The first one is about Alternatives to sulfuric acid, hydrofluoric acid catalyst liquid. Efficient solid acid catalyst both for existing industrial production, or from environmental considerations are very important, especially for those using a liquid acid such as H2SO4, hydrofluoric acid and AlCl3 as the process liquid acid catalyst. In recent years, taking into account the heterogeneous and heterogeneous acid catalysis play a decisive role in the acid site (center) of the similarities between, according to the theory of modern homogeneous acid catalysis by different acid sites (L acid B acid, super acid) analysis of the nature of a strong acid catalyst presents a unified acid structure model as a basis, we can cut some of the strong acid catalyst.

The second, this article is about self-assembly of hydrofluoric acid doped polyaniline micro / nanotubes. Hydrofluoric acid as a dopant-free template method had high conductivity (10-2-10-1S / cm) polyaniline micro / nano tubes (d = 85-420nm). When the [HF] / [An] = 0.5 the resulting micro / nanotubes formed chance of up to 100% was found micro / nano-tube diameter and conductivity increased with [HF] / [An] proportion increases .FTIR, UV-Vis, XRD Characterization of proved the resulting polyaniline micro / nanotubes doped state.

The last one is about hydrofluoric acid treatment on β zeolite catalyst alkylation.With different concentrations of β-hydrofluoric acid solution treated zeolite catalyst, when the concentration of HF is low, especially the catalyst species and crystal unstable framework aluminum is dissolved, the bridge is substituted hydroxyl F., Pore volume and increase the specific surface area, total reducing the amount of acid. With the HF concentration continues to increase, a strong B acid did not change significantly, increasing the amount of strong acid L, this is because the strong B acid mainly from silicon defects hydroxyl group, a strong acid is formed from L AlF3 or other aluminum species. Fluorination catalyst pore volume and depth were reduced specific surface area, zeolite β is dissolved at this time. Catalyst life depends on the catalyst surface area and pore volume, rather than the amount of acid. When the fluorine content of 0.5%, the pore volume and maximum catalyst, where the catalyst life increased by about 30 percent over the surface area.