초록 ▼

A process for producing acrylic ester by the catalytic esterification of a crude liquid stream of enriched acrylic acid recovered by the partial condensation of the reaction gas effluent from the catalytic oxidation of propylene and/or acrolein. The partial condensation allows a significant proporti

A process for producing acrylic ester by the catalytic esterification of a crude liquid stream of enriched acrylic acid recovered by the partial condensation of the reaction gas effluent from the catalytic oxidation of propylene and/or acrolein. The partial condensation allows a significant proportion of volatile aldehydes and water to pass through the first recovery stage to a second stage for conventional recovery, along with uncondensed acrylic acid vapors and the remainder of the uncondensed reaction gases.

대표청구항 ▼

In a process for producing acrylic ester comprising the steps of: (1) oxidizing propylene or acrolein in the presence of a catalyst to obtain a reaction gas effluent stream containing an acrylic acid fraction; (2) condensing said reaction gas stream to obtain a condensed crude acrylic acid solution;

In a process for producing acrylic ester comprising the steps of: (1) oxidizing propylene or acrolein in the presence of a catalyst to obtain a reaction gas effluent stream containing an acrylic acid fraction; (2) condensing said reaction gas stream to obtain a condensed crude acrylic acid solution; (3) refining said condensed crude acrylic acid solution; and (4) reacting the refined acrylic acid solution obtained according to Step (3) above with an alcohol in the presence of a catalyst to produce acrylic ester and water; the improvement which comprises eliminating or greatly minimizing said refining Step (3) by (A) partially condensing said reaction gas stream of Step (1) above to obtain (i) a first crude liquid stream of an enriched acrylic acid solution containing about 10 to about 90% of said acrylic acid fraction and (ii) a second uncondensed reaction gas stream containing from about 90 to about 10% of said acrylic acid fraction; and (B) without first having combined said obtained crude liquid stream of enriched acrylic acid solution with any additional crude liquid acrylic acid obtained by condensing said second uncondensed reaction gas stream defined above, and also either without having first refined said obtained crude liquid stream of enriched acrylic acid solution, or after essentially having removed only some aldehyde and/or water byproduct from said obtained crude liquid stream of enriched acrylic acid solution; employing said obtained crude liquid stream of enriched acrylic acid solution as the acrylic acid starting material reactant for the esterification process of Step (4) above.