Printer Friendly

Praxair Receives Patent for Fermentation Method Using Oxygen.

DANBURY, Conn.--(BUSINESS WIRE)--Nov. 16, 1998--Praxair, Inc. (NYSE: PX) today announced receipt of U.S. Patent No. 5,798,254 for a direct oxygen injection process for fermentation that can increase productivity up to 100 percent over air-based processes without major capital expenditures.

Praxair estimates that chemical and life sciences companies producing antibiotics, food additives and other chemicals produced by fermentation will use the Praxair technology to lower the unit operating costs of existing bio-reactors.

The Praxair patent covers an air and oxygen injection process in airlifted fermentation equipment. The Praxair technology injects highly dispersed oxygen bubbles into the fermentation broth, allowing oxygen to be introduced through any conventional port in the fermenter while minimizing coalescence with air bubbles traveling through the broth.

The air provides agitation and strips carbon dioxide and other byproducts from the process, while the oxygen sustains organism growth rates to desired levels during primary and secondary metabolism. In some processes, yield or selectivity may be improved due to the availability of oxygen. The Praxair technique also allows the fermenters to operate at higher oxygen uptake rates than other means, resulting in the highest possible yield or selectivity improvements.

In addition to yield and productivity benefits, the direct injection technology improves the efficiency of oxygen use, lowers air compression costs, and minimizes batch failure during emergency power failures.

The process was tested at commercial scale in a Pfizer Inc (NYSE: PFE) pharmaceutical facility.

In addition, Praxair offers technologies for direct injection in stirred tank reactors which provide similar benefits.

Praxair is the second largest supplier of industrial and specialty gases to chemical companies worldwide, with 1997 sales of more than $700 million to this segment. Using its industrial gas know-how and patented technologies, Praxair works with chemical customers to help them lower costs, improve productivity and meet environmental goals.

Praxair is the largest industrial gases company in North and South America, and one of the largest worldwide, with 1997 sales of $4.7 billion. The company produces, sells and distributes atmospheric, process and specialty gases, and high-performance surface coatings. Praxair is a recognized leader in the commercialization of new technologies that bring productivity and environmental benefits to a diverse group of industries. For more information, visit Praxair on the Internet at
COPYRIGHT 1998 Business Wire
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1998, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

Article Details
Printer friendly Cite/link Email Feedback
Publication:Business Wire
Geographic Code:1USA
Date:Dec 7, 1998
Previous Article:Sempra Energy Becomes a STAPLES Center Founding Partner in Aggressive Branding Launch.
Next Article:Citygate Launches Swedish Mutual Fund Internet Site; Highlights Morningstar Methods.

Related Articles
Praxair Receives Doe Funding to Test Steel Technology Using Hot Oxygen Injection.
Birmingham Steel Installs Praxair Technology in Seattle; Coherent Jet Technology Expected to Boost Productivity, Lower Maintenance Costs.
Praxair Receives Patent for Oxygen Injection in Fluidized Bed Reactors.
Praxair Installs Patented Praxair Steel-Making Technology At MACSTEEL in Jackson, Mich.
Praxair Receives Second Patent for Coherent Jet Technology.
Praxair Receives Patent for Oxygen-based Method for Producing Vinyl Acetate.
Correction to Praxair Patent Announcement, BW1129.
Waupaca Honors Praxair with Certified Supplier Award.
Praxair Receives New Patent for CoJet Gas Injection System and Files Patent Infringement Lawsuit Against American Combustion, Inc.
Microbubbles enhance oxygen transfer in xanthan fermentations.

Terms of use | Privacy policy | Copyright © 2019 Farlex, Inc. | Feedback | For webmasters