JP3772334B2 - Calcium hypochlorite composition tablets with controlled solubility - Google Patents
Calcium hypochlorite composition tablets with controlled solubility Download PDFInfo
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- JP3772334B2 JP3772334B2 JP35387495A JP35387495A JP3772334B2 JP 3772334 B2 JP3772334 B2 JP 3772334B2 JP 35387495 A JP35387495 A JP 35387495A JP 35387495 A JP35387495 A JP 35387495A JP 3772334 B2 JP3772334 B2 JP 3772334B2
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- Prior art keywords
- calcium hypochlorite
- calcium
- hypochlorite composition
- weight
- tablet
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Description
【０００１】
【発明の属する技術分野】
本発明は、溶解性を制御した次亜塩素酸カルシウム組成物錠剤に関するものである。
【０００２】
【従来技術】
晒粉錠剤は強力な酸化剤と取り扱いの容易さから、プール，上下水道，浄化槽、排水の殺菌消毒や、食品・パルプ・繊維の漂白に用いられている。そのうち無機系晒粉は次亜塩素酸カルシウム組成物を主成分としており、有効塩素を通常７０％以上含有する。さらに最近では、次亜塩素酸カルシウム組成物製品も安全性を求められるため、高含水品（水分を１０％以上含有する）が流通するようになった。流通している形状としては顆粒剤と錠剤の２種類がある。このうち顆粒剤は速効性を求められる場合に用いられ、錠剤は滅菌器，殺菌筒などに充填され、継続的に使用される。そのため、顆粒剤では速溶性が、錠剤では遅溶性が求められる。
【０００３】
晒粉錠剤は、上記用途からも遅溶性であることが望ましく、溶解速度が速いと滅菌器，殺菌筒への供給回数が増加し、利便性が低下する。特に大型合併処理浄化槽やコミプラでは、処理水量が多く、溶解速度がかなり遅いものが求められていた。
【０００４】
特公昭４４−１０１９７号には、乾燥造粒された次亜塩素酸カルシウム組成物に、消石灰または塩基性塩法で得られたＣａ（ＣｌＯ）2 ６３．８％，Ｃａ（ＯＨ）2 ２１．２％，ＣａＣｌ2 ７．３％その他からなる水酸化カルシウムを多量に含む塩基性次亜塩素酸カルシウムを混合打錠する方法が開示されており、特開昭５５−９０４０４号には塩化カルシウムと消石灰を混合打錠する方法が示されている。しかし、この方法では、５％程度以上の添加量が必要であり有効塩素量の実質的な低下を招き、なおかつ石灰分のみが溶け残り残渣となりやすい欠点があった。
また、特公平６−２４９６１号には、４フッ化エチレンポリマー（商品名テフロン）の微粒子を混合打錠する方法が記載されているが、この４フッ化エチレンポリマーは高価であり、生分解性が全くないといった欠点もある。
【０００５】
【発明が解決しようとする課題】
有効塩素量の低下がなく、溶解が崩壊せず均一でありかつ遅溶化された次亜塩素酸カルシウム組成物錠剤を得ることを目的とする。
【０００６】
【課題を解決するための手段】
本発明は、ステアリン酸カルシウムを０．０１〜５．０重量％含有することを特徴とする次亜塩素酸カルシウム組成物錠剤であり、特に次亜塩素酸カルシウム組成物の含水量が５〜２０重量％である錠剤である。
【０００７】
【発明の実施の形態】
含有するステアリン酸カルシウムは０．０１〜５．０重量％である。０．０１重量％より小さいと錠剤の遅溶化効果はなく、５．０重量％より大きい場合は遅溶化効果はあるが錠剤の有効塩素の低下が問題となってくる。錠剤の組成によって含有するステアリン酸カルシウムの量は適宜選択できるが、好ましい含有量は０．１〜３．０重量％であり、特に好ましいのは０．２〜１．０重量％である。
【０００８】
ステアリン酸カルシウムは錠剤中に含有されていればよく、その添加方法は種々な方法がとれる。操作的に次亜塩素酸カルシウム組成物錠剤を製造する際、原料顆粒品にステアリン酸カルシウムを混合し、打錠するのが便利である。
【０００９】
本錠剤は、次亜塩素酸カルシウム組成物を主成分とするものであり、次亜塩素酸カルシウムの含有量は特に規定はされないが通常６０重量％以上であり、特に有効塩素を通常７０重量％以上含有ものに好適である。
また、次亜塩素酸カルシウム組成物の水分は無水であっても含水のものであってもよいが、５〜２０重量％の高含水品の遅溶化に有効である。
【００１０】
【実施例】
以下、本発明の実施例を示すが、本発明はこれらに限定されるものではない。
【００１１】
実施例
反応：
純度換算で１４５ｋｇの苛性ソーダと水１６００ｋｇとからなる水溶液を、２０℃に保ちながら塩素ガスおよそ１３０ｋｇを導入して塩素化を行った。析出した食塩を分級によりのぞき、消石灰１５０ｋｇ及び水１００ｋｇを加えミキサーで乳化し、次亜石灰乳液とした。これを２５℃で保ちながら、再び塩素ガス１３０ｋｇを通じ塩素化を行った。析出した食塩結晶を重量分級で除いた。得られた次亜塩素酸カルシウム組成物スラリーの組成は、次亜塩素酸カルシウム１７．９％，塩化ナトリウム１８．３％，塩化カルシウム０．９％，水酸化カルシウム０．８％を含んでいた。
濾過・乾燥・造粒・打錠：
この次亜塩素酸カルシウム組成物スラリーを、遠心分離器にて濾過し、母液と次亜塩素酸カルシウム組成物ケーキとに分離した。このケーキを乾燥・造粒し、ステアリン酸カルシウム0.2％および0.5％混合し、打錠・成型して次亜塩素酸カルシウム組成物２０ｇ錠剤製品を得る。この製品の組成は、0.2％混合品が次亜塩素酸カルシウム７２．１％，塩化ナトリウム７．８％，塩化カルシウム１．５％，水酸化カルシウム４．５％，水分その他約１４％であり、0.5％混合品が次亜塩素酸カルシウム７２.０％，塩化ナトリウム７．８％，塩化カルシウム１．５％，水酸化カルシウム４．４％，水分その他約１４％であった。
【００１２】
比較例
実施例において、ステアリン酸カルシウムを混合しなかった以外は同様に処理して次亜塩素酸カルシウム組成物（２０ｇ錠剤）を得た。この製品の組成は、次亜塩素酸カルシウム７２．４％，水分１４％と実施例と実質的に差はなかった。
【００１３】
試験例（溶解速度の測定）
３Ｌの蒸留水を入れた５Ｌの広口ビーカーを、３０℃の恒温槽に入れ、あらかじめ正確に重量を測定した試料（２０ｇ錠剤）４個をビーカー内の決められた場所に置き、羽根付き攪拌機で攪拌した。攪拌速度は100rpmに調整した。１時間溶解後、攪拌を止め錠剤を取り出し、実験用ワイパー紙で軽く水分をふき取った。溶解試験前後の重量差から、溶解量を求め、これを溶解速度とした。これを５回繰り返し、計２０個の錠剤について平均溶解速度を求めた。
実施例および比較例で得られた製品（２０ｇ錠剤）につき、溶解速度を比較した。
結果は以下の通りであった。
【００１４】
【表１】
【発明の効果】
錠剤の有効塩素を実質的に低下させることなく、溶解速度を遅溶化することができ、しかも崩壊せず均一に溶解する次亜塩素酸カルシウム組成物錠剤を提供することができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a calcium hypochlorite composition tablet with controlled solubility.
[0002]
[Prior art]
Bleached tablets are a powerful oxidizer and are easy to handle. They are used for disinfection and disinfection of pools, water and sewage systems, septic tanks, wastewater, and bleaching of food, pulp and fibers. Among them, the inorganic bleaching powder contains a calcium hypochlorite composition as a main component and usually contains 70% or more of effective chlorine. More recently, since calcium hypochlorite composition products are also required to be safe, products with high water content (containing 10% or more water) have come into circulation. There are two types of shapes in circulation: granules and tablets. Of these, granules are used when quick action is required, and tablets are filled in sterilizers, sterilization tubes, etc. and used continuously. Therefore, fast solubility is required for granules, and slow solubility is required for tablets.
[0003]
Bleached tablets are desirably slow-soluble from the above-mentioned applications. When the dissolution rate is high, the number of times of supply to the sterilizer and sterilization cylinder increases, and convenience decreases. In particular, large-scale merged septic tanks and comiplas have been required to have a large amount of treated water and a very slow dissolution rate.
[0004]
In Japanese Examined Patent Publication No. 44-10197, dry-granulated calcium hypochlorite composition is obtained by adding 63.8% of Ca (ClO) 2 obtained by slaked lime or basic salt method, and Ca (OH) 2 21. A method of mixing and compressing basic calcium hypochlorite containing 2%, CaCl 2 7.3%, etc. and containing a large amount of calcium hydroxide is disclosed, and Japanese Patent Application Laid-Open No. 55-90404 discloses calcium chloride and A method of tableting mixed slaked lime is shown. However, this method requires an addition amount of about 5% or more, which causes a substantial decrease in the amount of effective chlorine, and has a drawback that only the lime content is easily dissolved and becomes a residue.
Japanese Patent Publication No. 6-24961 describes a method of mixing and tableting fine particles of a tetrafluoroethylene polymer (trade name Teflon). This tetrafluoroethylene polymer is expensive and biodegradable. There is also a drawback that there is no.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to obtain a calcium hypochlorite composition tablet in which the amount of effective chlorine does not decrease, the dissolution does not collapse, is uniform, and is slowly dissolved.
[0006]
[Means for Solving the Problems]
The present invention relates to a calcium hypochlorite composition tablet containing 0.01 to 5.0% by weight of calcium stearate, and in particular, the water content of the calcium hypochlorite composition is 5 to 20% by weight. % Tablets.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The calcium stearate contained is 0.01 to 5.0% by weight. If it is less than 0.01% by weight, there is no effect of slow-dissolving the tablet. If it is more than 5.0% by weight, there is a slow-dissolving effect, but a decrease in the effective chlorine of the tablet becomes a problem. The amount of calcium stearate contained depending on the composition of the tablet can be appropriately selected, but the preferred content is 0.1 to 3.0% by weight, and particularly preferred is 0.2 to 1.0% by weight.
[0008]
Calcium stearate may be contained in the tablet, and various methods can be used for the addition. When manufacturing a calcium hypochlorite composition tablet in terms of operation, it is convenient to mix calcium stearate into the raw granule and tablet.
[0009]
This tablet is mainly composed of a calcium hypochlorite composition, and the content of calcium hypochlorite is not particularly specified but is usually 60% by weight or more, and particularly effective chlorine is usually 70% by weight. It is suitable for the above contents.
Moreover, although the water content of the calcium hypochlorite composition may be anhydrous or water-containing, it is effective for slow dissolution of a high-water content product of 5 to 20% by weight.
[0010]
【Example】
Examples of the present invention will be described below, but the present invention is not limited thereto.
[0011]
Example reaction:
Chlorination was performed by introducing about 130 kg of chlorine gas while maintaining an aqueous solution composed of 145 kg of caustic soda and 1600 kg of water in terms of purity at 20 ° C. The precipitated salt was removed by classification, 150 kg of slaked lime and 100 kg of water were added, and the mixture was emulsified with a mixer to obtain a hypolime milk emulsion. While maintaining this at 25 ° C., chlorination was again conducted through 130 kg of chlorine gas. Precipitated salt crystals were removed by weight classification. The composition of the resulting calcium hypochlorite composition slurry contained 17.9% calcium hypochlorite, 18.3% sodium chloride, 0.9% calcium chloride, and 0.8% calcium hydroxide. .
Filtration, drying, granulation, tableting:
This calcium hypochlorite composition slurry was filtered with a centrifuge and separated into a mother liquor and a calcium hypochlorite composition cake. This cake is dried and granulated, mixed with 0.2% and 0.5% calcium stearate, and tableted and molded to obtain a 20 g tablet product of calcium hypochlorite composition. The composition of this product is as follows: 0.2% mixed product is calcium hypochlorite 72.1%, sodium chloride 7.8%, calcium chloride 1.5%, calcium hydroxide 4.5%, moisture and other 14% The 0.5% mixed product was 72.0% calcium hypochlorite, 7.8% sodium chloride, 1.5% calcium chloride, 4.4% calcium hydroxide, and about 14% moisture.
[0012]
In the comparative example, a calcium hypochlorite composition (20 g tablet) was obtained in the same manner except that calcium stearate was not mixed. The composition of this product was 72.4% calcium hypochlorite and 14% moisture, which was not substantially different from the examples.
[0013]
Test example (measurement of dissolution rate)
Place a 5L wide-mouth beaker containing 3L of distilled water in a thermostatic chamber at 30 ° C, and place 4 samples (20g tablets) accurately weighed in advance in a designated place in the beaker. Stir. The stirring speed was adjusted to 100 rpm. After dissolution for 1 hour, the stirring was stopped and the tablets were taken out, and the moisture was gently wiped off with a laboratory wiper paper. The amount of dissolution was determined from the weight difference before and after the dissolution test, and this was used as the dissolution rate. This was repeated 5 times, and the average dissolution rate was determined for a total of 20 tablets.
The dissolution rates of the products (20 g tablets) obtained in the examples and comparative examples were compared.
The results were as follows.
[0014]
[Table 1]
【The invention's effect】
It is possible to provide a calcium hypochlorite composition tablet capable of slow dissolving the dissolution rate without substantially reducing the effective chlorine of the tablet and dissolving uniformly without disintegrating.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35387495A JP3772334B2 (en) | 1995-12-29 | 1995-12-29 | Calcium hypochlorite composition tablets with controlled solubility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35387495A JP3772334B2 (en) | 1995-12-29 | 1995-12-29 | Calcium hypochlorite composition tablets with controlled solubility |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09188503A JPH09188503A (en) | 1997-07-22 |
| JP3772334B2 true JP3772334B2 (en) | 2006-05-10 |
Family
ID=18433811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35387495A Expired - Fee Related JP3772334B2 (en) | 1995-12-29 | 1995-12-29 | Calcium hypochlorite composition tablets with controlled solubility |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3772334B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5207161B2 (en) * | 2006-08-10 | 2013-06-12 | ディバーシー株式会社 | Method of supplying detergent to automatic dishwasher, tablet detergent composition for automatic dishwasher used therein, and washing method using the same |
| WO2011062202A1 (en) * | 2009-11-19 | 2011-05-26 | 日本曹達株式会社 | Reduction treatment method for ballast water |
-
1995
- 1995-12-29 JP JP35387495A patent/JP3772334B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09188503A (en) | 1997-07-22 |
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