Catalytic dehydration of lactic acid to acrylic acid using calcium hydroxyapatite catalysts

Facile synthesis of crystalline nanoporous Mg3(PO4)2 and its application to aerobic oxidation of alcohols

“…Magnesium phosphate is one of the important materials used for various biological applications related to bone and tissue engineering, and molecular level DNA delivery in the cells [2][3][4]. Further, the co-existence of acid sites along with strong basic sites in the material makes it suitable for various bi-functional organic transformations as catalyst [5]. While synthesis and structural chemistry of this material is well studied, its applications to catalysis are not much explored.…”

Dehydration of ethyl lactate over alkaline earth phosphates: Performances, effect of water on reaction pathways and active sites

“…Other efficient catalysts for LA dehydration are sulphates [17], alkaline earth phosphates [18][19][20][21] and hydroxyapatites [22][23][24]. Recently, we have shown that selective alkaline earth phosphates contained mostly acidic and basic sites with similar weak strength.…”

Vapor-phase catalytic dehydration of lactic acid to acrylic acid over nano-crystalline cerium phosphate catalysts

“…Ghantani et al prepared various HAp catalysts by changing Ca/P molar ratio at different pHs and reported a maximum of 60 % selectivity towards AA [17]. Matsura et al recently reported a high AA yield of about 80 % [19].…”

“…10b) compared to the FT-IR spectra of the calcined CeP(2.5), which correspond to C=O stretching and C-H stretching frequencies. These are formed probably due to the formation of lactates and acrylates from LA, AA and other residing products [17].…”

“…Several authors reported in the literature recently on the dehydration of LA to AA over hydroxyapatite (HAp) catalysts [16][17][18][19] and Na-Y zeolites [20][21][22][23]. Ghantani et al prepared various HAp catalysts by changing Ca/P molar ratio at different pHs and reported a maximum of 60 % selectivity towards AA [17].…”