Carbon alkaline process for manufacturing borax with energy saving, consumption reduction and high efficiency

The invention relates to a carbon alkaline process for manufacturing borax with energy saving, consumption reduction and high efficiency, belonging to the field of chemical engineering science. The process for manufacturing borax comprises: 1, CO2 with high temperature (145-165 DEG C), high pressure (0.8-1.2MPa) and high volume concentration (98-99%) is used for deep carbonate decomposition; 2, a hot carbonate catalyzing method is used for enriching CO2 in conventional carbonate decomposition tail gas, and the regenerated heat is provided by water vapor and evaporated end effect vapor in the tail gas; 3, CO2 in decompressed gas and purge gas in the discharging process is recycled, and the water vapor is used for heating slag washing water; and 4, the heat (65-75 DEG C) before evaporation concentration liquid enters a crystallization cooler is used for heating borax mother liquid and washing water. The process can shorten the carbonate decomposition time to 7-10 hours, enable the carbonate decomposition rate t