JPS63205198A - Deodorant - Google Patents
DeodorantInfo
- Publication number
- JPS63205198A JPS63205198A JP62035681A JP3568187A JPS63205198A JP S63205198 A JPS63205198 A JP S63205198A JP 62035681 A JP62035681 A JP 62035681A JP 3568187 A JP3568187 A JP 3568187A JP S63205198 A JPS63205198 A JP S63205198A
- Authority
- JP
- Japan
- Prior art keywords
- zinc
- sulfate
- basicity
- iron
- hydrogen sulfide
- 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
- 239000002781 deodorant agent Substances 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052742 iron Inorganic materials 0.000 claims abstract description 15
- 239000011701 zinc Substances 0.000 claims abstract description 13
- 230000001877 deodorizing effect Effects 0.000 claims abstract description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 abstract description 12
- 229910000037 hydrogen sulfide Inorganic materials 0.000 abstract description 12
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 abstract description 6
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 abstract description 6
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 abstract description 5
- 229910000368 zinc sulfate Inorganic materials 0.000 abstract description 5
- 229960001763 zinc sulfate Drugs 0.000 abstract description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract description 4
- 150000003752 zinc compounds Chemical class 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 239000011592 zinc chloride Substances 0.000 abstract description 3
- 235000005074 zinc chloride Nutrition 0.000 abstract description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 abstract description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 abstract description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 150000002505 iron Chemical class 0.000 abstract 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 150000002506 iron compounds Chemical class 0.000 description 4
- 235000019645 odor Nutrition 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 3
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- WQOXQRCZOLPYPM-UHFFFAOYSA-N dimethyl disulfide Chemical compound CSSC WQOXQRCZOLPYPM-UHFFFAOYSA-N 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- 239000011790 ferrous sulphate Substances 0.000 description 2
- 235000003891 ferrous sulphate Nutrition 0.000 description 2
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229960002089 ferrous chloride Drugs 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 1
- 159000000014 iron salts Chemical class 0.000 description 1
- 229910000358 iron sulfate Inorganic materials 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 239000004246 zinc acetate Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- ZPEJZWGMHAKWNL-UHFFFAOYSA-L zinc;oxalate Chemical compound [Zn+2].[O-]C(=O)C([O-])=O ZPEJZWGMHAKWNL-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、種々の排汚水等から発生する硫化水素、メチ
ールメル力ブタン、二硫化メチルなどの硫化物系の悪臭
およびアンモニア、アミン類などの悪臭金除去するため
の脱臭剤に関するものであって、亜鉛と３価の鉄とを主
成分とレ一定の組成を有するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention is a deodorizing method for removing sulfide-based bad odors such as hydrogen sulfide, methyl mer-butane, and methyl disulfide, and bad-smelling metals such as ammonia and amines generated from various wastewater. It relates to a chemical agent and has a certain composition with zinc and trivalent iron as the main ingredients.
従来の技術および問題点
従来、上記の悪臭を除去するための脱臭剤としては、■
活性炭、ゼオライトなどの吸着剤、■過酸化水素、次亜
塩素酸ソーダ、二酸化塩素などの酸化剤がほとんどであ
った。Conventional techniques and problems Conventionally, as deodorizing agents for removing the above-mentioned bad odors,
Most of them were adsorbents such as activated carbon and zeolite, and oxidizing agents such as hydrogen peroxide, sodium hypochlorite, and chlorine dioxide.
そして■のｇ＆着剤は吸着後の処理で悪臭が再発生する
欠点があり、■の酸化剤は処理費が高く、不安定であり
、かつ機器を腐食する欠点がある。Furthermore, the g&adhesive (2) has the disadvantage that a bad odor re-occurs during treatment after adsorption, and the oxidizing agent (2) has the disadvantages of high processing costs, instability, and corrosion of equipment.
最近これらの欠点のない脱臭剤としてＳＬ−アスコルビ
ン酸と２価の鉄化合物からなるものが提案されている（
特公昭６１−４３，０９１ ） Ｏ［、かしこの脱臭剤
は２価の鉄と還元剤であるし一アスコルビ／＃を含んで
いる念めに１使用後の排水のＣＯＤ値、ＢＯＤ値が高く
なり排水処理が困難になるし、また２価の鉄が溶解して
排液中に残留し、排水規制値をこえることもある。Recently, a deodorizer consisting of SL-ascorbic acid and a divalent iron compound has been proposed as a deodorizer that does not have these drawbacks (
(Special Publication No. 61-43, 091) O This makes wastewater treatment difficult, and divalent iron dissolves and remains in the wastewater, sometimes exceeding wastewater regulation values.
本発明者らは、さきに鉄系の新規物質であるポリ硫市鉄
溶液（特許第８４２０８５号）の製造法を提案した。The present inventors previously proposed a method for producing polysulfate iron solution (Patent No. 842085), which is a new iron-based substance.
この物質は、凝集剤としての性能にすぐれているが、脱
臭剤としても効力がある（ ＰＰＭ誌１９８６．２月号
、２８〜３３頁、紙パルプ技術協会第５３回研究発表会
）。しかし、これ単独では上記の亜臭成分の除去に十分
ではない。This substance has excellent performance as a flocculant, and is also effective as a deodorizing agent (PPM magazine, February 1986 issue, pages 28-33, 53rd Research Presentation of the Paper and Pulp Technology Association). However, this alone is not sufficient to remove the above-mentioned subodor components.
本発明者らは、従来の各種脱臭剤の欠点を考慮しつつ、
より効力のすぐれた脱臭剤の研究を重ねた結果Ｎつぎの
知見を得た。The present inventors took into account the shortcomings of various conventional deodorizers, and
As a result of repeated research into more effective deodorizing agents, the following knowledge was obtained.
（イ）３価の鉄が２価の鉄よりも硫化水素、メチールメ
ル力ブタンの除去にすぐれていること、仲）硫化水素の
除去はｐＨが高い程よいが−アンモニアの除去はｐＨが
低い程効果がよいこと、（ハ）硫酸亜鉛、硝酸亜鉛、塩
化亜鉛などの亜鉛化合物は硫化水素の除去能力が鉄化合
物よりすぐれていること、に）亜鉛化合物は３価の鉄化
合物より硫化水素の除去速度がはやいが持続性に欠けて
いること、（ホ）亜鉛化合物の方が鉄化合物よりも溶解
後のｐ）ｌが低下しない。(a) Trivalent iron is better at removing hydrogen sulfide and methyl butane than divalent iron, middle) Hydrogen sulfide removal is better at higher pH, but ammonia removal is more effective at lower pH. (c) Zinc compounds such as zinc sulfate, zinc nitrate, and zinc chloride have a better ability to remove hydrogen sulfide than iron compounds; and (c) Zinc compounds have a higher hydrogen sulfide removal rate than trivalent iron compounds. (v) Zinc compounds do not reduce p)l after dissolution more than iron compounds.
本発明は、上記の知見に基づくものであって１亜鉛と３
価の鉄を主成分とし、Ｚｎ／ｐ討のモル比が０．０１〜
１００で、かつ塩基度が２〜−１の組成からなることを
特徴とする脱臭剤である。The present invention is based on the above findings, and the present invention is based on the above findings.
The main component is valent iron, and the molar ratio of Zn/p is 0.01~
100 and a basicity of 2 to -1.
本発明は、亜鉛と３価の鉄とを主成分とするものであれ
ばこれ以外の不純分と七でチタン１銅−２価の鉄、マン
ガンなどの金属元素成分を含んでいても差支えない。In the present invention, as long as the main components are zinc and trivalent iron, there is no problem even if it contains other impurities and metallic element components such as titanium, monocopper, divalent iron, and manganese. .
本発明の脱臭剤における亜鉛成分の原料としては、硫酸
亜鉛、硝酸亜鉛、塩化亜鉛、酢酸亜鉛などの水溶性のも
のが好ましいが、酸化亜鉛、しゆう酸亜鉛などでもよい
。また３価の鉄（Ｆ二＋）成成の原料としては、ポリ硫
酸鉄、硫酸第２鉄−塩化第２鉄１硝酸第２鉄−酢醗第２
鉄などの他に硫酸第１鉄、塩化第１鉄などの２価の鉄塩
を酸化したものを用いることができる。つぎにＺｎ／Ｆ
二十のモル比を０．０１〜１００としたのは、０．０１
以下では亜鉛成分の効果がなく’５１００以上では３価
の鉄の効果がなくなるためである。第１表に、硫化水素
とメチールメル力ブタンを含んでいる汚泥に、Ｚｎ／Ｆ
３＋のモル比が異なった脱臭剤を添加した時の効果を示
した。この結果によればＺｎ／Ｆ３＋のモル比が０．０
１以下では硫化水素の除去が悪＜ （ｌ Ｏｐｐｍ以上
）実用
（以 下 余 白）
が無理である。Ｚｎ／Ｆ３＋のモル比が２００以上では
添加後６日目の硫化水素の値は９００ ｐｐｍとなり、
その効能の持続性がないことが判る。従ってｚｎ／Ｆ３
＋ノモル比は０．０１〜１００．好ましくは０．１〜１
００となる。つぎに本発明における塩基度とは、本発明
の脱臭剤の一般式をＺｎＡ・（Ｆｅｗ （ＯＨ）ｒｎＡ
ｍ−ｎ〕ｘで表わし、この時のｎ値をいう（この一般そ
して本発明で塩基度を２〜−１としたのは一塩基度が２
以上では製品の安定性が悪く、溶液としては存在できな
いからであり、また塩基度が−１（遊離酸が存在する）
以下では酸性が強く硫化水素の除去率が著しく低下する
からである。また腐食も大きくなり機器の保守が負担と
なる。As the raw material for the zinc component in the deodorizer of the present invention, water-soluble materials such as zinc sulfate, zinc nitrate, zinc chloride, and zinc acetate are preferred, but zinc oxide, zinc oxalate, and the like may also be used. In addition, the raw materials for forming trivalent iron (F2+) include polyferrous sulfate, ferric sulfate - ferric chloride 1 ferric nitrate - vinegar 2
In addition to iron, oxidized divalent iron salts such as ferrous sulfate and ferrous chloride can be used. Next, Zn/F
The molar ratio of twenty is 0.01 to 100, which is 0.01
This is because the zinc component has no effect below, and the effect of trivalent iron disappears above '5100. Table 1 shows that Zn/F was added to sludge containing hydrogen sulfide and methyl butane.
The effect of adding deodorizers with different molar ratios of 3+ was shown. According to this result, the molar ratio of Zn/F3+ is 0.0
If it is less than 1, hydrogen sulfide removal is poor (1 Oppm or more) and it is impossible to put it into practical use (hereinafter referred to as the margin). When the Zn/F3+ molar ratio is 200 or more, the hydrogen sulfide value on the 6th day after addition is 900 ppm,
It turns out that its efficacy is not sustainable. Therefore zn/F3
+nomolar ratio is 0.01 to 100. Preferably 0.1-1
It becomes 00. Next, the basicity in the present invention refers to the general formula of the deodorizer of the present invention as ZnA・(Few (OH)rnA
m-n]x, and refers to the n value at this time (in general and in the present invention, the basicity is set from 2 to -1 when the basicity is 2).
This is because the stability of the product is poor and it cannot exist as a solution, and the basicity is -1 (free acid exists).
This is because the acidity below is strong and the removal rate of hydrogen sulfide is significantly reduced. Corrosion also increases, making equipment maintenance a burden.
本発明の脱臭剤を製造する方法としては、硫酸亜鉛とポ
リ硫鉄溶液を混合し一、 ＺＩｔ／ｐ七のモル比が０．
０１〜１００になるように調整し−これに必要に応じて
硫酸を添加して塩基度を調整してよく攪拌する。また硫
酸亜鉛と硫酸第１鉄をｚｎ／Ｆｅのモル比が０．０１〜
１００で、鉄の濃度が４０１４以上になるように混合し
、かつ塩基度が１〜−１になるように硫酸で調製し、こ
れを醸化してＦ％＋がＦ討になるようにして製造する。The method for producing the deodorizing agent of the present invention involves mixing zinc sulfate and polyferric sulfate solution, and adjusting the molar ratio of ZIt/p to 0.
The basicity is adjusted to 0.01 to 100% by adding sulfuric acid as needed to adjust the basicity, and the mixture is thoroughly stirred. In addition, zinc sulfate and ferrous sulfate are used at a zn/Fe molar ratio of 0.01 to
100, mixed so that the iron concentration is 4014 or more, and prepared with sulfuric acid so that the basicity is 1 to -1, and then fermented so that F%+ becomes F%. do.
実施列
製紙工場の排水を処理して凝集法でんした汚泥（ｐＨ５
，５、Ｈ２Ｓ ９００ ｐｐｍ ｓ汚泥濃度２．３％＞
］ｔを容器にとり、ポリ硫酸鉄溶液、硫酸鉄、Ｌ−ア：
１のもの）をそれぞれ０．６ ｍｍｏｔ（金属イオンの
全モルとして）加えて密栓し３分間伽とうした後に測定
した。また同様に処理したものを５日後に測定した。そ
の結果を第２表に示す。Sludge (pH 5
, 5, H2S 900 ppm s sludge concentration 2.3%>
]T in a container, polyferric sulfate solution, iron sulfate, L-A:
1) was added thereto in an amount of 0.6 mmot (as total moles of metal ions), the tubes were sealed tightly, and the samples were allowed to stand for 3 minutes before measurement. In addition, samples treated in the same manner were measured after 5 days. The results are shown in Table 2.
２．７ニコ：レーアスコルビンｍｎｃｎ）発明の効果
本発明によれば、硫化水素、メチールメル力ブタンの除
去効果が大で、かつその効能の持続性が大である。そし
て、悪臭の゛再発生や機器の腐食がないので、実用土の
価値は大である。2.7 Nico: Rhaecorbin mncn) Effects of the Invention According to the present invention, the removal effect of hydrogen sulfide and methyl butane is great, and the effectiveness is long lasting. Moreover, since there is no recurrence of bad odors or corrosion of equipment, the value of practical soil is great.
Claims (1)
モル比が０．０１〜１００で、かつ塩基度が２〜−１の
組成からなることを特徴とする脱臭剤。A deodorizing agent characterized by having a composition containing zinc and trivalent iron as main components, a Zn/Fe^3^+ molar ratio of 0.01 to 100, and a basicity of 2 to -1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62035681A JPS63205198A (en) | 1987-02-20 | 1987-02-20 | Deodorant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62035681A JPS63205198A (en) | 1987-02-20 | 1987-02-20 | Deodorant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63205198A true JPS63205198A (en) | 1988-08-24 |
| JPH0356798B2 JPH0356798B2 (en) | 1991-08-29 |
Family
ID=12448628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62035681A Granted JPS63205198A (en) | 1987-02-20 | 1987-02-20 | Deodorant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63205198A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03174215A (en) * | 1989-09-15 | 1991-07-29 | E I Du Pont De Nemours & Co | Improved method of controlling offensive smell |
| JPH07148482A (en) * | 1993-11-29 | 1995-06-13 | Hidekazu Murotani | Method and apparatus for controlling hydrogen sulfide in waste water chemical injection |
| CN103333715A (en) * | 2013-07-16 | 2013-10-02 | 湖南大学 | Method for removing hydrogen sulfide in catalytic cracking dry gas |
| WO2014007391A1 (en) * | 2012-07-06 | 2014-01-09 | 帝人デュポンフィルム株式会社 | White reflective film |
-
1987
- 1987-02-20 JP JP62035681A patent/JPS63205198A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03174215A (en) * | 1989-09-15 | 1991-07-29 | E I Du Pont De Nemours & Co | Improved method of controlling offensive smell |
| JPH07148482A (en) * | 1993-11-29 | 1995-06-13 | Hidekazu Murotani | Method and apparatus for controlling hydrogen sulfide in waste water chemical injection |
| WO2014007391A1 (en) * | 2012-07-06 | 2014-01-09 | 帝人デュポンフィルム株式会社 | White reflective film |
| CN103333715A (en) * | 2013-07-16 | 2013-10-02 | 湖南大学 | Method for removing hydrogen sulfide in catalytic cracking dry gas |
| CN103333715B (en) * | 2013-07-16 | 2015-03-18 | 湖南大学 | Method for removing hydrogen sulfide in catalytic cracking dry gas |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0356798B2 (en) | 1991-08-29 |
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