Process for recovering dipropylene glycol tert-butyl ethers

Details Process for recovering dipropylene glycol tert-butyl ethers Process for recovering dipropylene glycol tert-butyl ethers

C - Chemistry, Metallurgy

07

C

C07C 43/11 (2006.01) C07C 41/42 (2006.01)

Patent

CA 2143407

A process for making and purifying dipropylene glycol tert-butyl ethers (DPTB) is disclosed. DPTB is made by reacting dipropylene glycol with isobutylene in the presence of an acidic catalyst. Extractive distillation of the product mixture using a glycol extracting agent, preferably dipropylene glycol, allows removal of di-tert-butyl ether impurities as an overhead product. The DPTB product is then distilled to separate it from the glycol extracting agent. High-purity DPTB, substantially free of diethers and exceptionally useful as a solvent, is obtained from the process.

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