Process and an apparatus for the crystallization of melts with a

Details Process and an apparatus for the crystallization of melts with a Process and an apparatus for the crystallization of melts with a

1981-09-24

1983-08-23

Bernstein, Hiram H.

Chemistry: physical processes

Physical processes

Crystallization

422254, 198662, 366 90, 260707, B01D 902

Patent

active

044001754

ABSTRACT:
The product which is present in the form of a melt is cooled and thereby crystallized in a double-shaft worm machine which has self-cleaning worm shafts rotating in the same direction. The crystallizing material is continually crushed in a repeatedly cutting manner during solidification and during the subsequent cooling operation, while maintaining the main transporting direction in the worm. In this manner, crystal agglomerates are prevented from forming which have only solidified on the surface, while still containing liquid portions inside. The process is carried out using a worm machine, the worm profile of which is repeatedly interrupted by introducing grooves, so that only small segment ridges remain.

REFERENCES:
patent: 2598449 (1952-05-01), Scott et al.
patent: 2679539 (1954-05-01), McKay
patent: 2778482 (1957-01-01), Lasch et al.
patent: 3504400 (1970-04-01), Natov et al.
patent: 3652064 (1972-03-01), Lehnen et al.
patent: 3885665 (1975-05-01), Fisher

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