| 摘要 |
<p>The invention relates to a process for concentrating phosphoric acid. This process is characterised in that it provides the heat necessary to the heat exchangers 5, 6 for the concentration of phosphoric acid through hot water circulating in a closed circuit 22, 23, 24, 25 which is heated by passing through heat exchangers 20, 21 fed by the sulphuric acid from SO3 absorption circuits 18, 19 in a sulphuric acid manufacturing plant.</p> |
