JPS6365923A - Precoating type filtration - Google Patents
Precoating type filtrationInfo
- Publication number
- JPS6365923A JPS6365923A JP61207992A JP20799286A JPS6365923A JP S6365923 A JPS6365923 A JP S6365923A JP 61207992 A JP61207992 A JP 61207992A JP 20799286 A JP20799286 A JP 20799286A JP S6365923 A JPS6365923 A JP S6365923A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- ion exchange
- water
- filter aid
- treated
- 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
- 238000001914 filtration Methods 0.000 title claims abstract description 31
- 239000000835 fiber Substances 0.000 claims abstract description 15
- 238000005342 ion exchange Methods 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 12
- 150000001768 cations Chemical class 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 239000002002 slurry Substances 0.000 claims abstract description 9
- 239000004952 Polyamide Substances 0.000 claims abstract description 8
- 229920002647 polyamide Polymers 0.000 claims abstract description 8
- 150000001450 anions Chemical class 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims abstract description 3
- 229920005989 resin Polymers 0.000 claims abstract description 3
- 230000002378 acidificating effect Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 125000002843 carboxylic acid group Chemical group 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 28
- 239000002253 acid Substances 0.000 abstract description 6
- 239000011159 matrix material Substances 0.000 abstract 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 8
- 239000003729 cation exchange resin Substances 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 239000008400 supply water Substances 0.000 description 4
- 238000005341 cation exchange Methods 0.000 description 3
- 239000003957 anion exchange resin Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009924 canning Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229930194909 coatline Natural products 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Treatment Of Water By Ion Exchange (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〕
この発明は、水のろ過に用いられるプレコート式ろ過方
法に関し、特に原子力発電所などから出る排水のろ過に
用いられるプレコート式ろ過方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a precoat type filtration method used for water filtration, and particularly to a precoat type filtration method used for filtering wastewater discharged from nuclear power plants and the like.
従来原子力発電所で使用され、あるいはそこから排出さ
れる水に含まれる懸濁状あるいはイオン状の不純物の除
去には、強酸性カチオン交換樹脂粉末と強塩基性アニオ
ン交換樹脂粉末を混会してろ過助剤として用いるプレコ
ート式ろ過方法が用いられている。To remove suspended or ionic impurities contained in water conventionally used in or discharged from nuclear power plants, a mixture of strongly acidic cation exchange resin powder and strongly basic anion exchange resin powder is used. A precoat type filtration method is used in which the filter is used as a filter aid.
そして、このろ過助剤ｆプレコートする際、ろ過助剤を
所定の低濃度のスラリーとしてろ過エレメント上にプレ
コートすれば、高分子電解質を使用せずに良好なプレコ
ート層を形成することができる。When precoating the filter aid f, if the filter aid is precoated on the filter element as a predetermined low-concentration slurry, a good precoat layer can be formed without using a polymer electrolyte.
〔発明が解決し７ようとする問題点〕
この強は性力チオン交換樹脂粉末と強塩基性アニオン交
換樹脂粉末をろ過助剤として用いろプレコート式ろ過方
法は、懸濁状あるいはイオン状の不純物をよく除去１き
、水質の向上に効果があるが使用済みのろ過助剤自身が
廃棄物として発生する。この使用済みのろ過助剤の処分
はアスファルト等〒固めてドラム缶詰めとしているが、
容積が大きくなる。また、焼却しようとすると、イオン
交換基に硫黄を含む（−５Ｏ３Ｉ−１）型強改性カチオ
ン交換樹脂粉末からはＳＯｘを発生するため、脱硫装置
等の対価黄対策が必要であった。[Problems to be Solved by the Invention] This pre-coat type filtration method uses a strong ion exchange resin powder and a strong basic anion exchange resin powder as filter aids, which eliminates suspended or ionic impurities. Although it is effective in improving water quality, the used filter aid itself is generated as waste. This used filter aid is disposed of by solidifying it with asphalt or other materials and canning it in drums.
The volume increases. Furthermore, when incineration is attempted, SOx is generated from the (-5O3I-1) type strongly modified cation exchange resin powder containing sulfur in the ion exchange group, so countermeasures against yellowing, such as a desulfurization device, are required.
そこで、この発明は、強酸性カチオン交換樹脂粉末の代
りにポリアミドを母材とし、イオン交換基としてカルダ
ン酸基を持つ弱酸性イオン交換繊維をろ過助剤の一成分
として用いろようにしたものフあって、それによって、
強酸型カチオン交換樹脂粉末を用いた場合圧死べ不純物
の除去量が増大し、かつろ過助剤に硫黄を含まないため
簡単に焼却受きるようになったものマある。Therefore, the present invention has been developed to use a polyamide base material instead of a strongly acidic cation exchange resin powder and a weakly acidic ion exchange fiber having a cardanic acid group as an ion exchange group as a component of the filter aid. There is, and by that,
When a strong acid type cation exchange resin powder is used, the amount of impurities removed by crushing increases, and since the filter aid does not contain sulfur, it can be easily incinerated.
すなわち、この発明は、ポリアミドを母材とし、イオン
交換基としてカルダン酸基を持つ弱酸性イオン交換繊維
からなるカチオン交換体、および強塩基性粉末樹脂から
なるアニオン交換体をろ過助剤として使用し、これらの
混合物のろ過助剤を低濃度のスラリーとしたもの〒ろ過
エレメント上にプレコートし、その層の外側から内側に
被処理液を通液することにより被処理液中の不純物を除
去することを特徴とするプレコート式ろ過方法〒ある。That is, the present invention uses a cation exchanger made of a weakly acidic ion exchange fiber having a polyamide as a base material and a cardanic acid group as an ion exchange group, and an anion exchanger made of a strongly basic powdered resin as a filter aid. A filter aid made from a mixture of these into a low-concentration slurry is pre-coated on a filtration element, and impurities in the liquid to be treated are removed by passing the liquid from the outside to the inside of the layer. There is a pre-coat filtration method that is characterized by:
この発明で使用する、ポリアミ１′ヲ母材とし、イオン
交換基としてカルメン酸基をもつ弱酸性イオン交換繊維
からなるカチオン交換体は、繊維トしてよく使用される
ポリアミドを母材としており、イオン交換基として遊離
のカルボン酸基を持つように変成して得られるもの１、
弱酸性イオン交換繊維としては公知のものである。弱酸
性イオン交換４Ｊ１．維としては径が１０〜５０μフ、
長さが２ｏ。The cation exchanger used in this invention, which is made of polyamide 1' as a base material and weakly acidic ion exchange fibers having carmenic acid groups as ion exchange groups, has a polyamide base material that is often used as a fiber. Those obtained by modification to have a free carboxylic acid group as an ion exchange group 1,
This is a well-known weakly acidic ion exchange fiber. Weakly acidic ion exchange 4J1. The fiber has a diameter of 10 to 50μ,
The length is 2o.
〜１０００μのものが使用に適し、長さについては好ま
しくは３００〜５００μのものがよい。~1000μ is suitable for use, and the length is preferably 300~500μ.
ろ過助剤として用いられるカチオン交換体とアニオン交
換体は、その混合比率が、カチオン交換体の乾燥Ｍｕ／
アニオン交換体の乾燥Ｎｔの比〒昇〜へとするのが好ま
しい。The cation exchanger and anion exchanger used as filter aids have a mixing ratio of cation exchanger dry Mu/
It is preferable that the dry Nt ratio of the anion exchanger is increased to .about.
また、このろ過助剤をろ過エレメント上にプレコートす
るにさいしてはる過助剤Ｚ所定の低濃度のスラリーとし
てプレコートを行うのがよいが、そのスラリー濃ｔＷは
ろ過助剤の乾燥ｚｚ−’ｅｏ、ｏ１〜０．０５重量％と
するのが適（７ている。In addition, when pre-coating this filter aid onto the filter element, it is preferable to pre-coat it as a slurry with a predetermined low concentration of the super-aid Z, but the slurry concentration tW is determined by the drying Zzz-' of the filter aid. It is suitable that eo and o are 1 to 0.05% by weight (7%).
次に、この発明のプレコート式ろ過方法におけるプレコ
ートの形成やろ過の態様を図面によって説明する。Next, aspects of precoat formation and filtration in the precoat type filtration method of the present invention will be explained with reference to the drawings.
ろ過助剤供給タンク４にろ過助剤と水を入れてかく拌機
９でよく混合する。プレフートポンプ５を起動し、プレ
コートタンク３からプレコートポンプ５を経てろ過器１
に至る流れを生ずる。ろ過助剤供給水ライン１３から供
給水を流し、ろ過助剤供給タンク４からエゼクタ６によ
りろ過助剤をプレコートライン１５に送入して所定の低
濃度のスラリーを形成してろ過器１へ送り、ろ過器１の
口ｉＭエレメント２の上にプレコートすり。８はろ過助
剤供給水の流量を知るための流量計１ある。A filter aid and water are placed in a filter aid supply tank 4 and mixed well with a stirrer 9. Start the pre-foot pump 5, and the filter 1 will flow from the pre-coat tank 3 through the pre-coat pump 5.
This creates a flow that leads to. Supply water is flowed from the filter aid supply water line 13, and the filter aid is sent from the filter aid supply tank 4 to the precoat line 15 by the ejector 6 to form a predetermined low concentration slurry and sent to the filter 1. , pre-coat the top of the iM element 2 of the filter 1. 8 is a flow meter 1 for determining the flow rate of filter aid supply water.
プレコートの完了後、プレコートポンプ５を停止し、保
持ポンプ２２を起動してろ過器１に入り、さらに保持ポ
ンプ２２へと戻る保持ライン２３の流れを生じさせ、プ
レコートを停止する。なお、保持ライン２３の流れがな
いとプレコートが剥離する危険がある。After the precoat is completed, the precoat pump 5 is stopped, the holding pump 22 is activated to create a flow in the holding line 23 into the filter 1 and back to the holding pump 22, and the precoating is stopped. Note that if there is no flow in the holding line 23, there is a risk that the precoat will peel off.
次いで、被処理水人口１１から被処理水をろ過器１へ送
り、処理水出口１２から処理水を導出するようにすると
共に、保持ポンプ２２を停止して、ろ過の作業を行う。Next, the water to be treated is sent from the water to be treated 11 to the filter 1, and the treated water is led out from the treated water outlet 12, and the holding pump 22 is stopped to perform the filtration work.
７は処理水の流量を知るための流量計である。7 is a flow meter for determining the flow rate of treated water.
ろ過の作業が進むにつれて、不純物がろ過エレメント上
に堆積するためろ過に要する圧力が増し、その差圧を差
圧計１０で測定するが、その差圧が１、７５ ｋｌｌＦ
／ｉとなったら、保持ポンプ２２を起動し、被処理水人
口１１および処理水出口１２を止める。As the filtration process progresses, impurities accumulate on the filtration element, so the pressure required for filtration increases, and the differential pressure is measured with a differential pressure gauge 10, which is 1.75 kllF.
/i, the holding pump 22 is started and the treated water population 11 and treated water outlet 12 are stopped.
ろ過器１の上部に空気人口１７がら空気を導入し、ドー
ムドレン１８から水を排出する。水の排出が終ったなら
ばドームドレン１８を閉め、ろ過器１の上部に空気を圧
力が６〜７ゆ−となるま↑貯める。空気が貯まったら、
逆洗出口２０を開け、使用済みのろ過助剤を空気逆洗に
より排出する。Air is introduced into the upper part of the filter 1 through an air port 17, and water is discharged from a dome drain 18. When the water has been drained, the dome drain 18 is closed and air is stored in the upper part of the filter 1 until the pressure reaches 6 to 7 yu. When air accumulates,
The backwash outlet 20 is opened and the used filter aid is discharged by air backwash.
その後管板ベンド１９の管路を開け、洗浄水ライン２４
から洗浄水を入れな佛ら、空気人口２１からの空気によ
りスクラビングし、ろ過エレメント２を洗浄する。洗浄
水がろ過器１中に一杯となったら、再びろ過器１の上部
から空気を入れ空気逆洗して排水する。その後、ろ過器
１中を満水として次サイクルのろ過運転をする。After that, open the pipe line of the tube plate bend 19 and clean the water line 24.
Without adding cleaning water, the filter element 2 is scrubbed with air from the air supply 21 to clean it. When the filter 1 is full of washing water, air is again introduced from the top of the filter 1 to backwash the water and drain the water. Thereafter, the filter 1 is filled with water for the next cycle of filtration operation.
なお、図面において、１４はプレコートタンク６に連結
するプレコート戻りライン受あり、１６はベント１ある
。In the drawings, reference numeral 14 indicates a precoat return line receiver connected to the precoat tank 6, and reference numeral 16 indicates a vent 1.
ここで、この発明の実施例を表によって示すが、この発
明はこれに限られるものではない。Here, examples of the present invention are shown in the form of tables, but the present invention is not limited thereto.
なお、不純物として実プラントを模擬した鉄クラツドを
、入口濃度（Ｆｅ基準）３〜６四として入れた水を被処
理水とした。The water to be treated was water into which iron cladding, which simulated an actual plant, was added as an impurity at an inlet concentration (Fe standard) of 3 to 64.
また、ろ過寿命、鉄除去率は、強酸性カチオン交換樹脂
粉末を使用した場合の結果を１としたものを基準として
表わしたへ
ろ過寿命は通水差圧が１．７５にＰ／７となるまでの補
足鉄量の値で比較した。In addition, the filtration life and iron removal rate are expressed based on the result when using a strongly acidic cation exchange resin powder.The filtration life is P/7 when the water flow differential pressure is 1.75. Comparisons were made with the supplementary iron content values up to.
測定条件、測定結果を表１に示す。Table 1 shows the measurement conditions and measurement results.
なお、試験の過程で、プレコート濃度は従来と同等でよ
く、繊維の長さは２００〜１０００μ、好ましくは３０
０〜５００μとするとプレコート性の良いことがわかっ
た。In addition, during the test process, the precoat concentration may be the same as the conventional one, and the fiber length is 200 to 1000μ, preferably 30μ.
It was found that precoating properties were good when the thickness was 0 to 500μ.
上表によれば、この発明〒は従来技術と比べて鉄除去率
は同程度であるが、ろ過寿命が１．２〜２．６倍も増え
る。これは、強酸性カチオン交換樹脂粉末と比べ、弱酸
性カチオン交換繊維の場合は同じ量を使用してもプレコ
ート層の厚みが厚く、また繊維があるとプレコートＪＦ
Ａの圧密が小さく体積ろ過がしやすい性状となりろ過寿
命が増えると考えらねる。According to the above table, the present invention has the same iron removal rate as the conventional technology, but the filtration life is increased by 1.2 to 2.6 times. This is because, compared to strongly acidic cation exchange resin powder, in the case of weakly acidic cation exchange fibers, the thickness of the precoat layer is thicker even if the same amount is used, and if there are fibers, the precoat layer will be thicker.
It is thought that the compaction of A is small and the property makes volume filtration easier, which increases the filtration life.
この発明では、ろ過助剤の一釉に従来の強酸性カチオン
交換樹脂粉末の代りに、ポリアミドを母材とし、カルぎ
ン酸基を交換基とした弱酸性カチオン交換繊維を用いる
ことによって、処理水の不純物のリーク量は同等に維持
しながらろ過寿命を長くすることができる。また、この
カチオン交換繊維は硫黄を含まないから、硫黄対策を要
しないで燃焼することが雫き、最終廃棄物量を低減でき
るものである。そして、ろ過寿命が長くなることにより
全体の鉄除去石；もそれに比例して１．２〜２．６倍と
増える。In this invention, instead of the conventional strongly acidic cation exchange resin powder for one glaze of the filter aid, weakly acidic cation exchange fibers made of polyamide as a base material and having carginic acid groups as an exchange group are used. It is possible to extend the filtration life while maintaining the same amount of water impurity leakage. Furthermore, since this cation exchange fiber does not contain sulfur, it does not require any sulfur countermeasures and is not burned, thereby reducing the amount of final waste. As the filtration life becomes longer, the total number of iron-removal stones increases proportionally by 1.2 to 2.6 times.
第１図は、この発明を実施するのに用いる装置の一例を
示したものマある。
１：ろ過器 ２：ろ過エレメント６：プレコ
ートタンク ４：ろ過助剤供給タンク５：プレコートボ
ンゾ ６：エゼクタ
９：攪拌機 １１：被処理水人口１２：処即水
出口 １３：ろ過助剤供給水ライン１５：ゾレコ
ートラインFIG. 1 shows an example of an apparatus used to carry out the invention. 1: Filter 2: Filtration element 6: Pre-coat tank 4: Filter aid supply tank 5: Pre-coat bonzo 6: Ejector 9: Stirrer 11: Water population to be treated 12: Immediate water outlet 13: Filter aid supply water line 15 :Sole coat line
Claims (4)
ボン酸基を持つ弱酸性イオン交換繊維からなるカチオン
交換体、および強塩基性樹脂粉末からなるアニオン交換
体をろ過助剤として使用し、これらの混合物のろ過助剤
を低濃度のスラリーとしたものでろ過エレメント上にプ
レコートし、その層の外側から内側に被処理液を通液す
ることにより被処理液中の不純物を除去することを特徴
とするプレコート式ろ過方法。(1) A cation exchanger made of polyamide as a base material and a weakly acidic ion exchange fiber having a carboxylic acid group as an ion exchange group, and an anion exchanger made of a strong basic resin powder are used as filter aids. It is characterized by pre-coating the filtration element with a low-concentration slurry of the filter aid mixture, and removing impurities from the liquid to be treated by passing the liquid from the outside to the inside of this layer. Pre-coated filtration method.
さが２００〜１０００μで、好ましくは長さが３００〜
５００μであるものからなる特許請求の範囲第１項記載
のプレコート式ろ過方法。(2) The weakly acidic ion exchange fiber has a diameter of 10 to 50μ, a length of 200 to 1000μ, and preferably a length of 300 to 50μ.
The precoat type filtration method according to claim 1, wherein the precoat type filtration method is 500μ.
、カチオン交換体の乾燥重量／アニオン交換体の乾燥重
量の比で１／２〜３／１とすることからなる特許請求の
範囲第１項記載のプレコート式ろ過方法。(3) Claim 1, wherein the mixing ratio of the cation exchanger and the anion exchanger is 1/2 to 3/1 in terms of dry weight of cation exchanger/dry weight of anion exchanger. Pre-coat filtration method described in section.
剤のスラリー濃度は、スラリー中のろ過助剤が乾燥重量
で０．０１〜０．０５重量％とすることからなる特許請
求の範囲第１項記載のプレコート式ろ過方法。(4) The slurry concentration of the filter aid when precoating on the filter element is 0.01 to 0.05% by dry weight of the filter aid in the slurry, as claimed in claim 1. Pre-coated filtration method as described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61207992A JPS6365923A (en) | 1986-09-05 | 1986-09-05 | Precoating type filtration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61207992A JPS6365923A (en) | 1986-09-05 | 1986-09-05 | Precoating type filtration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6365923A true JPS6365923A (en) | 1988-03-24 |
| JPH051043B2 JPH051043B2 (en) | 1993-01-07 |
Family
ID=16548883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61207992A Granted JPS6365923A (en) | 1986-09-05 | 1986-09-05 | Precoating type filtration |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6365923A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6045820A (en) * | 1992-09-16 | 2000-04-04 | Triosyn Corporation | Iodine/resin disinfectant a procedure for the preparation thereof |
| US6680050B1 (en) | 1992-09-16 | 2004-01-20 | Triosyn Holdings, Inc. | Iodine/resin disinfectant and a procedure for the preparation thereof |
-
1986
- 1986-09-05 JP JP61207992A patent/JPS6365923A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6045820A (en) * | 1992-09-16 | 2000-04-04 | Triosyn Corporation | Iodine/resin disinfectant a procedure for the preparation thereof |
| US6680050B1 (en) | 1992-09-16 | 2004-01-20 | Triosyn Holdings, Inc. | Iodine/resin disinfectant and a procedure for the preparation thereof |
| US6899868B2 (en) | 1992-09-16 | 2005-05-31 | Triosyn Holding Inc. | Iodine/resin disinfectant and a procedure for the preparation thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH051043B2 (en) | 1993-01-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |