What purity of carbon dioxide gas is needed to make soda ash?

http://bbs.hcbbs.com/thread-560139-1-1.html The above are books on soda ash production. In addition, there are similar books on the forum. You can search for them. Understand the basic principles of soda ash production.

A method for improving the purity of soda ash products, which is characterized in that during the production process of the combined alkali method, the AII clarified by the clarification barrel (7) is further purified using purification technology, and then the purified AII is sent to the carbonization tower through the AII pump (2) for the subsequent production of the combined alkali method. The purification technology includes two processes.: One is the purification process, and the other is the regeneration process. The purification process is that AII clarified by the AII clarification barrel (7) enters the upper distributor (S) in the purifier (1) from the purification pipeline through the purification inlet valve (2'), and then passes through After being purified by the purification medium (G) in the purifier, AII passes through the lower distributor (H) in the purifier, flows out from the purification outlet valve (5'), and is sent to the carbonization tower for production by the AII pump (2). The excess AII flows into the AII barrel (3) for storage ； The regeneration process flow is to use the regeneration pump (4) to transport the AⅡ stored in the AⅡ barrel (3) from the regeneration pipeline through the regeneration inlet valve (4') into the lower distributor (H) of the purifier, and then remove the siltation in the medium layer (G) of the purifier (1) The impurities in the purifier are brought out from the upper part of the purifier with AII and flow into the dirty water bucket (6) through the regeneration outlet valve (3'), so that the purifier (1) restores the purification capacity. The dirty water pump (5) returns the AII in the dirty water bucket (6) to the clarification bucket (7) for clarification.

The higher the purity of carbon dioxide required for soda ash, the better. If it is lower, the consumption will be higher.