A novel solid acid for synthesis of bisphenol A

Abstract

A novel solid acid was prepared from boric, phosphorous and sulfuric acid by a simple method, and characterized by FT-IR, XRD and TG. Surprisingly, the prepared solid acid is an effective catalyst for the synthesis of bisphenol A from condensation of phenol with acetone. The high conversion of acetone (91.8%) and selectivity of bisphenol A (93.4%) were achieved in the presence of the novel catalyst.

Environmentally Compliant Vinyl Ester Resin (VER) Composite Matrix Resin Derived from Renewable Resources

“…The results also showed the need for continued refinement of lignin hydrolysis and pyrolysis reactions in order to increase the yield of purified phenolic products from about 10% to values potentially exceeding 45%. This probability of our meeting the goal is supported by several recent literature references which discussed production of phenolic products from lignin, by means of supercritical water hydrolysis, in overall yields exceeding 50 % [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

“…Nafion (perfluorinated resin sulphonic acid) is an alternative recyclable heterogeneous catalyst that is also highly efficient for the same condensation. However, milder Lewis acids such as Zeolite or acidic ion-exchange resins saturated with cystamine have been shown to catalyze the condensation with greater BPA selectivity and fewer side-reaction products [14][15][16][17][18][19][20].…”

Cs salt of tungstophosphoric acid-promoted zirconium titanium phosphate solid acid catalyst: An active catalyst for the synthesis of bisphenols

“…This is mainly due to the deactivation of catalyst with the formation of water during the reactions (scheme 1). 7 Also, to know the effect of reaction temperature on the conversion of phenol and selectivity towards BPA and BPF, we have carried out the experiments with fixed catalyst concentration, molar ratio of phenol to ketone/aldehyde in a range of reaction temperatures from 60-90 • C. As mentioned in table 5, conversion of phenol in both the coupling reactions is increases with increase in temperature, but the selectivity of BPA and BPF decreases which is in good agreement with the report by Das et al 6 Recyclability test was performed thrice by activating the used 60 CsTPA-ZTP catalyst. After the first experiment, the catalyst was washed several times with acetonitrile and dried at 110 • C overnight.…”

“…1 Hou et al reported the * For correspondence design of inorganic mixed oxide catalyst for bisphenol A synthesis. 7 They made a successful demonstration of the mixed oxide of phosphoric, boric and sulphuric acids (P:B:S ratio is 1:2:3) calcined at 100 • C in vacuum which showed 81.6% of bisphenol A yield. However, this catalyst had a drawback of deactivation due to loss of sulphuric acid.…”

Bis (2‐mercapto‐ethyl) amine modification of macroporous sulfonic resin catalyst in bisphenol‐a synthesis

“…Currently, the industry standard is the use of a cation exchange resin. In recent years, new catalysts, such as acid functionalized mesoporous [3][4][5] heteropoly acids, [6][7][8][9] ion liquids, 10 and zeolites, 11,12 have also attracted researchers' great attention. However, most of the new catalysts are still under research.…”