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US 2024/0189738 A1Published application
Method And Device For Crystallising And Separating Substances
AssigneeI-aim-I GmbH
InventorsShangli Cheng, Bo Cheng
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Abstract
The present invention relates to a crystallisation method and a crystallisation arrangement for crystallising a substance from a solution, in particular for resolution of racemates.
Claims15
1:
- A method for crystallizing and separating a substance from a solution in which the substance is present, and in particular is dissolved supersaturated, the method comprising the steps of:
- a) introducing the solution comprising the substance into a receiving volume of a process vessel (12) of a crystallization arrangement (10), the solution having a temperature T1 after introduction;
- b) providing a crystallization insert (21) with at least one carrier (16) for insertion into the process vessel (12), wherein the surface of the carrier (16) is provided with seed crystals (18) for the substance for crystal growth in such a way that the seed crystals (18) are immobilized on the surface of the carrier (16) of the crystallization insert (21), and wherein at least one carrier (16) has a spiral shape;
- c) positioning the crystallization insert (21) in a receptacle (14) of the crystallization device (10) in such a way that the carrier (16) can be brought into contact with the solution;
- d) optionally cooling the seed crystals (18) while adjusting the temperature at the seed crystals (18) to a temperature T2, wherein T2 is lower than T1;
- e) crystallization of the substance on the surface of the seed crystals (18);
- and
- f) optionally, isolating the formed crystals of the substance in the process vessel (12).
5 more elements
2:
- The method according to claim 1, wherein a crystallization surface of 0.5 cm2 to 5 cm2 per 1 cm3 of the receiving volume is present in at least part of the receiving volume.
3:
- The method according to claim 1, wherein the method comprises method step f) and method step f) comprises the method steps:
- f1) detaching substance crystallized on the seed crystals (18) from the carrier (16) within the process vessel (12);
- f2) removing of solution from the formed crystals;
- f3) optionally cleaning the formed crystals;
- and
- f4) drying of the crystals.
3 more elements
4:
- The method according to claim 3, wherein at least one of the method steps f2) and f3) comprises filtering the solution together with crystals present in the solution for collecting the crystals on a filter (24), in particular in the process vessel (12).
5:
- The method according to claim 1, wherein an arrangement (28) of a process vessel (12), a collecting vessel (30) and a filter unit (32) comprising a filter (24) is used for separation, wherein the process vessel (12) and the collecting vessel (30) are attached to the filter unit (32) in a fluid-tight manner and are fluidically connected to each other through the filter (34) such that solution is filtered through the filter (24) from the process vessel (12) into the collecting vessel (30) under vacuum or centrifugal force, wherein solids are retained in the process vessel (12) by the filter (24) and separated from the solution.
6:
- The method according to claim 1, wherein the method is an enantiomer separation, wherein the substance is an enantiomer of a racemic mixture and the solution comprises the racemic mixture.
7:
- The method according to claim 1, wherein the method steps a) to e) are carried out as a common sequence repetitively in a process vessel (12), wherein between two repeating sequences the crystallization insert (21) of the process vessel (12) is exchanged, wherein in a first sequence the carrier (16) comprises a first type of seed crystals (18) and wherein in a second sequence the carrier (16) comprises a second type of seed crystals (18) different from the first type.
8:
- The method according to claim 1, wherein the method steps a) to e) are carried out as a common sequence repetitively in different process vessels (12), wherein the carrier (16) of a first process vessel (12) comprises a first type of seed crystals (18) and wherein the carrier (16) of a second process vessel (12) comprises a second type of seed crystals (18) different from the first type.
9:
- The method according to claim 1, wherein method step a) is carried out at least in part before method step c).
10:
- The method according to claim 1, wherein method step a) is carried out at least in part after method step c).
11:
- A crystallization arrangement (10) for crystallizing at least one substance from a solution, in particular for carrying out a method according to claim 1, the crystallization arrangement comprising a process vessel (12) for receiving the solution and comprising a crystallization insert (21) having at least one carrier (16) for insertion into the process vessel (12), wherein the surface of the carrier (16) is provided with seed crystals (18) for the substance for crystal growth such, that the seed crystals (18) are immobilized on the surface of the carrier (16) of the crystallization insert (21), and wherein at least one carrier (16) has a spiral shape, wherein the process vessel (12) comprises a receptacle (14) for receiving the crystallization insert (21) with the carrier (16), wherein the crystallization insert (21) is non-destructively detachable from the receptacle (14), and wherein the crystallization insert (21) is further positionable in the receptacle (14) such, that the seed crystals (18) are contactable with the solution.
12:
- The crystallization arrangement (10) according to claim 11, wherein the crystallization arrangement (10) comprises a filter (24) for filtering solution present in the process vessel (12).
13:
- The crystallization arrangement according to any claim 11, wherein the carrier (16) is designed as a foil or fabric.
14:
- The crystallization arrangement according to claim 13, wherein the foil or the fabric is provided with through-openings.
15:
- An arrangement (28) comprising a process vessel (12), a collecting vessel (30) and a filter unit (32) comprising a filter (24), wherein the process vessel (12) and the collecting vessel (30) are attached to the filter unit (32) in a fluid-tight manner and are fluidically connected to each other through the filter (24) in such a way, that solution can be filtered from the process vessel (12) into the collecting vessel (30) through the filter (24) under vacuum or centrifugal force, wherein solid is retained by the filter (24) in the process vessel (12) and is separated from the solution.