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Dorai S Ramprasad

from Columbia, MD
Age ~70
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Also known as:
Dorai Ramprashd, Dorai Rampradad, Ramprasad Dorai, Dorai D
Phone and address:
10635 Gramercy Pl, Columbia, MD 21044
(443) 542-9562
Related to:
Benjamin G Ramprasad
Connected to:
Sudhir Ramprasad, 47Andy Rampulla, 44George M Rampulla, 74Jacqueline M Rampulla, 71Leonard M Rampulla, 70Ebrahim S Rampurawala, 38Sarla S Rampuria, 72Thomas D Ramputi, 61Arthur A Rampy, 95Erwin Rampy, 70

Dorai Ramprasad Phones & Addresses

  • 10635 Gramercy Pl, Columbia, MD 21044 (443) 542-9562
  • 10635 Gramercy Pl #139, Columbia, MD 21044 (443) 542-9562
  • 10635 Gramercy Pl #137, Columbia, MD 21044
  • Watertown, MA
  • 316 41St St, Allentown, PA 18104
  • 332 Tamarack Dr, Allentown, PA 18104 (610) 398-8695
  • 2836 Pineleaf Dr, Sugar Land, TX 77479
  • German Valley, IL
  • 10635 Gramercy Pl UNIT 139, Columbia, MD 21044 (610) 390-1717

Work

Company: W.r. grace Aug 2011 Position: Global technology manager for chemical catalysts and adsorbents

Education

School / High School: The Ohio State University 1984 to 1986 Specialities: Chemistry

Skills

Catalysis • Chemistry • Nanotechnology • Polymers • Commercialization • R&D • Process Simulation • Materials Science • Materials • Chemical Engineering • Heterogeneous Catalysis • Product Development • Nanomaterials • Polymer Chemistry • Characterization • Additives • Analytical Chemistry • Adhesives • Polymer Science • Organic Chemistry • Resin

Industries

Chemicals

Resumes

Resumes

Dorai Ramprasad Photo 1

Global Technology Manager For Chemical Catalysts And Adsorbents

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Location:
Columbia, MD
Industry:
Chemicals
Work:
W.r. Grace
Global Technology Manager For Chemical Catalysts and Adsorbents
W.r. Grace May 2007 - Jul 2011
Program Manager
Qd Vision, Inc. Oct 2005 - Apr 2007
Senior Chemist Nanomaterials Synthesis Scale Up
Rohm and Haas Jan 2002 - Jun 2005
Market Segment Technology Leader, Ion Exchange Resins
Sabic Jun 2000 - Jan 2002
Team Leader Research Scientist
Education:
The Ohio State University 1984 - 1986
Carnegie Mellon University 1979 - 1985
Doctorates, Doctor of Philosophy, Chemistry Indian Institute of Technology, Kanpur 1971 - 1978
Master of Science, Masters, Chemistry St. Michael's High School
Skills:
Catalysis
Chemistry
Nanotechnology
Polymers
Commercialization
R&D
Process Simulation
Materials Science
Materials
Chemical Engineering
Heterogeneous Catalysis
Product Development
Nanomaterials
Polymer Chemistry
Characterization
Additives
Analytical Chemistry
Adhesives
Polymer Science
Organic Chemistry
Resin

Publications

Us Patents

Process Using Water Tolerant Lewis Acids In Catalytic Hydration Of Alkylene Oxides To Alkylene Glycols

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US Patent:
6916963, Jul 12, 2005
Filed:
Jul 14, 2003
Appl. No.:
10/619127
Inventors:
Jaap W. van Hal - Fresno TX, US
Dorai Ramprasad - Allentown PA, US
Assignee:
Saudi Basic Industries Corporation - Riyadh
International Classification:
C07C033/26
US Classification:
568811, 568833, 568867
Abstract:
Water tolerant Lewis acids are used in a process for the preparation of alkylene glycols by catalytic hydration of the corresponding alkylene oxide. The water tolerant Lewis acids can be a metal salt of a non-coordinating or weakly coordinating anion and a Group IIIB, rare earth or lanthanide, actinide or Group IVB cation. Optionally, carbon oxide may also be present. Examples of such water tolerant Lewis acids are scandium triflate, europium triflate, hafnium triflate, yttrium triflate, lanthanum triflate and ytterbium triflate. The catalyst may contain a coordinating anion instead, examples of which are scandium sulfate [Sc(SO)], scandium chloride [ScCl], scandium acetate [Sc(OAc)] and scandium nitrate [Sc(NO)]. The catalysts may also contain both a non-coordinating or weakly coordinating anion and a coordinating anion, examples of which are scandium triflate sulfate [Sc(CFSO) (SO)], scandium triflate chloride [Sc(CFSO)Cl], scandium triflate acetate [Sc(CFSO)(OAc)] and scandium triflate nitrate [Sc(CFSO)(NO)].

Semiconductor Nanocrystals And Compositions And Devices Including Same

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US Patent:
8377333, Feb 19, 2013
Filed:
May 21, 2009
Appl. No.:
12/454703
Inventors:
Dorai Ramprasad - Columbia MD, US
Craig Breen - Somerville MA, US
Jonathan S. Steckel - Bedford MA, US
Assignee:
QD Vision, Inc. - Lexington MA
International Classification:
C09K 11/08
US Classification:
2523014R, 2523016 S, 428403, 428404, 977824, 977834, 977774
Abstract:
A semiconductor nanocrystal including a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light with an improved photoluminescence quantum efficiency. Also disclosed are populations of semiconductor nanocrystals, compositions and devices including a semiconductor nanocrystal capable of emitting light with an improved photoluminescence quantum efficiency. In one embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light upon excitation with a photoluminescence quantum efficiency greater than about 65%.

Blue Emitting Semiconductor Nanocrystals And Compositions And Devices Including Same

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US Patent:
8404154, Mar 26, 2013
Filed:
May 21, 2009
Appl. No.:
12/454701
Inventors:
Craig Breen - Somerville MA, US
Jonathan S. Steckel - Bedford MA, US
Dorai Ramprasad - Columbia MD, US
Assignee:
QD Vision, Inc. - Lexington MA
International Classification:
C09K 11/08
US Classification:
2523016S, 2523014 R, 977774, 977824, 977834, 428404, 428403
Abstract:
A semiconductor nanocrystal capable of emitting blue light upon excitation. Also disclosed are devices, populations of semiconductor nanocrystals, and compositions including a semiconductor nanocrystal capable of emitting blue light upon excitation. In one embodiment, a semiconductor nanocrystal capable of emitting blue light including a maximum peak emission at a wavelength not greater than about 470 nm with a photoluminescence quantum efficiency greater than about 65% upon excitation. In another embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting blue light with a photoluminescence quantum efficiency greater than about 65% upon excitation. In a further embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material comprising at least three chemical elements, wherein the semiconductor nanocrystal is capable of emitting light including a maximum peak emission in the blue region of the spectrum upon excitation.

Methods, Systems And Catalysts For The Hydration Of Olefins

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US Patent:
20040236158, Nov 25, 2004
Filed:
Apr 26, 2004
Appl. No.:
10/831833
Inventors:
Jennifer Collin - Devon PA, US
Dorai Ramprasad - Allentown PA, US
International Classification:
C07C029/06
US Classification:
568/896000
Abstract:
The present invention provides a system, method and catalyst for olefin hydration. The method includes hydrating the olefin using a base treated, sulfonated, halogenated and acid regenerated thermally stable catalyst. In several variants, the olefin hydration comprises butene hydration, propene hydration, hydration of cyclohexene, propylene hydration, pentene hydration, hexene hydration, and heptene hydration. The present invention also provides a method of making a catalyst for olefin hydration, and provides alcohols manufactured by the catalyst(s), systems and methods described herein.

Methods, Systems And Catalysts For Esterification, Esters Made Thereby And Downstream Products Made From The Esters

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US Patent:
20050027135, Feb 3, 2005
Filed:
Jul 19, 2004
Appl. No.:
10/894166
Inventors:
Dorai Ramprasad - Allentown PA, US
Jennifer Collin - Devon PA, US
International Classification:
C07C051/00
US Classification:
554124000
Abstract:
The present invention provides a system, method and catalyst for esterification. The method of esterification includes adding to reactants of a reaction a base treated, sulfonated, halogenated thermally stable catalyst. The catalyst provides high selectivity and does not readily degrade at high temperatures. The esterification reaction are used to prepare an acetate ester, an acrylic ester, a natural fatty acid ester, a sorbitol derived ester, a phthalate, and/or a benzoate and ester derived from maleic anhydride. A system for esterification, and ester utilizing the method are also provided. Various downstream products are made from the esters created using the method described herein are made including a solvent for a surface coating, an ink, a textile, an adhesive, a plastic, a cosmetic, a surfactant, a detergent alcohol, a lubricant, a plasticizer, a flavor, and a fragrance.

Methods, Systems And Catalysts For Use In Aromatic Alkylation Reactions

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US Patent:
20050043573, Feb 24, 2005
Filed:
Aug 10, 2004
Appl. No.:
10/915148
Inventors:
Dorai Ramprasad - Allentown PA, US
Jennifer Collin - Devon PA, US
International Classification:
C07C015/00
US Classification:
585024000, 585458000
Abstract:
The present invention provides a system, method and catalyst for catalyzing alkylation reactions. The method includes catalyzing an alkylation reaction using a base treated, sulfonated, halogenated, and optionally acid regenerated thermally stable catalyst.

Catalytic Reactions Using Thermally Stable Resins

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US Patent:
20050119111, Jun 2, 2005
Filed:
Nov 12, 2004
Appl. No.:
10/986700
Inventors:
Dorai Ramprasad - Allentown PA, US
Jennifer Collin - Devon PA, US
International Classification:
B01J029/04
US Classification:
502060000
Abstract:
The present invention provides a system, method and catalyst for a variety of reactions, e.g. aldolization, etherification, oligomerization, dimerization, dehydration and condensation. The invention also includes systems for making various end products, and end products made using the systems and methods described herein.

Light-Emitting Devices And Displays With Improved Performance

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US Patent:
20090278141, Nov 12, 2009
Filed:
Nov 24, 2008
Appl. No.:
12/313779
Inventors:
Seth Coe-Sullivan - Belmont MA, US
Dorai Ramprasad - Columbia MD, US
Ioannis Kymissis - New York NY, US
Vladimir Bulovic - Lexington MA, US
Marshall Cox - North Haven CT, US
Caroline J. Roush - Somerville MA, US
Peter T. Kazlas - Sudbury MA, US
Jonathan S. Steckel - Cambridge MA, US
International Classification:
H01L 33/00
US Classification:
257 89, 257103, 257E33062, 257E33003, 257E33013, 977950
Abstract:
Light-emitting devices and displays with improved performance are disclosed. A light-emitting device includes an emissive material disposed between a first electrode, and a second electrode. Various embodiments include a device having a peak external quantum efficiency of at least about 2.2%; a device that emits light having a CIE color coordinate of x greater than 0.63; a device having an external quantum efficiency of at least about 2.2 percent when measured at a current density of 5 mA/cm. Also disclosed is a light-emitting device comprising a plurality of semiconductor nanocrystals capable of emitting red light upon excitation, wherein the device has a peak luminescent efficiency of at least about 1.5 lumens per watt. Also disclosed is a light-emitting device comprising a plurality of semiconductor nanocrystals capable of emitting red light upon excitation, wherein the device has a luminescent efficiency of at least about 1.5 lumens per watt when measured at a current density of 5 milliamps/square centimeter. Also disclosed is a light-emitting device comprising a plurality of semiconductor nanocrystals capable of emitting green light upon excitation, wherein the device has a peak external quantum efficiency of at least about 1.1 percent. Further disclosed is a light-emitting device comprising a plurality of semiconductor nanocrystals, wherein the device has a luminescent efficiency of at least about 3 lumens per watt when measured at a current density of 5 mA/cm. Further disclosed is a light-emitting device comprising a plurality of semiconductor nanocrystals capable of emitting green light upon excitation, wherein the device has an external quantum efficiency of at least about 2% when measured at a current density of 5 mA/cm. Other light-emitting devices and displays with improved performance are disclosed. Also disclosed are methods for preparing and for purifying semiconductor nanocrystals.
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Dorai S Ramprasad from Columbia, MD, age ~70 Get Report