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:
Mar. 04, 2014
Filed:
Apr. 11, 2008
Danil Tirtowidjojo, Lake Jackson, TX (US);
Andrei S. Merenov, Lake Jackson, TX (US);
Christian D. Kneupper, Brazoria, TX (US);
Bruce D. Hook, Lake Jackson, TX (US);
Anil I. Mehta, Lake Jackson, TX (US);
Danil Tirtowidjojo, Lake Jackson, TX (US);
Andrei S. Merenov, Lake Jackson, TX (US);
Christian D. Kneupper, Brazoria, TX (US);
Bruce D. Hook, Lake Jackson, TX (US);
Anil I. Mehta, Lake Jackson, TX (US);
Dow Global Technologies Inc., Midland, MI (US);
Abstract
A process and apparatus for recovering dichlorohydrins from a mixture comprising dichlorohydrins, one or more compounds selected from esters of dichlorohydrins, monochlorohydrins and/or esters thereof, and multihydroxylated-aliphatic hydrocarbon compounds and/or esters thereof, and optionally one or more substances comprising water, chlorinating agents, catalysts and/or esters of catalysts is disclosed. The mixture is distilled or fractionated to separate a lower boiling fraction comprising dichlorohydrin(s) from the mixture to form a higher boiling fraction comprising the residue of the distillation or fractionation. The higher boiling fraction is stripped to recover remaining dichlorohydrins. Advantages include more efficient recovery of dichlorohydrins for a given distillation column, less waste due to avoiding the conditions conducive to the formation of heavy byproducts, and reduced capital investment in recovery equipment.