Sulfites, Thiosulfates, and Dithionites

Barberá, José Jiménez; Metzger, Adolf; Wolf, Manfred

doi:10.1002/14356007.a25_477

Cited by 11 publications

(11 citation statements)

References 12 publications

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“…= 112.8 °C) at the reaction temperature can also form a protective coat. Similarly, the existence of excess S may also react with Li 2 SO 3 to form Li 2 S 2 O 3 . Although Li 2 SO 4 was not generated as hoped, these experimental results strongly indicate the feasibility of producing Li 2 S in the ambient air, which is extremely desirable for industrial applications.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Deliquescent Lithium Sulfide in Air

Yang

et al. 2023

ACS Appl. Mater. Interfaces

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In the field of lithium–sulfur batteries (LSBs) and all-solid-state batteries, lithium sulfide (Li2S) is a critical raw material. However, its practical application is greatly hindered by its high price due to its deliquescent property and production at high temperatures (above 700 °C) with carbon emission. Hereby, we report a new method of preparing Li2S, in air and at low temperatures (∼200 °C), which presents enriched and surprising chemistry. The synthesis relies on the solid-state reaction between inexpensive and air-stable raw materials of lithium hydroxide (LiOH) and sulfur (S), where lithium sulfite (Li2SO3), lithium thiosulfate (Li2S2O3), and water are three major byproducts. About 57% of lithium from LiOH is converted into Li2S, corresponding to a material cost of ∼$64.9/kg_Li2S, less than 10% of the commercial price. The success of conducting this water-producing reaction in air lies in three-fold: (1) Li2S is stable with oxygen below 220 °C; (2) the use of excess S can prevent Li2S from water attack, by forming lithium polysulfides (Li2S n ); and (3) the byproduct water can be expelled out of the reaction system by the carrier gas and also absorbed by LiOH to form LiOH·H2O. Two interesting and beneficial phenomena, i.e., the anti-hydrolysis of Li2S n and the decomposition of Li2S2O3 to recover Li2S, are explained with density functional theory computations. Furthermore, our homemade Li2S (h-Li2S) is at least comparable with the commercial Li2S (c-Li2S), when being tested as cathode materials for LSBs.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Deliquescent Lithium Sulfide in Air

Yang

et al. 2023

ACS Appl. Mater. Interfaces

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“…Sodium thiosulfate (Na 2 S 2 O 3 ) a potent bleach neutralizer is used for the treatment of drinking water to destroy excess bromine and chlorine levels. In special cases can be used to remove oxygen in water purification residuals with chromium content [13]. It is also used in the industry of adhesives, arts, tanning, cleaning and maintenance, pulp, and paper.…”

Section: Discussionmentioning

confidence: 99%

A preservative with bleaching and emulsifying effects

Dashtdar

Dashtdar²,

Khan

et al. 2020

Medical Research Journal

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In cosmetic products, additives are substances that aren't consumed as main ingredients, actually, they are added to these products in the processes of preparation, packaging or storage in order to make them safer, improve their appearance, help to present a stable, attractive and easier to apply the product, without being stricken by environmental conditions [1,2]. The protection and quality of toiletries or medicine products are important elements in regards to the health of the consumers. Adding preservatives to the formulations helps the cosmetic manufacturer achieve the first objective of products i.e. meeting the requirements of the users while being safe under normal conditions of use. Despite advances in manufacturing conditions (raw materials with exhaustive bacteriological controls and manufacturing in sterile areas), and the containers used (single-dose ampoules, opaque and hermetic bottles which are used for precise amount), there is still the possibility of colonizing cosmetics without a preservative in their composition. Principally adding extra compounds as emulsifier and blanching agent causes more noxious compounds in the products, which should be avoided. Hence, it is desirable that some components of the formulation fulfill this function [3]. In our study, a combination of sodium thiosulfate and Citric acid contains emulsifiers and bleaching substances. When this mixture was added to Azadirachta indica (Neem) gum or Acacia Senegal (Gum Arabic), besides the above-mentioned properties, turned these gums into a thickener and stabilizer agent. This formulation can prevent the spreading of microorganisms. It will be shown from the findings and results that this formula can be used as a preservative agent in the cosmetic and pharmaceutical industry with significant emulsifying and bleach potential. The rare side effect of this additive is mild skin hypersensitivity reaction only in sensitive individuals.Objective: The purpose of the study was to develop a powerful preservative based on synthetic and natural ingredients, with bleaching and emulsifying effects.

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“…Sodium metabisulphite is an inorganic compound with molecular formula of Na 2 S 2 O 5 , forming, in water, sodium bisulphite (Barbera ´et al 2000) Na 2 S 2 O 5 zH 2 O?2NaHSO 3…”

Section: Introductionmentioning

confidence: 99%

“…The ability of sodium sulphites to react with aldehydes is well known (Walker 1944; Anonymous 1981; Barberá et al 2000). There are some commercial formaldehyde scavengers available on the market.…”

Section: Introductionmentioning

confidence: 99%

Sodium metabisulphite as a scavenger of air pollutants for wood-based building materials

Costa

Pereira

Ferra³

et al. 2013

International Wood Products Journal

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This paper reports on different applications of sodium metabisulphite as a formaldehyde scavenger. The reduction in formaldehyde emission and the effect on physicomechanical properties of particleboards were studied. The scavenger was mixed with urea-formaldehyde resins with different formaldehyde to urea molar ratios and added separately in the production of particleboards. Several differences between the formaldehyde content and physicomechanical properties of boards were found. When applied to melamine-formaldehyde resins, the changes in formaldehyde emission were less significant, probably due to the incorporation of sodium bisulphite in polymeric matrix. The type of formaldehyde-based resin and the form of scavenger addition are the major factors affecting formaldehyde scavenging efficiency.

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Sulfites, Thiosulfates, and Dithionites

Abstract: The article contains sections titled: 1. Sulfites and Disulfites 1.1. General Properties … Show more

Cited by 11 publications

References 12 publications

Synthesis of Deliquescent Lithium Sulfide in Air

Synthesis of Deliquescent Lithium Sulfide in Air

A preservative with bleaching and emulsifying effects

Sodium metabisulphite as a scavenger of air pollutants for wood-based building materials

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