Robert Leroy Larson

US Patent:

D2876868, Jan 13, 1987

Filed:

Jul 19, 1984

Appl. No.:

6/632414

Inventors:

Robert W. Larson - Berwyn IL
Edward C. Schwass - Hanover Park IL
Gary W. Larson - Berwyn IL

US Classification:

D 7 76

US Patent:

20180265429, Sep 20, 2018

Filed:

May 24, 2018

Appl. No.:

15/989084

Inventors:

- Des Plaines IL, US
Robert B. Larson - Lisle IL, US

International Classification:

C07C 6/12
C07C 2/86
C07C 5/27
C07C 4/18

Abstract:

This present disclosure relates to processes and apparatuses for toluene methylation in an aromatics complex for producing paraxylene. More specifically, the present disclosure relates to processes and apparatuses wherein a toluene methylation zone is integrated within an aromatics complex for producing paraxylene thus allowing no benzene byproduct to be produced. This may be accomplished by incorporating a toluene methylation process into the aromatics complex and recycling the benzene to the transalkylation unit the aromatics complex.

US Patent:

20150065768, Mar 5, 2015

Filed:

Aug 29, 2013

Appl. No.:

14/014134

Inventors:

- Des Plaines IL, US
Robert B. Larson - Naperville IL, US
John B. Robertson - Lake Zurich IL, US

Assignee:

UOP LLC - Des Plaines IL

International Classification:

C07C 6/06
C07C 5/27

US Classification:

585304, 585478

Abstract:

Methods and systems are provided for producing a xylene product. The method includes fractionating a feed stream in a feed fractionator to produce a feed bottoms stream and a feed overhead stream. The feed stream includes aromatic compounds and non-aromatic compounds, and more than 5 weight percent of the non-aromatic compounds have a boiling point above 105 C. at one atmosphere of pressure. The feed bottoms stream is de-ethylated in a heavy aromatics conversion zone to produce a de-ethylated aromatics stream and a light gases stream, where non-aromatic compounds are converted to light gases in the light gases stream. The de-ethylated aromatics stream is fractionated to produce a heavy aromatics stream and an intermediate aromatics stream, and a desired isomer stream is recovered from the intermediate aromatics stream and an isomerized stream in an isomer recovery process. The isomer recovery process produces an isomer raffinate stream, and the isomer raffinate stream is isomerized in an isomerization zone to produce the isomerized stream.