SARA WILLERT BOEHMER
Engineers in Newark, DE
License number
Pennsylvania PE033649E
Category
Engineers
Type
Professional Engineer
Address
Address
2
Newark, DE 19711
Pennsylvania
Pennsylvania
Personal information
See more information about SARA WILLERT BOEHMER at radaris.comName
Address
Phone
6 Gibbs Ln, Newark, DE 19711
Hockessin, DE
6 Gibbs Ln, Newark, DE 19711
6 Gibbs Ln, Newark, DE 19711
Professional information
Separating 1,1,1,3,3-Pentafluoropropane From Hydrogen Fluoride
US Patent:
6303838, Oct 16, 2001
Filed:
Mar 31, 2000
Appl. No.:
9/509859
Inventors:
Sara W. Boehmer - Newark DE
Barry Asher Mahler - Glen Mills PA
Ralph Newton Miller - Newark DE
Barry Asher Mahler - Glen Mills PA
Ralph Newton Miller - Newark DE
Assignee:
E.I. du Pont de Nemours and Company - Wilmington DE
International Classification:
C07C 1738
US Classification:
570178
Abstract:
Disclosed are processes for separating 1,1,1,3,3-pentafluoropropane (HFC-245fa) from hydrogen fluoride (HF) by distillation, wherein hydrocarbons, chloroflurocarbons, hydrochlorofluorocarbons and fluorocarbons are used as entraining agents. The processes comprise: contacting a first mixture comprising HFC-245fa and HF with an entraining agent selected from the group consisting of hydrocarbons, chlorofluorocarbons, hydrochlorofluorocarbons and fluorocarbons to form a second mixture, distilling the second mixture and thereby separating the HFC-245fa from HF and entraining agent, and recovering HFC-245fa substantially-free of HF.
Purification Of Difluoromethane By Extractive Distillation
US Patent:
7371309, May 13, 2008
Filed:
Aug 12, 1998
Appl. No.:
09/485559
Inventors:
Sara W. Boehmer - Newark DE, US
Barry Asher Mahler - Glen Mills PA, US
Ralph Newton Miller - Newark DE, US
Barry Asher Mahler - Glen Mills PA, US
Ralph Newton Miller - Newark DE, US
Assignee:
E. I. du Pont de Nemours and Company - Wilmington DE
International Classification:
B01D 3/40, C07C 17/386, C07C 19/08
US Classification:
203 57, 203 62, 203 63, 203 67, 203 68, 203 69, 203 70, 570178
Abstract:
The present invention provides extractive distillation processes for removing difluoromethane (HFC-32) from a mixture comprising HFC-32 and at least one of chlorodifluoromethane (CFC-12), 1,1,1-trifluoroethane (HFC-143a), chloropentafluoroethane (CFC-115), and pentafluoroethane (HFC-125) using hydrocarbon, chlorocarbon, and oxygen-containing extractive agents.