[Soda Ash Knowledge] Question of the Day (26) October 29, 2009
Thread Content
Please hide replies; otherwise, no scoring will be given in principle. Specific hiding method: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 Edited posts are not rated. (The topic for this issue is taken from page 66 of “Question Bank for Technical Workers’ On-the-Job Training – Operators in Soda Ash Production”. The electronic version of this book can be downloaded from the Soda Ash Information Sharing Section: http://bbs.hcbbs.com/thread-13140-1-2.html) Fill-in-the-blank questions: 1. In the crystallizer, AI facilitates the crystallization of ( ) through ( ) and ( ) effects, thereby producing a product that meets the requirements for soda ash production. 2. Generally, there are two ways to express supersaturation: ( ) and ( ). 3. The precipitation of heavy alkali in the carbonation tower is due to the formation of ( ) supersaturation, while the precipitation of ammonium chloride in the crystallizer is due to the formation of ( ) supersaturation. 4. The process of cooling down AI to cause ammonium chloride to crystallize out is called ( ). 5. The process of absorbing ammonia from MI to produce AI involves converting ( ) in MI into ( ), thereby increasing its ( ), and preventing it from co-precipitating during the crystallization of ( ).
1 Cooling, salting out, ammonium chloride, MII 2 Temperature supersaturation, concentration supersaturation 3 Concentration, temperature 4 Cool crystallization 5 Bicarbonates, carbonates, solubility, ammonium chloride
1. Cooling, salting out, ammonium chloride, MⅡ 2. Temperature supersaturation, concentration supersaturation 3. Concentration, temperature 4. Crystallization by cooling 5. Bicarbonates, carbonates, solubility, ammonium chloride
1. Cooling, salting out, ammonium chloride, MII
2. Temperature supersaturation, concentration supersaturation
3. Concentration, temperature
4. Crystallization by cooling
5. Bicarbonates. Carbonates, solubility, ammonium chloride
2. Temperature supersaturation, concentration supersaturation
3. Concentration, temperature
4. Crystallization by cooling
5. Bicarbonates. Carbonates, solubility, ammonium chloride
1. In the crystallizer, AI facilitates the crystallization of (ammonium chloride) through (cold precipitation) and (salting-out) effects; simultaneously, (MⅡ) that meets the requirements for alkali production is obtained. 2. Generally, supersaturation can be expressed in two ways: (concentration supersaturation) and (temperature supersaturation). 3. Sodium bicarbonate precipitates in the carbonation tower because an (concentration) supersaturation is formed; ammonium chloride precipitates in the crystallizer because a (temperature) supersaturation is formed. 4. The process of cooling down AI to cause ammonium chloride to crystallize out is called the (cooling crystallization process). 5. The process of ammonia absorption from MI to produce AI involves converting the (bicarbonates) in MI into (carbonates), thereby increasing their (solubility) and preventing them from precipitating together when (ammonium chloride) crystallizes.
1. Cooling, salting out, ammonium chloride, MII 2. Temperature supersaturation, concentration supersaturation 3. Concentration, temperature 4. Crystallization by cooling 5. Bicarbonates, carbonates, solubility, ammonium chloride
1 Cooling, salting out, ammonium chloride 2 Excessive temperature saturation, excessive concentration saturation 3 Concentration, temperature 4 Crystallization by cooling 5 Bicarbonate, carbonate, solubility, ammonium chloride
1. Cooling, salting out, ammonium chloride, MII 2. Temperature supersaturation, temperature supersaturation 3. Concentration, temperature 4. Crystallization by cooling 5. Bicarbonates, carbonates, solubility, ammonium chloride
1. In the crystallizer, AI facilitates the crystallization of ammonium chloride through cooling and salting-out effects; simultaneously, a product meeting the requirements for alkali production is obtained. 2. Generally, there are two ways to express supersaturation: (temperature supersaturation) and (concentration supersaturation). 3. Sodium bicarbonate precipitates in the carbonation tower due to the formation of (concentration) supersaturation, while ammonium chloride precipitates in the crystallizer due to the formation of (temperature) supersaturation. 4. The process of cooling down AI to cause ammonium chloride to crystallize out is called (cooling crystallization). 5. The process of ammonia absorption from MI to produce AI involves converting the (bicarbonates) in MI into (carbonates), thereby increasing their (solubility) and preventing them from precipitating together when (ammonium chloride) crystallizes.