JP2001049235A - Heavy metal sequestrant - Google Patents
Heavy metal sequestrantInfo
- Publication number
- JP2001049235A JP2001049235A JP11229897A JP22989799A JP2001049235A JP 2001049235 A JP2001049235 A JP 2001049235A JP 11229897 A JP11229897 A JP 11229897A JP 22989799 A JP22989799 A JP 22989799A JP 2001049235 A JP2001049235 A JP 2001049235A
- Authority
- JP
- Japan
- Prior art keywords
- heavy metal
- water
- sequestrant
- metal fixing
- tartrate
- 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
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ジエチルジチオカ
ルバミン酸塩等の重金属固定成分と酒石酸ナトリウム等
の酒石酸塩とを含有する重金属固定剤やそれを水性溶媒
中に溶解した状態で用いる重金属の固定方法に関する。The present invention relates to a heavy metal fixing agent containing a heavy metal fixing component such as diethyl dithiocarbamate and a tartrate such as sodium tartrate, and a method for fixing a heavy metal using the same in a state of being dissolved in an aqueous solvent. About.
【０００２】[0002]
【従来の技術】産業廃水や各種排水等に含まれる重金属
類は程度の差こそあれ有害なものが多く、重金属類のう
ち水銀、カドミウム、砒素、鉛、６価クロム、及びセレ
ンが規制の対象となっており、これら人体に有害な重金
属は、河川や海を汚染して重大な環境問題を引き起こす
おそれがある。また、鉱山から排出される鉱滓、ゴミ焼
却場の焼却灰、廃水処理場等における使用済の汚泥、工
場跡地等の汚染された土壌等に含まれる重金属類も、河
川や海等に溶出して二次公害を引き起こすおそれが指摘
されている。このため、重金属類を含む工場廃水等の廃
水や、鉱滓、焼却灰、汚泥、土壌等の固体状廃棄物の処
理に際しては、特に厳しい規制が設けられている。2. Description of the Related Art Heavy metals contained in industrial wastewater and various wastewaters are harmful to some extent, and mercury, cadmium, arsenic, lead, hexavalent chromium, and selenium are subject to regulation among heavy metals. Heavy metals that are harmful to the human body can pollute rivers and seas and cause serious environmental problems. In addition, slag discharged from mines, incinerated ash from garbage incineration plants, used sludge at wastewater treatment plants, heavy metals contained in contaminated soil such as factory sites, etc. also elute into rivers and the sea. It has been pointed out that secondary pollution may occur. For this reason, particularly strict regulations are set when treating wastewater such as industrial wastewater containing heavy metals, or solid waste such as slag, incineration ash, sludge, soil and the like.
【０００３】従来、これら鉛等の重金属類含有廃排水等
の処理法としては、消石灰などのアルカリを添加して金
属イオンを水酸化物にし、高分子凝集剤などを加えて凝
集沈殿させる水酸化物凝集沈殿方法や、重金属を水酸化
物や硫化物として不溶化後、これらの懸濁粒子を浮上さ
せて分離する沈殿浮選法や、ジエチルジチオカルバミン
酸塩等の重金属固定成分を用いて、重金属を不溶性錯体
として固定処理する金属固定剤を用いる方法等が知られ
ている。この金属固定剤を用いる処理方法は、廃排水に
金属固定剤の水溶液を添加し、金属固定剤が廃排水中の
金属を固定して生成した不溶性金属錯体のフロックを沈
殿除去したり、また固体廃棄物に金属固定剤の水溶液を
添加・混練し、その中に含まれる重金属を金属固定剤に
固定させて不溶化金属錯体として分離除去する方法とし
て知られている。Conventionally, as a method for treating waste water containing heavy metals such as lead, alkali such as slaked lime is added to convert metal ions to hydroxide, and a polymer flocculant is added to form a hydroxide to form a hydroxide. The method of coagulation and sedimentation, the method of insolubilizing heavy metals as hydroxides and sulfides, the sedimentation flotation method of floating and separating these suspended particles, and the use of heavy metal fixing components such as diethyldithiocarbamate to remove heavy metals A method using a metal fixing agent to be fixed as an insoluble complex is known. This treatment method using a metal fixing agent involves adding an aqueous solution of a metal fixing agent to wastewater, and precipitating and removing flocs of insoluble metal complexes generated by the metal fixing agent fixing metals in the wastewater, There is known a method in which an aqueous solution of a metal fixing agent is added to and kneaded with waste, and heavy metals contained therein are fixed to the metal fixing agent and separated and removed as an insolubilized metal complex.
【０００４】また従来、特開平９−２６８２７９号公報
に記載されているように、上記金属固定剤を用いる重金
属の処理に際して、金属固定剤水溶液を廃排水や固体破
棄物に添加する薬注ポンプや配管のカルシウムスケール
等による閉塞を防止するために、金属と結合して不溶性
の金属錯体を形成するが、それ自身は水溶性又は水分散
性を有するジエチルジチオカルバミン酸塩等の重金属固
定成分と、カルシウム、マグネシウム等の硬度成分と結
合して水溶性の金属錯体を形成する水溶性金属錯体形成
剤とを含む金属固定剤が知られており、水溶性金属錯体
形成剤としてＥＤＴＡやポリカルボン酸類やリン酸類を
用いることができることも知られている。[0004] Conventionally, as described in Japanese Patent Application Laid-Open No. 9-268279, a chemical injection pump for adding an aqueous solution of a metal fixing agent to wastewater or solid waste during treatment of heavy metals using the metal fixing agent has been proposed. In order to prevent the pipe from being blocked by calcium scale or the like, it binds to a metal to form an insoluble metal complex, but itself has a water-soluble or water-dispersible heavy metal fixing component such as diethyldithiocarbamate, and calcium. And a water-soluble metal complex-forming agent that forms a water-soluble metal complex by combining with a hardness component such as magnesium or the like. Known metal fixing agents include EDTA, polycarboxylic acids, and phosphorus as water-soluble metal complex-forming agents. It is also known that acids can be used.
【０００５】[0005]
【発明が解決しようとする課題】上記のように、重金属
と反応して不溶性の金属錯体を形成し得る重金属固定成
分を水溶液の形態で添加し、廃水や固体廃棄物中の重金
属を不溶性金属錯体として固定処理するに際し、重金属
固定成分の希釈水として二次排水等カルシウム等の硬度
成分含有水が用いられることが多く、かかる場合、薬剤
溶解槽の薬注ポンプや配管にスケールが付着し、配管等
を閉塞させるおそれがあり、また、ジエチルジチオカル
バミン酸塩等の重金属固定成分の水溶液は一般にアルカ
リ性であるため、酸性物質を使用すると、その反応によ
りジエチルジチオカルバミン酸塩が分解するという問題
があった。As described above, a heavy metal fixing component capable of reacting with a heavy metal to form an insoluble metal complex is added in the form of an aqueous solution, and the heavy metal in wastewater or solid waste is converted into an insoluble metal complex. In the case of fixing treatment, water containing a hard component such as calcium such as secondary wastewater is often used as dilution water for heavy metal fixing components. In such a case, scale adheres to a chemical injection pump or a pipe of a chemical dissolution tank, and In addition, there is a problem that an aqueous solution of a heavy metal fixing component such as diethyldithiocarbamate is generally alkaline. Therefore, when an acidic substance is used, the reaction thereof decomposes diethyldithiocarbamate.
【０００６】本発明の課題は、重金属固定成分の重金属
固定能を低下させることがなく、かつ重金属固定成分の
希釈水溶液中に生成するスケールの発生を防止すること
ができ、スケールによる薬注ポンプや配管等の閉塞及び
腐食を実質的に完全に防止することができる重金属固定
剤を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to prevent the generation of scale generated in a diluted aqueous solution of a heavy metal fixing component without reducing the heavy metal fixing ability of the heavy metal fixing component. An object of the present invention is to provide a heavy metal fixing agent capable of substantially completely preventing clogging and corrosion of pipes and the like.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、上記課題
を解決するために、重金属固定成分としてよく知られて
いるジエチルジチオカルバミン酸塩と併用して、ジエチ
ルジチオカルバミン酸塩の希釈水中に含まれるカルシウ
ム等の硬度成分によるスケールの発生を防止しうる成分
を見い出すべく、多数の被検化合物について鋭意検討し
たところ、酒石酸ナトリウムが他の有機酸塩やポリマー
類等に比べて、極めて優れたスケール防止作用を有する
ことを見い出し、本発明を完成するに至った。Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors used diethyl dithiocarbamate, which is well-known as a heavy metal fixing component, in a mixture of diethyl dithiocarbamate in diluted water. In order to find a component that can prevent the generation of scale due to hardness components such as calcium, a lot of test compounds have been studied diligently, and sodium tartrate has an extremely excellent scale compared to other organic acid salts and polymers. They have found that they have a preventive action, and have completed the present invention.
【０００８】すなわち本発明は、不溶性の金属錯体形成
能を有する水溶性又は水分散性重金属固定成分と酒石酸
塩とを含有することを特徴とする重金属固定剤（請求項
１）や、不溶性の金属錯体形成能を有する水溶性又は水
分散性重金属固定成分と酒石酸塩とを水性溶媒中に溶解
してなることを特徴とする重金属固定剤（請求項２）
や、重金属固定成分が、ジエチルジチオカルバミン酸塩
であることを特徴とする請求項１または２記載の重金属
固定剤（請求項３）や、及び酒石酸塩が、酒石酸ナトリ
ウムであることを特徴とする請求項１〜３のいずれか記
載の重金属固定剤（請求項４）に関する。That is, the present invention provides a heavy metal fixing agent comprising a water-soluble or water-dispersible heavy metal fixing component having an insoluble metal complex-forming ability and a tartrate (claim 1); A heavy metal fixing agent obtained by dissolving a water-soluble or water-dispersible heavy metal fixing component having a complex forming ability and a tartrate salt in an aqueous solvent (Claim 2).
The heavy metal fixing component is diethyl dithiocarbamate, and the heavy metal fixing agent according to claim 1 or claim 2 and the tartrate are sodium tartrate. A heavy metal fixing agent according to any one of Items 1 to 3 (Claim 4).
【０００９】また本発明は、不溶性の金属錯体形成能を
有する水溶性又は水分散性重金属固定成分と酒石酸塩と
を水性溶媒中に溶解した状態で用いることを特徴とする
重金属の固定方法（請求項５）や、重金属固定成分が、
ジエチルジチオカルバミン酸塩であることを特徴とする
請求項５記載の重金属の固定方法（請求項６）や、酒石
酸塩が、酒石酸ナトリウムであることを特徴とする請求
項５又は６記載の重金属の固定方法（請求項７）に関す
る。Further, the present invention provides a method for fixing a heavy metal, comprising using a water-soluble or water-dispersible heavy metal-fixing component having an insoluble metal complex-forming ability and a tartrate dissolved in an aqueous solvent. Item 5) and the heavy metal fixed component,
7. The method for immobilizing heavy metals according to claim 5, which is diethyl dithiocarbamate (claim 6), and the immobilization of heavy metals according to claim 5 or 6, wherein the tartrate is sodium tartrate. A method (claim 7).
【００１０】[0010]
【発明の実施の形態】本発明の重金属固定剤は、不溶性
の金属錯体形成能を有する水溶性又は水分散性重金属固
定成分と酒石酸塩とを、含有するあるいは水性溶媒中に
溶解してなることを特徴とし、また本発明の重金属の固
定方法は、不溶性の金属錯体形成能を有する水溶性又は
水分散性重金属固定成分と酒石酸塩とを水性溶媒中に溶
解した状態で用いることを特徴とする。BEST MODE FOR CARRYING OUT THE INVENTION The heavy metal fixing agent of the present invention contains a water-soluble or water-dispersible heavy metal fixing component having an insoluble metal complex-forming ability and a tartrate salt or is dissolved in an aqueous solvent. The method of fixing a heavy metal according to the present invention is characterized in that a water-soluble or water-dispersible heavy metal fixing component having an insoluble metal complex-forming ability and a tartrate salt are used in a dissolved state in an aqueous solvent. .
【００１１】本発明の重金属固定成分としては、重金属
と結合することにより不溶性の金属錯体を形成する水溶
性又は水分散性の化合物であればどのようなものでもよ
く、かかる重金属固定成分としては、ジメチルジチオカ
ルバミン酸のアルカリ金属塩、アルカリ土類金属塩、ア
ンモニウム塩などの他、従来より廃水処理や固体廃棄物
処理に用いられている、例えば、前記特開平９−２６８
２７９号公報に“不溶性金属錯体形成剤”として例示さ
れているアミンやイミン等の窒素原子に官能基を有する
化合物を挙げることができる。上記アルカリ金属として
は、リチウム、ナトリウム、カリウム等が、アルカリ土
類金属としては、カルシウム、マグネシウム等を挙げる
ことができる。The heavy metal-fixing component of the present invention may be any water-soluble or water-dispersible compound which forms an insoluble metal complex by binding to a heavy metal. In addition to alkali metal salts, alkaline earth metal salts, ammonium salts and the like of dimethyldithiocarbamic acid, conventionally used in wastewater treatment and solid waste treatment, for example, the above-mentioned JP-A-9-268.
Compounds having a functional group at a nitrogen atom, such as amines and imines, which are exemplified as "insoluble metal complex-forming agents" in JP-A-279-279 can be mentioned. Examples of the alkali metal include lithium, sodium, and potassium, and examples of the alkaline earth metal include calcium and magnesium.
【００１２】本発明の重金属固定剤には、上記の不溶性
の金属錯体形成能を有する水溶性又は水分散性重金属固
定成分と酒石酸塩とを含有する固状タイプの重金属固定
剤と、不溶性の金属錯体形成能を有する水溶性又は水分
散性重金属固定成分と酒石酸塩とを水性溶媒中に溶解し
てなる液状タイプの重金属固定剤があり、重金属固定成
分と共にこれら本発明の重金属固定剤を構成する酒石酸
塩としては、酒石酸ナトリウム、酒石酸水素ナトリウ
ム、酒石酸カリウム等を挙げることができる。そして、
本発明の重金属固定剤を構成する重金属固定成分と酒石
酸塩との配合割合としては特に限定されるものではない
が、酒石酸塩を重金属固定成分に対して０．０１〜１０
重量％、特に０．１〜２．５重量％の範囲となるように
配合することが好ましい。The heavy metal fixing agent of the present invention includes a solid type heavy metal fixing agent containing the above-described water-soluble or water-dispersible heavy metal fixing component having a capability of forming an insoluble metal complex and tartrate; There is a liquid-type heavy metal fixing agent obtained by dissolving a water-soluble or water-dispersible heavy metal fixing component having a complex forming ability and a tartrate salt in an aqueous solvent, and together with the heavy metal fixing component, constitutes the heavy metal fixing agent of the present invention. Examples of the tartrate include sodium tartrate, sodium hydrogen tartrate, potassium tartrate and the like. And
The mixing ratio of the heavy metal fixing component and the tartrate constituting the heavy metal fixing agent of the present invention is not particularly limited.
% By weight, particularly 0.1 to 2.5% by weight.
【００１３】本発明の固状タイプの重金属固定剤は、粉
末状の重金属固定成分と酒石酸塩とを混合した粉末状重
金属固定剤組成物として、あらかじめ顆粒状とした重金
属固定成分と酒石酸塩とを混合した顆粒状重金属固定剤
組成物として、あるいは、これらを加圧成形等により成
形した重金属固定剤成形体として使用することができ
る。また、本発明の液状タイプの重金属固定剤は、上記
固状タイプの重金属固定剤等の重金属固定成分と酒石酸
塩とを予め混合したものを、水性溶媒に溶解して調製す
ることもできるが、重金属固定成分及び酒石酸塩のいず
れか一方の水溶液をあらかじめ調製しておき、これに他
方の水溶液を混合することによっても調製することがで
きる。The solid-type heavy metal fixing agent of the present invention is a powdered heavy metal fixing agent composition obtained by mixing a powdered heavy metal fixing component and a tartrate, and comprises a granulated heavy metal fixing component and a tartrate. It can be used as a mixed granular heavy metal fixing agent composition, or as a heavy metal fixing agent molded article obtained by molding them by pressure molding or the like. Further, the liquid type heavy metal fixing agent of the present invention can be prepared by dissolving a heavy metal fixing component such as the solid type heavy metal fixing agent and a tartrate in advance in an aqueous solvent, It can also be prepared by preparing an aqueous solution of one of the heavy metal fixing component and the tartrate in advance, and mixing the aqueous solution with the other.
【００１４】本発明の重金属固定剤を用いて廃排水等を
処理する場合には、不溶性の金属錯体形成能を有する水
溶性又は水分散性重金属固定成分と酒石酸塩とを水性溶
媒中に溶解した状態で通常用いられる。例えば、廃排水
中に本発明の重金属固定剤の水溶液を添加すると、本発
明の重金属固定剤中の重金属固定成分が廃排水中の重金
属を捕集・固定してフロックが生成し、生成したフロッ
クは沈殿濾過され、濾過分離後の廃排水は河川等に放流
されることになる。また、固体廃棄物を処理する場合に
は、液体状態の本発明の重金属固定剤と固体廃棄物とを
接触させることにより、固体廃棄物中の重金属を固定化
することができる。In the case of treating waste water and the like using the heavy metal fixing agent of the present invention, a water-soluble or water-dispersible heavy metal fixing component having an insoluble metal complex-forming ability and a tartrate are dissolved in an aqueous solvent. Usually used in the state. For example, when an aqueous solution of the heavy metal fixing agent of the present invention is added to wastewater, the heavy metal fixing component in the heavy metal fixing agent of the present invention collects and fixes the heavy metals in the wastewater, and flocs are generated. Is subjected to sedimentation filtration, and the wastewater after filtration and separation is discharged to rivers and the like. When treating solid waste, the heavy metal in the solid waste can be immobilized by contacting the solid waste with the heavy metal fixing agent of the present invention in a liquid state.
【００１５】本発明の重金属固定剤は、重金属類のうち
特に水銀、カドミウム、砒素、鉛、６価クロム、セレ
ン、銅、亜鉛、マンガン、鉄等、及びこれら重金属の化
合物の捕集・固定性能に優れ、本発明の重金属固定剤
は、これら重金属を含む廃水、排水、廃ガス、固体廃棄
物の処理に有利に用いることができる。The heavy metal fixing agent of the present invention is capable of collecting and fixing heavy metals, especially mercury, cadmium, arsenic, lead, hexavalent chromium, selenium, copper, zinc, manganese, iron, etc., and compounds of these heavy metals. The heavy metal fixing agent of the present invention can be advantageously used for treating wastewater, wastewater, waste gas and solid waste containing these heavy metals.
【００１６】[0016]
【実施例】次に実施例により本発明を更に詳細に説明す
るが、本発明の技術的範囲はこれら実施例によって限定
されるものではない。 実施例 炭酸カルシウム沈殿生成抑制化合物のスクリーニングを
行った。 （実験方法）不溶性の金属錯体形成能を有する水溶性又
は水分散性重金属固定成分としてジエチルジチオカルバ
ミン酸カリウムを用いた。５０ｍｌのフタ付き容器に、
各種カルボン酸等の表１に示す８種の被検物質を所定量
（ジエチルジチオカルバミン酸カリウムに対して０．１
〜２．５重量％）、ジエチルジチオカルバミン酸カリウ
ムを４．９５ｇ及び精製水を０．８７ｍｌ入れて混合し
た。次いで、再利用水（カルシウム濃度２２０ｐｐｍ）
を４５ｍｌ加えて混合し、一晩室温で放置後、メンブラ
ンフィルター（ＡＤＶＡＮＴＥＣ社製「ＰＴＦＥ」、
０．５μｍ）で濾過した。次いで、濾液中のカルシウム
濃度をＩＣＰ（高周波誘導結合プラズマ発光分光分析装
置）で測定した。結果を表１に示す。Next, the present invention will be described in more detail by way of examples, but the technical scope of the present invention is not limited by these examples. Example A compound for inhibiting the formation of calcium carbonate precipitation was screened. (Experimental method) Potassium diethyldithiocarbamate was used as a water-soluble or water-dispersible heavy metal fixing component having an insoluble metal complex-forming ability. In a 50ml container with a lid,
Eight kinds of test substances shown in Table 1, such as various carboxylic acids, were added in predetermined amounts (0.1 to potassium diethyldithiocarbamate).
-2.5% by weight), 4.95 g of potassium diethyldithiocarbamate and 0.87 ml of purified water were mixed. Next, reuse water (calcium concentration 220ppm)
Was added and mixed at room temperature overnight, followed by a membrane filter (“PTFE” manufactured by ADVANTEC, Inc.).
0.5 μm). Next, the calcium concentration in the filtrate was measured by ICP (high frequency inductively coupled plasma emission spectrometer). Table 1 shows the results.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【発明の効果】本発明の重金属固定剤を用いると、ジエ
チルジチオカルバミン酸塩などの重金属固定成分が本来
もつ、優れた重金属固定化能を阻害することなく、又添
加によりそれらを分解することなく水溶液中のカルシウ
ム成分を選択的に捕定することによって、重金属固定剤
水溶液中にカルシウムスケール等の沈殿物の生成が大幅
に抑制され、重金属固定剤水溶液を廃排水や固体状廃棄
物等に添加するための薬注ポンプや配管が閉塞するおそ
れがない。EFFECTS OF THE INVENTION The use of the heavy metal fixing agent of the present invention can be carried out without disturbing the excellent heavy metal fixing ability inherent in heavy metal fixing components such as diethyldithiocarbamate, and without decomposing them by addition. By selectively trapping the calcium component in the solution, the formation of precipitates such as calcium scale in the aqueous solution of the heavy metal fixing agent is greatly suppressed, and the aqueous solution of the heavy metal fixing agent is added to wastewater or solid waste. There is no risk of clogging pumps and pipes being blocked.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 古本 勝三 千葉県市原市五井南海岸12−54 日本曹達 株式会社機能製品研究所内 (72)発明者 川向 茂 千葉県市原市五井南海岸12−54 日本曹達 株式会社機能製品研究所内 Ｆターム(参考） 4G066 AB07A AB07B AB09A AB09B AB16A AB16B AB24A AB24B AD03A AD03B AD06A AD06B AD11A AD11B CA46 CA47 CA50 DA08 EA13 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Katsuzo Furumoto 12-54 Goi-minamikaigan, Ichihara-shi, Chiba Japan Nippon Soda Co., Ltd. Soda Co., Ltd. Functional Products Laboratory F-term (reference) 4G066 AB07A AB07B AB09A AB09B AB16A AB16B AB24A AB24B AD03A AD03B AD06A AD06B AD11A AD11B CA46 CA47 CA50 DA08 EA13
Claims (7)
又は水分散性重金属固定成分と酒石酸塩とを含有するこ
とを特徴とする重金属固定剤。1. A heavy metal fixing agent comprising a water-soluble or water-dispersible heavy metal fixing component having an insoluble metal complex-forming ability and a tartrate salt.
又は水分散性重金属固定成分と酒石酸塩とを水性溶媒中
に溶解してなることを特徴とする重金属固定剤。2. A heavy metal fixing agent comprising a water-soluble or water-dispersible heavy metal fixing component having an insoluble metal complex-forming ability and a tartrate dissolved in an aqueous solvent.
バミン酸塩であることを特徴とする請求項１または２記
載の重金属固定剤。3. The heavy metal fixing agent according to claim 1, wherein the heavy metal fixing component is diethyl dithiocarbamate.
とを特徴とする請求項１〜３のいずれか記載の重金属固
定剤。4. The heavy metal fixing agent according to claim 1, wherein the tartrate salt is sodium tartrate.
又は水分散性重金属固定成分と酒石酸塩とを水性溶媒中
に溶解した状態で用いることを特徴とする重金属の固定
方法。5. A method for fixing a heavy metal, comprising using a water-soluble or water-dispersible heavy metal-fixing component having an insoluble metal complex-forming ability and a tartrate dissolved in an aqueous solvent.
バミン酸塩であることを特徴とする請求項５記載の重金
属の固定方法。6. The method for fixing a heavy metal according to claim 5, wherein the heavy metal fixing component is diethyl dithiocarbamate.
とを特徴とする請求項５又は６記載の重金属の固定方
法。7. The method according to claim 5, wherein the tartrate salt is sodium tartrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22989799A JP5101760B2 (en) | 1999-08-16 | 1999-08-16 | Heavy metal fixative |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22989799A JP5101760B2 (en) | 1999-08-16 | 1999-08-16 | Heavy metal fixative |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001049235A true JP2001049235A (en) | 2001-02-20 |
| JP5101760B2 JP5101760B2 (en) | 2012-12-19 |
Family
ID=16899450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22989799A Expired - Lifetime JP5101760B2 (en) | 1999-08-16 | 1999-08-16 | Heavy metal fixative |
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| Country | Link |
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| JP (1) | JP5101760B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007197607A (en) * | 2006-01-27 | 2007-08-09 | Kao Corp | Aqueous liquid detergent composition |
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|---|---|---|---|---|
| JPH04265220A (en) * | 1991-02-19 | 1992-09-21 | Tokuyama Soda Co Ltd | Method for recovering alkaline hydroxide |
| WO1996009902A1 (en) * | 1994-09-29 | 1996-04-04 | Kanegafuchi Kagaku Kogyo Kabushiki Kaisha | Waste treatment chemical and waste disposal method |
| JPH0957234A (en) * | 1995-08-28 | 1997-03-04 | Koyo Kasei Kk | Detoxicating method of waste |
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| JPH09122616A (en) * | 1995-11-07 | 1997-05-13 | Kanegafuchi Chem Ind Co Ltd | Treatment agent and treatment method for harmful waste |
| JPH09268279A (en) * | 1996-04-01 | 1997-10-14 | Miyoshi Oil & Fat Co Ltd | Metal scavenger |
| JPH1077261A (en) * | 1996-09-03 | 1998-03-24 | Nippon Soda Co Ltd | Highly concentrated aqueous dithiocarbamate solution and heavy metal fixing agent |
| JPH1076240A (en) * | 1996-09-03 | 1998-03-24 | Nippon Soda Co Ltd | Heavy metal fixing agent |
| JPH11114528A (en) * | 1997-10-15 | 1999-04-27 | Nippon Soda Co Ltd | Solid heavy metal fixing agent |
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1999
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04265220A (en) * | 1991-02-19 | 1992-09-21 | Tokuyama Soda Co Ltd | Method for recovering alkaline hydroxide |
| WO1996009902A1 (en) * | 1994-09-29 | 1996-04-04 | Kanegafuchi Kagaku Kogyo Kabushiki Kaisha | Waste treatment chemical and waste disposal method |
| JPH0995659A (en) * | 1995-07-25 | 1997-04-08 | Miyoshi Oil & Fat Co Ltd | Production of metal scavenger |
| JPH0957234A (en) * | 1995-08-28 | 1997-03-04 | Koyo Kasei Kk | Detoxicating method of waste |
| JPH09122616A (en) * | 1995-11-07 | 1997-05-13 | Kanegafuchi Chem Ind Co Ltd | Treatment agent and treatment method for harmful waste |
| JPH09268279A (en) * | 1996-04-01 | 1997-10-14 | Miyoshi Oil & Fat Co Ltd | Metal scavenger |
| JPH1077261A (en) * | 1996-09-03 | 1998-03-24 | Nippon Soda Co Ltd | Highly concentrated aqueous dithiocarbamate solution and heavy metal fixing agent |
| JPH1076240A (en) * | 1996-09-03 | 1998-03-24 | Nippon Soda Co Ltd | Heavy metal fixing agent |
| JPH11114528A (en) * | 1997-10-15 | 1999-04-27 | Nippon Soda Co Ltd | Solid heavy metal fixing agent |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007197607A (en) * | 2006-01-27 | 2007-08-09 | Kao Corp | Aqueous liquid detergent composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5101760B2 (en) | 2012-12-19 |
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