New approach to development of phenolic thermopolymerization inhibitors for processing of pyrolysis products (by example of pyrocatechol)

Utilizing the phenol byproducts of coke production. 5. Boosting the inhibiting activity of phenols by heat treatment in the phenol-turpentine-solvent system

“…We find that the system with phenol, turpen tine, and solvent (ethyl alcohol) acquires strong inhib iting properties only after heat treatment for 2 h at 130°C [11]. The most effective solvents are alcohols.…”

“…On that basis, we have developed a new method of processing coke plant phenols so as to obtain polymerization inhibitors. In this approach, the phenols are activated by relatively mild heat treatment in the phenol-turpentine-solvent system [7]. By this means, the inhibiting activity of phenols is increased to match that of the best sterically hindered phenols, such as ionol and tert butylpyrocatechol.…”

“…Most of the diatomic phenols consist of pyrocatechol and its derivatives: 3 methylpyrocatechol and 4 methylpyro To obtain an effective inhibiting mixture on the basis of coke plant phenols, they are heat treated in the presence of sulfate turpentine for 2 h at 130°C. The treatment conditions are selected in experiments with an individual phenol compound: pyrocatechol [11].…”