Method for producing soda ash
AssigneeUnited Arab Emirates University
InventorsAhmed Nasereldin Elsayed, Ali Al Marzouqi
Life of this patent
Estimating the term…
Abstract
The present disclosure discloses a method for producing soda ash (sodium carbonate). The method comprises feeding a pressurized saline solution into a high-pressure absorption column; feeding pressurized carbon dioxide into the high-pressure absorption column; dissolving the carbon-dioxide into the saline solution within the high-pressure absorption column; discharging a high-pressure absorption column outlet stream to a filter; filtering sodium hydrogen carbonate from the high-pressure absorption column outlet stream; and feeding the sodium hydrogen carbonate to a calciner to convert the sodium hydrogen carbonate to soda ash. The pressure of the high-pressure absorption column is between 54 to 80 bar.
Claims15
A method for producing soda ash (sodium carbonate), the method comprising:
- feeding a saline feed into a low-pressure column;
- feeding ammonia into the low-pressure column;
- forming an ammonia-saline solution within the low-pressure column;
- discharging a low-pressure column outlet stream to a pump, wherein a pump outlet stream is a pressurized saline solution comprising ammonia;
- feeding the pressurized saline solution into a high-pressure column, the high-pressure column being downstream of the low-pressure column;
- feeding pressurized carbon dioxide into the high-pressure column;
- dissolving the carbon-dioxide into the saline solution within the high-pressure column;
- discharging a high-pressure column outlet stream to a filter;
- filtering sodium hydrogen carbonate from the high-pressure column outlet stream;
- and
- feeding the sodium hydrogen carbonate to a calciner to convert the sodium hydrogen carbonate to soda ash;
- wherein the pressure of the high-pressure column is between 54 to 80 bar;
- and
- wherein the pressure of the low-pressure column is less than the pressure of the high-pressure column.
A soda ash production system, the soda ash production system comprising:
- a high-pressure absorption column configured to have a pressure of between 54 to 80 bar;
- a low-pressure column upstream of, and fluidly connected to, the high-pressure column, the low-pressure column configured to combine ammonia and a saline feed to form an ammonia-saline solution;
- a pump configured to pressurize the ammonia-saline solution prior to being fed into the high-pressure column;
- a filter fluidly connected to an outlet of the high-pressure column;
- and
- a calciner connected to the filter;
- wherein the high-pressure column is configured to receive the pressurized ammonia-saline solution and pressurized carbon dioxide,
- wherein the filter is configured to filter sodium hydrogen carbonate from the outlet of the high-pressure column;
- and
- wherein the calciner is configured to convert the sodium hydrogen carbonate to soda ash.
Dependencies are inferred from the claim text.