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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31 Oct 1996TL;DR: In this article, a 3-halopropylalkoxy silane represented by the general formula X (CH2)3 Si (OR)a R3-a (I) is added, wherein X denotes Cl or Br; R denotes a methyl, ethyl or propyl group wherein R's can be all identical or different from each other; and a denotes an integer 1, 2 or 3.
Abstract: After reacting sodium sulfide anhydride and hydrogen sulfide, 3-halopropylalkoxy silane represented by the general formula X (CH2)3 Si (OR)a R3-a (I) is added reacted, wherein X denotes Cl or Br; R denotes a methyl, ethyl or propyl group wherein R's can be all identical or different from each other; and "a" denotes an integer 1, 2 or 3.
20 citations
TL;DR: Experimental results showed that lead recovery rate increased with an increase in the amount of added sodium carbonate, sodium sulfide, carbonates, temperature and holding time initially, and then reached a stable value, and proposed a practical and economical process for recovery of lead and utilization of waste glass slag.
20 citations
TL;DR: In this paper , the role of (NH 4 ) 2 SO 4 during the sulfurization of azurite and its response to flotation were investigated, and the flotation results showed that adding NH 4 2 S 4 prior to sulfurization decreased the formation of colloid in flotation pulp and restored the floatability of suppressed azurites caused by excess sodium sulfide.
Abstract: In this study, the role of (NH 4 ) 2 SO 4 during the sulfurization of azurite and its response to flotation were investigated. The flotation results showed that adding (NH 4 ) 2 SO 4 prior to sulfurization decreased the formation of colloid in flotation pulp, and the floatability of the suppressed azurite caused by excess sodium sulfide was restored. After adding (NH 4 ) 2 SO 4 prior to sulfurization, the formation of Cu(NH 3 ) n 2+ intermediate products changed the path of the sulfurization reaction, which slowed the direct impact of HS − on the azurite surface. The nucleation rate was reduced, and the growth of copper sulfide crystal was improved. Covellite (syn, CuS) with larger crystal grains was formed on the azurite surface, thereby enhancing the mechanical stability of copper sulfide products onto the mineral surface. Therefore, the generated copper sulfide colloid significantly reduced, ultimately promoting the effective adsorption of xanthate on the azurite surface.
20 citations
20 citations
TL;DR: Cinnabar (hexagonal HgS) can be grown below the 344 °C phase transition in the temperature range of 250 to 330°C from low- melting Na 2 S-sulfur fluxes.
20 citations