载镍碳纳米管的载镍量分析

采用灼烧法预处理、丁二酮肟重量分析法来测定载镍碳纳米管的载镍量,获得稳定而准确的分析结果。结果表明,制备载镍碳纳米管催化剂时所加入的镍并不全部吸附在碳纳米管上;载镍效率随着碳纳米管载镍量的增加而降低。     

从废镍催化剂中提取镍,生产硫酸镍

介绍了如何从废镍催化剂中提取镍,减少环境污染,降低硫酸镍的制造成本。     

从工厂回收废料硫化镍制备镍盐

研究了以从工厂含镍废液中回收的硫化镍为原料,试验从酸浸出,除杂净化和沉镍等方面制取镍盐的工艺过程和最佳条件。由本工艺可以生产出高含量镍的镍盐,其品位符合国家或企业标准,废镍的回收率达91％以上。     

Preparation of Nickel Powders by Spray Pyrolysis of Nickel Formate

The preparation of nickel powders by the ultrasonic spray pyrolysis of Ni(HCOO)₂ was studied. Phase-pure nickel powder was obtained at as low as 350°C. HCOOH was a reducing source for nickel formation. Moreover, metallic nickel was obtained at a residence time as short as 0.1 s at 600°C. A broad range of particle morphologies, which included agglomerated nanoparticles, nonagglomerated submicrometer particles, hollow particles, and spherical dense particles, were obtained from Ni(HCOO)₂ pyrolysis and were shown to depend on the precursor solution and the operating condition.     

废镍触媒氨浸法制取一氧化镍

介绍了利用废镍催化剂制取一氧化镍的新工艺。进一步提高了镍的回收率,使镍的回收率达95%以上。产品质量达国家工业品标准。     

废镍触媒的综合利用工艺研究

扼要介绍了工业废镍催化剂的综合利用工艺研究。对其主成分Ni和Al均加以回收利用,分别制取结晶硫酸镍、氢氧化铝及氧化铝。产品质量达国家工业标准。Ni回收率高达90％。     

化学沉淀法回收化学镀镍废水中镍的研究

采用化学沉淀法从化学镀镍废水中回收镍,通过实验优化了NaOH处理含镍废水的工艺参数,并对沉渣镍盐进行了处理.结果表明,化学沉淀法处理化学镀镍废水的最佳工艺参数为:H2O2 30 mL/L,NaOH 15.67 g/L,絮凝剂聚丙烯酰胺4g/L.用硫酸处理沉淀物后镍的回收率可达97.25％.     

Structure of Nickel Oxide Containing Alumina

X-ray powder patterns have been used to measure the thermal expansion of ( a ) nickel oxide, ( b ) nickel aluminate, and ( c ) nickel oxide containing alumina and ignited at 1300°C in air. The results show that any solid solution that occurs must be restricted to less than 1 mole % of the solute. An X-ray line-broadening effect was found in the ignited and quenched nickel oxide containing alumina. This is attributed to heterogeneous lattice strains associated with a limited solid solution of nickel aluminate in nickel oxide at ignition temperatures and reprecipitation during quenching to room temperature.     

从人造金刚石酸洗废液中回收镍粉

研究了含镍酸洗废液的处理工艺和电解回收镍粉的方法,该方法处理人造金刚石酸洗废液不仅使排放废液达标([Ni2+] 0.8 mg/L,[Co2+] 0.2 mg/L,[Mn2+] 0.01 mg/L),而且电解回收镍粉时,采用加入含镍离子的饱和离子交换树脂组成的两相电解液进行电解,能获得比在单相电解液中电解高的电流效率、稳定的阴极液组成和高的镍回收率.     

电流密度对氨基磺酸镍电镀镍镀层的影响

为了解不同电流密度对氨基磺酸镍镀层的影响,分析了电流密度在0.1～20A/dm2时,氨基磺酸镍镀镍层的外观、硬度、应力和沉积速率。在工艺范围内,随电流密度的增加沉积速率增加、镀层硬度降低、孔隙率变大、表面出现针孔缺陷、应力变大,随后讨论了出现各种情况的原因。     

镍基合金镀层及其复合镀层磨蚀特性的研究

本文探讨了镍基合金镀层、镍基合金复合镀层及对比镀层的磨蚀特性.结果表明非晶态镍基合金及其复合镀层具有最佳抗磨蚀性能.     

钙镁磷肥副产物磷铁中镍的测定

在pH=6.2的HAc-NaAc缓冲溶液中,镍与偶氮胂Ⅲ形成1∶3的蓝色配合物。且镍含量在0~1μg/mL符合比尔定律,在620 nm处有最大吸收。在焦磷酸钾存在下测定了镍磷铁中镍的含量。     

发泡镍生产工艺探讨

发泡镍是一种新型三维网状金属多孔材料，被广泛应用于电池、电解，催化等多种领域。通过对其生产工艺的不同方法进行对比，提出一种对环境污染小而又容易实现的工艺路线，即：发泡树脂－高锰酸钾粗化－草酸去膜－胶态钯活化－化学镀镍－电镀镍－脱胎－热处理－成品。并指出发泡镍生产的趋势。     

含镍废料生产硫酸镍时除锌条件的探讨

本文叙述了用含镍废料生产硫酸镍时,工艺过程中的关键条件。     

A Radioisotope Study of the Nickel Dip

Radioisotope tracer studies of the deposition of nickel during nickel dipping of steel and of the effect of this nickel deposit on the reduction of cobalt ions to metallic cobalt during enamel firing showed the following: (1) The deposition of nickel on the metal surface during the dipping and the deposition of cobalt at the enamel-metal interface during firing were both markedly affected by the type of cleaning given the steel and by the mechanical deformation of the metal surface. (2) The nickel from the nickel dip remained as metal at the interface during firing of the enamel. (3) The presence of the nickel deposit had little or no effect on the deposition of cobalt at the interface during firing.     

氨基磺酸镍制备的研究

以镍粉和氨基磺酸为原料 ,并加入H2 O2 ,制备了氨基磺酸镍 ,H2 O2 加入镍粉与水的混合物中的速度不能太快 ,氨基磺酸分批加入。还以电铸后形成的镍片为原料制备了氨基磺酸镍 :先将这些金属镍片制成硝酸镍 ,然后由硝酸镍制成氢氧化镍或碳酸镍 ,最后将其与氨基磺酸反应生成氨基磺酸镍。在合成氨基磺酸时 ,发烟硫酸分两批加入 ,第一批发烟硫酸加入后反应温度为 30℃ ,第二批发烟硫酸加入后 ,反应温度分两阶段提升 ,第一阶段反应温度为 5 5～ 6 0℃ ,第二阶段为 70～ 80℃ ,产品晶型好 ,易纯化 ,产率较高     

Sintering in Active Nickel Oxide

Decomposition of nickel oxalate at 450°C in a stream of oxygen for 0.5 hr produced very reactive nickel oxide. Sintering rates in this material were faster (by factors up to 40) than in unreactive nickel oxide, produced by calcining nickel oxalate at 900°C for 5 hr in air. The Arrhenius activation energies for densification were significantly different in the two systems. Preliminary studies confirmed that normal grain growth, which follows a law of the form G³ = kt , occurs in nickel oxide.     

硼氢化钠还原法从化学镀镍废液中回收镍

针对化学镀镍废液中存在大量可再生利用的金属镍资源,采用正交实验法和TEM,XRD,XRF等分析手段,系统研究了化学镀镍废液中镍离子硼氢化钠催化还原回收工艺。实验结果表明:回收工艺中各因素对产量影响的显著性顺序为硼氢化钠的体积浓度、反应温度、pH值、KH570的质量浓度;不同分散剂对回收产物产量和粒度影响不同,其中,使用KH570得到的回收产物的产量最大,粒度分布也较集中。推荐化学镀镍废液较优回收工艺为:硼氢化钠140mL/L,KH5703g/L,温度40℃,pH值5。按该工艺所回收的产物平均粒径为70nm,含有镍、硼和磷等元素,并且由镍-硼和镍-磷非晶态合金组成,处理后废液中镍离子的质量浓度低于1mg/L,其回收率接近100%。     

利用铜镍电镀污泥生产金属铜和硫酸镍

提出了利用铜镍电镀污泥生产金属铜和硫酸镍的工艺流程,并用试验考察了各工序的技术经济指标。试验结果表明,铜粉品位大于90％,铜的回收率大于95％,硫酸镍质量达到工业一级,镍回收率大于80％,浸出渣和净化渣经固化处理后可作普通建筑材料使用,工艺过程产生的废水可以达标排放。     

氨基磺酸盐电解液中金属镍的阳极行为

研究了电解镍阳极和含硫的活性镍阳极在氨基磺酸盐电解液中的阳极行为，阳极极化曲线的测定结果表明，电解镍阳极较之含硫活性镍阳极容易钝化得多，前者的临界钝化电流密度仅为后者临界钝化电流密度的１／４０，工艺实验结果表明，含硫活性镍阳极在宽的电位范围内进行金属镍的电化学溶解反应；而电解镍阳极在发生镍的阳极溶解反应的同时，还进行着ＮＨ２ＳＯ３离子的氧化反应，采用电解镍阳极对电解液进行了小电流电解１０～４０Ａｈ