Methyl Acrylate by Pyrolysis of Methyl Acetoxypropionate

Abstract

The physical test data for 40-, 60-, and 90-minute cures at 259" F. of stocks exposed to these conditions are shown in Figure 7. This chart indicates an increase in the rate of cure due to an increase in humidity, but little change in optimum physical properties.It is apparent from this investigation and the work of the Carbon Black Komenclature Committee on GR-S compounds, as well as from data on natural rubber, that the presence of moisture has an influence on the rate of cure'which cannot be ignored; considerable attention, therefore, should be given to conditions during testing when working up specifications for evaluating GR-S compounds. The work on natural rubber involved other accel-erators than thiazoles, however, and data with stocks using di-otolylguanidine a~ accelerator showed a retardation of cure rather than an acceleration due to increase in moisture content. This would indicate that further work should be done along this same line to find the effect of other types of acceleration. LITERATURE CITED(1) Braendle, H. A,, and Wiegand, W. B., IND. ENQ. Cmnx., 36, 724(2) Hall and Rall, ORD Report (1944).(3) Physical Testing Comm. Div. of Rubber Chem., A.C.S., Rubber (1944). Methyl AcetoxyEFFECT HE pyrogenic transformation of a lactic acid derivative (4, 17, 18, 19),

Bio‐Acrylates Production: Recent Catalytic Advances and Perspectives of the Use of Lactic Acid and Their Derivates

“…about 500–550 °C using LHSV in the range of 0.7–1.9 h −1 . Reported data on methyl acetoxy‐propionate pyrolysis show high acrylate selectivity around 85–100 % at 80–100 % conversion ,,…”

“…Reported data on methyl acetoxy-propionate pyrolysis show high acrylate selectivity around 85-100 % at 80-100 % conversion. [151,194,[196][197][198][199][200]…”

Combining Bio- and Chemo-catalysis for the Sustainable Production of Chemicals

“…Burns et al firstly used LA as raw material to produce acrylic acid (AA) in 1935 [126], and this was followed by Fisher and co-workers in the 1940s [127] and a patent led in 1949 by Atwood [128]. Holmen reported the one-step conversion of LA into acrylic acid via direct dehydration over CaSO 4 /Na 2 SO 4 heterogeneous catalyst, and 68 % yield of AA was obtained at 400°C [129].…”

Routes to Potential Bioproducts from Lignocellulosic Biomass Lignin and Hemicelluloses

“…Walkup et al reported a production yield of 53% methyl acrylate from dehydration of methyl lactate using CaSO 4 catalysts [108]. Methyl lactate can react with acetic anhydride via acetoxylation at low temperature to form methyl alpha-acetoxy propionate, and the ester is subsequently pyrolyzed to methyl acrylate and acetic acid at high temperature (500-550°C) [109,110]. Lilga et al patented a process for acetoxylation of lactic acid with acetic acid and achieved a greater than 90% yield of 2-acetoxy propionic acid [109].…”