IT1088470B - Continuous crystallisation process - has several crystalliser units in series with counterflow through them and rising flow classification in crystal outlet (NO 27.12.77) - Google Patents

Continuous crystallisation process - has several crystalliser units in series with counterflow through them and rising flow classification in crystal outlet (NO 27.12.77)

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Publication number
IT1088470B
IT1088470B IT2990477A IT2990477A IT1088470B IT 1088470 B IT1088470 B IT 1088470B IT 2990477 A IT2990477 A IT 2990477A IT 2990477 A IT2990477 A IT 2990477A IT 1088470 B IT1088470 B IT 1088470B
Authority
IT
Italy
Prior art keywords
series
stage
crystalliser
counterflow
units
Prior art date
Application number
IT2990477A
Other languages
Italian (it)
Original Assignee
Inst Atomenergie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inst Atomenergie filed Critical Inst Atomenergie
Priority to IT2990477A priority Critical patent/IT1088470B/en
Application granted granted Critical
Publication of IT1088470B publication Critical patent/IT1088470B/en

Links

Abstract

Crystallisation process contains a series of stages in each of which partial crystallisation occurs. The mixture enters a separation stage, as it leaves the final stage. There is a separation between fine crystals and the coarser ones required as product by maintaining an upwards velocity of feed liquor in the crystal outlet passage. The coarse crystals from each stage are fed back to the previous stage on that there is a gradual growth of crystals from one end of the process to the other. The crystal product is taken off in equilibrium with the saturated feed liquor while the spent liquor leaves from the other end of the process. Used for industrial crystallisations esp. of Al(OH)3. The process is simple and economic, it gives a uniform product of reasonable size and is not sensitive to other process variations.
IT2990477A 1977-11-22 1977-11-22 Continuous crystallisation process - has several crystalliser units in series with counterflow through them and rising flow classification in crystal outlet (NO 27.12.77) IT1088470B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT2990477A IT1088470B (en) 1977-11-22 1977-11-22 Continuous crystallisation process - has several crystalliser units in series with counterflow through them and rising flow classification in crystal outlet (NO 27.12.77)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2990477A IT1088470B (en) 1977-11-22 1977-11-22 Continuous crystallisation process - has several crystalliser units in series with counterflow through them and rising flow classification in crystal outlet (NO 27.12.77)

Publications (1)

Publication Number Publication Date
IT1088470B true IT1088470B (en) 1985-06-10

Family

ID=11228642

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2990477A IT1088470B (en) 1977-11-22 1977-11-22 Continuous crystallisation process - has several crystalliser units in series with counterflow through them and rising flow classification in crystal outlet (NO 27.12.77)

Country Status (1)

Country Link
IT (1) IT1088470B (en)

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