Dianfeng Chemical
SUPPLEMENTS
Preparation of Tris Thiourea Copper 1 Sulphate
Preparation of copper trithiourea (ⅰ) sulfate
Preparation of raw materials
To make copper trithiourea (ⅰ) sulfate, copper sulfate ($CuSO_ {4}\ cdot5H_ {2} O $), thiourea ($CS (NH_ {2}) _ {2} $), sodium sulfite ($Na_ {2} SO_ {3} $) and other raw materials should be prepared. Copper sulfate should be selected with high purity and good crystallization; thiourea should be white and pure; sodium sulfite should also ensure quality without obvious impurities.
Preparation steps
1. First take an appropriate amount of copper sulfate crystals, put them in a clean beaker, add an appropriate amount of distilled water, stir slowly with a glass rod to promote their dissolution, and obtain a blue copper sulfate solution. Pay attention to the change of water temperature during the dissolution process, and do not cause copper sulfate to hydrolyze if the temperature is too high.
2. Take another amount of thiourea and dissolve it with distilled water. This solution should be used now to prevent the deterioration of thiourea.
3. Gradually add sodium sulfite solids to the copper sulfate solution and stir while adding. Sodium sulfite acts as a reducing agent to reduce Cu $^ {2 +} $to $Cu ^ {+} $. This reaction is violent, and there is gas escape. It is necessary to control the feeding speed to prevent the solution from overflowing.
4. After $Cu ^ {2 +} $is partially reduced, slowly pour the thiourea solution into the above mixed solution and continue to stir. At this time, the color of the solution gradually changes, and copper trithiourea (ⅰ) sulfate is formed. During the reaction process, pay attention to observe the color of the solution and the change of precipitation.
5. After the reaction, let the mixture stand for a period of time to allow the precipitation to fully settle. After that, use a Brinell funnel and a suction filter device for suction filtration to separate the precipitation from the mother liquor. When suction filtration, make sure that the filter paper fits the funnel, and the device has good air tightness.
6. The resulting precipitation is washed several times with an appropriate amount of ethanol to remove surface adsorption impurities. Ethanol is volatile and can take away moisture, which is conducive to product drying.
7. After washing, the precipitate is placed in an oven, and the temperature is controlled and dried to obtain a pure copper trithiourea (ⅰ) sulfate solid. The drying temperature should not be too high to avoid the decomposition of the product.
The preparation process of copper trithiourea (ⅰ) sulfate requires rigorous operation in each step. Strict temperature control, quantity control and reaction time can be used to obtain high-purity products for subsequent research or application.
Preparation of raw materials
To make copper trithiourea (ⅰ) sulfate, copper sulfate ($CuSO_ {4}\ cdot5H_ {2} O $), thiourea ($CS (NH_ {2}) _ {2} $), sodium sulfite ($Na_ {2} SO_ {3} $) and other raw materials should be prepared. Copper sulfate should be selected with high purity and good crystallization; thiourea should be white and pure; sodium sulfite should also ensure quality without obvious impurities.
Preparation steps
1. First take an appropriate amount of copper sulfate crystals, put them in a clean beaker, add an appropriate amount of distilled water, stir slowly with a glass rod to promote their dissolution, and obtain a blue copper sulfate solution. Pay attention to the change of water temperature during the dissolution process, and do not cause copper sulfate to hydrolyze if the temperature is too high.
2. Take another amount of thiourea and dissolve it with distilled water. This solution should be used now to prevent the deterioration of thiourea.
3. Gradually add sodium sulfite solids to the copper sulfate solution and stir while adding. Sodium sulfite acts as a reducing agent to reduce Cu $^ {2 +} $to $Cu ^ {+} $. This reaction is violent, and there is gas escape. It is necessary to control the feeding speed to prevent the solution from overflowing.
4. After $Cu ^ {2 +} $is partially reduced, slowly pour the thiourea solution into the above mixed solution and continue to stir. At this time, the color of the solution gradually changes, and copper trithiourea (ⅰ) sulfate is formed. During the reaction process, pay attention to observe the color of the solution and the change of precipitation.
5. After the reaction, let the mixture stand for a period of time to allow the precipitation to fully settle. After that, use a Brinell funnel and a suction filter device for suction filtration to separate the precipitation from the mother liquor. When suction filtration, make sure that the filter paper fits the funnel, and the device has good air tightness.
6. The resulting precipitation is washed several times with an appropriate amount of ethanol to remove surface adsorption impurities. Ethanol is volatile and can take away moisture, which is conducive to product drying.
7. After washing, the precipitate is placed in an oven, and the temperature is controlled and dried to obtain a pure copper trithiourea (ⅰ) sulfate solid. The drying temperature should not be too high to avoid the decomposition of the product.
The preparation process of copper trithiourea (ⅰ) sulfate requires rigorous operation in each step. Strict temperature control, quantity control and reaction time can be used to obtain high-purity products for subsequent research or application.
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