Topic
Sodium sulfide
About: Sodium sulfide is a research topic. Over the lifetime, 2851 publications have been published within this topic receiving 27733 citations. The topic is also known as: disodium sulfide.
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Patent•
09 Jun 2000TL;DR: In this article, an apparatus for removing volatile impurities such as mercury and selenium from a weak acid solution resulting from scrubbing gases created in the production of sulfuric acid by roasting of sulfide concentrates was presented.
Abstract: The present invention relates to an apparatus for removing volatile impurities such as mercury and selenium from a weak acid solution resulting from scrubbing gases created in the production of sulfuric acid by roasting of sulfide concentrates. The apparatus comprises a calcine filtering unit for removing calcine from the weak acid solution, a sodium sulfide mixing unit for precipitating mercury from the weak acid solution, a sodium dithionite mixing unit for precipitating selenium from the weak acid solution, and a mercury-selenium filtering unit for filtering the precipitated mercury and selenium from the weak acid solution. The present invention further relates to a treatment plant utilizing such an apparatus, a process for removing volatile impurities from a weak acid solution, and a selenium cake obtained by utilizing the present invention.
14 citations
TL;DR: Tetracarbonylcobaltate ion generated by a treatment of cobalt(II) chloride with either sodium sulfide or sodium borohydride under a normal pressure of carbon monoxide was capable of catalyzing carbonylation of aryl halides in the presence of calcium hydroxide and methyl iodide to give arylsglyoxylic acids in good selectivity.
Abstract: Tetracarbonylcobaltate ion generated by a treatment of cobalt(II) chloride with either sodium sulfide or sodium borohydride under a normal pressure of carbon monoxide was capable of catalyzing carbonylation of aryl halides in the presence of calcium hydroxide and methyl iodide to give arylglyoxylic acids in good selectivity.
14 citations
Patent•
10 Jun 2009
TL;DR: In this article, a method for recovering zinc and lead from waste electrolytic anode slime was proposed, which consists of grinding the waste anode slime first, adding the waste electrolyti anode mixture into a mixed acid solution, stirring the mixture for 2 to 4 hours at a temperature of between 20 and 60 DEG C, filtering the mixture, and taking filter residue for standby.
Abstract: The invention discloses a method for recovering zinc and lead from waste electrolytic anode slime The method comprises: grinding the waste electrolytic anode slime first, adding the waste electrolytic anode slime into a mixed acid solution, stirring the mixture for 02 to 4 hours at a temperature of between 20 and 60 DEG C, filtering the mixture, and taking filter residue for standby; and adding filtrate into an ammonia water-ammonia carbonate solution, stirring and filtering the mixture, adding sodium sulfide solid into filtrate, obtaining lead sulfide black deposit, uniformly mixing the lead sulfide deposit and solid sodium hydroxide, performing heating reaction for 40 to 50 minutes, and performing temperature reduction, waterlogging and filtration to obtain metallic lead The method has the following advantages: firstly, the method adopts wet-method technology and has low energy consumption, low cost and good labor conditions; secondly, the method adopts a method for performing oxidation reduction and precipitation in a solution to remove impurities, and avoids the complex purifying process; and thirdly, the method simultaneously recovers the zinc and the lead in the waste slime and has high recovery rate and high metal grade
13 citations
Patent•
14 Sep 1982
TL;DR: In this article, a polyphenylene sulfide with high bulk density is obtained by polymerization, in the presence of a sulfur source and amide-based solvent, immediately followed by gradually cooling the system to make the polymer separate out in the form of granules of specific size.
Abstract: PURPOSE: To obtain a polyphenylene sulfide with high bulk density, easy to handle, by polymerization, in the presence of a sulfur source and amide-based solvent, of an aromatic polyhalide immediately followed by gradually cooling the system to make the polymer separate out in the form of granules of specific size. CONSTITUTION: An aromatic polyhalide containing pref. ≥70wt% of p-dihalobenzene is subjected to polymerization on stirring in an inert atmosphere pref. at 220W280°C for 1W5hr, in the presence of a sulfur source (e.g., sodium sulfide) and amide-based solvent (e.g., N-methyl pyrrolidone). Following completion of the polymerization, the system is gradually cooled at a rate of 50°C/min (pref. slower than 10°C/min) to 240°C or lower to make the resulting polymer separate out in the form of granules, thus obtaining the objective polyphenylene sulfide with a crystallite size of 60Å or larger. COPYRIGHT: (C)1984,JPO&Japio
13 citations
TL;DR: In this article, a cobalt phosphide nanoarray in situ grown on Ti mesh (CoP NA/TM) behaves as a durable robust non-noble-metal electrocatalyst for sodium sulfide (Na2S) oxidation with the need of potential of 131 V to drive 20 µm−2 in 10 µm KOH with 50 µm Na2S.
13 citations