Grt, Inc.

University of California

Dow Global Technolgoies LLC

Ashley W Breed

Eric W McFarland

Philip Grosso

Michael J Weiss

Jeffrey H Sherman

Galen D Stucky

Michael Wyrsta

Sagar B Gadewar

Peter K Stoimenov

Paul Aaron Gillis

Ivan Marc Lorkovic

Dennis Wade Jewell

Andrei S Merenov

Peter C Ford

Daniel J Reed

Dieter J Schaefer

Leroy E Laverman

Shouli Sun

Michael Francis Doherty

Gerard I Jansma

John J Anderson

Michael D Wyrsta

Eric W Mcfarland

The present invention a process and apparatus for the production of methylene diphenyl diisocyanate (MDI) isomer mixtures with a low 2,2'-MDI isomer content and a high 2,4&#x2032;-MDI isomer content. The resulting mixtures have an increased reactivity and are acceptable in food grade application due to the reduction in primary aromatic amines formed during the curing process. The process and apparatus also include controlling the amount of 4,4&#x2032;-MDI, which is the most reactive isomer in the mixture allowing use in a wide variety of applications.

Process for the production of methylene diphenyl diisocyanate isomer mixtures with specific isomer distributions and new products derived

A process is provided for separating one or more light gases from bromine or chlorine using one or more physical separations and contact with a chemical scrubber to recover additional halogen. In one aspect, the process comprises (a) providing a feed of halogen containing one or more light gases to a distillation column or flash vaporizer; (b) operating the distillation column or flash vaporizer to separate the feed into (i) a first liquid containing a major amount of halogen and no more than a minor amount of light gas(es), and (ii) a first vapor containing a major amount of light gas(es) and no more than a minor amount of halogen; and (c) providing the vapor to a chemical scrubber to recover halogen from the vapor.

Separation of light gases from halogens

Improvements in previously disclosed methods of and apparatuses for converting alkanes, alkenes, and aromatics to olefins, alcohols, ethers, and aldehydes includes: safety improvements, use of alternative feedstocks, process simplification, improvements to the halogenation step, improvements to the reproportionation step, improvements to the solid oxide reaction, improvements to solid oxide regeneration, improvements in separations, maintenance, start-up, shut-down, and materials of construction.

Hydrocarbon conversion process improvements

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Goleta, CA, United States of America

Ashley W Breed