JPH0380987A - Chlorine smell removing matter - Google Patents
Chlorine smell removing matterInfo
- Publication number
- JPH0380987A JPH0380987A JP21574189A JP21574189A JPH0380987A JP H0380987 A JPH0380987 A JP H0380987A JP 21574189 A JP21574189 A JP 21574189A JP 21574189 A JP21574189 A JP 21574189A JP H0380987 A JPH0380987 A JP H0380987A
- Authority
- JP
- Japan
- Prior art keywords
- chitosan
- fibrous
- chlorine odor
- acetic acid
- chlorine
- 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.)
- Granted
Links
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 229910052801 chlorine Inorganic materials 0.000 title claims abstract description 45
- 239000000460 chlorine Substances 0.000 title claims abstract description 45
- 229920001661 Chitosan Polymers 0.000 claims abstract description 48
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000000835 fiber Substances 0.000 claims abstract description 13
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 5
- 230000006196 deacetylation Effects 0.000 claims description 8
- 238000003381 deacetylation reaction Methods 0.000 claims description 8
- 239000008399 tap water Substances 0.000 abstract description 11
- 235000020679 tap water Nutrition 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 8
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 3
- 238000009987 spinning Methods 0.000 abstract description 3
- 239000003513 alkali Substances 0.000 abstract 2
- 229920001131 Pulp (paper) Polymers 0.000 abstract 1
- 235000019645 odor Nutrition 0.000 description 36
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 239000000243 solution Substances 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 7
- 239000000123 paper Substances 0.000 description 7
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 6
- 241000209219 Hordeum Species 0.000 description 6
- 235000007340 Hordeum vulgare Nutrition 0.000 description 6
- 244000269722 Thea sinensis Species 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000796 flavoring agent Substances 0.000 description 4
- 235000019634 flavors Nutrition 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000001953 sensory effect Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- NUIURNJTPRWVAP-UHFFFAOYSA-N 3,3'-Dimethylbenzidine Chemical compound C1=C(N)C(C)=CC(C=2C=C(C)C(N)=CC=2)=C1 NUIURNJTPRWVAP-UHFFFAOYSA-N 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 238000004737 colorimetric analysis Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000779 poly(divinylbenzene) Polymers 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は水道水などと短時間接触させることによって、
水道水などに含まれる塩素臭を強力かつ選択的に除去す
ることができる塩素臭除去剤に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention enables
This invention relates to a chlorine odor remover that can powerfully and selectively remove chlorine odor contained in tap water and the like.
〔従来の技術及び発明が解決しようとする課題〕従来、
水道水中の塩素臭の除去に活性炭が利用されている。活
性炭は水道水を接触させることによって容易に水道水中
の塩素臭を吸着除去することができる。活性炭は多くの
微細孔を有し、この微細孔内で塩素臭を吸着除去してい
ると考えられる。しかしながら、活性炭粒子内部に閉じ
込められた微細孔は有効に働かないため効果的に塩素臭
を取り除くためには、多量の活性炭を必要とした。それ
に加えて、活性炭による吸着は主に物理吸着であるため
塩素臭のみを吸着するといった選択性がなく、飲料水に
好ましい風味を与えている物質までも除去してしまう。[Problems to be solved by conventional techniques and inventions] Conventionally,
Activated carbon is used to remove chlorine odor from tap water. Activated carbon can easily adsorb and remove chlorine odor in tap water by contacting it with tap water. Activated carbon has many micropores, and it is thought that chlorine odor is adsorbed and removed within these micropores. However, since the micropores trapped inside the activated carbon particles do not work effectively, a large amount of activated carbon is required to effectively remove the chlorine odor. In addition, since the adsorption by activated carbon is mainly physical adsorption, it does not have the selectivity of adsorbing only chlorine odor, and even substances that give drinking water a pleasant flavor are removed.
従って、水道水中の塩素臭のみを効果的に除去する除去
剤が望まれている。また、活性炭自体の強度上の問題か
ら、処理水中への微粉の流出等の問題もあり、これらの
問題点を解消した除去剤が望まれている。Therefore, there is a need for a removal agent that effectively removes only the chlorine odor in tap water. Additionally, there are problems with the strength of activated carbon itself, such as the outflow of fine powder into the treated water, and a removal agent that solves these problems is desired.
一方、特開昭６０−２２５６８８号公報には繊維状のキ
トサンを濾材とした浄水器が水道水中のトリハロメタン
系物質を除去することが記載されている。また、特開昭
６１−２９１０３８号公報には脱アセチル化度８０％の
粒状のキトサンを濾材とした浄水器が水道水中の塩素を
除去することなく、重金属及び有機物のみを有効に除去
することが記載されている。しかしながらこれらの技術
には塩素臭のみを選択的に除去する効果は記載されてい
ない。On the other hand, JP-A-60-225688 describes that a water purifier using fibrous chitosan as a filter material removes trihalomethane-based substances from tap water. Additionally, JP-A-61-291038 discloses that a water purifier using granular chitosan with a degree of deacetylation of 80% as a filter material can effectively remove only heavy metals and organic substances without removing chlorine from tap water. Are listed. However, these techniques do not describe the effect of selectively removing only chlorine odor.
本発明者は、上記の問題を解決すべく鋭意検討・研究を
重ねた結果、特定の繊維状キトサンを含有する塩素臭除
去剤が先の問題を解決できることを見出し、本発明に到
達した。As a result of extensive studies and studies aimed at solving the above problems, the present inventors discovered that a chlorine odor remover containing a specific fibrous chitosan could solve the above problems, and thus arrived at the present invention.
すなわち本発明は、脱アセチル化度を６０％以上、好ま
しくは８０％以上で、かつ１％酢酸溶液に３．５重量％
溶解した時の粘度が１０００〜２５０００ｃｐｓ（３０
″Ｃ〉、好ましくは２０００〜１００００ｃｐｓ（Ｂ型
粘度計にて測定）であるキトサンを、直径５〜８０１ｍ
。That is, in the present invention, the degree of deacetylation is 60% or more, preferably 80% or more, and 3.5% by weight in a 1% acetic acid solution.
The viscosity when dissolved is 1000 to 25000 cps (30
``C>, preferably 2,000 to 10,000 cps (measured with a B-type viscometer), in a diameter of 5 to 801 m.
.
好ましくは５〜５０μｍの繊維状とした繊維状キトサン
を含む塩素臭除去剤を提供するものである。The present invention provides a chlorine odor removing agent containing fibrous chitosan preferably in the form of fibers of 5 to 50 μm.
本発明に用いられる繊維状キトサンは、水道水中のトリ
ハロメタン系物質、重金属、有機物など他の物質はほと
んど除去しないが、水道水中の塩素臭のみを選択的に除
去する。The fibrous chitosan used in the present invention hardly removes other substances such as trihalomethane-based substances, heavy metals, and organic substances in tap water, but selectively removes only the chlorine odor in tap water.
本発明者らの検討の結果、前記従来技術に用いられてい
るキトサンは、分子量を示す指標、すなわち１％酢酸溶
液に３．５重量％溶解した時の粘度が５０〜５００ｃｐ
ｓ （３０℃）と非常に低いものであり、本発明に用い
られるキトサンとは全く異なるものであることが判明し
た。As a result of studies by the present inventors, the chitosan used in the prior art has a viscosity of 50 to 500 cp, which is an indicator of molecular weight, that is, when dissolved at 3.5% by weight in a 1% acetic acid solution.
s (30°C), which is extremely low, and was found to be completely different from the chitosan used in the present invention.
本発明に用いられるキトサンは脱アセチル化度を６０％
以上、好ましくは８０％以上で、かつ１％酢酸溶液に３
．５重量％溶解した時の粘度が１０００〜２５０００ｃ
ｐｓ （３０℃）、好ましくは２０００〜１００００ｃ
ｐｓ（Ｂ型粘度計にて測定）である、キトサンの脱アセ
チル化度が６０％未満、粘度が１０００ｃｐｓ未溝の場
合、塩素臭の除去効果は非常に低い。The chitosan used in the present invention has a deacetylation degree of 60%.
or more, preferably 80% or more, and 3% in 1% acetic acid solution.
．． Viscosity when dissolved at 5% by weight is 1000-25000c
ps (30℃), preferably 2000-10000c
If the degree of deacetylation of chitosan is less than 60% and the viscosity is less than 1000 cps (measured with a B-type viscometer), the effect of removing chlorine odor is very low.
本発明に用いられる繊維状キトサンは、脱アセチル化度
が６０％以上で、かつ１％酢酸溶液に３．５重量％の割
合で溶解した時の粘度が１０００〜２５０００ｃｐｓ
（３０℃）のキトサンの酢酸溶液を調整し、ノズルから
アルカリ溶液中に射出し紡糸する方法等によって得られ
る。繊維状キトサンの直径は５〜８０１ｍ、好ましくは
５〜５０Ｉ！Ｉｍである。繊維状キトサンの直径が５−
未満では強度が充分でなく、８０ｍを越えると水との接
触効率が悪くなり塩素臭除去効果が低下してくる；
本発明の塩素臭除去剤には繊維状キトサンをそのままで
も使用することができるが、繊維状キトサン単独あるい
は他の繊維と共に乾式不織布化あるいは湿式抄紙化する
ことによって除去剤を調製する際の加工がしやすくなる
。The fibrous chitosan used in the present invention has a degree of deacetylation of 60% or more and a viscosity of 1000 to 25000 cps when dissolved in a 1% acetic acid solution at a ratio of 3.5% by weight.
It can be obtained by a method such as preparing an acetic acid solution of chitosan (at 30° C.), injecting it into an alkaline solution through a nozzle, and spinning it. The diameter of the fibrous chitosan is 5 to 801 m, preferably 5 to 50 I! Im. The diameter of fibrous chitosan is 5-
If it is less than 80 m, the strength will not be sufficient, and if it exceeds 80 m, the contact efficiency with water will deteriorate and the chlorine odor removal effect will decrease; fibrous chitosan can be used as it is in the chlorine odor removing agent of the present invention. However, by forming fibrous chitosan alone or together with other fibers into dry non-woven fabric or wet paper making, it becomes easier to process when preparing a removal agent.
繊維状キトサンを乾式不織布化あるいは湿式抄紙化する
場合、繊維状キトサンと木材バルブ繊維などの天然繊維
を９／１〜１１５の割合で用いることが望ましい。When forming fibrous chitosan into dry non-woven fabric or wet paper making, it is desirable to use fibrous chitosan and natural fibers such as wood bulb fibers in a ratio of 9/1 to 115.
上述の如く本発明に用いられる繊維状キトサンは塩素臭
除去における選択性に優れているが、塩素臭以外の臭い
を除去したいときは、本発明に用いられる繊維状キトサ
ンに活性炭素繊維やカビ臭を選択的に取り除くことので
きるポリジビニルベンゼンを併用することによってさら
なる利用上の多様化をはかることができる。As mentioned above, the fibrous chitosan used in the present invention has excellent selectivity in removing chlorine odor, but when it is desired to remove odors other than chlorine odor, activated carbon fiber or mold odor can be added to the fibrous chitosan used in the present invention. Further diversification of applications can be achieved by using polydivinylbenzene, which can selectively remove .
以下、本発明を実施例により詳細に説明するが本発明は
これらに何ら限定されない。EXAMPLES Hereinafter, the present invention will be explained in detail with reference to Examples, but the present invention is not limited thereto.
実施例１
脱アセチル化度９０％に於いてキトサン３．５重量％、
酢酸１重量％の溶液とした時の粘度が１００．４００．
２０００．８０００ｃｐｓと異なるキトサンの酢酸溶液
を調製し、それぞれを４％ＮａＯＨ水溶液中ヘノズル径
０．１６ｍｍのノズルにて射出し紡糸して繊維状キトサ
ン（単繊維径４０−）を得る。Example 1 3.5% by weight of chitosan at a degree of deacetylation of 90%,
The viscosity when made into a solution of 1% by weight of acetic acid is 100.400.
Acetic acid solutions of chitosan different from 2000 to 8000 cps are prepared, and each is injected and spun into a 4% NaOH aqueous solution using a nozzle with a nozzle diameter of 0.16 mm to obtain fibrous chitosan (single fiber diameter 40-cm).
得られた繊維状キトサンを繊維長５０ｎｕａにカットし
たもの２０ｇを第１図に示すような浄水器の濾材３とし
て用いた。第１図の浄水器は濾材充填部１、蛇口取付は
部２、繊維状キトサンからなる濾材３、及びフィルター
４，５から構威されている蛇口直結タイプの浄水器であ
る。20 g of the obtained fibrous chitosan cut into a fiber length of 50 nua was used as a filter medium 3 of a water purifier as shown in FIG. The water purifier shown in FIG. 1 is a type of water purifier that is directly connected to a faucet and consists of a filter material filling part 1, a faucet attachment part 2, a filter material 3 made of fibrous chitosan, and filters 4 and 5.
この浄水器を用いてモデル水（有効塩素濃度ｌｐｐｍ、
クロロホルム２０ｐｐｂ）２００ ｆを濾過し、その後
モデル水の塩素臭除去率、及びクロロホルム除去率を測
定した。ここで有効塩素濃度はオルトトリジン比色法に
より定量され、その値から塩素臭除去率を求めた。また
クロロホルム濃度はパージトラップを接続したガスクロ
マトグラフのＥ、Ｃ，Ｄ、検出器を用いて測定した。Using this water purifier, model water (effective chlorine concentration lppm,
After filtering 200 f of chloroform (20 ppb), the chlorine odor removal rate and chloroform removal rate of the model water were measured. Here, the effective chlorine concentration was determined by the orthotolidine colorimetric method, and the chlorine odor removal rate was determined from that value. The chloroform concentration was measured using detectors E, C, and D of a gas chromatograph connected to a purge trap.
その結果を表１に示す。The results are shown in Table 1.
表 １
本発明の繊維状キトサンは塩素臭を選択的に除去し、従
来の浄水器と使用されている繊維状キトサンと異なるこ
とが明らかである。Table 1 It is clear that the fibrous chitosan of the present invention selectively removes chlorine odor and is different from the fibrous chitosan used in conventional water purifiers.
実施例２
脱アセチル化度８５％のキトサン粉を３．５重量％の割
合で１％の酢酸溶液に溶解させ、１００００ｃｐｓの粘
度を有するものを口径０．１６ａｍのノズルにて４％Ｎ
ａ０）ｌ水溶液内に射出することにより紡糸した後、イ
オン交換水にてよく洗浄し乾燥させることによって繊維
状キトサンを合成した。このようにして得られた繊維状
キトサンの単繊維径は、４０１ｍだった。Example 2 Chitosan powder with a degree of deacetylation of 85% was dissolved in a 1% acetic acid solution at a ratio of 3.5% by weight, and the powder having a viscosity of 10,000 cps was injected with 4% N using a nozzle with a diameter of 0.16 am.
Fibrous chitosan was synthesized by spinning by injection into a0)l aqueous solution, thoroughly washing with ion-exchanged water, and drying. The single fiber diameter of the fibrous chitosan thus obtained was 401 m.
上記のようにして合成した繊維状キトサンを第１図に示
したような浄水器内の濾材３として使用したとき塩素臭
の除去効果について調べた。When the fibrous chitosan synthesized as described above was used as a filter medium 3 in a water purifier as shown in FIG. 1, the effect of removing chlorine odor was investigated.
繊維状キトサンの浄水作用を試験するために、塩素臭と
して有効塩素濃度１．０ｐｐ＋＊になるように調整した
多量のモデル水道水を用意し、浄水器内に２ｆ／分の流
速で流れ出るよう調節した。In order to test the water purification effect of fibrous chitosan, we prepared a large amount of model tap water that was adjusted to have an effective chlorine concentration of 1.0 pp+* as a chlorine odor, and adjusted it so that it flowed into the water purifier at a flow rate of 2 f/min. did.
２００ ｆｆｉ通水する毎に１０００μｍの浄水器通過
水をサンプリングし、通水量１０００４！になるまで繰
り返し行った。Every time 200 ffi water flows, 1000 μm of water passing through the water purifier is sampled, and the water flow rate is 10,004! Repeatedly until.
塩素臭除去率は実施例１と同様の方法で求めた。また比
較として従来型の塩素臭除去剤の濾材によく用いられて
いる活性炭を使用して同様の評価を行った。結果を表２
に示す。The chlorine odor removal rate was determined in the same manner as in Example 1. For comparison, a similar evaluation was conducted using activated carbon, which is often used as a filter medium for conventional chlorine odor removers. Table 2 shows the results.
Shown below.
表 ２
本発明品は繊維状キトサンの充填量が少ない場合でも優
れた塩素臭除去能を有し持続性も優れていることが示さ
れた。Table 2 It was shown that the product of the present invention has excellent chlorine odor removal ability and excellent sustainability even when the amount of fibrous chitosan packed is small.
また比較品の活性炭を用いたものは流出液中に黒い微粉
が観察されたが、本発明品の繊維状キトサンを用いたも
のはキトサンの流出は見られなかった。Further, black fine powder was observed in the effluent of the comparative product using activated carbon, but no chitosan was observed in the product using fibrous chitosan of the present invention.
実施例３
実施例２で用いた繊維状キトサンを１〜５ｍｍの繊維長
にカットしたもの５ｏ重量％と、パルプ（製紙用ＮＢＫ
Ｐ針葉樹クラフトパルプ）５０重量％を湿式混抄紙化し
第２図に示したような装置の濾材として用い、また比較
として活性炭を第３図に示すような装置の濾材として用
いて、予め塩素臭をつけた麦茶を濾過し、濾過後の麦茶
の味覚に対する官能評価を行った。結果を表３に示す。Example 3 50% by weight of the fibrous chitosan used in Example 2 cut into fiber lengths of 1 to 5 mm and pulp (NBK for paper making)
50% by weight of P softwood kraft pulp) was made into wet mixed paper and used as a filter medium in the apparatus shown in Fig. 2.For comparison, activated carbon was used as a filter medium in the apparatus shown in Fig. 3 to remove the chlorine odor in advance. The soaked barley tea was filtered and a sensory evaluation of the taste of the filtered barley tea was performed. The results are shown in Table 3.
表 ３
注）
４
傘官能評価評価基準
全く味がしない（麦茶の風味が消えている）あまり味が
しない（やや麦茶の風味が消えている）やや塩素臭だけ
が除去されている
塩素臭だけが除去されている
濾過前と変わらない
比較品の活性炭を用いたものは、塩素臭だけではなく麦
茶自体の風味も同時に吸着してしまったのに対して、本
発明の繊維状キトサン混抄紙を用いたものは選択的に麦
茶の塩素臭だけを取り除いた。Table 3 Note) 4 Umbrella Sensory Evaluation Criteria No taste at all (the barley tea flavor has disappeared) Not much taste (the barley tea flavor has disappeared a little) Only the chlorine odor has been removed Only the chlorine odor The comparison product using activated carbon, which is the same as before filtration, adsorbed not only the chlorine odor but also the flavor of barley tea itself, whereas the paper using the fibrous chitosan-mixed paper of the present invention Only the chlorine odor of barley tea was selectively removed.
第１図は本発明の塩素臭除去剤の一実施例を示す断面略
示図、第２図は本発明の塩素臭除去剤の他の実施例を示
す断面略示図、第３図は従来の塩素臭除去剤の一態様を
示す断面略示図である。
１・・・濾材充填部
２・・・蛇口取付は部
３・・・濾 材
４．５・・・フィルター
６・・・塩素臭除去装置本体
７・・・繊維状キトサン混抄紙
８・・・活性炭
９・・・メツシュFIG. 1 is a schematic cross-sectional view showing one embodiment of the chlorine odor removing agent of the present invention, FIG. 2 is a schematic cross-sectional view showing another example of the chlorine odor removing agent of the present invention, and FIG. 3 is a conventional FIG. 2 is a schematic cross-sectional view showing one embodiment of the chlorine odor remover. 1... Filter material filling part 2... Faucet installation part 3... Filter material 4.5... Filter 6... Chlorine odor removal device body 7... Fibrous chitosan mixed paper 8... Activated carbon 9... mesh
Claims (1)
３．５重量％溶解したときの粘度が１０００〜２５００
０ｃｐｓ（３０℃）であるキトサンを直径５〜８０μｍ
の繊維状とした繊維状キトサンを含む塩素臭除去剤。 ２ 繊維状のキトサンを、単独あるいは他の繊維と混合
し、乾式不織布とした請求項１記載の塩素臭除去剤。 ３ 繊維状のキトサンを、単独あるいは他の繊維と混合
し、湿式抄紙した請求項１記載の塩素臭除去剤。[Scope of Claims] 1. The degree of deacetylation is 60% or more, and the viscosity when dissolved at 3.5% by weight in a 1% acetic acid solution is 1000 to 2500.
0 cps (30°C) chitosan with a diameter of 5 to 80 μm
A chlorine odor remover containing fibrous chitosan. 2. The chlorine odor remover according to claim 1, wherein fibrous chitosan is used alone or mixed with other fibers to form a dry nonwoven fabric. 3. The chlorine odor remover according to claim 1, wherein fibrous chitosan is used alone or mixed with other fibers to form wet paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21574189A JP2690569B2 (en) | 1989-08-22 | 1989-08-22 | Chlorine odor remover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21574189A JP2690569B2 (en) | 1989-08-22 | 1989-08-22 | Chlorine odor remover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0380987A true JPH0380987A (en) | 1991-04-05 |
| JP2690569B2 JP2690569B2 (en) | 1997-12-10 |
Family
ID=16677435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21574189A Expired - Fee Related JP2690569B2 (en) | 1989-08-22 | 1989-08-22 | Chlorine odor remover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2690569B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100824596B1 (en) * | 2006-07-10 | 2008-04-24 | (주)그린유화 | Defoaming manufacturing method for natural emulsion-type the chitosan and germanium mixed compound. |
| CN104609486A (en) * | 2015-01-30 | 2015-05-13 | 无锡昊瑜节能环保设备有限公司 | Sewage treatment agent and preparation method thereof |
| CN107511141A (en) * | 2017-10-16 | 2017-12-26 | 郑州大学 | A kind of composite cellulosic membrane for adsorbing heavy metal and preparation method thereof |
| JP2021122298A (en) * | 2020-01-31 | 2021-08-30 | 株式会社Tree Field | Extraction device |
-
1989
- 1989-08-22 JP JP21574189A patent/JP2690569B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100824596B1 (en) * | 2006-07-10 | 2008-04-24 | (주)그린유화 | Defoaming manufacturing method for natural emulsion-type the chitosan and germanium mixed compound. |
| CN104609486A (en) * | 2015-01-30 | 2015-05-13 | 无锡昊瑜节能环保设备有限公司 | Sewage treatment agent and preparation method thereof |
| CN107511141A (en) * | 2017-10-16 | 2017-12-26 | 郑州大学 | A kind of composite cellulosic membrane for adsorbing heavy metal and preparation method thereof |
| CN107511141B (en) * | 2017-10-16 | 2019-12-24 | 郑州大学 | Composite fiber membrane for adsorbing heavy metals and preparation method thereof |
| JP2021122298A (en) * | 2020-01-31 | 2021-08-30 | 株式会社Tree Field | Extraction device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2690569B2 (en) | 1997-12-10 |
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