Patents by Inventor David John Watson
David John Watson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230257332Abstract: A process for refining a crude ethylene glycol stream comprising monoethylene glycol and at least one acid contaminant is disclosed. The process comprises reacting the acid contaminant with the monoethylene glycol in at least one reaction zone to form an ester and removing the ester in a separation step.Type: ApplicationFiled: September 3, 2021Publication date: August 17, 2023Inventors: John SWINNEY, Paul GORDON, David John WATSON, Graham REED
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Patent number: 11198664Abstract: The present invention is directed to a process for the purification of ethylene glycol from a crude stream thereof.Type: GrantFiled: June 26, 2018Date of Patent: December 14, 2021Assignee: Johnson Matthey Davy Technologies LimitedInventors: Simon Jackson, Adam Armour Snaith, Michael William Marshall Tuck, David John Watson, Michael Anthony Wood
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Patent number: 11053186Abstract: A process for the production of glycolic acid or a derivative thereof comprises: reacting formaldehyde with carbon monoxide and water in a carbonylation reactor in the presence of a sulfur catalyst, said reactor operating under suitable conditions, such that glycolic acid is formed; recovering a first product stream comprising glycolic acid, impurities and a sulfur species in the carbonylation reactor; passing the first product stream to an esterification reactor where it is subjected to esterification to form an alkylglycolate and wherein the esterification is catalysed by the sulfur species recovered in the first product stream; recovering a second product stream comprising the alkylglycolate, sulfur species and impurities from the esterification reactor; separating the sulfur species from the second product stream and recycling it to the carbonylation reactor in step (a) to form a sulphur depleted second product stream; separating the alkylglycolate from the sulphur depleted second product stream in a distType: GrantFiled: April 3, 2020Date of Patent: July 6, 2021Assignee: Johnson Matthey Davy Technologies LimitedInventors: Dena Roberts, David John Watson, John Swinney
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Publication number: 20200239395Abstract: A process for the production of glycolic acid or a derivative thereof comprises: reacting formaldehyde with carbon monoxide and water in a carbonylation reactor in the presence of a sulfur catalyst, said reactor operating under suitable conditions, such that glycolic acid is formed; recovering a first product stream comprising glycolic acid, impurities and a sulfur species in the carbonylation reactor; passing the first product stream to an esterification reactor where it is subjected to esterification to form an alkylglycolate and wherein the esterification is catalysed by the sulfur species recovered in the first product stream; recovering a second product stream comprising the alkylglycolate, sulfur species and impurities from the esterification reactor; separating the sulfur species from the second product stream and recycling it to the carbonylation reactor in step (a) to form a sulphur depleted second product stream; separating the alkylglycolate from the sulphur depleted second product stream in a distType: ApplicationFiled: April 3, 2020Publication date: July 30, 2020Inventors: Dena Roberts, David John Watson, John Swinney
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Publication number: 20200216377Abstract: The present invention is directed to a process for the purification of ethylene glycol from a crude stream thereof.Type: ApplicationFiled: June 26, 2018Publication date: July 9, 2020Inventors: Simon JACKSON, Adam Armour SNAITH, Michael William Marshall TUCK, David John WATSON, Michael Anthony WOOD
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Patent number: 10640443Abstract: A process for the production of glycolic acid or a derivative thereof comprises: reacting formaldehyde with carbon monoxide and water in a carbonylation reactor in the presence of a sulfurcatalyst, said reactor operating under suitable conditions, such that glycolic acid is formed; recovering a first product stream comprising glycolic acid, impurities and a sulfur species in the carbonylation reactor; passing the first product stream to an esterification reactor where it is subjected to esterification to form an alkylglycolate and wherein the esterification is catalysed by the sulfur species recovered in the first product stream; recovering a second product stream comprising the alkylglycolate, sulfur species and impurities from the esterification reactor; separating the sulfur species from the second product stream and recycling it to the carbonylation reactor in step (a) to form a sulphur depleted second product stream; separating the alkylglycolate from the sulphur depleted second product stream in a distiType: GrantFiled: September 15, 2017Date of Patent: May 5, 2020Assignee: Johnson Matthey Davy Technologies LimitedInventors: Dena Roberts, David John Watson, John Swinney
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Publication number: 20190248724Abstract: A process for the production of glycolic acid or a derivative thereof comprises: reacting formaldehyde with carbon monoxide and water in a carbonylation reactor in the presence of a sulfurcatalyst, said reactor operating under suitable conditions, such that glycolic acid is formed; recovering a first product stream comprising glycolic acid, impurities and a sulfur species in the carbonylation reactor; passing the first product stream to an esterification reactor where it is subjected to esterification to form an alkylglycolate and wherein the esterification is catalysed by the sulfur species recovered in the first product stream; recovering a second product stream comprising the alkylglycolate, sulfur species and impurities from the esterification reactor; separating the sulfur species from the second product stream and recycling it to the carbonylation reactor in step (a) to form a sulphur depleted second product stream; separating the alkylglycolate from the sulphur depleted second product stream in a distiType: ApplicationFiled: September 15, 2017Publication date: August 15, 2019Inventors: Dena ROBERTS, David John WATSON, John SWINNEY
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Patent number: 10335774Abstract: A catalyst system for a liquid phase carbonylation reaction comprising a homogeneous acid catalyst component and a porous solid component, in particular for use in the formation of glycolic acid by carbonylation of formaldehyde. The homogeneous acid catalyst component is, for instance, sulphuric acid while the solid component can be unfunctionalized silica. A process for the carbonylation of an aldehyde to form a carboxylic? acid or derivative thereof is also described. The process comprises the steps of contacting the catalyst with carbon monoxide, water and the aldehyde.Type: GrantFiled: March 24, 2016Date of Patent: July 2, 2019Assignee: Johnson Matthey Davy Technologies LimitedInventors: Simon Wayne Jackson, Adam Armour Snaith, Michael William Marshall Tuck, David John Watson
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Patent number: 10091460Abstract: Various embodiments of systems, methods, computer devices, and computer software for providing an asynchronous online viewing party are provided. One embodiment comprises a system for providing an online viewing party. One such system comprises: a server operatively coupled to a database for supporting the online viewing party, the database comprising: content to be asynchronously provided to participants of the online viewing party; and time-based events provided by one or more of the participants, the time-based events associated with the content and linked to corresponding locations in the content; and a user interface configured to interface with the server, the user interface comprising logic configured to display the content and the time-based events.Type: GrantFiled: March 31, 2008Date of Patent: October 2, 2018Assignee: Disney Enterprises, Inc.Inventors: Jonathan David Barsook, David Christian Ehlers, Jason Richard Grant, Khai Tuan Tran, David John Watson, Nicklas Lee Wilson
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Patent number: 10087131Abstract: A process for the production of glycolic acid or derivatives thereof from formaldehyde comprising reacting formaldehyde with carbon monoxide and water in the presence of a silica catalyst, wherein from about 200 to about 5000 ppm of an alkyl silyl sulfonic acid is supplied to the reaction.Type: GrantFiled: March 23, 2016Date of Patent: October 2, 2018Assignee: Johnson Matthey Davy Technologies LimitedInventors: Simon Wayne Jackson, Adam Armour Snaith, Michael William Marshall Tuck, David John Watson
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Publication number: 20180104673Abstract: A catalyst system for a liquid phase carbonylation reaction comprising a homogeneous acid catalyst component and a porous solid component, in particular for use in the formation of glycolic acid by carbonylation of formaldehyde. The homogeneous acid catalyst component is, for instance, sulphuric acid whilst the solid component can be unfunctionalised silica. A process for the carbonylation of an aldehyde to form a carboxylic? acid or derivative thereof is also described. The process comprises the steps of contacting the catalyst with carbon monoxide, water and the aldehyde.Type: ApplicationFiled: March 24, 2016Publication date: April 19, 2018Inventors: Simon Wayne JACKSON, Adam Armour SNAITH, Michael William Marshall TUCK, David John WATSON
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Publication number: 20180086686Abstract: A process for the production of glycolic acid or derivatives thereof from formaldehyde comprising reacting formaldehyde with carbon monoxide and water in the presence of a silica catalyst, wherein from about 200 to about 5000 ppm of an alkyl silyl sulfonic acid is supplied to the reaction.Type: ApplicationFiled: March 23, 2016Publication date: March 29, 2018Inventors: Simon Wayne JACKSON, Adam Armour SNAITH, Michael William Marshall TUCK, David John WATSON
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Publication number: 20090249223Abstract: Various embodiments of systems, methods, computer devices, and computer software for providing an asynchronous online viewing party are provided. One embodiment comprises a system for providing an online viewing party. One such system comprises: a server operatively coupled to a database for supporting the online viewing party, the database comprising: content to be asynchronously provided to participants of the online viewing party; and time-based events provided by one or more of the participants, the time-based events associated with the content and linked to corresponding locations in the content; and a user interface configured to interface with the server, the user interface comprising logic configured to display the content and the time-based events.Type: ApplicationFiled: March 31, 2008Publication date: October 1, 2009Inventors: Jonathan David Barsook, David Christian Ehlers, Jason Richard Grant, Khai Tuan Tran, David John Watson, Nicklas Lee Wilson
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Patent number: 7553397Abstract: A process is described for the recovery of substantially pure ethyl acetate from a feedstock including ethyl acetate, ethanol and water. The process includes supplying the feedstock to a first distillation zone maintained under first distillation conditions effective for distilling from the feedstock a first distillate including ethyl acetate, ethanol, and less than about 10 mol % water. The first distillate is recovered from the first distillation zone and is supplied to a second distillation zone maintained under second distillation conditions, which include use of a higher pressure than that of the first distillation zone. The second distillation conditions are effective for distilling from the first distillate a second distillate including ethanol, water, and a minor proportion of ethyl acetate and yielding a substantially pure ethyl acetate bottom product, which is recovered. The second distillate is returned to the first distillation zone.Type: GrantFiled: September 29, 1999Date of Patent: June 30, 2009Assignee: Davy Process Technology LimitedInventors: Stephen William Colley, Christopher Richard Fawcett, Mohammad Sharif, Michael William Marshall Tuck, David John Watson, Michael Anthony Wood
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Patent number: 7418881Abstract: A multi-stage dilution device, comprising a first stage dilution apparatus (A), and a second stage dilution apparatus (B), each of the stage dilution device comprising:—(i) a housing (1) having a diluent inlet (7); (ii) a sample inlet (2) having a sample introducer within the housing (1) adapted to introduce the sample at an introducer point (4) within the housing (1); and, (iii) a mixing conduit (5) mounted at least partially within the housing (1), the mixing conduit (5) having an inlet section comprising a mouth (10), and a fluid outlet (8), and a throat section (9) capable of producing a pressure drop within the mixing conduit (5), the pressure drop being sufficient to draw sample through the sample inlet (2); the introducer point (4) of the sample inlet (2) being proximate the mixing conduit inlet; and wherein the fluid output (8) of the first stage dilution apparatus (A) is in communication with the sample inlet (2) of the second stage dilution apparatus (B).Type: GrantFiled: February 16, 2004Date of Patent: September 2, 2008Assignee: Malvern Instruments LimitedInventors: David John Watson, Lewis Meurig Jones, James Franklin Kovach
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Patent number: 6778271Abstract: A particle size distribution analysis apparatus comprising a sample measurement zone adapted to define a sample of particles, a light emitting means adapted to provide a source of light incident upon the sample measurement zone, and at least a first detection means adapted to measure light levels in the apparatus at particular scattering angles and output a signal to a computation means enabling the particle size distribution of particles contained within the sample to be determined, wherein the computation means is adapted, in use, to calculate a particle size distribution taking into account reflections by the measurement zone of light scattered off the particles.Type: GrantFiled: August 20, 1999Date of Patent: August 17, 2004Assignee: Malvern Instruments LimitedInventors: David John Watson, Clive Patrick Ashley Catterall, Duncan Edward Stephenson
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Publication number: 20030030802Abstract: A particle size distribution analysis apparatus comprising a sample measurement zone adapted to define a sample of particles, a light emitting means adapted to provide a source of light incident upon the sample measurement zone, and at least a first detection means adapted to measure light levels in the apparatus at particular scattering angles and output a signal to a computation means enabling the particle size distribution of particles contained within the sample to be determined, wherein the computation means is adapted, in use, to calculate a particle size distribution taking into account reflections by the measurement zone of light scattered off the particlesType: ApplicationFiled: August 20, 1999Publication date: February 13, 2003Inventors: DAVID JOHN WATSON, CLIVE PATRICK ASHLEY CATTERALL, DUNCAN EDWARD STEPHENSON
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Patent number: 6177994Abstract: A particle size distribution analysis apparatus wherein there are provided a sample measurement zone adapted to contain a sample of particles, a light emitting means adapted to provide a source of light incident upon the measurement zone, and a detection means adapted to measure light levels at different scattering angles and to output signals to a computation means, enabling the size of particles contained within the sample to be determined, wherein the light emitting means comprises a first light source emitting a substantially monochromatic first wavelength of light and a second light source emitting a substantially monochromatic second, different, wavelength of light.Type: GrantFiled: August 20, 1999Date of Patent: January 23, 2001Assignee: Malvern Instruments LimitedInventors: David John Watson, Clive Patrick Ashley Catterall, Duncan Edward Stephenson
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Patent number: 4119624Abstract: The disperse monoazo dyestuffs of the formula:- ##STR1## wherein U is hydrogen, chlorine, bromine, cyano, lower alkyl, lower alkoxy or a group of the formula --CONT.sup.1 T.sup.2, --COOT.sup.3 or --SO.sub.2 T.sup.3 ;V is hydrogen, chlorine, bromine, cyano or lower alkoxycarbonyl;W is hydrogen, cyano, nitro, thiocyano, chlorine, bromine or a group of the formula --SO.sub.2 NT.sup.1 T.sup.2, --COOT.sup.3 or --SO.sub.2 T.sup.3 ;Q is hydrogen, chlorine, bromine, lower alkoxy or a --COOT.sup.3 group;R is cyano lower alkyl;A and A.sup.Type: GrantFiled: April 11, 1975Date of Patent: October 10, 1978Assignee: Imperial Chemical Industries LimitedInventors: Violet Boyd, Brian Ribbons Fishwick, David John Watson