PROCESS AND SYSTEM FOR RECYCLING OF CARBON DIOXIDE

摘要

A process which comprises bringing an object of treatment into contact with treater carbon dioxide to make foreign matter contained in the object absorbed in the treater carbon dioxide, bringing the resulting gaseous or supercritical treater carbon dioxide containing the foreign matter into contact with an absorbing solution to make both the foreign matter contained in the gaseous or supercritical treater carbon dioxide and part of the treater carbon dioxide absorbed in the absorbing solution and thereby purify the treater carbon dioxide, recycling the purified treater carbon dioxide to the step of treating an object of treatment, separating the absorbing solution containing the foreign matter and part of the treater carbon dioxide into the foreign matter, liquid treater carbon dioxide, and an absorbing solution, recycling the separated treater carbon dioxide to the step of treating an object of treatment, and recycling the separated absorbing solution to the step of purifying treatment carbon dioxide.