会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 21. 发明授权
    • Process for recovery of reusable chromic acid from the waste chromic
acid solution containing impurities
    • 从含有杂质的废铬酸溶液中回收可重复使用的铬酸的方法
    • US4349514A
    • 1982-09-14
    • US66167
    • 1979-08-13
    • Morio WatanabeSanji Nishimura
    • Morio WatanabeSanji Nishimura
    • B01D11/04C01G37/00C01G37/033C01G37/14C02F1/469C23C22/86C25B1/00C25D21/16C25F7/02B01D11/00
    • B01D61/44C01G37/003C25B1/00B01D2311/04C02F1/469C02F2101/22Y10S204/13Y10S210/913
    • A process for recovery of reusable chromic acid from waste chromic acid solution containing impurities, which process comprises a first step in which the solution containing chromic acid is introduced into the cathode compartment in an electro-dialysis process and free chromic acid or chromate ions in the above solution are transferred to the anode compartment, a second step in which H.sub.2 SO.sub.4 is added in at least equivalent amounts to the heavy metallic ion contained in the outlet solution, in which chromic acid ion concentration is reduced, in order to convert chemical species of the contained metallic ion and increase the H.sup.+ ion concentration and then chromate ions in the resultant solution are extracted into an organic phase with contact of an organic solvent (A), and a third step in which residual amounts of chromic acid ion remaining in the aqueous raffinate from the second step are extracted into an organic phase with contact of an organic solvent (B). Organic solvents A and B are regenerated by stripping the organic phase with a suitable strip reagent.
    • 从含有杂质的废铬酸溶液中回收可再利用的铬酸的方法,该方法包括第一步骤,其中将含有铬酸的溶液在电渗析过程中引入阴极室,并且将游离的铬酸或铬酸根离子 将上述溶液转移到阳极室,第二步骤,其中以至少等量的量加入H 2 SO 4,其中所述重金属离子包含在出口溶液中,其中铬酸离子​​浓度降低,以便将化学物质转化为 含有金属离子并增加H +离子浓度,然后将所得溶液中的铬酸根离子与有机溶剂(A)接触而萃取到有机相中,并且残留在残液中的残余量的铬酸离子的第三步骤 从有机溶剂(B)与第二步骤萃取到有机相中。 有机溶剂A和B通过用合适的剥离试剂汽提有机相来再生。
    • 23. 发明授权
    • Process for producing titanium dioxide
    • 二氧化钛生产工艺
    • US5277816A
    • 1994-01-11
    • US756481
    • 1991-09-09
    • Morio Watanabe
    • Morio Watanabe
    • C01G23/00C01G23/053B01D11/04
    • C01G23/0532C01G23/001
    • A process for producing titanium dioxide which discharges no waste is disclosed. In a first step, a sulfuric acid solution containing titanium ion with one or more kinds of metal ions is contacted with a first organic solvent to extract the titanium ion as a sulfuric acid complex. The organic solvent containing the extracted titanium as a sulfuric acid complex (titanyl sulfate) is contacted with an aqueous liquid to strip the titanium into the aqueous liquid and regenerate the first organic solvent. In a second step, the aqueous liquid containing the titanium is subjected to hydrolysis to form insoluble titanium hydroxide, and the titanium hydroxide is washed with dilute sulfuric acid and/or clear water. In a third step, the raffinate of extraction in the first step is contacted with a second organic solvent to extract the titanium ion and the organic solvent containing extracted titanium is contacted with water, dilute sulfuric acid solution or a dilute titanyl sulfate solution to strip the titanium, and regenerate the organic solvent.
    • 公开了一种不排出废物的生产二氧化钛的方法。 在第一步骤中,将含有一种或多种金属离子的钛离子的硫酸溶液与第一有机溶剂接触以提取作为硫酸络合物的钛离子。 将含有作为硫酸络合物(硫酸氧钛)的提取的钛的有机溶剂与含水液体接触以将钛剥离到水性液体中并再生第一有机溶剂。 在第二步骤中,将含有钛的含水液体进行水解以形成不溶性氢氧化钛,并用稀硫酸和/或清水洗涤氢氧化钛。 在第三步骤中,将第一步骤中的萃取液与第二有机溶剂接触以提取钛离子,并将含有萃取的钛的有机溶剂与水,稀硫酸溶液或稀硫酸硫酸盐溶液接触以剥离 钛,并再生有机溶剂。