性ガスや不燃性溶剤で希釈する必
要がない上、室温で作業でき、必ずしも強い撹拌を行な
わなくてもよく、更に石灰粉に対し微量の使用でかつ比
較的短時間で流動性改善効果を付与することができるな
ど、作業性が良好で簡単かつ確実に石灰粉の流動性を改
善し冑、また上記化合物は比較的簡単に製造できて安価
であるため、処理費を低減し得ることを知見し、本発明
をなすに至ったものである。That is, 5 to 30 mol% of R''; LO soil units as described above.
When lime powder is treated using a compound containing it, there is no generation of hydrogen gas, and there is little generation of flammable gases such as methyl alcohol, so the work can be done safely. Since there is little methyl alcohol generation, there is no need to dilute with inert gas or non-flammable solvents, work can be done at room temperature, strong stirring is not necessarily required, and it can be used in small amounts for lime powder. It has good workability and can easily and reliably improve the fluidity of lime powder, such as being able to impart a fluidity-improving effect in a relatively short time, and the above compound is relatively easy to produce and is inexpensive. Therefore, the present invention was realized based on the finding that the processing cost can be reduced.
以下、本発明につき更に詳しく説明する。The present invention will be explained in more detail below.
11へ」1
本発明の石灰粉流動性改善方法は、生石灰、消石灰、炭
酸カルシウム等の石灰粉、特に100メツシユより細か
い粒度の石灰粉の流動性を改善するのに好適に採用し得
、これらの石灰粉を下記一般式(I)
(R; Sl+)λ(1,s;ox)、(R1si’0
.H)、・・・(、T)
(但し、R1、R2、R3はそれぞれ互に同種もしくは
異種の一価炭化水素基、!=0〜35Tl−ル%、m=
35〜95モル%、n=5〜30モル%。11.1 The method for improving the fluidity of lime powder of the present invention can be suitably employed to improve the fluidity of lime powder such as quicklime, slaked lime, calcium carbonate, etc., especially lime powder with a particle size finer than 100 mesh. Lime powder of the following general formula (I) (R; Sl +) λ (1, s; ox), (R1si'0
.. H), ... (, T) (However, R1, R2, R3 are mutually the same or different monovalent hydrocarbon groups, !=0 to 35 Tl-le%, m=
35-95 mol%, n=5-30 mol%.
J+m +n =100モル%である)で示されるオル
ガノポリシロキサンの1種又は2種以上で処理すること
を特徴とするものである。It is characterized by being treated with one or more organopolysiloxanes represented by J + m + n = 100 mol %).
ここで、(I)式のオルガノポリシロキサンとしてtま
、R1、R2及びR3がそれぞれメチル基、エチル具等
の低級アルキル基であるものが好適に使用される。特に
、R1、R2、R3がそれぞれメチル燵であり、!=2
〜35モル%、 m =4Q〜93モル%、n=5〜2
5モル%であるメチルポリシロキサンが好ましく用いら
れる。この場合、上記(I)式において、R3SgO上
単酸単位ずしも必要としないが、重合度調整のために導
入され、そのモル%は上述したように35モル%以下、
特に2〜35モル%であることが好ましい。また、R1
5iO±単位は石灰粉を処理する場合の流動性改善効果
の発現を早くするために必要であり、そのモル%は5〜
30モル%、特に好ましくは上述したように5〜25モ
ル%とするもので、5モル?もより少ないと流動性改善
効果の発現が遅くなり、30モル%より多くなると安定
なポリシロキサン流体を得ることが困難となり、好まし
くない。Here, as the organopolysiloxane of formula (I), one in which R1, R2 and R3 are each a lower alkyl group such as a methyl group or ethyl group is preferably used. In particular, R1, R2, and R3 are each methyl katsure, and! =2
~35 mol%, m = 4Q ~ 93 mol%, n = 5-2
Methylpolysiloxane with a content of 5 mole % is preferably used. In this case, in the above formula (I), the single acid unit on R3SgO is not required, but it is introduced to adjust the degree of polymerization, and its mol% is 35 mol% or less as described above,
In particular, it is preferably 2 to 35 mol%. Also, R1
5 iO± units are necessary to accelerate the onset of fluidity improvement effect when processing lime powder, and its mol% is 5 to 5 iO units.
30 mol%, particularly preferably 5 to 25 mol% as mentioned above, 5 mol? If it is less than 30 mol %, the fluidity improvement effect will be delayed, and if it is more than 30 mol %, it will be difficult to obtain a stable polysiloxane fluid, which is not preferable.
また、上記化合物としては、25℃の粘度が1〜500
cs、特に1〜100csであるものが好ましい。In addition, the above compound has a viscosity of 1 to 500 at 25°C.
cs, especially 1 to 100 cs is preferred.
なお、上記(1)式のオルガノポリシロキサンは公知の
方法で製造し得、一般には、それぞれ相当する加水分解
性基(塩素等)を有するシラン類の共加水分解法(必要
に応じてトルエン等の溶媒を使用し得る)によって’I
ll 5Wされる。このため、ポリシロキサン流体は一
般に製造上から数%以下の水M1基又はアルコキシ基を
含有するものとして得られる。またこの場合粘度調整の
ため活性白土、硫酸等の触媒を用いて重合する方法も採
用し得る。The organopolysiloxane of the above formula (1) can be produced by a known method, and is generally a co-hydrolysis method of silanes having corresponding hydrolyzable groups (chlorine, etc.) (if necessary, toluene etc.) solvents may be used)
ll 5W is done. For this reason, polysiloxane fluids are generally produced containing several percent or less of water M1 groups or alkoxy groups. In this case, a method of polymerization using a catalyst such as activated clay or sulfuric acid may also be employed to adjust the viscosity.
本発明は上記(I)式のオルガノポリシロキサンを用い
て石灰粉を処理するものであるが、この場合上記化合物
の使用量は石灰粉100部に対し0.02〜1部とする
ものであり、使用量が0.02部より少ない場合及び1
部より多い場合のいずれも石灰粉流動性改善効果が十分
梵揮されない。なお、上記化合物の好適な使用量範囲は
石灰粉100部に対し0.1〜0.5部である。In the present invention, lime powder is treated using the organopolysiloxane of formula (I), and in this case, the amount of the compound used is 0.02 to 1 part per 100 parts of lime powder. , when the amount used is less than 0.02 part and 1
In either case, the lime powder fluidity improving effect is not sufficiently exerted. In addition, the suitable usage-amount range of the said compound is 0.1-0.5 part with respect to 100 parts of lime powder.
上記化合物で石灰粉を処理する方法としては、通常採用
されている方法を用いることができ、例えば石灰粉に上
記化合物を添加し、振盪撹拌等の適宜なFft#法を使
用して石灰粉に上記化合物を均一に混合する方法が採用
し得る。この場合、撹拌は必ずしも強撹拌でなくてもよ
い。処理温度は特に制限されず、室温〜100℃とする
ことができるが、室温で十分処理でき、本発明によれば
雰囲気温度で混合処理することにより流動性の高い石灰
粉を確実に(りることができる。また、処理時間も限定
されないが、通常10分〜1時間であり、本発明によれ
ば比較的短時間の処理で石灰粉の流動性を改善し得る。As a method for treating lime powder with the above-mentioned compound, a commonly adopted method can be used. For example, the above-mentioned compound is added to lime powder, and the lime powder is processed using an appropriate Fft# method such as shaking and stirring. A method of uniformly mixing the above compounds can be adopted. In this case, stirring does not necessarily have to be strong stirring. The treatment temperature is not particularly limited and can be from room temperature to 100°C, but the treatment can be carried out sufficiently at room temperature, and according to the present invention, highly fluid lime powder can be reliably produced by mixing at ambient temperature. Further, although the treatment time is not limited, it is usually 10 minutes to 1 hour, and according to the present invention, the fluidity of lime powder can be improved with a relatively short treatment time.
なお、本発明においては、水素ガスは発生せず、メチル
アルコール発生量も非常に少ないため、不活性ガスや不
燃性ガスで希釈する必要はなく、空気雰囲気下で処理を
行なうことができ、無溶剤状態で処理し得る。In addition, in the present invention, since hydrogen gas is not generated and the amount of methyl alcohol generated is very small, there is no need to dilute with inert gas or nonflammable gas, and the treatment can be carried out in an air atmosphere. Can be processed in solvent.
発明の効果
以上)小べたように、本発明の石灰粉流動性改善方法は
特定のオルガノポリシロキサンを特定量使用したことに
より、水素の発生をなくし、かつメチルアルコールの発
生を少なくして安全に処理を行なうことができ、かつ全
潰において比較的短時間で処理し得る上、微量の処理剤
を用いるだけで十分高い流動性を有する石灰粉を確実に
得ることができ、しかもコスト的にも安価である。Effects of the invention) As mentioned above, the method for improving the fluidity of lime powder of the present invention uses a specific amount of a specific organopolysiloxane, thereby eliminating the generation of hydrogen and reducing the generation of methyl alcohol, making it safe. It can be processed in a relatively short time when completely crushed, and it is possible to reliably obtain lime powder with sufficiently high fluidity by using only a small amount of processing agent, and it is also inexpensive in terms of cost. It is.
以下、実施例と比較例を示し、本発明を具体的に説明す
るが、本発明は下記の実施例に制限されるものではない
。EXAMPLES Hereinafter, the present invention will be specifically explained by showing examples and comparative examples, but the present invention is not limited to the following examples.
[実施例、比較例]
(CH3) s 5=CI、 (CH3) 2 sa
c第2゜CH35LCj 3をそれぞれ第1表に示す割
合で使用し、常法に従って加水分解を行なってメチルポ
リシロキサンを得た。[Examples, Comparative Examples] (CH3) s 5=CI, (CH3) 2 sa
C2°CH35LCj 3 was used in the proportions shown in Table 1, and hydrolysis was carried out according to a conventional method to obtain methylpolysiloxane.
第1表
次に、200メツシユバス(250メツシユバス8%、
325メツシュバス40%)の生石灰100部に上記メ
チルポリシロキサンをそれぞれ0.1部及び0.3部添
加し、これを攪拌器付き300CC丸底フラスコに入れ
、室温で1時間混合撹痒処理を行なった。Table 1 Next, 200 mesh buses (250 mesh buses 8%,
0.1 part and 0.3 parts of the above-mentioned methylpolysiloxane were added to 100 parts of quicklime in a 325 mesh bath (40%), placed in a 300CC round bottom flask equipped with a stirrer, and mixed and stirred for 1 hour at room temperature. Ta.
比較のため、25℃における粘度が20C3の末端トリ
メチルシリル基ジメチルシロキサン(比較例1)及び2
5℃の粘度が20C3の末端水酸基含有ジメチルシロキ
サン(比較例2)を用いて同様の処理を行なった。For comparison, dimethylsiloxane with a terminal trimethylsilyl group having a viscosity of 20C3 at 25°C (Comparative Example 1) and 2
A similar treatment was carried out using terminal hydroxyl group-containing dimethylsiloxane (Comparative Example 2) having a viscosity of 20C3 at 5°C.
以上の方法で処理された生石灰の安息角を測定し、流動
性を評価した。結果を第2表に示す。なお、未処理の生
石灰の安息角は53°であった。The angle of repose of the quicklime treated using the above method was measured to evaluate its fluidity. The results are shown in Table 2. Note that the angle of repose of untreated quicklime was 53°.
第2表
第2表の結果より、本梵明のオルガノポリシロキサンを
用いることによって短時間で生石灰粉の流動性を改善し
得ることが知見された。From the results shown in Table 2, it was found that the fluidity of quicklime powder could be improved in a short time by using the present Bonmei organopolysiloxane.
Claims (1)
iO_2_/_2)_m(R^1SiO_3_/_2)
_n・・・( I ) (但し、R^1、R^2、R^3はそれぞれ互に同種も
しくは異種の一価炭化水素基、l=0〜35モル%、m
=35〜95モル%、n=5〜30モル%、l+m+n
=100モル%である)で示されるオルガノポリシロキ
サン0.02〜1重量部を用いて石灰粉100重量部を
処理することを特徴とする石灰粉の流動性改善方法。 2、一般式( I )の化合物としてR^1、R^2、R
^3がそれぞれメチル基であり、l=2〜35モル%、
m=40〜93モル%、n=5〜25モル%であるメチ
ルポリシロキサン流体を用いた特許請求の範囲第1項記
載の方法。 3、100メッシュより細かい石灰粉に一般式( I )
の化合物を無溶剤状態で添加し、室温〜100℃で混合
撹拌することにより処理を行なうようにした特許請求の
範囲第1項又は第2項記載の方法。[Claims] 1. The following general formula (I) (R^3_3SiO_1_/_2)_l(R^2_2S
iO_2_/_2)_m(R^1SiO_3_/_2)
_n...(I) (However, R^1, R^2, R^3 are the same or different monovalent hydrocarbon groups, l = 0 to 35 mol%, m
=35-95 mol%, n=5-30 mol%, l+m+n
1. A method for improving the fluidity of lime powder, which comprises treating 100 parts by weight of lime powder with 0.02 to 1 part by weight of an organopolysiloxane represented by the formula (=100 mol%). 2. R^1, R^2, R as a compound of general formula (I)
^3 is each a methyl group, l = 2 to 35 mol%,
The method of claim 1 using a methylpolysiloxane fluid in which m=40-93 mol% and n=5-25 mol%. 3. General formula (I) for lime powder finer than 100 mesh
The method according to claim 1 or 2, wherein the treatment is carried out by adding the compound in a solvent-free state and mixing and stirring at room temperature to 100°C.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18399584A JPS6163528A (en) | 1984-09-03 | 1984-09-03 | Method for improving fluidity of lime powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18399584A JPS6163528A (en) | 1984-09-03 | 1984-09-03 | Method for improving fluidity of lime powder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6163528A true JPS6163528A (en) | 1986-04-01 |
JPS6365607B2 JPS6365607B2 (en) | 1988-12-16 |
Family
ID=16145476
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18399584A Granted JPS6163528A (en) | 1984-09-03 | 1984-09-03 | Method for improving fluidity of lime powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6163528A (en) |
Cited By (2)
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WO2014109330A1 (en) * | 2013-01-10 | 2014-07-17 | 宇部マテリアルズ株式会社 | Water absorbent and method for producing same |
US10386969B1 (en) | 2008-09-26 | 2019-08-20 | Cypress Semiconductor Corporation | System and method to measure capacitance of capacitive sensor array |
-
1984
- 1984-09-03 JP JP18399584A patent/JPS6163528A/en active Granted
Cited By (4)
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---|---|---|---|---|
US10386969B1 (en) | 2008-09-26 | 2019-08-20 | Cypress Semiconductor Corporation | System and method to measure capacitance of capacitive sensor array |
US11029795B2 (en) | 2008-09-26 | 2021-06-08 | Cypress Semiconductor Corporation | System and method to measure capacitance of capacitive sensor array |
WO2014109330A1 (en) * | 2013-01-10 | 2014-07-17 | 宇部マテリアルズ株式会社 | Water absorbent and method for producing same |
JP2014147927A (en) * | 2013-01-10 | 2014-08-21 | Ube Material Industries Ltd | Moisture adsorbent and method for producing the same |
Also Published As
Publication number | Publication date |
---|---|
JPS6365607B2 (en) | 1988-12-16 |
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