Paulino V Forte

US Patent:

6531103, Mar 11, 2003

Filed:

Mar 9, 2000

Appl. No.:

09/521654

Inventors:

Leo Ernest Hakka - Dollard des Ormeaux, CA
Paulino Forte - Yonkers NY

Assignee:

Union Carbide Chemicals and Plastics Technology Corporation - Danbury CT

International Classification:

C07C 700

US Classification:

4232422, 4232426, 423226, 481273, 208208 R, 208237, 208238, 208244, 208289, 208290, 208295, 585850, 585856, 585860, 585864, 585865, 585867

Abstract:

The present invention provides a process for removing sulfur compounds including sulfur in the (-2) oxidation state such as mercaptans, dialkyl sulfides, carbonyl sulfide, hydrogen sulfide, thiophenes and benzothiophenes, from liquid or gas feed streams, particularly hydrocarbon feed streams such as, for example, natural gas and refinery process streams. According to the process, such a feed stream including these sulfur impurities is contacted with an absorbent which includes a metal ion-containing organic composition such as, for example, iron, copper, lead, nickel, tin, zinc or mercury cation-containing phthalocyanine or porphyrin to thereby form sulfur-metal cation coordination complexes in which the oxidation state of the sulfur and the metal cation remains essentially unchanged. The complexes are separated from the feed stream, and the absorbent is regenerated by disassociating the sulfur compound from the complexes.

US Patent:

51396513, Aug 18, 1992

Filed:

Jun 10, 1991

Appl. No.:

7/712856

Inventors:

Paulino Forte - Yonkers NY

Assignee:

UOP - Des Plaines IL

International Classification:

C10G 2116
C10G 2128

US Classification:

208334

Abstract:

Processes are provided for the recovery of aromatic hydrocarbons from feeds comprising mixtures of aromatic and non-aromatic hydrocarbons using a mixed aromatic extraction solvent at extraction temperature of less than 250. degree. F. The mixed extraction solvent is comprised of a solvent component containing low molecular weight polyalkylene glycols and a cosolvent component containing glycol ethers. Extractive distillation and steam distillation operations are employed to separate the hydrocarbon components from the rich solvent extract. Low temperature extraction followed by subsequent heating of the rich solvent stream results in improved solvent selectivity, reduced solvent to feed ratios, improved thermal stability and energy savings.

US Patent:

50736698, Dec 17, 1991

Filed:

Mar 9, 1989

Appl. No.:

7/321033

Inventors:

Paulino Forte - Yonkers NY

Assignee:

UOP - Des Plaines IL

International Classification:

C07C 700
C10G 1704

US Classification:

585808

Abstract:

Methods are provided for the recovery of aromatic hydrocarbons from the extract phase of aromatic-selective solvent extraction processes which involve withdrawing a vapor side-cut fraction containing aromatic hydrocarbons and solvents from a stripping zone and passing the side-cut fraction to a rectification zone which can be refluxed with aromatic hydrocarbons or aqueous condensate.

US Patent:

52025209, Apr 13, 1993

Filed:

Apr 20, 1992

Appl. No.:

7/871349

Inventors:

Paulino Forte - Yonkers NY

Assignee:

UOP - Des Plaines IL

International Classification:

C07C 700
C07C 710
C10G 1704
C10G 2128

US Classification:

585808

Abstract:

A method is provided for the recovery of aromatic hydrocarbons from the extract phase of aromatic-selective solvent extraction process which involves withdrawing a vapor side-cut fraction containing aromatic hydrocarbons and solvent from a stripping zone and passing the side-cut fraction to a rectification zone which can be refluxed with an aqueous condensate. The benefits of the invention are that the introduction of the rectification zone bottoms to the bottom of the stripping section provides an aromatic product comprising less than 100 wt. ppm. solvent, provides improved stripping over prior schemes, and reduces the flowrate of stripping medium throughout the stripping zone which results in energy saving.

US Patent:

46938109, Sep 15, 1987

Filed:

Jun 6, 1985

Appl. No.:

6/741830

Inventors:

Paulino Forte - Yonkers NY
Jose A. Vidueira - White Plains NY

Assignee:

Union Carbide Corporation - Danbury CT

International Classification:

C10G 700
B01D 338

US Classification:

208321

Abstract:

In a solvent extraction/steam distillation process for the recovery of aromatic hydrocarbons wherein stripping water is obtained from the distillation column, the improvement comprising (a) dividing the stripping water into two streams; (b) passing one stream to a motive steam generator wherein the stripping water is vaporized and passed to a steam ejector; (c) passing the other stream to a heat exchanger wherein the stripping water is vaporized by lean solvent from the distillation column, the lean solvent is cooled, and the stripping water vapor passes to the steam ejector; (d) passing the stripping water vapor from steps (b) and (c) to the distillation column; and (e) passing the lean solvent from step (c) to the extractor.

US Patent:

42475210, Jan 27, 1981

Filed:

Aug 15, 1979

Appl. No.:

6/066853

Inventors:

Paulino Forte - Yonkers NY
George S. Somekh - New Rochelle NY

Assignee:

Union Carbide Corporation - New York NY

International Classification:

B01D 1200

US Classification:

422256

Abstract:

A liquid-liquid contacting tray comprising a perforated deck providing a major portion of the tray surface area and continuous phase liquid transfer means comprising a settling section extending outwardly from the tray deck on one side of the tray and joined in closed flow communication with a smaller cross-sectioned pressure drop section extending outwardly from the tray deck on the other side of the tray to provide a sudden contraction in cross-sectional area from the settling section to said pressure drop section substantially in the plane of the perforated deck for reduction of pressure in the liquid flowed therethrough.

US Patent:

51768216, Jan 5, 1993

Filed:

Feb 20, 1991

Appl. No.:

7/657916

Inventors:

Paulino Forte - Yonkers NY

Assignee:

UOP - Des Plaines IL

International Classification:

B01D 340

US Classification:

208313

Abstract:

In a combined solvent extraction/steam distillation process for the separation of aromatic hydrocarbons from a mixture of aromatic and non-aromatic hydrocarbons, there are three major thermal and material cycles: the solvent cycle, the hydrocarbon cycle, and the water cycle. The process is improved by redistributing the energy use between the three cycles to minimize the internal recycle within the process and to reduce the overall energy requirements. One means of the redistribution includes cooling of a lean solvent stream with liquid in a recovery or stripping column. Cooling of the lean solvent reduces flashing within an extract column and the resulting reflux of hydrocarbons to the extract column.

US Patent:

44015607, Aug 30, 1983

Filed:

Jul 1, 1982

Appl. No.:

6/394301

Inventors:

Jose A. Vidueira - White Plains NY
Paulino Forte - Yonkers NY
Kenneth F. Butwell - Newburgh NY

Assignee:

Union Carbide Corporation - Danbury CT

International Classification:

C10G 2116

US Classification:

208324

Abstract:

An improvement to a continuous solvent extraction-steam distillation process for the recovery of aromatic hydrocarbons in the range of C. sub. 6 -C. sub. 16 from a feed stream containing such aromatics and aliphatic hydrocarbons in the range of C. sub. 5 -C. sub. 16 which resides in utilizing two heat exchangers wherein the heat of condensation of the overhead stripper vapor and vapor sidedraw products is recovered and utilized to vaporize the stripping water, thereby producing stripping steam which in turn is compressed up to the pressure present at the bottom of the stripper and resulting in the reduction of the heat load of the process.