[Soda Ash Knowledge] Daily Question (132) 2010.2.12

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Please hide replies; no scoring will be given if they are not hidden. Posts that have been edited will not be scored. Specific hiding method: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2 %D8 The topic for this issue is taken from the book \"Technical Worker Training Question Bank – Soda Ash Production Operators\"; the electronic version of this book can be downloaded at: http://bbs.hcbbs.com/thread-13140-1-2.html I. Fill in the blanks: 1. In the lime-soda ash process for purifying brine, there is no ammonia present in the brine; therefore, before it enters the ammonia absorption tower, the exhaust gas must first be washed using _____, _______, and ________ before entering the tower. 2. In the lime-ammonium carbonate method for purifying brine, ________, _______, and _______ are used to wash the ammonia gas, after which it is utilized as chemical brine; the brine is then processed through _______, resulting in a solution containing 10–13 tt of ammonia. 3. When the brine begins to absorb ammonia, _______ dissolves very quickly, whereas ________ dissolves very slowly.