Methods and compositions for inhibiting corrosion in non-aqueous, non-conductive liquids
The present invention relates to a method for inhibiting in a non-aqueous, non-conductive liquid. The present method also relates to a corrosion inhibitor that can be employed in such a liquid. The method can include measuring or detecting the present corrosion inhibitor with a magnetic flow meter.
1. A method of measuring the flow of polar corrosion inhibitor comprising:
providing a polar corrosion inhibitor; the polar corrosion inhibitor comprising:
about 4 to about 20 wt-% polar compound;
about 10 to about 17 wt-% amine;
about 3 to about 7 wt-% aliphatic anhydride; and
about 55 to about 85 wt-% aromatic solvent;
measuring the corrosion inhibitor with a magnetic flow meter at or before an outlet; and
adding the measured corrosion inhibitor to a non-aqueous, non-conducting liquid from the outlet.
2. The method of claim 1 , comprising adding the polar corrosion inhibitor to ethanol after distillation and before storage.
3. The method of claim 1 , comprising adding the polar corrosion inhibitor to non-aqueous, non-conducting liquid held in a storage tank.
4. The method of claim 1 , comprising adding the polar corrosion inhibitor to an ethanol containing liquid in a distillery.
5. A method of inhibiting corrosion:
providing a polar corrosion inhibitor; the polar corrosion inhibitor comprising:
about 1 to about 50 wt-% polar compound;
about 10 to about 17 wt-% amine;
about 3 to about 7 wt-% aliphatic anhydride; and
about 25 to about 85 wt-% aromatic solvent;
adding the polar corrosion inhibitor to a non-aqueous, non-conducting liquid to produce a corrosion inhibited mixture; and
measuring the flow of the corrosion inhibited mixture with a magnetic flow meter.
6. The method of claim 5 wherein the non-aqueous, non-conducting liquid has a conductivity of less than 3 μS/cm.
7. The method of claim 5 wherein the non-aqueous, non-conducting liquid is ethanol.
8. The method of claim 5 wherein the non-aqueous, non-conducting liquid is 190 proof ethanol.
9. The method of claim 5 , comprising adding the polar corrosion inhibitor to ethanol after distillation and before storage.
10. The method of claim 5 , comprising adding the polar corrosion inhibitor to non-aqueous, non-conducting liquid held in a storage tank.
11. The method of claim 5 , comprising adding the polar corrosion inhibitor to non-aqueous, non-conducting liquid in a transport vessel or pipe simultaneously with the non-aqueous, non-conducting liquid.
12. The method of claim 5 , comprising adding the polar corrosion inhibitor to an ethanol containing liquid in a distillery.
13. The method of claim 1 , wherein the polar corrosion inhibitor comprises:
about 55 to about 60 wt-% aromatic solvent;
about 10 to about 17 wt-% amine;
about 3 to about 7 wt-% aliphatic acid anhydride;
about 10 to about 15 wt-% butyl cellosolve; and
about 10 to about 15 wt-% ethylene glycol.
14. The method of claim 1 , wherein the polar corrosion inhibitor comprises:
about 55 to about 65 wt-% aromatic solvent;
about 10 to about 15 wt-% amine;
about 3 to about 7 wt-% aliphatic acid anhydride;
about 10 to about 15 wt-% ethanol; and
about 10 to about 15 wt-% ethylene glycol.
15. The method of claim 1 , wherein the polar corrosion inhibitor comprises:
56-58 wt-% aromatic solvent;
12 wt-% amine;
5 wt-% aliphatic acid anhydride; and
12.5 wt-% ethylene glycol.
16. The method of claim 5 , wherein the polar corrosion inhibitor comprises:
about 50 to about 60 wt-% aromatic solvent;
about 10 to about 20 wt-% amine;
about 3 to about 7 wt-% aliphatic acid anhydride;
about 10 to about 15 wt-% butyl cellosolve; and
about 10 to about 15 wt-% ethylene glycol.
17. The method of claim 5 , wherein the polar corrosion inhibitor comprises:
about 55 to about 65 wt-% aromatic solvent;
about 10 to about 15 wt-% amine;
about 3 to about 7 wt-% aliphatic acid anhydride;
about 10 to about 15 wt-% ethanol; and
about 10 to about 15 wt-% ethylene glycol.
18. The method of claim 5 , wherein the polar corrosion inhibitor comprises:
56-58 wt-% aromatic solvent;
12 wt-% amine;
5 wt-% aliphatic acid anhydride; and
12.5 wt-% ethylene glycol.