US3859052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystallization apparatus having pressure-liquid level control means
Assignee: JOH A BENCKISER CHEM FAB GmbH
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Filing: 1972-08-15
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Granted: 1975-01-07
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Expires: 1992-08-15
Abstract
Abstract Crystals are derived from a solution of a crystallizable compound by a thermal circulation system comprising upper and lower chambers, one chamber being under vacuum, the other under conditions other than vacuum. Heat is provided to promote vaporization of the solution and circulation of the liquid. Fresh solution of the compound to be crystallized is selectively supplied to one or both chambers.
Inventors
- 👤 Hans Walther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:34
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0018; B01D9/0022; B01D9/0031; B01D9/0063
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
171 words
A CRYSTALIZATION APPARATUS FOR A LIQUID CONTAINGING A MATERIAL IN SOLUTION COMPRISING; A VACUUM AND A CRYSTALLIZATION CHAMBERS; FIRST AND SECOND CONDUIT MEANS CONNECTING SAID CHAMBERS, AND SAID LIQUID PARTIALLY FILLING EACH OF SAID CHAMBERS AND CIRCULATING FROM SAID VACUMM TO SAID CRYSTALIZATION CHAMBER THROUGH SAID FIRST CONDUIT MEANS AND FROM SAID CRYSTALIZATION TO SAID VACUMM CHAMBER THROUGH SAID SECOND CONDUIT MEANS; MEANS FOR ESTABLISHING IN SAID VACUUM CHAMBER A VACUUM; AND SAID CRYSTALIZATION CHAMBER HAVING MEANS ADAPTED TO CONTROL THE LIQUID LEVEL IN SAID CRYSTALLIZATION CHAMBER RELATIVE TO THE LIQUID LEVEL IN THE VACUUM CHAMBER SAID LAST-NAMED MEANS BEING ADAPTED WITH PRESSURE MEANS CONTROLLING THE PRESSURE IN SAID CRYSTALLIZATION CHAMBER ABOVE ATMOSPHERIC THEREBY CONTROLLING THE LIQUID LEVELS IN THE CRYSTALLIZATION CHAMBER AND THE VACUUM CHAMBER AT PREDETERMINED LEVELS WITH RESPECT TO EACH OTHER; SAID LEVELS BEING ADJUSTED WHEN REQUIRED BY CHANGES IN THE DENSITY OF THE LIQUID BEING CRYSTALLIZED; AND MEANS FOR CAUSING IN SAID SECOND CONDUIT MEANS THE FLOW OF VAPOUR BUBBLES OF SAID SOLUTION TOWARD SAID VACUUM CHAMBER.
Claim 2
Dependent Claim
171 words
A CRYSTALIZATION APPARATUS FOR A LIQUID CONTAINGING A MATERIAL IN SOLUTION COMPRISING; A VACUUM AND A CRYSTALLIZATION CHAMBERS; FIRST AND SECOND CONDUIT MEANS CONNECTING SAID CHAMBERS, AND SAID LIQUID PARTIALLY FILLING EACH OF SAID CHAMBERS AND CIRCULATING FROM SAID VACUMM TO SAID CRYSTALIZATION CHAMBER THROUGH SAID FIRST CONDUIT MEANS AND FROM SAID CRYSTALIZATION TO SAID VACUMM CHAMBER THROUGH SAID SECOND CONDUIT MEANS; MEANS FOR ESTABLISHING IN SAID VACUUM CHAMBER A VACUUM; AND SAID CRYSTALIZATION CHAMBER HAVING MEANS ADAPTED TO CONTROL THE LIQUID LEVEL IN SAID CRYSTALLIZATION CHAMBER RELATIVE TO THE LIQUID LEVEL IN THE VACUUM CHAMBER SAID LAST-NAMED MEANS BEING ADAPTED WITH PRESSURE MEANS CONTROLLING THE PRESSURE IN SAID CRYSTALLIZATION CHAMBER ABOVE ATMOSPHERIC THEREBY CONTROLLING THE LIQUID LEVELS IN THE CRYSTALLIZATION CHAMBER AND THE VACUUM CHAMBER AT PREDETERMINED LEVELS WITH RESPECT TO EACH OTHER; SAID LEVELS BEING ADJUSTED WHEN REQUIRED BY CHANGES IN THE DENSITY OF THE LIQUID BEING CRYSTALLIZED; AND MEANS FOR CAUSING IN SAID SECOND CONDUIT MEANS THE FLOW OF VAPOUR BUBBLES OF SAID SOLUTION TOWARD SAID VACUUM CHAMBER.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 which is provided with agitation means in the crystallization chamber.
Claim 4
Dependent Claim
13 words
The apparatus of claim 1 which is provided with inlet and outlet means.
Claim 5
Dependent Claim
15 words
The apparatus of claim 1 wherein the crystallization chamber is provided with pressure relief means.
Claim 6
Dependent Claim
19 words
The apparatus of claim 1 wherein the crystallization chamber is provided with evacuating means for a suspension of crystals.
Claim 7
Dependent Claim
18 words
The apparatus of claim 1 in which the crystallization chamber is provided with inlet means for fresh liquid.
Claim 8
Dependent Claim
36 words
The apparatus of claim 1 wherein the crystallization chamber is dimensioned to be of such capacity as to be able to contain all of the volume of liquid from which the crystals are to be crystallized.
Claim 9
Dependent Claim
36 words
The apparatus of claim 1 which is provided with automatic means for controlling the liquid level in the crystallization chamber at a preselected level in dependence on the level of the liquid in the vacuum chamber.
Claim 10
Dependent Claim
26 words
The apparatus of claim 1, wherein said bubble causing means comprises heating means for vaporizing a portion of the solution flowing through said second conduit means.
Claim 11
Dependent Claim
23 words
The crystallization apparatus of claim 9 wherein the heating means is in closer proximity to the vacuum chamber than to the crystallization chamber.
Claim 12
Dependent Claim
30 words
The apparatus of claim 9 wherein the open end of the conduit means leading from the crystallization chamber to the heating means extends into the liquid in the crystallization chamber.
Claim 13
Dependent Claim
164 words
A crystallization apparatus for a liquid containing a material in solution to be crystallized comprising; a vacuum and a crystallization chambers; first and second conduit means connecting said chambers, said chambers being adapted to be partially filled by the liquid and said first conduit means being adapted for circulation for the liquid from said vacuum to said crystallization chamber and said second conduit means being adapted for circulation of the liquid from said crystallization to said vacuum chamber; means for establishing in said vacuum chamber a vacuum; and said crystallization chamber being adapted with pressure means controlling the pressure in said crystallization chamber above atmospheric thereby controlling the liquid levels in the crystallization chamber and the vacuum chamber at predetermined levels with respect to each other; said levels being adjusted when required by changes in the density of the liquid being crystallized; and heating means for promoting in said second conduit means the flow of vapor bubbles of said solution toward said vacuum chamber.
Claim 14
Dependent Claim
164 words
A crystallization apparatus for a liquid containing a material in solution to be crystallized comprising; a vacuum and a crystallization chambers; first and second conduit means connecting said chambers, said chambers being adapted to be partially filled by the liquid and said first conduit means being adapted for circulation for the liquid from said vacuum to said crystallization chamber and said second conduit means being adapted for circulation of the liquid from said crystallization to said vacuum chamber; means for establishing in said vacuum chamber a vacuum; and said crystallization chamber being adapted with pressure means controlling the pressure in said crystallization chamber above atmospheric thereby controlling the liquid levels in the crystallization chamber and the vacuum chamber at predetermined levels with respect to each other; said levels being adjusted when required by changes in the density of the liquid being crystallized; and heating means for promoting in said second conduit means the flow of vapor bubbles of said solution toward said vacuum chamber.
Claim 15
Dependent Claim
40 words
The apparatus of claim 12 which is adapted to be operated at constant temperature by adjustment of the pressure means of the crystallization chamber and the pressure means of the vacuum chamber while the specific gravity of the liquid increases.
Claim 16
Independent Claim
41 words
The apparatus of claiim 12 which is adapted to be operated to maintain a constant specific gravity by adjustment of the pressure means of the crystallization chamber and the pressure means of the vacuum chamber while different crystallization temperatures are established.
Claim 17
Independent Claim
41 words
The apparatus of claiim 12 which is adapted to be operated to maintain a constant specific gravity by adjustment of the pressure means of the crystallization chamber and the pressure means of the vacuum chamber while different crystallization temperatures are established.
Claim 18
Dependent Claim
20 words
The apparatus of claim 12 wherein the heating means is positioned in the uppermost part of the second conduit means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |