Klason lignin content in wood was determined according to Runkel and Wilke (21) using 72 percent sulfuric acid and 40 percent hydrobromic
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acid (40%, 20.0 ml, 0.10 mol) was added into the mixture and refluxed at 120[degrees]C for 72 h.
This study aims at exploring the transport properties of hydrochloric acid and hydrobromic
acid in a dipolar fluoropolymer, poly(ethylene-co-chlorotrifluoroethylene) (ECTFE) (two grades), and a hydrogen bonding fluoropolymer, poly(vinylidene fluoride) PVDF (four grades) (Table 1).
The typically used mineral acids are sulfuric acid [30-33, 37, 38, 40-43, 56, 57], hydrochloric acid [58, 59], phosphoric acid [35, 60], hydrobromic
acid , and their mixed acids [34, 36].
hydrochloride (0.5 g, 1.49 mmol) was dissolved in aqueous hydrobromic
Halogens in the exhaust gas, in combination with water vapour, yield hydrochloric acid, hydrobromic
acid or hydrofluoric acid.
Accordingly, iterative use of commercially available vinylmagnesium bromide (2), 47% hydrobromic
acid, and methyl acetoacetate (3) enables us to prepare 1 from all commercially available 2-hexanone (4, Fig.