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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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Journal ArticleDOI
TL;DR: In this paper, the activation mechanism of sodium thiocyanate (NaSCN) on heteromorphite has been investigated for the first time, and the results showed that the effect of NaSCN was better than sodium sulfide and was slightly affected by activation time.

6 citations

Patent
31 Mar 1987
TL;DR: In this article, the authors presented a compsn. which gives molded products having excellent clarity, thermal stability during melting, methanical characteristics and dimensional stability by extrusion, consisting of a poly-p-phenylene sulfide contg.
Abstract: PURPOSE: To provide the title compsn. which gives molded products having excellent clarity, thermal stability during melting, methanical characteristics and dimensional stability by extrusion, consisting of a poly-p-phenylene sulfide contg. a specific amount of a metal of Group IA elements of the periodic table. CONSTITUTION: An alkali sulfide (A) (e.g., sodium sulfide) is polymerized with a dihalobenzene (B) (e.g., p-dichlorobenzene) in a polar solvent (e.g., N- methylpyrrolidone) at 200W300°C for several hr. If desired, the product is washed with an org. solvent compatible with poly-p-phenylene sulfide at a high temp. to dissolve low-molecular matters and the resulting product is washed with water to obtain the title compsn. which is mainly composed of a poly-p- phenylene sulfide composed of at least 70mol.% of repeating units of the formula and having a weight-average MW (MW) of 30,000W90,000 and a ratio (MW/MN) of MW to the number-average MW (MN) of 3W10 and contains 100W2,000ppm, pref. 200W800ppm of a metal (e.g., Na) of Group IA elements of the periodic table and 100ppm of a metal (e.g., Ca) of Group IIA elements. COPYRIGHT: (C)1988,JPO&Japio

6 citations

Patent
20 Jan 1998
TL;DR: In this article, an aqueous solution or suspension prepared by allowing a compound containing hexavelent molybdenum trioxide to react with an alkali hydrosulfide was presented.
Abstract: PROBLEM TO BE SOLVED: To efficiently obtain the subject compound which is less corrosive and excellent in lubricity and is useful as a lubricant by allowing an aqueous solution prepared by reaction of a substance containing hexavalent molybdenum with an alkali hydrosulfide to react with carbon disulfide, a secondary amine and a mineral acid SOLUTION: (A) An aqueous solution or suspension prepared by allowing a compound containing hexavelent molybdenum, for example, molybdenum trioxide to react with an alkali hydrosulfide, for example, sodium hydrosulfide or an alkali sulfide, for example, sodium sulfide, (B) carbon disulfide, (C) a secondary amine, for example, di-2-ethylhexylamine and (D) a mineral acid, for example, diluted hydrochloric acid are allowed to react so that the equivalent amount (d) of the mineral acid of the component D to be added may satisfies formula I (R' is the total number of carbon atoms originating from the component (C) in the reaction product) per 1 equivalent of the alkali hydrosulfide or sulfide in the component (A) to efficiently produce the objective compound of formula II(R -R are each a hydrocarbon; R' as a total carbon atom number of' R -R , is >=32; X -X are each S, O)

6 citations

Patent
12 Dec 2007
TL;DR: The deoppilant making for drainage system is made in weight percentage of sodium sulfide 5-15%, liquid glass 3-10%, surface activator 05-30, disinfectant 05- 30, antiseptic 01-05, chelant EDTA 02-10, liquid perfume compounds 1-05% and water 70-85% as discussed by the authors.
Abstract: The invention relates to the deoppilant making for drainage system It is made in weight percentage of sodium sulfide 5-15%, liquid glass 3-10%, surface activator 05-30%, disinfectant 05-30%, antiseptic 01-05%, chelant EDTA 02-10%, liquid perfume compounds 01-05% and water 70-85%It solutes the sodium sulfide and liquid glass with water, adds the rest components for sufficient blending for 10 minutes till its even mixture to get the agent It is simple and significant in effect

6 citations

Patent
15 Oct 2014
TL;DR: In this paper, a processing method for recovering nickel, chromium and iron from stainless steel factory waste residue is presented, which is simple, easy to operate and low in cost, can effectively solve the problem of waste residue pollution in the production of stainless steel.
Abstract: The invention discloses a processing method for recovering nickel, chromium and iron from stainless steel factory waste residue. The method is as below: adding mixed acid into the stainless steel factory waste residue, leaching out nickel, chromium and iron in the waste residue, and filtering to separate a pickle liquor and leaching residue; adding sodium sulfide to the pickle liquor under normal temperature, and after reaction conducting solid-liquid separation to obtain nickel sulfide and a filtrate; heating the filtrate, and adding a sodium hydroxide solution and a hydrogen peroxide solution; converting trivalent chromium into hexavalent chromium to stay in the supernatant by an alkali leaching oxidation method, and converting trivalent iron into a ferric hydroxide precipitate, conducting solid-liquid separation to obtain a sodium chromate solution; and recovering the chromium, smelting down the ferric hydroxide precipitate for smelting utilization, and subjecting the acid leaching residue to natural air drying for agricultural landfill. The whole process of the invention does not produce contaminants, and realizes complete recovery and utilization of resources; and the process is simple, easy to operate and low in cost, can effectively solve the problem of waste residue pollution in the production of stainless steel, and has high economic benefit and environmental benefit.

6 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202325
202233
202136
2020107
2019143
2018172