Amidoamine synthesis, methods to track the reaction process

A method of formulating a wellbore fluid, the method comprising:

• quantifying, by nonaqueous titration, the concentration of residual free amine in a product mixture prepared from a reaction of a multireactive species and a fatty reactant, wherein the reaction of a multireactive species and a fatty reactant comprises an amide- or imine-forming reaction;
• verifying that the concentration for the residual free amine in the product mixture is within an acceptable threshold;
• and
• combining the product mixture with one or more wellbore fluid components to generate the wellbore fluid;
• further comprising determining the concentration of free carboxylic acid in the product mixture, and adjusting the concentration of the free carboxylic acid in the wellbore to a concentration within the range of 0 ppb to 10 ppb.

A method of monitoring the conversion of a multireactive species, the method comprising:

• reacting the multireactive species and a fatty reactant to generate a product mixture, wherein reacting the multireactive species and a fatty reactant comprises an amide- or imine-forming reaction;
• quantifying the concentration of residual free amine and/or free carboxylic acid in the product mixture;
• verifying that the concentration for the free amine and/or free acid in the product mixture is within an acceptable threshold;
• and
• collecting the product mixture.