Synthesis of Methyl Acrylate by Aldol Condensation of Methyl Acetate with Formaldehyde Over Al2O3-Supported Barium Catalyst

Experimental and Theoretical Study for Vapor Phase Aldol Condensation of Methyl Acetate and Formaldehyde over Alkali Metal Oxides Supported on SBA-15

“…The catalytic performance of SBA-15 and M/SBA-15 in the vapor phase aldol condensation of Ma and FA was evaluated under the following conditions: T = 663 K; liquid hourly space velocity (LHSV) = 1.8 h –1 ; Ma:FA:methanol = 1:2:2 (molar ratio). The selection of the reaction conditions was based on references, ,,, in which Cs/SBA-15, Cs–P/γ-Al 2 O 3 , V–P oxides, and Ba/Al 2 O 3 were used as catalysts, and the reaction was usually conducted at T = 643–663 K and LHSV = 1.2–1.8 h –1 .…”

Vapor phase aldol condensation of methyl acetate with formaldehyde over a Ba–La/Al2O3 catalyst: the stabilizing role of La and effect of acid–base properties

“…This result is agreement with our previous research. 33 When adding 0.5 wt% La 2 O 3 to 5Ba/Al 2 O 3 , the 5Ba-0.5La/Al 2 O 3 catalyst did not show a marked increase in catalytic activity and selectivity. However, it should be noted that, compared with adding individual components, a combination of the two promoters showed higher catalytic stability since the decline in catalytic activity in 5Ba-0.5La/Al 2 O 3 was not so sharp as in 5Ba/Al 2 O 3 and Al 2 O 3 .…”

“…And in our previous studies, we have shown that the medium acid-base sites is more suitable for the aldol condensation reaction. 33 Therefore, we only reported the Ba-La-modied Al 2 O 3 catalysts. The evaluation results of the studied catalysts are presented in Fig.…”

“…In our previous studies, the proper acid-base properties, such as the number and strength of the catalysts, were critical to promoting this aldol condensation reaction. 33 Therefore, too much or too little load may cause the acid-base environment of the catalyst to not be suitable for the target reaction.…”

Highly Efficient and Atom Economic Route for the Production of Methyl Acrylate and Acetic Acid from a Biorefinery Side Stream

“…Alternatively, 3-hydroxy­propionic acid can be dehydrated to acrylic acid (AA) first, − which can then be esterified to MA. Methyl lactate can be converted to MA, although here the hydroxy group has to be transformed into a leaving group in a separate step. , Another route toward renewable MA is the condensation of methyl acetate with formaldehyde. − In fact, acetic acid itself can be converted to AA via reaction with formaldehyde, which can be esterified to MA. None of these processes have thus far been implemented on a large scale.…”