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(DRIFTS) measurements were used to characterize the activation products on the hemimorphite surface and their subsequent interaction with sodium butyl xanthate(SBX).The results showed that a Zn S......
Seaweed glue as a novel polymer depressant for the selective separation of chalcopyrite and galenaXiong Chen,Guo-hua Gu,Zhi-xiang ChenSchool of Minerals Processing and Bioengineering, Central South University摘 要:The use of seaweed glue(SEG) as a novel polymer depressant for the separation of chalcopyrite from galena with butyl xanthate(BX......
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concentration of chlorothalonil, dosages of tertiary butyl alcohol, humic acid and initial pH value on degradation of chlorothalonil, as well as the reaction mechanism were studied. The results reveal... μg/L during 180 min irradiation. Tertiary butyl alcohol had negative effect on chlorothalonil degradation, while lower concentration of humic acid promoted the sonolysis, and kapp declined......
that the mass concentration rate of BOD5 and CODCr of ethyl xanthate, butyl xanthate, amyl xanthate, isopropyl xanthate and isobutyl xanthate are all less than 0.25, the biodegradation extent can reach... of the biodegradability is as follows: ethyl xanthate, butyl xanthate, amyl xanthate, isopropyl xanthate and isobutyl xanthate. Compared to alkyl chain length, the branched chains have more significant......
: The characteristics of N-propyl-N′-ethoxycarbonyl thiourea (PECTU) were studied in the flotation experiments of chalcopyrite and pyrite compared with butyl xanthate (BX). The interaction mechanism between mineral... hydrometallurgical performance for flotation recovery of chalcopyrite. FAIRTHORNE et al [12,18] provided evidence that there was no reaction between butyl ethoxycarbonyl thiourea (BECTU) and ferrous......
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进行量热试验较为合适. 图3 丁基黄药用量和活化剂用量对氰化黄铜矿回收率的影响 Fig. 3 Effects of butyl xanthate(a) and activator(b) dosages on recovery of cyanide chalcopyrite 次氯酸钠为强氧化剂,当其用量较低时可优先对CN-起氧化作用[15],由图3(b)可看出,随着次氯酸钠...矿的可浮性依次升高.经次氯酸钠,焦亚硫酸钠作用后,丁基黄药在氰化黄铜矿表面吸附的表观活化能分别降低了76.64%和 79.84%,这说明次氯酸钠和焦亚硫酸钠都能大幅降低丁基黄药在氰化黄铜矿表面吸附的难度,从而起到活化作用. 图4 丁基黄药在氰化黄铜矿表面吸附过程的量热曲线 Fig. 4 Caloric curves of butyl xanthate......
%) and butyl octyl phthalate (8.21%) are the major constituents. The oils exhibit strong antimicrobial activity and display more potent against bacteria than fungi. Key words: Calycopteris floribunda... acid (59.18%), linolic acid (12.70%) and butyl octyl phthalate (8.21%). It seems that the composition of the volatile oil from the leaves is more complex than that from the barks with 52 components......
South University, Changsha 410083, China) Abstract: Generations -0.5-4.5G (G is generation) of poly (amid amine) (PAMAM) dendrimer were synthesized using ethylenediamine and methyl acrylate as raw......
