Acrylic acid flow sheet

Acrylic Acid Recovery. The process flow sheet (Fig. 3) shows equipment and conditions for the separations step. The acryUc acid is extracted from the absorber effluent with a solvent, such as butyl acetate, xylene, diisobutyl ketone, or mixtures, chosen for high selectivity for acryUc acid and low solubihty for water and by-products. The extraction is performed using 5—10 theoretical stages in a tower or centrifiigal extractor (46,61—65). 

Industrial operations take place in two steps with die initial production of acrylic acid, followed by. esterification to the acrylate in a separate facility. The flow sheet of the acid production section comprises the following mam operations ... 

Esters of methacrylic acid are obtained directly from acetone cyanohydrin by reaction of the latter with concentrated sulfuric acid to give methacrylamide sulfate, followed by reaction with an alcohol. The process is continuous and the methacrylamide sulfate is not isolated. Acetone cyanohydrin is derived from acetone and hydrogen cyanide (Pig. 15-39), Polymerization Procedures. Of particular importmice to the acrylics is the cast or bulk method of polymerization. This method is employed to produce cast polymethyl methacrylate sheets which are widely used in industrial applications. Careful control of polymerization is required to obtain a bubble-free product with good optical clarity. A typical flow sheet for the production of cast eet is shown in fig. lfi-40. Solution, suspension, and particularly emulsion polymerizations are also, widely used with the acrylics. Such polymerization reactions involve relatively conventional batch-type processes. i... 

Trade Names Containing Aculyn 88 Carbosel 514H Carbosel 531 Dispar-Ion 1970 Disparlon OX-60 Disparlon OX-70 Diaparlon OX-881 Moda-flow AQ-3025 Resin Nuosperse 15 Sarcryl CN 816 TEGO Flow 300 TEGO Flow ZFS 460 See also Polyacrylic acid Acrylic sheet. See Acrylic resin Acrylinoleic acid. See Cyclocarboxypropyloleic acid 2-Acryloylamido-2-methylpropanesulfonic acid monomer. See 2-Acrylamido-2-methylpropanesulfonic acid ACS. See Ammonium cumenesulfonate Activated alumina Activated aluminum oxide. See Alumina N-(Acylcolaminoformulmethyl) pyridinium chloride. See Lapytium chloride Acyl lactylates Ionic Nature Anionic... 

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