Heterogeneous para-phenylamino sulfonic acid ligand functionalized on MCM-41 derived from rice husk ash: Selective mono-alkylated products of tert-butylation of phenol

Synthesis and Characterisation of Rice Husk Ash Silica Drug Carrier for α-Mangostin

“…The RHA silica modified with metals and organic compounds have been successfully used as heterogeneous catalysts in various catalytic processes. [6][7][8] However, no reports can be found on the use of RHA silica as a drug carrier. This prompted an investigation on the feasibility of RHA silica as a drug carrier for α-mangostin and herein we report our findings.…”

A novel green process for tannic acid hydrolysis using an internally sulfonated hollow polystyrene sphere as catalyst

“…Other reaction conditions included a reaction temperature of 80 C, a reaction time of 6 h, a molar ratio of tannic acid to H 2 O of 1 : 3, and polystyrene hollow sphere loading of 7% w/w. [22][23][24][25] The experimental results indicate that the catalyst is stable enough to be recycled for many times. However, it is worth noting that the yield rate decreases slightly aer the catalyst has been reused for 8 times.…”

Functionalized MCM‐41: Versatile Catalysts for Organic Transformations

“…Adam et al [65] have reported 3-(4aminophenylamino)propane-1-sulfonic acid immobilized on tailored MCM-41 nanoparticles(MCM-41-NHPhSO 3 H) for liquidphase Friedel Craft reaction of phenol and tertiary butyl alcohol to afford tertiary butyl phenol (TBP) (Figure 27). The catalyst was found to be reusable after several rounds of reaction.…”