Patents Assigned to Dow Chemical Company
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Publication number: 20120280176Abstract: A composition for removing mercaptan from a gas stream containing at least one acid gas in addition to a mercaptan, the composition comprising a physical and/or chemical solvent for H2S and an inclusion compound for the mercaptan. A process of treating gas stream using the composition. The inclusion compound is selected from the group consisting of, cyclodextrin, cryptand, calixarene, cucurbituril. The chemical solvent may be monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA, diisopropylamine (DIPA), diglycolamine (DGA) and methyldiethanolamine (MDEA). Examples of useful physical solvents include cyclotetramethylene sulfone (sulfolane) and its derivatives, aliphatic acid amides, NMP (n-methylpyrrolidone), N-alkylated pyrrolidones and corresponding piperidone, methanol and mixtures of dialkethers of polyethylene glycols. The method copirses scrubbing preferably the natural gas with an aqueous solution comprising the above compounds followed by a stripping regeneration step.Type: ApplicationFiled: July 13, 2012Publication date: November 8, 2012Applicant: DOW CHEMICAL COMPANYInventor: Stephen A. Bedell
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Patent number: 8197645Abstract: The present invention relates to a process for separating at least one propylene glycol from a mixture (M) comprising water and said propylene glycol, said process comprising (I) evaporating the mixture in at least two evaporation and/or distillation stages at decreasing operating pressures of the evaporators and/or distillation columns obtaining mixture (M?) and mixture (M?); (II) separating the mixture (M?) obtained in (I) in at least one further distillation step, obtaining a mixture (M-I) comprising at least 70 wt.-% of water and a mixture (M-II) comprising less than 30 wt.-% of water.Type: GrantFiled: December 13, 2006Date of Patent: June 12, 2012Assignees: BASF Aktiengesellschaft, The Dow Chemical CompanyInventors: Armin Diefenbacher, Hans-Georg Goebbel, Stefan Bitterlich, Hartwig Voss, Henning Schultz, Anna Forlin, Renate Patrascu
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Publication number: 20120142950Abstract: A continuous process for the production of propylene oxide comprising reacting propene with hydrogen peroxide in methanolic solution in the presence of a titanium silicalite-1 catalyst to obtain propylene oxide, wherein a reaction feed comprising propene, methanol and hydrogen peroxide is introduced into a reactor, said reaction feed containing potassium cations and phosphorus in the form of anions of at least one phosphorus oxyacid.Type: ApplicationFiled: December 6, 2011Publication date: June 7, 2012Applicants: The Dow Chemical Company, BASF SEInventors: Joaquim Henrique TELES, Kai Gumlich, Peter Bassler, Christian Bartosch, Philip Kampe, Hans-Georg Göbbel, Ulrich Müller, Richard Jacubinas
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Publication number: 20120065413Abstract: A process for producing propylene oxide comprising reacting propene with hydrogen peroxide in the presence of a catalyst to give a mixture (G1) comprising propylene oxide, unreacted propene, and oxygen; separating propylene oxide from mixture (G1) to give a mixture (GII) comprising propene and oxygen; and adding hydrogen to mixture (GII) and reducing the oxygen comprised in mixture (GII) at least partially by reaction with hydrogen in the presence of a catalyst comprising copper in elemental and/or oxidic form on a support, wherein copper is present on the support in an amount of 30 to 80 wt.-% based on the whole catalyst and calculated as CuO.Type: ApplicationFiled: May 5, 2010Publication date: March 15, 2012Applicants: The Dow Chemical Company, BASF SEInventors: Philip Kampe, Peter Resch, Soo Yin Chin, Peter Bassler, Ulrich Mueller, Goetz-Peter Schindler, Hans-Georg Goebbel, Joaquim Henrique Teles, Kai Gumlich, Thomas Grassler, Christian Bartosch, Richard Jacubinas, Meinolf Weidenbach
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Patent number: 8134018Abstract: The invention relates to a process for the epoxidation of an olefin comprising (a) reacting the olefin with hydrogen peroxide in the presence of methanol as solvent in at least two reaction stages to obtain a mixture (M-a) comprising olefin oxide, unreacted olefin, methanol and water, wherein between at least two reaction stages, olefin oxide is separated by distillation; (b) separating unreacted olefin from the mixture (M-a) by distillation to obtain a mixture (M-bi) comprising at least 80 wt.-% of olefin and a mixture (M-bii) comprising methanol, water and at least 7 wt.-% of olefin oxide; (c) separating olefin oxide from the mixture (M-bii) in at least one distillation stage to obtain a mixture (M-ci) comprising at least 99 wt.-% of olefin oxide and a mixture (M-cii) comprising water and at least 55 wt.-% of methanol; (d) separating methanol from the mixture (M-cii) in at least one distillation stage to obtain a mixture (M-di) comprising at least 85 wt.-% of methanol and up to 10 wt.Type: GrantFiled: January 9, 2006Date of Patent: March 13, 2012Assignees: BASF SE, The Dow Chemical CompanyInventors: Hans-Georg Goebbel, Henning Schultz, Peter Schultz, Renate Patrascu, Malte Schulz, Meinolf Weidenbach
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Publication number: 20110130579Abstract: A process for the preparation of a catalyst for the use in a hydrocarbon conversion reaction, said catalyst containing a titanium zeolite and carbonaceous material, the catalyst containing said carbonaceous material in an amount of from 0.01 to 0.5% by weight based on the total weight of titanium zeolite contained in the catalyst, the process comprising (i) preparing a catalyst containing the titanium zeolite and (ii) depositing carbonaceous material on the catalyst according to (i) in an amount of from 0.01 to 0.5% by weight based on the total weight of titanium zeolite contained in the catalyst by contacting said catalyst, prior to using the catalyst in said hydrocarbon conversion reaction, with a fluid containing at least one hydrocarbon in an inert atmosphere, to obtain the carbonaceous material containing catalyst, wherein in (ii), the catalyst is not contacted with an oxygen containing gas.Type: ApplicationFiled: November 26, 2010Publication date: June 2, 2011Applicants: BASF SE, The Dow Chemical CompanyInventors: Ulrich MÜLLER, Peter Rudolf, Georg Krug, Rainer Senk
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Publication number: 20110120309Abstract: The present invention relates processes of removal of acidic gases from a gas stream, comprising the steps of a) contacting a wash solution stream with said gas stream containing acidic gases to be removed to allow absorption of the acidic gases into the wash solution stream; b) withdrawing wash solution enriched with acidic gases from said wash solution stream at a first withdrawal level; c) cooling said withdrawn wash solution; and d) reintroducing said cooled wash solution to the wash solution stream at a first reintroduction level to form a mixed wash solution stream, said first reintroduction level being upstream of said first withdrawal level. The present invention also relates to systems for removal of acidic gases from a gas stream.Type: ApplicationFiled: November 24, 2009Publication date: May 26, 2011Applicants: ALSTOM TECHNOLOGY LTD, THE DOW CHEMICAL COMPANYInventors: Barath Baburao, Craig Schubert
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Publication number: 20110065939Abstract: A method for separating acetonitrile from water, comprising (i) providing a stream S1 containing at least 95 wt.-%, based on the total weight of S1, acetonitrile and water, wherein the weight ratio of acetonitrile:water is greater than 1; (ii) adding a stream P, comprising at least 95 wt.-% C3, based on the total weight of stream P, to S1 to obtain a mixed stream S2, C3 being propene optionally admixed with propane with a minimum weight ratio of propene:propane of 7:3; (iii) subjecting S2 to a temperature of 92° C. at most and a pressure of at least 10 bar, obtaining a first liquid phase L1 essentially consisting of C3, acetonitrile, and water, and a second liquid phase L2 essentially consisting of water and acetonitrile wherein the weight ratio of acetonitrile:water in L2 is less than 1; (iv) separating L1 from L2.Type: ApplicationFiled: July 16, 2010Publication date: March 17, 2011Applicants: BASF SE, The Dow Chemical CompanyInventors: Joaquim Henrique Teles, Hans-Georg Göbbel, Peter Baßler, Philip Kampe, Kai Gumlich, Christian Bartosch, Ulrich Müller, Richard Jacubinas, Natalia Trukhan, Meinolf Weidenbach, Martin Cogswell
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Patent number: 7906583Abstract: Improved adhesives are provided through the use of styrenic radial block copolymers, containing at least 40 wt % diblock copolymers, the adhesives have improved adhesive properties and a reduced elastic behavior under die-cutting conditions. Compared to conventional linear block copolymers of similar molecular weight, radial copolymers offer higher holding power and lower melt viscosity for the adhesive. They therefore contribute to an improved balance between processability and end-use properties.Type: GrantFiled: October 31, 2007Date of Patent: March 15, 2011Assignees: The Dow Chemical Company, Exxon Mobil Chemical Patents Inc.Inventors: Jacques Bernard Lechat, Michael Oliver Myers, Marie-Noelle Cazenave, Christophe Derail, Nicolas Kappes, Jurgen Schroeyers
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Patent number: 7863468Abstract: The present invention relates to a process for producing propylene oxide comprising (I) reacting propene with hydrogen peroxide in the presence of a catalyst to give a mixture (GI) comprising propylene oxide, unreacted propene, and oxygen; (II) separating propylene oxide from mixture (GI) to give a mixture (GII) comprising propene and oxygen; (III) reducing the oxygen comprised in mixture (GII) at least partially by reaction with hydrogen in the presence of a catalyst comprising Sn and at least one noble metal.Type: GrantFiled: June 20, 2006Date of Patent: January 4, 2011Assignees: BASF Aktiengesellschaft, The Dow Chemical CompanyInventors: Goetz-Peter Schindler, Christian Walsdorff, Reinhard Koerner, Hans-Georg Goebbel
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Publication number: 20100305369Abstract: The present invention relates to a continuous process for the preparation of an olefin oxide wherein an olefin is reacted with a hydroperoxidein the presence of a catalyst, and wherein the reaction which is carried out in at least three reactors operated in parallel is controlled by specifically adjusting the catalyst loads in the reactors.Type: ApplicationFiled: April 24, 2008Publication date: December 2, 2010Applicants: BASF SE, The Dow Chemical CompanyInventors: Hans-Georg Goebbel, Peter Bassler, Joaquim Henrique Teles, Peter Rudolf, Ulrich Mueller, Anna Forlin, Malte Schulz, Meinolf Weidenbach
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Publication number: 20100298128Abstract: A catalyst for the manufacture of alkylene oxide, for example ethylene oxide, by the vapor-phase epoxidation of alkene containing impregnated silver and at least one efficiency-enhancing promoter on an inert, refractory solid support, said support incorporating a sufficient amount of zirconium component (present and remaining substantially as zirconium silicate) as to enhance at least one of catalyst activity, efficiency and stability as compared to a similar catalyst which does not contain the zirconium component.Type: ApplicationFiled: July 30, 2010Publication date: November 25, 2010Applicant: THE DOW CHEMICAL COMPANYInventors: Juliana G. Serafin, Seyed R. Seyedmonir, Albert C. Lia, Hwaili Soo, Thomas Szymanski
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Publication number: 20100234518Abstract: Branched polyglycols and branched polyether functional organopolysiloxanes are disclosed as is a process for making branched polyether functional organopolysiloxanes by reacting an organohydrogensiloxane and a branched polyglycol having an unsaturated group via a hydrosilylation reaction, as well as coating compositions containing branched polyether functional organopolysiloxanes and a binder are disclosed. Coatings resulting from these compositions were more hydrophilic and had improved dirt release properties as compared to coatings containing similar, but un-branched, polyether functional organopolysiloxanes.Type: ApplicationFiled: December 22, 2006Publication date: September 16, 2010Applicants: THE DOW CHEMICAL COMPANY, DOW CORNING CORPORATIONInventors: Michael Salvatore Ferritto, Frances Marie Fournier, Michael Allen Stanga, Gerald Lawrence Witucki, Pierre T. Varineau, Robert H. Whitmarsh
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Patent number: 7786317Abstract: The present invention provides a process for the epoxidation of propene which comprises reacting propene with hydrogen peroxide in the presence of methanol as solvent and a titanium zeolite catalyst, the process further comprising separating propylene oxide from the reaction mixture to obtain a mixture comprising methanol, water, at least one carboxylic acid and at least one carbonyl compound, wherein the at least one carboxylic acid is at least partially neutralized, said process optionally comprising a hydrogenation stage.Type: GrantFiled: December 18, 2006Date of Patent: August 31, 2010Assignees: BASF Aktiengesellschaft, The Dow Chemical CompanyInventors: Hans-Georg Goebbel, Peter Bassler, Joaquim Henrique Teles, Peter Rudolf, Ulrich Mueller, Anna Forlin, Malte Schulz, Meinolf Weidenbach
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Patent number: 7727512Abstract: Compounds useful for associating with nanoparticle or microparticle emulsions to obtain magnetic resonance images permit control of the relaxivity of the signal and readily associate with the particulate components.Type: GrantFiled: October 9, 2007Date of Patent: June 1, 2010Assignees: Barnes-Jewish Hospital, The Dow Chemical CompanyInventors: Gregory M. Lanza, Samuel A. Wickline, Phillip S. Athey, Gyongyi Gulyas, Garry E. Kiefer
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Publication number: 20100121113Abstract: The present invention provides a process for producing low color glycols that comprises altering at least one condition of a reaction component and/or process stream within the process to be unfavorable for the formation of at least one color-producing contaminant intermediate. As such, such intermediates may be reduced in concentration, or even eliminated entirely, from glycols produced by the process. Since they are not present, or are present in reduced number, the intermediates cannot form color-producing contaminants in the glycols, and low color glycols are provided to the customer. Any condition that can discourage the formation of color forming contaminant intermediates can be adjusted, although conditions that can be adjusted by materials or equipment already utilized in the process, e.g.Type: ApplicationFiled: November 5, 2009Publication date: May 13, 2010Applicants: THE DOW CHEMICAL COMPANY, DOW TECHNOLOGY INVESTMENTSInventors: Zdravko I. Stefanov, Jean Paul Chauvel, JR., Abraham Gonzalez, Istvan Lengyel
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Patent number: 7692031Abstract: A method of separating propylene oxide from a mixture (M) comprising propylene oxide and methanol, said method comprising: (i) introducing said mixture (M) into an extractive distillation column; (ii) additionally introducing an extracting solvent into said extractive distillation column; (iii) distilling propylene oxide overhead from said extractive distillation column as top stream; (iv) withdrawing a bottoms stream from said extractive distillation column; (v) compressing the top stream obtained overhead in (iii) by means of at least one compressor to give a compressed vapor.Type: GrantFiled: July 6, 2005Date of Patent: April 6, 2010Assignees: BASF Aktiengesellschaft, The Dow Chemical CompanyInventors: Hans-Georg Goebbel, Henning Schultz, Peter Schultz, Renate Patrascu, Malte Schulz, Meinolf Weidenbach
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Publication number: 20100081834Abstract: The invention relates to a process for the epoxidation of an olefin comprising (a) reacting the olefin with hydrogen peroxide in the presence of methanol as solvent in at least two reaction stages to obtain a mixture (M-a) comprising olefin oxide, unreacted olefin, methanol and water, wherein between at least two reaction stages, olefin oxide is separated by distillation; (b) separating unreacted olefin from the mixture (M-a) by distillation to obtain a mixture (M-bi) comprising at least 80 wt.-% of olefin and a mixture (M-bii) comprising methanol, water and at least 7 wt.-% of olefin oxide; (c) separating olefin oxide from the mixture (M-bii) in at least one distillation stage to obtain a mixture (M-ci) comprising at least 99 wt.-% of olefin oxide and a mixture (M-cii) comprising water and at least 55 wt.-% of methanol; (d) separating methanol from the mixture (M-cii) in at least one distillation stage to obtain a mixture (M-di) comprising at least 85 wt.-% of methanol and up to 10 wt.Type: ApplicationFiled: January 9, 2006Publication date: April 1, 2010Applicant: BASF Aktiengesellschaft/The Dow Chemical CompanyInventors: Hans-Georg Goebbel, Henning Schultz, Peter Schultz, Renate Patrascu, Malte Schulz, Meinolf Weidenbach
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Publication number: 20100029960Abstract: A process for producing epoxide, the process including contacting an organic phase including at least one halohydrin(s) with at least one aqueous phase including a base in a plug-flow mixer/reactor system to disperse the organic phase in the aqueous phase via a mixing device imparting a power-to-mass ratio of at least 0.2 W/kg to convert at least a portion of the at least one halohydrin to an epoxide.Type: ApplicationFiled: July 30, 2009Publication date: February 4, 2010Applicant: THE DOW CHEMICAL COMPANYInventors: William W. Fan, Christian D. Kneupper, Sascha N. Noormann, Renate P. Patrascu, Bruce D. Hook, Charles W. Lipp, Michael D. Cloeter, Heinz G. Groenewald
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Publication number: 20090291847Abstract: A catalyst for the manufacture of alkylene oxide, for example ethylene oxide, by the vapor-phase epoxidation of alkene containing impregnated silver and at least one efficiency-enhancing promoter on an inert, refractory solid support, said support incorporating a sufficient amount of zirconium component (present and remaining substantially as zirconium silicate) as to enhance at least one of catalyst activity, efficiency and stability as compared to a similar catalyst which does not contain the zirconium component.Type: ApplicationFiled: July 31, 2009Publication date: November 26, 2009Applicant: The Dow Chemical CompanyInventors: Juliana G. Serafin, Albert C. Liu, Seyed R. Seyedmonir, Hwaili Soo, Thomas Szymanski