Ethyl acrylate mfr. from ethylene and acrylic acid in sulphuric acid - which is recycled after removal of polymerisation initiator in thin film evaporator

Ethyl acrylate mfr. from ethylene and acrylic acid in sulphuric acid - which is recycled after removal of polymerisation initiator in thin film evaporator

Ethyl acrylate (I) mfr. involves (a) reacting C2H4 and acrylic acid in the presence of H2SO4, (b) sepg. the reaction prod. into crude (I) and a H2SO4 residue (II), (c) partial purificn. of (I) by removing material forming light ends, (d) complete purificn. and isolation of (I), leaving a (I)-prod. r...

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Bibliographische Detailangaben
Hauptverfasser: W. WILKISON,WILLIAM, A. HERMES,MICHAEL, D. CHASE,JOSEPH, D. BOSCH,MARTIN
Format: Patent
Sprache:eng ; ger
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Zusammenfassung:Ethyl acrylate (I) mfr. involves (a) reacting C2H4 and acrylic acid in the presence of H2SO4, (b) sepg. the reaction prod. into crude (I) and a H2SO4 residue (II), (c) partial purificn. of (I) by removing material forming light ends, (d) complete purificn. and isolation of (I), leaving a (I)-prod. residue (III), and (e) recycling most of (II) from (b) to (a). The novelty is that the rest of (II) is supplied to an evaporator with distributor brushes or vanes, where it is heated initially to 149-182 (163-177) deg.C and then cooled to 110-138 (115.6-135) deg.C before removal from the process. This treatment of (II) removes polymerisation initiators from the system.