Carmen M Yon

US Patent:

54018870, Mar 28, 1995

Filed:

Feb 25, 1994

Appl. No.:

8/201590

Inventors:

Henry Rastelli - New Fairfield CT
Carmen M. Yon - Carmel NY
Stanley J. Frey - Palatine IL

Assignee:

UOP - Des Plaines IL

International Classification:

C07C 4106

US Classification:

568697

Abstract:

The present invention is a cyclic process for the preparation of ethyl tert. -alkyl ethers by the reaction of an alcohol, ethanol, with an iso-olefin such as isobutylene or isoamylene wherein an effluent from the reaction zone is separated in a distillation column to provide an overhead effluent stream and a bottoms effluent stream comprising ethyl tert. -alkyl ether and unreacted ethanol. The unreacted ethanol is recovered in an adsorption zone comprising a selective adsorbent selected from the group consisting of zeolite 13X, sodium zeolite Y, alumina, silicalite and mixtures thereof. The invention is useful in recovering unreacted ethanol from the bottoms effluent stream and returning the unreacted ethanol to the reaction zone. The invention reduces the cost of this separation which is complicated by the formation of an azeotrope between the unreacted alcohol and the ether.

US Patent:

51772981, Jan 5, 1993

Filed:

Jun 18, 1991

Appl. No.:

7/717296

Inventors:

Carmen M. Yon - Carmel NY
Joe Quock - Hopewell Juction NY
Wim P. Reel - Emblem, BE
Henry Rastelli - New Fairfield CT

Assignee:

UOP - Des Plaines IL

International Classification:

C07C 712
B01J 2034

US Classification:

585824

Abstract:

A process for the regeneration of oxygenate containing adsorbents uses regenerant streams such as LPG and isomerate products for the desorption of oxygenate compounds. The process discloses arrangements for the integration of regenerant treatment into the adsorption scheme and for the enhancement of the isomerate product. The integrated flowscheme can be used to remove sulfur and water from contaminated regenerants or to deliver the oxygenates into the gasoline pool.

US Patent:

62873652, Sep 11, 2001

Filed:

Mar 6, 2000

Appl. No.:

9/519832

Inventors:

John Markovs - Cross Junction VA
Gordon T. Cartwright - Streamwood IL
Carmen M. Yon - Wheaton IL
Henry Rastelli - Gurnee IL

Assignee:

UOP LLC - Des Plaines IL

International Classification:

B01D 5304

US Classification:

95 96

Abstract:

A process is provided for the removal of trace amounts of aromatic hydrocarbons from an acid waste gas feed stream comprising sulfur compounds and the aromatic hydrocarbons. An adsorption process employing an adsorbent such as a high silica zeolite adsorbent having a framework silica-to-alumina ratio greater than about 15 and having a pore size greater than about 6. 2 angstroms is used to remove from the feed gas mixture aromatic hydrocarbon contaminants and permit the recovery of a high purity sulfur product from the treated effluent stream. The use of the present invention removes aromatic hydrocarbon contaminants which are responsible for the degeneration of the performance of the downstream sulfur recovery zone.

US Patent:

54751500, Dec 12, 1995

Filed:

Nov 14, 1994

Appl. No.:

8/337805

Inventors:

Henry Rastelli - New Fairfield CT
Carmen M. Yon - Carmel NY
Stanley J. Frey - Palatine IL

Assignee:

UOP - Des Plaines IL

International Classification:

C07C 4134

US Classification:

568699

Abstract:

The present invention relates to a process for the separation of ethanol from a mixture thereof with ethyl tert. -alkyl ether employing a selective adsorbent comprising a mixture of sodium zeolite Y in combination with alumina wherein the percentage of the sodium zeolite Y ranges between 10 and 40 wt-%. The invention reduces the cost of this separation which is complicated by an azeotrope formation between the alcohol and the ether.

US Patent:

61205818, Sep 19, 2000

Filed:

Jan 13, 1999

Appl. No.:

9/231359

Inventors:

John Markovs - Arlington Heights IL
Gordon Thomas Cartwright - Streamwood IL
Carmen M. Yon - Wheaton IL
Henry Rastelli - Gurnee IL

Assignee:

UOP LLC - Des Plaines IL

International Classification:

B01D 5347

US Classification:

95 99

Abstract:

A process is provided for the removal of trace amount of aromatic hydrocarbons from a waste feed gas stream comprising sulfur compounds and the aromatic hydrocarbons. An adsorption process employing an adsorbent such as a high silica zeolite adsorbent having a framework silica to alumina ratio greater than about 15 and having a pore size greater than about 6. 2 Angstroms is used to remove from the feed gas mixture aromatic hydrocarbon contaminants and permit the recovery of a high purity sulfur product from the treated effluent stream. The adsorption zone comprises at least 2 adsorption beds wherein one of the first adsorption beds is operating in an adsorption mode and the other is being regenerated at a desorption pressure higher than the adsorption pressure. The regeneration is performed in a closed system or partially closed system, and prior to returning a regenerated adsorption zone to adsorption conditions the waste feed gas stream is used to cool and purge the regenerated zone. Purge effluent from the regeneration zone is passed to a bed undergoing adsorption in a lead/trim configuration to prevent a slug of aromatic hydrocarbons from entering the adsorption effluent.

US Patent:

55570305, Sep 17, 1996

Filed:

Mar 23, 1995

Appl. No.:

8/409114

Inventors:

John Markovs - Yorktown Heights NY
Carmen M. Yon - Carmel NY

Assignee:

UOP - Des Plaines IL

International Classification:

C07C 0712

US Classification:

585826

Abstract:

A process is provided for the removal of heavy hydrocarbons from a feed gas mixture. An adsorption process employing a high silica zeolite adsorbent having a silica to alumina ratio greater than about 20 and having a pore size greater than about 4. 5 Angstroms is used to remove from the feed gas mixture heavy hydrocarbon contaminants and permit the further treatment of the feed gas for the bulk removal of carbon dioxide. The adsorption zone comprises at least 2 adsorption beds wherein one of the first adsorption beds is operating in an adsorption mode and the other is being regenerated. The effluent from the adsorption zone, depleted in heavy hydrocarbons is passed to a membrane treating zone to provide a non-permeate stream depleted in carbon dioxide. At least a portion of the non-permeate stream is heated and the heated non-permeate stream is used to regenerate the adsorption zone. The use of the present invention removes heavy hydrocarbon contaminants which are responsible for the degeneration of the performance of the membrane treating zone.

US Patent:

55697879, Oct 29, 1996

Filed:

Nov 30, 1994

Appl. No.:

8/346951

Inventors:

Henry Rastelli - New Fairfield CT
Carmen M. Yon - Carmel NY
Stanley J. Frey - Palatine IL

Assignee:

UOP - Des Plaines IL

International Classification:

C07L 4100

US Classification:

568697

Abstract:

The present invention is a cyclic process for the preparation of ethyl tert. -alkyl ethers by the reaction of an alcohol, ethanol, with an iso-olefin such as isobutylene or isoamylene wherein an effluent from the reaction zone is separated in a distillation column to provide an overhead effluent stream and a bottoms effluent stream comprising ethyl tert. -alkyl ether and unreacted ethanol. The unreacted ethanol is recovered in an adsorption zone comprising a selective adsorbent selected from the group consisting of zeolite 13X, sodium zeolite Y, alumina, silicalite and mixtures thereof. The invention is useful in recovering unreacted ethanol from the bottoms effluent stream and returning the unreacted ethanol to the reaction zone. The invention reduces the cost of this separation which is complicated by the formation of an azeotrope between the unreacted alcohol and the ether.

US Patent:

44876149, Dec 11, 1984

Filed:

Nov 16, 1983

Appl. No.:

6/552337

Inventors:

Carmen M. Yon - Carmel NY

Assignee:

Union Carbide Corporation - Danbury CT

International Classification:

B01D 5304

US Classification:

55 33

Abstract:

In a fixed-bed vapor phase adsorption cycle for bulk separations wherein the heat front generated by the exothermic heat of adsorption is maintained in the bed either in or behind the mass transfer zone, and is subsequently utilized in the purge desorption/regeneration of the bed, improved efficiency and enhanced versatility with respect to the degree of product purity is obtained by treating the regeneration purge gas with a portion of the purified product.