The results show that pretreatment prior to TCF bleaching is an important measurement to upgrade the profile of metal ions of unbleached pulp,and to improve the bleaching response.
结果说明,纸浆无污染漂白前的预处理是改善未漂浆金属离子分布,提高漂白效果的重要措施;而且酸预处理比螯合剂预处理效果要好,经济上也是可行的。
Each method has its advantage and weakness, but the method of no pollution and high productivity is more and more concerned by people.
异氰酸酯是一种重要的有机合成材料,它的合成方法主要有光气法,碳酸二甲酯法,硝基苯羰化等;每种方法各自有其优点和缺点,但无污染,高产率的合成方法,越来越受到人们的重视。
Relation of open-circuit voltage and oxygen content in molten metal during unpolluted deoxidization;
无污染脱氧过程中外电路电压与熔池中氧含量的关系
Researches on metallurgy with controlled oxygen flow for unpolluted deoxidation for molten metal and extraction of metal from oxide dissolved in ionic melt are introduced.
总结可控氧流冶金的原理、特点、方法,介绍可控氧流冶金在金属熔体的无污染脱氧以及从溶解于离子熔体中的氧化物提取有价金属方面的研究状况,认为可控氧流冶金有利于创建全新的绿色冶金新技术。
Solid electrolyte, electronic conduction materials and deoxidizer are integrated to make into a deoxidization unit which is used in examination of the unpolluted deoxidization without inclusion for steel melts.
实验表明,脱氧体在钢液中的无污染脱氧过程是一个高速、高效的过程,而且脱氧产物和脱氧剂对钢液均不造成污染。
This paper introduced the improves of roasting-sodium processing and such pollution-free processing as acid leaching-extration,roasting in air-acid leaching-extration,liming roasting-alkali leaching on extraction of V_2O_5 from stone coal,the total recovery rate obtains enhances,the industrial application prospect is good.
介绍了石煤提钒传统工艺的改进以及酸法-萃取、无盐焙烧-酸浸-萃取、氧化焙烧-碱浸等几种从石煤无污染提取五氧化二钒的工艺流程,上述工艺不但生产过程无环境污染,钒的回收率还大有提高,是很有前途的清洁生产工艺。
Extracting Co and Cu from cobalt white alloy in hydrochloric acid solution system with pollution-free oxidant are studied.
在盐酸体系中,采用无污染氧化剂浸出难溶钴白合金的工艺条件进行了研究。
Research and Application of a New Non-polluting Salt Bath Nitrocarburising Process;
新型无污染盐浴软氮化工艺的研究与应用
The non-pollution technology and environmental treatment in Fukang smeltery are introduced in the paper.
介绍了阜康冶炼厂无污染新工艺和环境治理的有关情况 ,从理论上阐述了无污染工艺和污水治理的技术原理 ,对有色金属冶炼工业逐步采用湿法精炼清洁工艺有一定的指导作
This is a new non-pollution leather dying technology.
结果表明： ＣＯ２ 超临界流体介质代替水作介质可用于皮革染色， 并且具有节约染料、上染率高、染料分散均匀、结合牢固等优点， 是一种新的无污染的染色技术。