David A Heaps

US Patent:

20230009131, Jan 12, 2023

Filed:

Jul 8, 2022

Appl. No.:

17/860239

Inventors:

- Milan, IT
Diego Brita - Ferrara, IT
Christopher D. Smith - Kingwood TX, US
David A. Heaps - Pearland TX, US
Daniel F. White - Houston TX, US
David L. Ramage - Friendswood TX, US

Assignee:

Basell Poliolefine Italia S.r.l. - Milan

International Classification:

C08J 11/16

Abstract:

Pre-treatment methods for polyolefin-based feed streams before depolymerization are described. Polyolefins are separated from other material in the polyolefin-based feed stream using density differences in an aqueous solution, which allows for a pre-treatment method that does not affect the depolymerization catalyst. By removing the non-polyolefin materials from the feed stream, the depolymerization of the polyolefin material can proceed at lower temperatures for longer cycles. This results in a more efficient process with a smaller carbon footprint.

US Patent:

20170210690, Jul 27, 2017

Filed:

Apr 10, 2017

Appl. No.:

15/483681

Inventors:

- Houston TX, US
David L. Ramage - Houston TX, US
David A. Heaps - Pearland TX, US

Assignee:

LyondellBasell Acetyls, LLC - Houston TX

International Classification:

C07C 51/12
G01N 21/65

Abstract:

The present disclosure provides for a method for measuring the concentration of one or more components in a reactor or a separation unit of an acetic acid process by Raman spectroscopic analyses. In some embodiments, the conditions in the reactor or in any subsequent step of the acetic acid production process are adjusted in response to the measured concentration of one or more components.

US Patent:

20150323451, Nov 12, 2015

Filed:

May 8, 2014

Appl. No.:

14/273252

Inventors:

- Tokyo, JP
David HEAPS - Yardley PA, US
Mark SULLIVAN - Framingham MA, US

Assignee:

Advantest Corporation - Tokyo

International Classification:

G01N 21/3563
G01B 11/06
G01N 21/3586

Abstract:

A method of determining a density of a roller compacted ribbon is disclosed. The method comprises compacting dry pharmaceutical powder between press rollers of a roller compactor to produce a compact ribbon. The method also comprises determining a thickness at a point on the compact ribbon in a non-invasive manner after it has rolled out from in between the press rollers. Further, the method comprises passing the compact ribbon through a gap in between the terahertz emitter and the terahertz detector. Next, the method comprises determining a refractive index at the point on the compact ribbon using a measurement value from the terahertz emitter and the terahertz detector and a measured value for the thickness at the point. Finally, the method comprises computing a density of the compact ribbon at the point using a value of the refractive index.

US Patent:

20150323452, Nov 12, 2015

Filed:

Jul 17, 2014

Appl. No.:

14/334529

Inventors:

- Tokyo, JP
David Heaps - Yardley PA, US
Mark Sullivan - Framingham MA, US
Richard McKay - East Windsor NJ, US
Eiji Kato - Princeton NJ, US

International Classification:

G01N 21/3586
G01N 21/3563
G01B 11/06
G01N 33/15

Abstract:

A method of determining material properties for an object under test is disclosed. The method comprises determining a thickness at a point on the object under test in a non-invasive manner. It also comprises obtaining a terahertz measurement by passing terahertz radiation through the object under test using a terahertz emitter and detecting the terahertz radiation using a terahertz detector. Finally, it comprises determining an optical property at the point on the object under test using a measurement value from the terahertz emitter and the terahertz detector and a measured value for the thickness at the point.

US Patent:

20150090881, Apr 2, 2015

Filed:

Sep 30, 2013

Appl. No.:

14/042431

Inventors:

Edward E. KING - Dayton OH, US
David A. HEAPS - Yardley PA, US
Gregory Scott SELF - El Dorado Hills CA, US
Richard R. MCKAY - East Windsor NJ, US
Mark J. SULLIVAN - Framingham MA, US

International Classification:

G01N 21/35
G01N 21/17
B65D 1/36

US Classification:

25033911, 206564, 2503418, 2503381, 264308, 2643281

Abstract:

A holder and apparatus for terahertz imaging and/or spectroscopy of beads, particles or microparticles, and methods for terahertz imaging and/or spectroscopy of beads, particles or microparticles and making the holder are disclosed. The holder includes a tray having a substantially planar upper surface, and one or more offsets above or below the substantially planar upper surface. Each offset is configured to hold one of the beads, particles or microparticles, and has a height or depth configured to minimize or eliminate interference between reflections of the terahertz radiation from the tray and reflections of the terahertz radiation from the bead, particle or microparticle in or on the offset.