杜笙樹脂，德國沃奇濾料
普通會員
產品價格￥1.00元/升
產品品牌杜笙
最小起訂≥25 升
供貨總量100000 升
發貨期限自買家付款之日起 3 天內發貨
瀏覽次數400
企業旺鋪https://wephong.eeeqi.net/
更新日期2017-02-08 09:15
品牌： |
杜笙 |
所在地： |
北京 豐臺 |
起訂： |
≥25 升 |
供貨總量： |
100000 升 |
有效期至： |
長期有效 |
| 金回收: 使用TULSION® 杜笙離子交換樹脂從qing化物溶液中回收金.Gold Recovery : From cyanide liquor USING TULSION® ION EXCHANGE RESIN.簡介/ INTRODUCTION :傳統上使用活性碳吸附金子。珍貴的金會被活性碳吸附于表面,再藉由洗滌或直接焚燒以回收金。Conventionally activated carbon is used for extracting the gold from the mother liquor commonly contacted with beds of activated-carbon. The precious noble metal loaded on the activated carbon is recovered by elution or simply by incineration of the carrier at high temperature.使用離子交換樹脂回收貴金屬比活性碳還具有多方面的優勢, 因為藉由特殊制造過程中, 我們可以在其結構上的有效官能基上置入具有選擇性的離子,以選擇性的吸附此貴重金屬。Ion exchange resins are more versatile substrates than activated carbons can be used, because specific functional groups can be afixed on the resin matrix, for better selectivity, during the synthesis. These resin can be tailor-made to improve the gold carrier features such as selectivity, resistance to poisoning by calcium or organic materials and loading capacity.因此, 由于具有經濟考慮優勢, 離子交換樹脂普遍被使用于貴金屬回收。而大部份使用陰離子交換樹脂來交換吸附貴金屬。Therefore the ion exchange resins are economically adopted for the gold recovery. Mostly Anionic type of ion exchange resin are used that adsorb the gold.用qing化物萃取金的過程中, 金會以陰離子的qing化金型式存在, 既Au(CN)2- ; 再經由強堿或弱堿的陰離子交換樹脂交換回收。如Tulsion®A-23（強堿）,Tulsion®A-27mp（強堿）及Tulsion®A-2X mp (弱堿) 。The gold extracted by cyanidation is in the form of anionic aurocyanide complex Au(CN)2 - and can be recovered from the pregnant solution by ionic exchange with strong or weak base anion exchange resin ,such as Tulsion®A-23,Tulsion® A-27MP and Tulsion®A-2XMP(a) 強堿離子交換樹脂方面的應用:此型的強堿型陰離子樹脂具有四級銨的官能基,在高pH 值的溶液中,藉由交換氯離子的相反離子來吸附Au(CN)2- ; 其反應機構如下:(a) STRONG base ANION:These resins contain quaternary ammonium functionality which, when contacted with the high pH leachate stream, adsorb the aurocyanide anion via exchange for the resin's chloride counter-ion:XxxNR3 *X + Au(CN)2 xxx NR3 * Au(CN)2 + X再藉由更強的陰離子樹脂或是用其它的化學反應, 將吸附的金洗滌出。通常最經濟實惠的替代反應是用qing化鋅或是用硫代qing酸鹽將金洗出, 如下:Elution of the adsorbed gold complex can be accomplished by displacement with a more strongly adsorbed anion or by chemical reaction. Competitive displacement is typically done with either zinc cyanide or thiocyanate:XxxNR3*Au(CN)2 + SCN+ xxxNR3*SCN + Au(CN)2XxxNR3*Au(CN)2 + Zn(CN)42+ [xxxNR3*]2 Zn(CN)4 + 2 Au(CN)2不管以上是用何種方法洗滌出金錯化物,此強酸型陰離子樹脂最終都必須用硫酸或硫酸鐵將其轉換回硫酸鹽型式,以利下一次的金吸附的反應機構模式。其回復的反應機構如下:In either case, the resin must then be converted back to the sulfate form prior to return to adsorption service, typically with sulfuric acid or ferric sulfate. however, the preferred method of elution is by chemical reaction with thiourea:XxxNR3*Au(CN)2 + SC(NH2)2 + 2H2SO4 xxxNR3*HSO4 + 2 HCN+ [ Au {SC(NH2)2}2] + HSO4-b) 弱堿型陰離子交換樹脂的應用:另一種是用弱堿型的陰離子交換樹脂。由于此弱堿型的陰離子樹脂都是以自由基型式存在, 所以必須先用酸處理之后, 再用來吸附金。其反應機構如下:b) WEAK base ANION:An alternative approach to the above is the use of weak base anion exchange resins which, because they are normally supplied in the "free base" form, need to be treated with acid prior to contact with the leachate stream. A typical cycle is conceptually as follows:XxxNR2 + HX xxxNR2H*X-.XxxNR2 H+X + Au(CN)2 XxxNR2 H+Au(CN)2 +XXxxNR2H+Au(CN)2 + NaOH XxxNR2 + Na+Au(CN)2 + H2O因為弱堿型陰離子的高交換容量及可以得到較高的處理量, 于小型的操作系統模式, 通常都會用焚燒來取代洗滌的方式來回收金。Because of the high capacity available with ion exchange resins and the high loading that can therefore be obtained, in most small scale operations it is often an option to consider incineration of the loaded resin rather than elution.通常弱堿型陰離子交換樹脂最被常用于此貴金屬回收。Commonly the Weak base anion ion exchange resins are used for this application建議杜笙/ Tulsion®離子交換樹脂型號:RECCOMENDED TULSION PRODUCT :若需詳細資料,請與我們聯系:產品/ PRODUCT 型式/ TYPETulsion® A-23 AU 強堿凝膠型陰離子具有四級銨官能基A strong base gel-type resin containing quaternary-amine functional groupsTulsion® A-27MP 強堿巨孔型陰離子具有四級銨官能基A strong base macro porous resin containing quaternary-amine functional groupsTulsion® A-2XMP S 弱堿巨孔型陰離子具有四級銨官能基A weak base macro porous resin containing tertiary amine functional group |
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