> use it in chemical processes other than ones which sink the carbon into long lasting solid

There are not many chemical reactions that 'fix' CO2. The compound is pretty low energy. Kind of a analogous to 'feed' bacteria with plastics.

The Swiss start-up Climeworks [1] has a business model built around actually already is in operational mode when it comes to pumping CO2 into the ground in Iceland.

[1] https://www.reuters.com/business/environment/worlds-largest-...