Why potassium carbonate `(K_(2)CO_(3))` cannot be prepared by Solvay-ammonia process ?

Explanation

In Solvay Ammonia process for getting sodium carbonate, `NaHCO_(3)` formed gets precipitated and upon heating is gives sodium carbonate.
`2NH_3+H_2O+CO_2rarr(NH_4)_(2)CO_3`
`(NH_4)_(2)CO_3+H_2O+CO_2rarr2NH_(4)HCO_3`
`NH_4HCO_3+NaClrarrNH_4Cl+NaHCO_3`
Sodium hydrogencarbonate crystal separates. These are heated to give sodium carbonate.
`NaHCO_3rarrNa_2CO_3+CO_2+H_2O`
`KHCO_(3)` is expected to be formed if the same process is used for the preparation of `K_(2)CO_(3)`. But as `KHCO_(3)` is highly soluble in water, it cannot be isolated.