The method is suitable for an evaporative crystallization system with flaky crystal habit substances
A technology of evaporative crystallization and flaky crystal, which is applied in the field of evaporative crystallization systems, can solve the problems of poor fluidity of crystal particles, electrostatic adsorption, and low loose bulk density, and achieve the effect of thinner thickness
Active Publication Date: 2021-01-01
TIANJIN UNIV +1
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Problems solved by technology
The flake shape and small particle size of the crystal directly lead to poor fluidity of crystal particles, low loose bulk density, and electrostatic adsorption, which seriously affect the quality of crystal particles
Method used
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[0028] The following further illustrates the present application through examples, but not as a limitation to the present invention.
[0029] This application takes betaine with a flaky crystal habit as an example to prove the effect of the evaporative crystallization system applied for in the face of evaporative crystallization of substances with a flaky crystal habit.
[0030] Verify the test equipment schematic diagram of the present invention as attached figure 2 As shown, the description of each component is as follows:
[0031]1) Crystallization kettle: use a jacketed round-bottom glass reaction kettle with an effective volume of about 400mL as the crystallization kettle, with an inner diameter of about 7cm, and an anchor paddle with a diameter of about 5cm as the stirring paddle;
[0032] 2) Insulation straight pipe: use the glass interface between the condenser tube and the crystallization kettle as the insulation straight pipe;
[0033] 3) Condenser: the glass cond...
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Abstract
The method relates to an evaporative crystallization system suitable for use with flaky crystal habit substances. The system is mainly composed of a crystallization kettle and a condenser, the condenser is arranged above an end socket of the crystallization kettle, and the two parts are connected through a heat preservation straight pipe; the upper end of the heat preservation straight pipe is connected with the lower middle end of the condenser, and the distance between an upper end pipe opening and the inner wall face of the condenser is 1-10 mm. The lower end of the condenser is connected with a collector through a vertically downward pipeline, the collector is communicated with the condenser through a bypass pipeline, and the joint of the bypass pipeline and the condenser is kept horizontal; and the upper part of the condenser is communicated with the atmosphere through a pipeline. In the evaporative crystallization process, solvent vapor rises to the condenser from the crystallization kettle and is converted into liquid in the condenser to flow into the collector; no vacuumizing part is arranged in the evaporative crystallization system, so that the pressure in the crystallization kettle is higher than normal pressure, the solution is kept at a higher temperature, the thickness of the obtained flaky crystals is remarkably increased, the bulk density of crystal particles isremarkably improved, and the problem that the flaky crystals are easy to break is solved.
Description
technical field [0001] This application relates to an evaporative crystallization system, especially suitable for evaporative crystallization systems of substances with lamellar crystal habits. Background technique [0002] Evaporative crystallization is a common method for producing solid pure substance raw materials. For substances with flaky crystals, the crystals prepared by the traditional evaporation crystallization system are easily flaky, which leads to the problems of brittle crystals and low loose bulk density. After the crystal is broken, the crystal morphology and particle size change, and the quality of the crystal product is seriously affected. [0003] Crystal particles all have a certain shape. Although the size of each crystal will not be exactly the same, their geometric shapes are similar, and this property of crystals is a manifestation of crystal habit. For the obtained crystal particles, people always hope that they are both uniform and full. The mo...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B01D9/02B01D1/00C07C227/42C07C229/12
CPCB01D9/0018C07C227/42B01D2009/0086C07C229/12
Inventor 龚俊波秦春雷陈冠雄侯宝红吴送姑
Owner TIANJIN UNIV