共查询到20条相似文献,搜索用时 125 毫秒
1.
某厂生产化学品排放的含铜废酸液中,含铜8~12g/l废酸的浓度高达5~6mol/dm^3,我们先用N235萃取铜,提取铜后的废液供钢铁厂作酸洗液。本文从HCl-H2SO4混酸溶液中对N235萃取铜的条件,萃取平衡反应以及萃合物组成等进行了研究。 相似文献
2.
[目的]化学镀铜废液含有高浓度重金属离子,属于危险废物,给环境保护带来巨大压力。[方法]基于破络沉淀的原理处理化学镀铜废液,以回收其中的铜。研究了不同促进剂、促进剂投加量、初始pH和反应时间对铜回收效果的影响,再进一步通过正交试验对回收工艺进行优化。[结果]最优的工艺条件为:促进剂CAT-2投加量10 g/L,初始pH 14.0,反应时间48 h。在该条件下处理后废液的总铜浓度由初始的3 680 mg/L降至1.00 mg/L,铜回收率达到99.97%。[结论]采用破络沉淀法可实现对化学镀铜废液中铜的有效回收,有利于提高资源利用率,降低企业生产成本。 相似文献
3.
4.
5.
6.
选用LIX-54作为萃取剂从印制板蚀刻废液中回收铜.探讨了萃取系统的一些条件.对含Cu107.39g/L和NH3128.4g/L的蚀刻液,经3级萃取即可达到含Cu约30g/L,并基本不萃氨,萃余液可返回蚀刻液.实验还考察了萃取剂的降解性能. 相似文献
7.
8.
某厂生产化学品排放的合铜废酸液中。含铜8~12g/l,废酸的浓度高达5~6mol/dm ̄3。我们先用N_(235)萃取铜。提取铜后的废液供钢铁厂作酸洗液。本文从HCl—H_2SO_4混酸溶液中对N_(235)萃取铜的条件、萃取平衡反应以及萃合物组成等进行了研究。 相似文献
9.
10.
11.
12.
13.
"考本"液在钢铁上直接化学镀铜 总被引:1,自引:0,他引:1
指出了普通镀铜工艺的缺点通过对铜原子结构的分析,提出了得到良好结合力的化学镀铜层的可能性,进而给出了使用“考本”液在钢铁上直接化学镀铜的工艺。该工艺操作简单、安全性好、成本低,得到的镀层与钢铁基体结合力好,表面可以达到镜面光泽。 相似文献
14.
研究了化学镀铜溶液中稳定剂对铜沉积速率的影响,着重考虑主配位剂、副反应的抑制剂、甲醛捕获剂对化学镀铜的影响。结果表明,在基本配方8 g/L CuSO4.5H2O,3 g/L HCHO2,8 g/L EDTA7,.5 g/L NaOH,工艺参数pH=12.5,温度50℃,时间40 min的基础上,各种稳定剂的适宜用量为6 mL/L CH3OH、8 mg/L K4Fe(CN)6、6 mg/L 22,’-bipy。在最佳工艺下得到的镀层外观红亮,表面平整,晶粒细致,化学镀铜液稳定。 相似文献
15.
16.
17.
文章介绍了以硫酸/硫酸钯作为印制电路铜箔化学镀镍的活化液。考察了表面活性剂的用量、活化时间及活化温度对化学镀镍的影响,确定了最佳的工艺参数。并对经该活化液活化的铜箔进行化学镀镍,通过扫描电镜(SEM)对化学镀镍层的微观形貌进行表征,同时考察了该镍层的钎焊性。研究结果表明,该活化液适用于印制电路铜箔的化学镀镍前活化。 相似文献
18.
Hydrolysis modification of nitrile groups on acrylonitrile butadiene styrene (ABS) plate surfaces into carboxylic acid groups was investigated to find a new recipe for electroless copper plating of ABS plate surfaces without etching reactions using chromic acid and also without a palladium catalyst. Hydrolysis modification of nitrile groups was successfully conducted in an aqueous sodium hydroxide (NaOH) solution (70 wt %) at 80°C for more than 72 h, and nitrile groups were modified into carboxylic acid groups. The hydrolysis modification was accelerated by the addition of dioxane as a supplement to the aqueous NaOH solution. The modification, when an aqueous mixture solution of NaOH (35 wt %) and dioxane (10 wt %) was used as a reagent, was accomplished at 65°C in 30 min. The hydrolyzed ABS plate surfaces were successfully metalized by electroless copper plating. A silver catalyst, instead of a palladium catalyst, was usable in the electroless copper‐plating process. Adhesion between the deposited copper metal and ABS plate surface was perfect for the Scotch tape test. Consequently, we propose a new recipe for an electroless copper‐plating process without an etching process using chromic acid and without a palladium catalyst. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009 相似文献
19.
Generally, contact or terminal areas are coated with nickel as a barrier layer; subsequently, gold plating is performed to maintain reliability of electrical interconnection. Treatment using dilute solutions of palladium ions have been applied to initiate electroless nickel plating on copper substrates because copper has no catalytic action for the oxidation of hypophosphite. However, trace amounts of palladium ions may remain on the unwanted areas and extraneous nickel deposits are often observed. We confirmed that nickel films without extraneous deposits can be formed using the activation solutions containing dimethyl amine borane (DMAB). Bondability on the electrolessly deposited gold was greatly influenced by the phosphorus contents of the deposited nickel films as the underlayer. Bonding strength after electroless gold plating was increased with increasing phosphorus contents in the nickel films. Stabilizers in the electroless gold plating also influenced the bonding strength. Baths containing cupferron or potassium nickel cyanide as a stabilizer showed superior bondability. Gold deposits having strong orientation with Au(220) and Au(311) indicated high bond strength. 相似文献
20.
化学镀铜在PCB生产中应用广泛,但常用的还原剂甲醛对人体和环境有害。本文综述了化学镀铜中替代甲醛的环保型还原剂的研究进展,介绍了以醛糖类、含硼化合物、低价金属盐、次磷酸盐作还原剂的化学镀铜研究现状及进展。 相似文献