The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 1996
Filed:
Nov. 28, 1994
Kyle L Preston, Port Arthur, TX (US);
Lawrence E Tillotson, Port Neches, TX (US);
Rei-Yu J Hwan, Sugarland, TX (US);
Texaco Development Corp., White Plains, NY (US);
Abstract
Methyl tertiary butyl ether is sequentially prepared from tertiary butyl alcohol and methanol by: passing tertiary butyl alcohol and methanol through a primary reaction zone to form a primary etherification reaction product comprising unreacted methanol, unreacted tertiary butyl alcohol, water, dimethyl ether, isobutylene and methyl tertiary butyl ether; separating the primary etherification reaction product into a methanol recycle fraction, a tertiary butyl alcohol recycle fraction, an isobutylene fraction and a methyl tertiary butyl ether product fraction; recycling the methanol recycle fraction and the tertiary butyl alcohol recycle fraction to the methyl tertiary butyl ether etherification reaction zone; passing at least a portion of said isobutylene fraction together with added methanol through a secondary reaction zone to form a secondary etherification reaction product comprising water, methanol, isobutylene, DME, methyl tertiary butyl ether and tertiary butyl alcohol; and recovering the methyl tertiary butyl ether from said secondary etherification reaction product.