The method of ethyl ester recrystallization
If you want to recrystallize ethyl ester, you should follow all the rules. Prepare the refined material first, so that it is pure and free of impurities. Choose a suitable device to support the change of the material.

The product to be crystallized is suitable for a device containing ethyl ester. It is slightly hot to make the product gradually dissolve. This process needs to be slowed down, not rushed, to prevent overheating from damaging the quality of the material. When it is completely dissolved, the solution should be clear and free of dregs.

Then, move the device to a suitable environment to make it gradually cool. The cooling speed should be adjusted. If it is too fast, it will be fine and miscellaneous. If it is too slow, it will take a long time. When the crystals are gradually emerging, a clear body can be seen, like a star, on the wall or bottom of the device.

At this time, carefully filter out the crystals with a fine filter. Then use cold ethyl ester to gently polyester to remove impurities attached to the crystal surface. After polyester, place the crystals in a ventilated and dry place, and wait for them to dry naturally, or apply a little heat to help dry, but the heat should not be high, so as to avoid the complex transformation of crystallization.

In this way, a pure recrystallization product can be obtained, and its purity is stable for subsequent use.