Albemarle Corporation

Albermarle Corporation

Joseph H Miller

Joe D Sauer

Bonnie G McKinnie

Dru L DeLaet

Richmond M Starrett

Anthony Frank Skufca

Christopher D Claeboe

Bonnie Gary McKinnie

This invention relates to methods for producing cycloheptatriene from at least 7,7-dichloronorcarane and a liquid component comprising a Cto Csuccinic anhydride, a carboxylic acid, or a Cto Calkyldimethylamine at about 205 deg. C. to about 230 deg. C.

Methods for producing cycloheptatriene

Certain substituted phenolic compounds when used with or without 1,2-epoxides as the sole stabilizer components are very effective in stabilizing n-propyl bromide (NPB). In a standard commercially important 60&#xb0; C. stability test, representative substituted phenolic compounds used pursuant to this invention, can enable NPB to pass the test even though present at levels of about 50 ppm (wt/wt) or less in NPB containing no other stabilizer additive component. In fact, amounts as low as 1 ppm have been found effective with various substituted phenolic compounds. In addition, it has been found that one of the preferred stabilizers of this invention&#x2014;2,6-di-tert-butyl-p-cresol&#x2014;even though higher boiling than NPB, left inconsequential amounts of residue at least throughout the range of 1 to 30 ppm (wt/wt). Also, it has been found that certain other preferred stabilizers of this invention can provide synergistically improved stability in passing the 60&#xb0; C. stability test when used with at least one 1,2-epoxide, notably butylene oxide.

Stabilized propyl bromide compositions

A quaternary ammonium halide is prepared by reacting a substituted or unsubstituted haloalkane with a tert-amine in a mol ratio not higher than 1.1/1 in the absence of a solvent and at a temperature such as to maintain the reaction mixture liquid.

Process for preparing quaternary ammonium compounds

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Baton Rouge, LA, United States of America

Joseph H Miller