Patent ID: 6943141

Claim:
In a process for manufacture of a liquid evaporation retardant solution wherein a normally solid-phase higher aliphatic alcohol is dissolved using a normally liquid-phase short-chain alcohol, the improvement comprising: selecting octadecanol to constitute said higher aliphatic alcohol; selecting isopropanol to constitute said short-chain alcohol; selecting water as a solution constituent additional to said octadecanol and isopropanol constituents; providing said isopropanol and said water in a proportion respecting one another that is known to be the proportion of an azeotrope of isopropanol and water; proportioning, for inclusion in said evaporation retardant solution, said azeotrope in a concentration by weight for said solution of 95% and up, and said octadecanol in a concentration by weight of up to 5%; and, by any suitable means, so mixing together said octadecanol isopropanol, and water constituents, according to said provision for proportioning water and isopropanol respecting one another, and according to said proportioning of said azeotrope and said octadecanol, that said octadecanol dissolves and a liquid evaporation retardant product is manufactured.