JPH06339602A - Flocculating agent - Google Patents
Flocculating agentInfo
- Publication number
- JPH06339602A JPH06339602A JP6804493A JP6804493A JPH06339602A JP H06339602 A JPH06339602 A JP H06339602A JP 6804493 A JP6804493 A JP 6804493A JP 6804493 A JP6804493 A JP 6804493A JP H06339602 A JPH06339602 A JP H06339602A
- Authority
- JP
- Japan
- Prior art keywords
- water
- flocculating
- treated
- inorg
- environment
- 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
- 239000008394 flocculating agent Substances 0.000 title abstract 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 7
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000292 calcium oxide Substances 0.000 claims abstract description 6
- 230000004931 aggregating effect Effects 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 150000002484 inorganic compounds Chemical class 0.000 claims description 5
- 229910010272 inorganic material Inorganic materials 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 33
- 150000003839 salts Chemical class 0.000 abstract description 15
- 229910052751 metal Inorganic materials 0.000 abstract description 14
- 239000002184 metal Substances 0.000 abstract description 14
- 230000003311 flocculating effect Effects 0.000 abstract description 8
- 230000007935 neutral effect Effects 0.000 abstract description 7
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 abstract description 4
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 4
- 239000004927 clay Substances 0.000 abstract description 3
- 239000000654 additive Substances 0.000 abstract description 2
- 239000004615 ingredient Substances 0.000 abstract 2
- 150000002894 organic compounds Chemical class 0.000 description 14
- 230000002411 adverse Effects 0.000 description 8
- 239000010802 sludge Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000002776 aggregation Effects 0.000 description 4
- 239000000701 coagulant Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000004220 aggregation Methods 0.000 description 3
- 239000012752 auxiliary agent Substances 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 229920006318 anionic polymer Polymers 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- -1 silicic acid is used Chemical class 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、河川、溜め池、ゴルフ
場池、一般工場排水等において浮遊するヘドロ、汚泥、
スラッジ等の浮遊物質や堆積汚泥の揚泥に伴う親水性泥
状物の処理に使用される凝集剤に関し、特に、親水性泥
状物に含まれるコロイド物質や懸濁物質を凝集させて沈
殿させることにより、浄化水が得られる凝集剤に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to sludge, sludge, floating in rivers, reservoirs, golf course ponds, general factory drainage, etc.
Flocculant used to treat suspended solids such as sludge and hydrophilic sludge associated with lifting sludge, especially colloidal substances and suspended solids contained in the hydrophilic sludge to precipitate Thus, the present invention relates to a coagulant capable of obtaining purified water.
【０００２】[0002]
【従来の技術】河川等に堆積、浮遊するヘドロ等の親水
性泥状物や極微粒子の浮遊物質等は、異臭を放って環境
汚染の原因となるだけでなく、水質汚濁の原因にもなっ
ている。このために、浮遊物質が含まれる工場排水や各
水域等に凝集剤を添加したり、各水域内に堆積する汚泥
を揚泥する際に凝集剤を添加して、コロイド物質や懸濁
物質を凝集沈降させることにより、汚濁物質と透明で清
浄な水とに分離することが行われている。このような凝
集剤としては、通常、硅酸、硫酸カルシウム等の一種類
の無機金属塩、あるいは、このような一種類の無機金属
塩と有機化合物とを組み合わせて、まず、無機金属塩を
被処理水に添加して一次フロックを形成した後に、高分
子有機化合物を被処理水に添加してコロイド物質や懸濁
物質を凝集沈降させるもの等が使用されている。2. Description of the Related Art Hydrophilic muddy substances such as sludge floating in rivers and floating substances such as ultrafine particles not only emit an offensive odor and cause environmental pollution, but also cause water pollution. ing. For this reason, a flocculant is added to factory wastewater or water bodies containing suspended solids, or a flocculant is added when sludge accumulated in each water body is lifted to remove colloidal substances or suspended substances. Separation into pollutants and transparent and clean water is performed by coagulating and settling. As such an aggregating agent, usually, one kind of inorganic metal salt such as silicic acid or calcium sulfate, or a combination of one kind of inorganic metal salt and an organic compound is first treated with an inorganic metal salt. A method is used in which a high molecular weight organic compound is added to treated water to form primary flocs, and then a high molecular weight organic compound is added to treated water to cause a colloidal substance or a suspended substance to aggregate and settle.
【０００３】[0003]
【発明が解決しようとする課題】硅酸等の一種類の無機
金属塩を使用する場合には、無機金属塩がほぼ中性であ
るために、処理水も中性領域内になり、しかも、環境等
に悪影響を及ぼさないという利点がある。しかしなが
ら、無機金属塩の添加によって形成される一次フロック
は０．３ｍｍ〜０．５ｍｍ程度と小さいために凝集能力
が小さい。その結果、沈降速度が遅く、処理時間が長く
なり、しかも、懸濁物質等を水から完全に分離すること
ができない。さらには、懸濁水の濃度が上昇するにつれ
て、凝集能力効果がほとんど見られなくなる。従って、
処理水を完全には透明にすることができないという問題
と、処理時間が長くなりすぎるために周辺設備ロスが大
きくランニングコストが非常に高くなるという問題とが
ある。When one kind of inorganic metal salt such as silicic acid is used, the treated water is in the neutral region because the inorganic metal salt is almost neutral, and It has the advantage of not adversely affecting the environment. However, the primary floc formed by the addition of the inorganic metal salt is as small as about 0.3 mm to 0.5 mm, and therefore has a small aggregation ability. As a result, the sedimentation speed is slow, the treatment time is long, and the suspended solids cannot be completely separated from water. Furthermore, as the concentration of suspended water increases, the effect of flocculation capacity becomes almost non-existent. Therefore,
There are problems that the treated water cannot be made completely transparent and that the treatment time becomes too long, resulting in a large loss of peripheral equipment and a very high running cost.
【０００４】これに対して、一種類の無機金属塩に高分
子有機化合物を添加した凝集剤では、無機金属塩によっ
て形成された一次フロックが、添加される高分子有機化
合物の架橋作用によりコロイド粒子を吸着するために、
フロックは順次大きくなる。従って、沈降速度が速く凝
集効果に優れている。On the other hand, in the flocculant obtained by adding a high molecular weight organic compound to one type of inorganic metal salt, the primary flocs formed by the inorganic metal salt are colloidal particles due to the crosslinking action of the high molecular weight organic compound added. To adsorb
Flock grows larger. Therefore, the sedimentation speed is high and the aggregation effect is excellent.
【０００５】しかし、高分子有機化合物は二次汚染や凝
集剤の腐敗等により環境に対して悪影響を及ぼすおそれ
があり、極力使用を控えることが好ましい。また、高分
子有機化合物を使用する場合には、架橋反応によってフ
ロックが大きくなるために、フロックの大きさは、架橋
反応が行われる範囲内では高分子有機化合物の添加量に
比例するが、架橋反応が終了するとフロック表面が高分
子有機化合物によって被覆された状態になり、それ以上
はフロックが大きくならず凝集作用は停止する。このた
め、被処理水に対して高分子有機化合物の量が少ない場
合には、フロックが完全に大きくならない状態で凝集反
応が終了し、処理水は完全には透明にならずに懸濁状態
になる。反対に、高分子有機化合物の量が多くなれば、
凝集反応が終了すると、多くの凝集剤が凝集作用を発揮
することなく浪費されるために、環境に対して悪影響を
及ぼすとともに、ランニングコストが高くなり長期的な
経済性が損なわれる。However, high molecular weight organic compounds may adversely affect the environment due to secondary pollution, spoilage of coagulants, etc., and it is therefore preferable to refrain from using them as much as possible. Further, when a high molecular weight organic compound is used, the size of the floc is proportional to the amount of the high molecular weight organic compound added within the range where the crosslinking reaction is carried out, since the size of the floc increases due to the crosslinking reaction. When the reaction is completed, the floc surface becomes covered with the high molecular weight organic compound, and the floc is not increased further and the aggregating action is stopped. For this reason, when the amount of the high molecular weight organic compound is small relative to the water to be treated, the flocculation reaction is completed without the flocs becoming completely large, and the treated water is not completely transparent but is in a suspended state. Become. On the contrary, if the amount of high molecular weight organic compound increases,
When the aggregating reaction is completed, many aggregating agents are wasted without exhibiting an aggregating action, which adversely affects the environment and increases running costs, which impairs long-term economic efficiency.
【０００６】また、高分子有機化合物では、被処理水の
粘土成分の割合等によっては有効に凝集能力を発揮しな
い物質もある。このために、被処理水を分析して、有効
に凝集作用を発揮する高分子有機化合物を選定する必要
がある。Further, among high molecular weight organic compounds, there are some substances which do not effectively exhibit the aggregating ability depending on the ratio of the clay component of the water to be treated. For this reason, it is necessary to analyze the water to be treated and select a high molecular weight organic compound that effectively exhibits an aggregating action.
【０００７】本発明は、このような問題を解決するもの
であり、その目的は、二次汚染や添加剤の腐敗等の環境
に悪影響を及ぼすおそれがなく、しかも、優れた凝集性
能を有する凝集剤を提供することにある。The present invention is intended to solve such a problem, and its object is to prevent the adverse effects on the environment such as secondary pollution and spoilage of additives, and to provide an agglomerate having an excellent agglomeration performance. To provide the agent.
【０００８】[0008]
【課題を解決するための手段】本発明の凝集剤は、酸化
カルシウムを主成分として、複数の無機化合物によって
構成されていることを特徴とするものであり、そのこと
により上記目的が達成される。The aggregating agent of the present invention is characterized in that it comprises calcium oxide as a main component and is composed of a plurality of inorganic compounds, thereby achieving the above object. .
【０００９】[0009]
【作用】本発明の凝集剤では、酸化カルシウムを主成分
とする複数の無機化合物によって構成されているため
に、添加量に比例した凝集効果が得られ、しかも、多量
に使用しても環境に悪影響を及ぼすおそれがない。Since the flocculant of the present invention is composed of a plurality of inorganic compounds containing calcium oxide as a main component, the flocculating effect is obtained in proportion to the addition amount, and even if it is used in a large amount, it is environmentally friendly. There is no risk of adverse effects.
【００１０】[0010]
【実施例】以下、本発明の実施例を説明する。EXAMPLES Examples of the present invention will be described below.
【００１１】本発明の凝集剤は、酸化カルシウムを主成
分として、複数の無機化合物によって構成されている。
その一例を表１に示す。The flocculant of the present invention comprises calcium oxide as a main component and a plurality of inorganic compounds.
An example is shown in Table 1.
【００１２】[0012]
【表１】 [Table 1]
【００１３】このように、本発明の凝集剤は、高分子有
機化合物を含まず複数の無機金属塩のみ、特に、約１／
３（重量％）が酸化カルシウム（ＣａＯ）、約１／５
（重量％）を硅酸（ＳｉＯ2 ）によって構成されている
ために、環境に悪影響を及ぼさず、しかも、ｐＨ７〜８
とほぼ中性の弱アルカリ性になっている。なお、この凝
集剤は、比重２．３０の灰色粉体である。As described above, the flocculant of the present invention does not contain a high molecular weight organic compound, and only a plurality of inorganic metal salts, particularly about 1 /
3 (wt%) is calcium oxide (CaO), about 1/5
Since (wt%) is composed of silicic acid (SiO 2 ), it has no adverse effect on the environment and has a pH of 7-8.
And it is almost neutral and weakly alkaline. The aggregating agent is a gray powder having a specific gravity of 2.30.
【００１４】このような凝集剤は、通常、酸化アルミニ
ウム（Ａｌ2 Ｏ 3）溶液および塩化鉄（ＦｅＣｌ3 ）溶
液が補助剤として使用されて、処理水を完全に中性にす
ることができる。酸化アルミニウム溶液の濃度は、１
０．０〜１１．０％程度が好ましく、また、塩化鉄溶液
の濃度は、３７．０〜３９．０％程度が好ましい。Such a flocculant can usually completely treat the treated water by using aluminum oxide (Al 2 O 3 ) solution and iron chloride (FeCl 3 ) solution as auxiliary agents. The concentration of aluminum oxide solution is 1
It is preferably about 0.0 to 11.0%, and the concentration of the iron chloride solution is preferably about 37.0 to 39.0%.
【００１５】本発明の凝集剤は、凝集すべき泥水等の被
処理水の性状によって添加量が異なるが、通常は、２０
０ｇ／ｍ3 〜７００ｇ／ｍ3 程度の割合で被処理水に添
加される。補助剤は、通常は、１００ｃｃ／ｍ3 〜３５
０ｃｃ／ｍ3 程度の割合で被処理水に添加される。ま
た、主剤および補助剤が多量に被処理水に添加されて
も、環境には悪影響を及ぼさない。The coagulant of the present invention is added in an amount different depending on the properties of the water to be treated such as muddy water to be coagulated.
It is added to the water to be treated at a rate of approximately 0g / m 3 ~700g / m 3 . The auxiliary agent is usually 100 cc / m 3 to 35.
It is added to the water to be treated at a rate of about 0 cc / m 3 . Moreover, even if a large amount of the main agent and the auxiliary agent are added to the water to be treated, the environment is not adversely affected.
【００１６】このような凝集剤の凝集性能を実験した。
被処理水として含泥率１０％の泥水５００ｃｃに、表１
の成分の凝集剤２５０ｍｇを投入して攪拌した。続い
て、処理水を中性にするべく、補助剤として、酸化アル
ミニウム（Ａｌ2 Ｏ 3）溶液を１ｃｃと、塩化鉄（Ｆｅ
Ｃｌ3 ）溶液０．５ｃｃとを添加して攪拌した。２分
後、５分後、および１０分後における凝集物の堆積量
（深さ）をそれぞれ測定するとともに、フロックの粒径
を調べたところ、表２の結果が得られた。処理水は透明
であった。The aggregating performance of such an aggregating agent was tested.
As the water to be treated, in 500 cc of mud containing 10% mud, Table 1
250 mg of the aggregating agent of the above component was added and stirred. Then, in order to make the treated water neutral, 1 cc of aluminum oxide (Al 2 O 3 ) solution and iron chloride (Fe
Cl 3 ) solution 0.5 cc was added and stirred. When the amount (depth) of the aggregates was measured after 2 minutes, 5 minutes, and 10 minutes, and the particle size of the flocs was examined, the results shown in Table 2 were obtained. The treated water was transparent.
【００１７】[0017]
【表２】 [Table 2]
【００１８】比較のために、一種類の無機金属塩である
硫酸アルミニウム（粉体）を使用した凝集剤２５０ｍｇ
を、被処理水として同様の泥水５００ｃｃに投入して凝
集性能を実験した。結果を表３に示す。For comparison, 250 mg of an aggregating agent using aluminum sulfate (powder) which is one kind of inorganic metal salt
Was added to the same muddy water of 500 cc as the water to be treated, and the flocculation performance was tested. The results are shown in Table 3.
【００１９】[0019]
【表３】 [Table 3]
【００２０】このように、一種類の無機金属塩によって
構成された凝集剤では、形成されるフロックが小さく、
本発明の凝集剤のような速い沈降速度は得られなかっ
た。処理水も若干濁っており、本発明のような透明度は
得られなかった。As described above, in the coagulant composed of one kind of inorganic metal salt, the flocs formed are small,
The high settling rate of the flocculant of the present invention was not obtained. The treated water was also slightly cloudy, and the transparency as in the present invention was not obtained.
【００２１】さらに、比較のために、有機系の凝集剤と
してアニオン系高分子凝集剤を使用して同様の実験をし
た。この場合、被処理水である泥水５００ｃｃに予めポ
リ塩化アルミニウム１ｃｃを添加して攪拌することによ
り一次フロックを形成し、その後に、アニオン系高分子
凝集剤の０．１％溶液を２５ｃｃ添加して攪拌した。結
果を表４に示す。Further, for comparison, the same experiment was conducted using an anionic polymer flocculant as the organic flocculant. In this case, 1 cc of polyaluminum chloride was previously added to 500 cc of muddy water to be treated and stirred to form primary flocs, and then 25 cc of a 0.1% solution of anionic polymer flocculant was added. It was stirred. The results are shown in Table 4.
【００２２】[0022]
【表４】 [Table 4]
【００２３】このように、有機系の凝集剤を使用した場
合には、本発明の凝集剤よりも、若干優れた凝集効果が
得られるものの、環境に対する悪影響等を勘案すると、
複数の無機金属塩によって構成される本発明の凝集剤
は、有機系の凝集剤の凝集効果に決して劣るものではな
く、単独の無機塩を使用する場合に比べて、はるかに優
れた凝集効果を奏する。As described above, when the organic flocculant is used, although the flocculating effect which is slightly superior to that of the flocculant of the present invention is obtained, the adverse effect on the environment is taken into consideration.
The flocculant of the present invention composed of a plurality of inorganic metal salts is not inferior to the flocculating effect of the organic flocculant, and has a far superior flocculating effect as compared with the case of using a single inorganic salt. Play.
【００２４】[0024]
【発明の効果】本発明の凝集剤は、このように、酸化カ
ルシウムを主成分とする複数の無機化合物によって構成
されているために、多量に使用しても環境に悪影響を及
ぼすおそれがなく、しかも、優れた凝集効果を奏する。
その結果、透明であって中性の処理水が得られる。さら
には、被処理水における粘土成分等の割合によっても凝
集能力が変化せず、従って被処理水の成分を分析する必
要もない。EFFECTS OF THE INVENTION Since the flocculant of the present invention is composed of a plurality of inorganic compounds containing calcium oxide as a main component as described above, there is no possibility of adversely affecting the environment even if used in a large amount. Moreover, it has an excellent aggregation effect.
As a result, transparent and neutral treated water is obtained. Furthermore, the aggregating ability does not change depending on the proportion of clay components in the water to be treated, and therefore it is not necessary to analyze the components of the water to be treated.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 後藤 憲二 大阪市都島区東野田町３丁目１番８号 ク リエンス工業株式会社内 (72)発明者 安藤 義市 大阪市都島区東野田町３丁目１番８号 ク リエンス工業株式会社内 (72)発明者 野田 文久 大阪市都島区片町１丁目１番37号 野田興 業株式会社内 (72)発明者 大石 正宏 大阪市都島区片町１丁目１番37号 野田興 業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenji Goto, 3-18, Higashi-Noda-cho, Miyakojima-ku, Osaka-shi Within Crience Industry Co., Ltd. (72) 3--18, Higashi-Noda-cho, Miyakojima-ku, Osaka No. Crience Industry Co., Ltd. (72) Fumihisa Noda 1-37 Katamachi, Miyakojima-ku, Osaka Noda Kogyo Co., Ltd. (72) Masahiro Oishi 1-31 Katamachi, Miyakojima-ku, Osaka Noda Within Kogyo Co., Ltd.
Claims (1)
無機化合物によって構成されていることを特徴とする凝
集剤。1. An aggregating agent comprising calcium oxide as a main component and a plurality of inorganic compounds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6804493A JPH06339602A (en) | 1993-03-26 | 1993-03-26 | Flocculating agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6804493A JPH06339602A (en) | 1993-03-26 | 1993-03-26 | Flocculating agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06339602A true JPH06339602A (en) | 1994-12-13 |
Family
ID=13362409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6804493A Pending JPH06339602A (en) | 1993-03-26 | 1993-03-26 | Flocculating agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06339602A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5624627A (en) * | 1991-12-27 | 1997-04-29 | Mitsui Petrochemical Industries, Ltd. | Process for preparing surface-modified biaxially oriented film of high molecular weight polyethylene |
-
1993
- 1993-03-26 JP JP6804493A patent/JPH06339602A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5624627A (en) * | 1991-12-27 | 1997-04-29 | Mitsui Petrochemical Industries, Ltd. | Process for preparing surface-modified biaxially oriented film of high molecular weight polyethylene |
| US5650451A (en) * | 1991-12-27 | 1997-07-22 | Mitsui Petrochemical Industries, Ltd. | Biaxially oriented film of high molecular weight polyethylene, process for preparing the same, surface modified biaxially oriented film of high molecular weight polyethylene and process for preparing the same |
| US5674919A (en) * | 1991-12-27 | 1997-10-07 | Mitsui Petrochemical Industries, Ltd. | Biaxially oriented film of high molecular weight polyethylene, process for preparing the same, surface-modified biaxially oriented film of high molecular weight polyethylene and process for preparing the same |
| US5840235A (en) * | 1991-12-27 | 1998-11-24 | Mitsui Petrochemical Industries, Ltd. | Biaxially oriented film of high molecular weight polyethylene, process for preparing the same, surface-modified biaxially oriented film of high molecular weight polyethylene and process for preparing the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gregory et al. | Hydrolyzing metal salts as coagulants | |
| JP4183741B1 (en) | Adsorption / coagulation wastewater treatment agent | |
| US3388060A (en) | Process and composition for purification of water supplies and aqueous wastes | |
| US3276998A (en) | Process of clarifying a liquid suspension of finely divided solids | |
| KR101965898B1 (en) | Preparation methods of organic and inorganic complex flocculants for waste waters | |
| US2862880A (en) | Method of clarifying water by hydrophobic polyamines | |
| JP4272122B2 (en) | Coagulated water treatment method and apparatus | |
| KR20010105510A (en) | Method for treating waste water with steel slag | |
| CN1032744C (en) | Method for clarifying tailing water | |
| CN110357393A (en) | A kind of nano flocculant and preparation method for sludge settling | |
| JPH06339602A (en) | Flocculating agent | |
| KR100374148B1 (en) | Treatment of wastewater generated in the paper preparation process | |
| KR101088148B1 (en) | Water treatment method using electric neutralization rate control of colloidal particles | |
| JP2003245504A (en) | Method and device for treating wastewater | |
| JP2003145168A (en) | Flocculation and solid-liquid separation method for aqueous suspension and apparatus adapted thereto | |
| JP2732067B2 (en) | Coagulant for water treatment | |
| JP3345670B2 (en) | Flocculant for wastewater treatment | |
| KR20090015689A (en) | Water treatment method by mixing input of flocculant with different basicity | |
| JP7117101B2 (en) | Water treatment method and device | |
| JPH0910508A (en) | Meat and fish processing wastewater treatment agent and treatment method | |
| JP2004154684A (en) | Coagulating sedimentation agent and coagulating sedimentation treatment method | |
| JP4630776B2 (en) | Water purification agent and water purification method | |
| JP3173981B2 (en) | Waste liquid treatment method | |
| Krupińska | Impact of polyelectrolytes on the effectiveness of treatment of groundwater with increased natural organic matter content | |
| JPH0938414A (en) | Coagulating sedimentation agent |