Reactor and continuous process to be carried out therewith for t

Details Reactor and continuous process to be carried out therewith for t Reactor and continuous process to be carried out therewith for t

Filed on

1994-05-31

Date issued

1996-04-16

Examiner

Tsang, Cecilia

Patent Class

Organic compounds -- part of the class 532-570 series

SubClass

Organic compounds

SubSubClass

Heterocyclic carbon compounds containing a hetero ring...

Other Related Categories

549229, 549230, C07D32100, C07D32300, C07D31738

Type

Patent

Status

active

Patent number

055084427

Description

ABSTRACT:
A bubble column reactor is described which is characterized by a slenderness ratio at a ratio of height to diameter of 2 to 50, a feed, at the bottom end of the bubble column, for the ethylene glycol carbonate (EGG) or propylene glycol carbonate (PGC) already present serving as reaction medium, one or more metering sites for the starting materials CO.sub.2 and ethylene oxide (EOX) or propylene oxide (POX) above the feed for the reaction medium, an outlet for the reaction mixture at the top end of the bubble column, a dividing apparatus connected thereto for the reaction mixture flowing off for dividing it into reaction mixture to be taken off and worked up on the one hand and reaction mixture to be recycled on the other hand and additionally a return line to the feed for the reaction mixture to be recycled. This bubble column reactor can be advantageously used in a process for the continuous preparation of EGG or PGC which is carried out in the temperature range from 100.degree. to 200.degree. C., in the pressure range from 5 to 200 bar and at a molar ratio of 1.01 to 1.5 mol of CO.sub.2 per mol of alkylene oxide in EGG or PGC already present as reaction medium in an amount which is 7 to 350 times that of the newly formed EGG or PGC.

REFERENCES:
patent: 4314945 (1982-02-01), McMullen et al.
Schulze, Chem. Abst. 78-6020 (1972).
Extrait de Brevet Russe (Derwent), Russian Patent No. 172,342; one page; "Method for the prepn. of Alkylene Carbonates". (1965).
Japanese Abstract, vol. 6, No. 197, 1 page, C-128, Oct. 6, 1982; "Preparation of Alkylene Glycol", Nippon Shokubai Kagaku Kogyo KK, K. Arasaki; 57-106631(A).
Chemical Abstracts, vol. 99, 1983, p. 102; CA #141920f: "Thermostatted reactor for ethylene carbonate synthesis", M. Scurtu.
Chemi-Ingenieur-Techn., vol. 43, No. 16, 1971; "Athylen-und Propylencarbonat", G. Hechler, pp. 903-905.
Industrial and Engineering Chemistry, vol. 50, No. 5, 5/1958, pp. 767-770; "Preparation and Properties of the Alkylen Carbonates", W. J. Peppel.
Fette-Seifen-Anstrichmittel, vol. 76, No. 6, 1971, pp. 396-399; "Die Technishe Herstellung von Athylencarbonat", H. Pringmann.

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