JPS6038341B2 - Method for reducing hexavalent chromium - Google Patents
Method for reducing hexavalent chromiumInfo
- Publication number
- JPS6038341B2 JPS6038341B2 JP1968181A JP1968181A JPS6038341B2 JP S6038341 B2 JPS6038341 B2 JP S6038341B2 JP 1968181 A JP1968181 A JP 1968181A JP 1968181 A JP1968181 A JP 1968181A JP S6038341 B2 JPS6038341 B2 JP S6038341B2
- Authority
- JP
- Japan
- Prior art keywords
- hexavalent chromium
- chromium
- waste oil
- oil shale
- reducing hexavalent
- 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.)
- Expired
Links
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 title claims description 11
- 238000000034 method Methods 0.000 title claims description 4
- 239000011651 chromium Substances 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 5
- 239000003929 acidic solution Substances 0.000 claims description 4
- 239000004058 oil shale Substances 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
Description
【発明の詳細な説明】
本発明は、オイルシヱールから合成石油を抽出した残澄
を利用して酸性溶液中の六価クロムを三価クロムに還元
する方法。DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for reducing hexavalent chromium in an acidic solution to trivalent chromium using the residual liquid obtained by extracting synthetic petroleum from oil shel.
一般に六価クロムを含む廃水は硫酸第一鉄その他の還元
剤で三価クロムに還元した後、中和剤で処理している。Generally, wastewater containing hexavalent chromium is reduced to trivalent chromium using ferrous sulfate or other reducing agents, and then treated with a neutralizing agent.
本法は、こ六価クロムの還元に廃オイルシェールを利用
するもので、次の特長がある。１ 六価クロムの還元は
ｐＨ約３．５以下の酸性溶液で行なわれ、酸濃度が高く
なるに従い還元速度も早くなる。This method uses waste oil shale to reduce hexavalent chromium, and has the following features: 1. Reduction of hexavalent chromium is carried out in an acidic solution with a pH of about 3.5 or less, and the rate of reduction increases as the acid concentration increases.
２ 反応は六価クロムを含む水溶液に廃オイルシェール
を添加し接触させると、比較的短時間で進行する。2. When waste oil shale is added to and brought into contact with an aqueous solution containing hexavalent chromium, the reaction proceeds in a relatively short time.
３ 廃オイルシェールを塩酸処理したものは、さらに還
元促進効果をもつようになる。3. Waste oil shale treated with hydrochloric acid has a further reduction promoting effect.
本発明に使用した廃オイルシヱールはタィ国及び米国産
オイルシェールを回分式レトルトを使用し、窒素をキャ
リャーガスとして５００肌／ｍｉｎ通気ごせながら、５
００〜６００ｏｏで乾留し、油を抽出したあとの残涜で
あり、これを−１００十２００メッシュに粒度を調整し
たものである。The waste oil shale used in the present invention was produced using oil shale from Thailand and the United States in a batch retort, and was aerated at 500 skins/min using nitrogen as a carrier gas.
This is the residue after carbonization at 00 to 600 oo and oil extraction, and the particle size is adjusted to -100 to 200 mesh.
また、さらに、これらの廃オイルシェールを州塩酸溶液
で、５０００８時間の酸処理を行なったのち、よく水洗
し、１００ｏｏで乾燥したものである。本発明による実
験結果を第１〜２表に示す。実験は２００肌の三角フラ
スコ又は５００叫のセパラブルフラスコに六価クロムを
含む酸性溶液を入れ、これに所定量の廃オイルシェール
又はこれを酸処理したものを添加したのち、マグネテイ
ツクスタラ一でかくはん操作をした。反応後、ろ液中の
全Ｃｒ，Ｃｒ（の）量をもとめ還元率をもとめた。第１
表 六価クロムの残存率に及ぼす酸濃度及び反応時間の
影響Ｃｒ（Ｗ）：５２．０の９／夕、温度２５ｏｏ米国
産廃オイルシェ−ル １夕／１０血【第２表 種類別に
よる残存六価クロムの変化Ｃｒ（Ｗ）：５２．０の夕／
夕、温度 ２５ｏｏ廃オイルシヱール添加量 １多／１
００の‘反応時間 １時間比Ｓ０４濃度 ０．０５ｈｏ
ｌ／そIn addition, these waste oil shale were acid-treated with a hydrochloric acid solution for 50,008 hours, thoroughly washed with water, and dried at 100°C. Experimental results according to the present invention are shown in Tables 1 and 2. In the experiment, an acidic solution containing hexavalent chromium was placed in a 200mm Erlenmeyer flask or a 500mm separable flask, and a predetermined amount of waste oil shale or an acid-treated solution was added thereto. I did a huge operation. After the reaction, the total amount of Cr and Cr in the filtrate was determined to determine the reduction rate. 1st
Table Effect of acid concentration and reaction time on residual rate of hexavalent chromium Cr(W): 52.0 9/night, temperature 25oo US industrial oil shale 1 evening/10 blood [Table 2 Residual chromium by type Change in valence chromium Cr(W): 52.0 evening/
Evening, temperature: 25 oo, amount of waste oil seal added: 1/1
00' reaction time 1 hour ratio S04 concentration 0.05ho
l/so
Claims (1)
を酸処理したものを接触させ六価クロムを三価クロムに
還元することを特徴とする六価クロムの還元方法。1. A method for reducing hexavalent chromium, which comprises contacting hexavalent chromium in an acidic solution with acid-treated waste oil siel to reduce hexavalent chromium to trivalent chromium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1968181A JPS6038341B2 (en) | 1981-02-13 | 1981-02-13 | Method for reducing hexavalent chromium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1968181A JPS6038341B2 (en) | 1981-02-13 | 1981-02-13 | Method for reducing hexavalent chromium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57135724A JPS57135724A (en) | 1982-08-21 |
| JPS6038341B2 true JPS6038341B2 (en) | 1985-08-31 |
Family
ID=12005971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1968181A Expired JPS6038341B2 (en) | 1981-02-13 | 1981-02-13 | Method for reducing hexavalent chromium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6038341B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0214545U (en) * | 1988-07-08 | 1990-01-30 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5571489A (en) * | 1995-01-27 | 1996-11-05 | Illinois Institute Of Technology | Process for chromium recovery from aqueous solutions |
| PT2870107T (en) * | 2012-07-06 | 2018-03-28 | Lanxess Deutschland Gmbh | Method for reducing hexavalent chromium in oxidic solids |
| CN114853372B (en) * | 2022-03-31 | 2024-04-09 | 铁岭大伙房水泥有限责任公司 | Low-chromium cement clinker combining oil shale slag and stainless steel slag and preparation method thereof |
-
1981
- 1981-02-13 JP JP1968181A patent/JPS6038341B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0214545U (en) * | 1988-07-08 | 1990-01-30 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57135724A (en) | 1982-08-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104310647A (en) | Recycling method for treating stainless steel pickling acid pickle and wastewater | |
| CA1296190C (en) | Inhibiting leaching of metals from catalysts and sorbents and compositions and methods therefor | |
| ATE9719T1 (en) | APPLICATION TECHNOLOGY FOR DESCALE OF SURFACES. | |
| US4629570A (en) | Removal of iron from chelant solutions | |
| CN108584901A (en) | A method of recycling ceramic grade ferric phosphate from more metal hazardous wastes | |
| JPS6038341B2 (en) | Method for reducing hexavalent chromium | |
| DE3060486D1 (en) | Process for converting residues from the purification of phosphoric acid by extraction into solid waste products suitable for deposition | |
| US5028272A (en) | Inhibiting leaching of metals from catalysts and sorbents and compositions and methods therefor | |
| WO1983004376A1 (en) | Deposition flocculant for use in water treatment | |
| CN109289503A (en) | A kind of ammonia-containing waste gas treatment method | |
| JPH0699181A (en) | Method for treating waste liquid containing decomposition-resistant organic substance | |
| DE69004041D1 (en) | Process for the treatment of new or used graphite powder to improve its effectiveness as a carrier for catalytic metals. | |
| JP4145431B2 (en) | Treatment of selenium-containing wastewater | |
| JPS55114388A (en) | Clarifying treatment of waste water | |
| JPS5637088A (en) | Treating method for effluent containing heavy metal complex salt | |
| JPS5539282A (en) | Organic waste water treating method | |
| SU1472454A1 (en) | Method of cleaning waste water from chromium compounds | |
| RU94026996A (en) | Method of sorbent production | |
| JPS61234998A (en) | Treatment of waste water containing chromium | |
| JPH0152047B2 (en) | ||
| JPH11197677A (en) | Method for treating selenium-containing drainage | |
| JPH02218417A (en) | Method for removing hydrogen sulfide from flue gas | |
| RU2082681C1 (en) | Method for removing heavy metal ions from concentrated process solutions and waste water | |
| CA1186076A (en) | Removal of copper from chelant solutions | |
| SU1177391A1 (en) | Method of isolating nitric and hydrofluoric acids from used etching solutions |