Abstract: Methods are provided for producing epoxidation catalysts. The present methods are able to produce catalysts having the desired loading levels of catalytic species at a lower vacuum level (having a higher minimum residual pressure) than previously appreciated by the art, thereby providing equipment cost and time savings.
Type:
Grant
Filed:
October 4, 2012
Date of Patent:
October 20, 2015
Assignee:
DOW TECHNOLOGY INVESTMENTS LLC
Inventors:
Biju M. Devassy, Albert C. Liu, Hwaili Soo
Abstract: Test method for structures, e.g., such as carriers and/or catalysts. The methods may be used to select the carriers and/or catalysts for future use. Carriers and catalysts so selected, and processes making use of these, are also provided.
Type:
Grant
Filed:
May 10, 2012
Date of Patent:
September 15, 2015
Assignee:
Dow Technology Investments LLC
Inventors:
John R. Mayer, Sasanka Raha, Balu S. Uphade, Lester K. Cantu, Remi A. Trottier, Hwaili Soo
Abstract: The present invention provides porous body precursors and shaped porous bodies. Also included are catalysts and other end-use products based upon the shaped porous bodies and thus the porous body precursors. Finally, processes for making these are provided. The porous body precursors comprise a precursor alumina blend capable of enhancing one or more properties of a shaped porous body based thereupon. The need to employ modifiers to achieve a similar result may thus be substantially reduced, or even avoided, and cost savings are thus provided, as well as savings in time and equipment costs.
Type:
Grant
Filed:
March 26, 2014
Date of Patent:
August 11, 2015
Assignee:
Dow Technology Investments LLC
Inventors:
Todd R. Bryden, Kevin E. Howard, Peter C. Lebaron, Sten A. Wallin
Abstract: A process for forming a catalyst from a catalytic metal precursor, a chelating bisphosphite and a bulky monophosphite, with a slightly greater than stoichiometric amount of chelating bisphosphite relative to catalytic metal under a CO partial pressure at least 25 psig.
Type:
Application
Filed:
August 15, 2013
Publication date:
July 30, 2015
Applicant:
DOW TECHNOLOGY INVESTMENTS LLC
Inventors:
Michael A. Brammer, Rick B. Watson, Avery L. Watkins
Abstract: At least one method to efficiently produce alkylene oxide from partial oxidation of hydrocarbons using a high efficiency heterogeneous catalyst in a fixed bed enclosed within a reaction vessel, and a reaction vessel constructed to facilitate the same.
Type:
Grant
Filed:
March 17, 2011
Date of Patent:
July 7, 2015
Assignee:
DOW TECHNOLOGY INVESTMENTS LLC
Inventors:
Max M. Tirtowidjojo, Subrata Sen, Christina Zarth, Pramod D. Patil
Abstract: A method for starting-up a high efficiency alkylene oxide catalyst is described. A feed gas comprising an alkylene, oxygen, and at least one organic chloride is introduced to the catalyst. The molar ratio of oxygen to alkylene, reaction temperature, and overall chloriding effectiveness are adjusted to specified ranges of values within a specified catalyst aging period.
Type:
Grant
Filed:
December 1, 2011
Date of Patent:
March 24, 2015
Assignee:
Dow Technology Investments LLC
Inventors:
Arun G. Basrur, Ravindra R. Tupe, Hwaili Soo, Paul V. Hinman
Abstract: Methods are provided for producing epoxidation catalysts. The present methods are able to produce catalysts having the desired loading levels of catalytic species at a lower vacuum level (having a higher minimum residual pressure) than previously appreciated by the art, thereby providing equipment cost and time savings.
Type:
Application
Filed:
October 4, 2012
Publication date:
December 18, 2014
Applicant:
DOW TECHNOLOGY INVESTMENTS LLC
Inventors:
Biju M. Divassy, Albert C. Liu, Hwaili Soo
Abstract: Methods of reducing the value of an alkylene oxide production parameter (such as alkylene oxide production rate) in a process of making an alkylene oxide by reacting an alkylene and oxygen over a high efficiency catalyst are shown and described. One method comprises reducing the concentration of oxygen in the reactor feed gas to reduce the value of the alkylene oxide production parameter.
Abstract: The extraction process for removing metal salts from an organic hydroformylation reaction fluid (“HRF”) prior to returning the HRF to a reaction zone of a hydroformylation process, the extraction process comprising the step of contacting the HRF with an aqueous buffer solution, is improved by contacting the HRF with water in addition to that present in the aqueous buffer solution, i.e., with added water.
Type:
Grant
Filed:
November 3, 2011
Date of Patent:
November 11, 2014
Assignees:
Dow Technology Investments LLC, BASF SE
Inventors:
Glenn A. Miller, Michael A. Brammer, Donald L. Campbell, Jr., Thomas C. Eisenschmid, Adrian Lord, Jens Rudolph, Hans-Rüdiger Reeh, Hans-Günter Thelen, Maximilian Walter
Abstract: The present invention relates to methods for qualifying material for using in the cleaning of alkylene oxide equipment. Qualified material is not expected to contribute to the formation of determinable amounts of alkylene oxide by-products. Methods of cleaning alkylene oxide equipment, and alkylene oxide processes incorporating these methods are also provided.
Abstract: Methods of reducing or maintaining the value of an alkylene oxide production parameter (such as alkylene oxide production rate) in a process of making an alkylene oxide by reacting an alkylene and oxygen over a high efficiency catalyst are shown and described. One method comprises reducing the concentration of oxygen in the reactor feed gas to reduce or maintain the value of the alkylene oxide production parameter.
Type:
Application
Filed:
December 6, 2012
Publication date:
October 23, 2014
Applicant:
Dow Technology Investments LLC
Inventors:
Liping Zhang, Sasanka Raha, Biju M. Devassy, Balu S. Uphade, Arun G. Basrur, Ailene Gardner Phillips, Ravindra Tupe
Abstract: Processes and systems for purifying ethylene oxide, including introducing a feed stream including ethylene oxide to a heat exchanger to heat the feed stream, feeding the heated feed stream to a distillation apparatus base below a first stage, removing from the distillation apparatus an impurity fraction as a top exit stream from the distillation apparatus located at a top take-off on the distillation apparatus, removing from the distillation apparatus an ethylene oxide stream of 99.7 weight percent purity, based on the total weight of the ethylene oxide stream, from the distillation apparatus, and removing from the distillation apparatus an aldehyde enriched fraction as a bottom stream from the distillation apparatus, where the aldehyde enriched fraction is fed directly to a glycol reactor.
Type:
Grant
Filed:
July 24, 2009
Date of Patent:
September 30, 2014
Assignee:
Dow Technology Investments LLC
Inventors:
Clarence P. Stadlwieser, Bernie B. Osborne, John P. Dever, Harvey E. Andresen, Michael L. Hutchison, Steven R. Osborne, Liping L. Zhang, Michael Habenschuss, Andrew Addie, Donald R. Culp
Abstract: A plant and process for producing alkylene oxides to control the production of silver chloride on a high efficiency silver catalyst is disclosed and described. The process involves reacting an alkylene and an organic chloride gas phase promoter with oxygen over the high efficiency silver catalyst. The sulfur concentration in the alkylene oxide reactor feed is controlled to reduce the production of silver chloride which acts as a catalyst poison.
Type:
Grant
Filed:
December 21, 2010
Date of Patent:
September 30, 2014
Assignee:
Dow Technology Investments LLC
Inventors:
William H. Henstock, Juliana G. Serafin, Albert C. Liu, Hwaili Soo, Yujun Liu, Manuk Colakyan, Sagar Petkar
Abstract: A process for conditioning a high efficiency silver catalyst used to manufacture ethylene oxide from ethylene, oxygen, and at least one organic chloride is described. A non-reactive conditioning gas comprising at least one of ethylene, oxygen, and a ballast gas is introduced to the catalyst at a conditioning temperature ranging from 150° C. to 180° C. for a selected period of at least 4 hours.
Type:
Grant
Filed:
April 3, 2012
Date of Patent:
August 26, 2014
Assignee:
Dow Technology Investments LLC
Inventors:
Liping Zhang, Ravindra Radhakisan Tupe, Ailene Gardner Phillips, Paul Victor Hinman, Hwaili Soo
Abstract: The present invention provides porous body precursors and shaped porous bodies. Also included are catalysts and other end-use products based upon the shaped porous bodies and thus the porous body precursors. Finally, processes for making these are provided. The porous body precursors comprise a precursor alumina blend capable of enhancing one or more properties of a shaped porous body based thereupon. The need to employ modifiers to achieve a similar result may thus be substantially reduced, or even avoided, and cost savings are thus provided, as well as savings in time and equipment costs.
Type:
Application
Filed:
March 26, 2014
Publication date:
July 24, 2014
Applicant:
DOW TECHNOLOGY INVESTMENTS, LLC
Inventors:
Todd R. Bryden, Kevin E. Howard, Peter C. Lebaron, Sten A. Wallin
Abstract: The present invention provides rhenium-promoted epoxidation catalysts based upon shaped porous bodies comprising a minimized percentage of their total pore volume being present in pores having diameters of less than one micron, and a surface area of at least about 1.0 m2/g. Processes of making the catalysts and using them in epoxidation processes are also provided.
Abstract: A method for producing epoxidation catalysts is provided. The catalyst comprises a support, a catalytic species, maganese and at least one alkali metal and/or promoter. The catalytic species may be silver. The catalyst is prepared by a method wherein at least a portion of the manganese is impregnated in a step separate from the at least one alkali metal and/or promoter. Advantageously, catalysts produced by the present method may exhibit greater efficiencies than catalysts produced by conventional methods. A method for the epoxidation of alkylenes using the catalysts so produced is provided as is a method for using the alkylene oxides for the production of 1,2-diols, 1,2-carbonates, 1,2-diol ethers, or alka-nolamines.
Type:
Application
Filed:
May 25, 2012
Publication date:
April 17, 2014
Applicant:
DOW TECHNOLOGY INVESTMENTS, LLC
Inventors:
Srikant Gopal, Lakshmi N. Vutukuru Murthy, Arun G. Basrur
Abstract: Test method for structures, e.g., such as carriers and/or catalysts. The methods may be used to select the carriers and/or catalysts for future use. Carriers and catalysts so selected, and processes making use of these, are also provided.
Type:
Application
Filed:
May 10, 2012
Publication date:
April 3, 2014
Applicant:
DOW TECHNOLOGY INVESTMENTS, LLC
Inventors:
John R. Mayer, Sasanka Raha, Balu S. Uphade, Lester K. Cantu, Remi A. Trottier, Hwaili Soo
Abstract: The present invention provides porous body precursors and shaped porous bodies. Also included are catalysts and other end-use products based upon the shaped porous bodies and thus the porous body precursors. Finally, processes for making these are provided. The porous body precursors comprise a precursor alumina blend capable of enhancing one or more properties of a shaped porous body based thereupon. The need to employ modifiers to achieve a similar result may thus be substantially reduced, or even avoided, and cost savings are thus provided, as well as savings in time and equipment costs.
Type:
Grant
Filed:
April 29, 2009
Date of Patent:
April 1, 2014
Assignee:
Dow Technology Investments LLC
Inventors:
Todd R. Bryden, Kevin E. Howard, Peter C. LeBaron, Sten A. Wallin