Frederick W Gilbert

US Patent:

41674375, Sep 11, 1979

Filed:

Mar 9, 1977

Appl. No.:

5/776094

Inventors:

Frederick W. Gilbert - Shreveport LA

Assignee:

Cook Electric Company - Morton Grove IL

International Classification:

B01D 100

US Classification:

159 28R

Abstract:

A boiling water evaporator having a horizontally disposed shrouded heating tube bundle partially immersed in a liquid container. Improved heat transfer rate and high vapor release rate are obtained.

US Patent:

41315383, Dec 26, 1978

Filed:

Oct 20, 1977

Appl. No.:

5/843831

Inventors:

Charles D. Rose - Shreveport LA
Frederick W. Gilbert - Shreveport LA

Assignee:

Riley-Beaird, Inc. - Shreveport LA

International Classification:

C10G 700

US Classification:

208352

Abstract:

A method and apparatus for separating a predetermined fraction from a crude oil includes preheating the crude oil to vaporize a portion, and feeding the two-phase crude to a first stage flash evaporator. In the first stage evaporator, a vapor portion is separated from residual liquid and the residual liquid is used by means of heat exchange to preheat the crude oil. The vapor fraction from the first stage evaporator has an approximate 90% ASTM distillation temperature about 50-60. degree. F higher than the first stage evaporator temperature. The vapor fraction is condensed to form a condensate, and the condensate is conveyed to a stripping column for mass transfer with ascending vapors from a second stage boiling type evaporator. The second stage evaporator is operated at a vaporization temperature approximately equal to the 5% ASTM vaporization temperature of the predetermined petroleum fraction collected as liquid from the second stage evaporator. Vapors removed from the stripping column include a crude oil fraction having an ASTM flash temperature lower than the temperature of operation of the second stage, and crude oil volatile impurities.