Apparatus for making (DL) pantolactone

Details Apparatus for making (DL) pantolactone Apparatus for making (DL) pantolactone

1976-10-15

1978-06-20

Tayman, Jr., James H.

Chemistry: physical processes

Physical processes

Crystallization

23263, 23288E, 23252A, B01J 100

Patent

active

040959520

ABSTRACT:
An apparatus for making DL-pantolactone in a continuous process comprises the following parts and setup:
A circulation heater and a circulation reactor, means for introducing the components into the reactor, a heat-exchanger forming part of the circulation reactor, a longitudinal aftertreatment reactor and a final longitudinal reactor comprising dual reaction chambers with means for applying heat and pressure in the first chamber and maintaining the reaction product in the second chamber at such heat and pressure. The apparatus may also include a chamber for forming a premix of some of the components with a subsequent cooling device prior to the introduction into the circulation reactor. It may furthermore include a stripping column and pulsation column for recovering the final product from the solution.

REFERENCES:
patent: 2332527 (1943-10-01), Pyzel
patent: 2767068 (1956-10-01), Maycock et al.
patent: 3462850 (1969-08-01), Galer
patent: 3529026 (1970-09-01), Blumcke et al.

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