Sodium Hydrogen Sulfide

Dittmer, Donald C.

doi:10.1002/047084289x.rs080

Cited by 2 publications

(3 citation statements)

References 23 publications

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“…If hydroxide is in a concentration range sufficient to react with all the H 2 S and CO 2 , a solution composed of HS – and HCO 3 – will be formed. The latter being a much stronger acid (p K a 10.3) than the hydrosulfide (p K a above 14 , ), the pH of the solution would hence be buffered to ca. 10.3, in phase with the pH of this effluent systematically being measured at 10.5.…”

Section: Resultsmentioning

confidence: 83%

Continuous Extraction of Black Liquor Salts under Hydrothermal Conditions

Wang

Deplazes

Vogel

et al. 2021

Ind. Eng. Chem. Res.

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In hydrothermal valorization of black liquor (BL) from the Kraft process, the separation of inorganic salts is pivotal to prevent them from fouling downstream equipment such as reactors and for the cost-efficient recycling of salts into pulp cooking chemicals. In this work, the phase behavior of the inorganic salts present in BL was studied in supercritical water and the conditions for the separation from BL were optimized. A high-pressure differential scanning calorimetry study indicated the concomitant precipitation of salts and the formation of a second salt-rich liquid-like phase. The potassium-to-sodium ratio was found to strongly impact the phase behavior of the salt mixture. Potassium was found to prevent salt precipitation and to lead to the formation of a second liquid-like phase alone. At K/(K + Na) ≥ 0.4, a steady salt separation could be achieved, enabling the continuous extraction of up to 96% of the salts in a concentrated brine effluent.

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Section: Resultsmentioning

confidence: 83%

Continuous Extraction of Black Liquor Salts under Hydrothermal Conditions

Wang

Deplazes

Vogel

et al. 2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Next, we turned towards the preparation of bisbenzylthio systems. In this regard, several dibromides were successfully converted into bis(benzylthio) derivatives (19)(20)(21)(22)(23)(24) in good to excellent yields (Scheme 4). The single-crystal structures for 20a and 21b are presented in Fig.…”

Section: Substrate Scopementioning

confidence: 99%

“… 18 Sodium hydrosulfide (NaHS), highly hygroscopic and difficult to handle, is a source for HS − which leads to the formation of thiols and hence adding one more step towards preparing sulfides. 19 KSCN leads to thiocyanate products as well as isothiocyanate products. 20 Potassium ethyl xanthate leads to sulfides in two steps under heating conditions and several byproducts were observed as reported by Fochi et al 21 Therefore, in light of these limitations, we have chosen potassium thioacetate as our reagent due to its capacity of preparing versatile sulfides without involving thiols in a single-pot at room temperature as explored in this manuscript.…”

Section: Introductionmentioning

confidence: 99%