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

1994-02-28

1996-09-03

Manoharan, Virginia

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

203 78, 203 80, 203DIG16, 568697, 568699, B01D 340

Patent

active

055520243

ABSTRACT:
A process for making and purifying dipropylene glycol tert-butyl ethers (DPTB). 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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CA 119(12): 119969p.
CA 119(6): 51744d.

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