styrene monomer process

An overhead ethyl benzene stream is separated from zone 11 via line 12 and can be recycled to oxidation zone 1. Styrene is employed in the manufacture of polystyrene, an important plastic, as well as a In the production of styrene formed gaseous and liquid wastes. What is styrene monomer and how is it used? % volatiles are separated and cracked to form styrene monomer. In this embodiment, the distillate fraction passes to dehydration zone 16 wherein components of the distillate are cracked and/or dehydrated to provide supplemental styrene monomer values. The process of claim 1 wherein said organic phase having a reduced sodium content is subjected to wiped film evaporation, up to 40 wt. and comprises by weight about 83% MBA, 10% ACP and 7% others which are mainly oxygenated aryl compounds. 3,351,635. and passes therefrom at the rate of 2,200 lbs./hr. which are appropriate for vaporization of light materials. styrene monomer (SM), respectively. Unreacted EB is distilled overhead at the rate of 280,000 lbs./hr. Oxidation conditions in reactor 1 are 135°-145° C. and 50-55 psig; residence time is 1.45 hr. As such, the two production processes are often highly integrated. Suitably, a small amount of alkali is incorporated in the oxidation mixture as provided in U.S. Pat. The relative ease of polymerization of styrene can be explained by resonance stabilization of the growing polystyrene in its transition state. The composition by weight of this stream is about 80% styrene, 5% MBA, 11% ACP and 4% others, and styrene is recovered therefrom by conventional means. 3. propylene along with 43,000 lb./hr. The composition by weight of the overhead stream is about 87% MBA, 11% ACP and 2% others which are mainly oxygenated compounds. This valuable monomer is flammable, reactive and toxic. Suspension and solution polymerization are also common. Shell Internationale Research Maatschappij B.V. 라이온델 케미칼 테크놀로지, 엘.피. The process of the invention involves treating the low value stream with aqueous acid and phase separating the resulting mixture into an aqueous phase containing most of the sodium previously associated with the low value stream and an organic stream phase having reduced sodium content. The bottoms stream from zone 11 comprised of 1-phenyl ethanol, acetophenone and heavies passes via line 13 to distillation zone 14. 3,439,001, product propylene oxide, and product 1-phenyl ethanol leaving a heavy organic sodium-containing low value product stream. Le styrène monomère est un adjuvant permettant de fluidifier les résines et gelcoats polyester. Also, the heavy materials from the cracking are useful as fuel. Generally, the reaction mixture is first distilled to separate unreacted propylene overhead from heavier components. The vast majority of styrene is produced from ethylbenzene, and almost all ethylbenzene produced worldwide is intended for styrene production. A heavies stream containing 130 ppm sodium is recovered via line 20 at the rate of 4,900 lbs./hr. The heavy bottoms from the wiped film evaporation is, itself, useful as an upgraded fuel by virtue of the low sodium content thereof. The process of claim 1 wherein the said aqueous acid is aqueous sulfuric acid. The reaction mixture from reactor 1 comprised of unreacted ethylbenzene, ethylbenzene hydroperoxide, 1-phenyl ethanol, acetophenone and heavies passes via line 4 to epoxidation reactor 5 wherein the ethylbenzene hydroperoxide is catalytically reacted with propylene introduced via line 6 to form propylene oxide.