Patents by Inventor Wolfgang Roebke
Wolfgang Roebke 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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Patent number: 4551322Abstract: There are produced crystalline zeolite powders of Type A with the composition1.0.+-.0.2 M.sub.2/n O:Al.sub.2 O.sub.3 :1.85.+-.0.5 SiO.sub.2.y H.sub.2 Owhere M is a metal cation, n is its valence and y has a value up to 6 with 50 weight % of the particles not over 4.9.mu. and with a particle spectrum______________________________________ Fraction (.mu.) Portion (weight %) ______________________________________ <3 10 to 60 <5 55 to 95 <10 93 to 99 <15 96 to 100 ______________________________________by hydrothermally crystallizing a SiO.sub.2, Al.sub.2 O.sub.3, Na.sub.2 O and water containing alkali aluminate, water, silicate synthesis mixture with an optional tempering step wherein in a given case during the crystallization or tempering step instead of stirring shearing forces are employed. The process comprises mixing with stirring (1) an aqueous alkali silicate solution and (2) an aqueous sodium hydroxide with a NaOH content of 0.Type: GrantFiled: March 14, 1983Date of Patent: November 5, 1985Assignees: Degussa Aktiengesellschaft, Henkel Kommandelgesellschaft auf AktienInventors: Hans Strack, Wolfgang Roebke, Dieter Kneitel, Ehrfried Parr
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Patent number: 4305916Abstract: There are produced crystalline zeolite powders of Type A with the composition1.0.+-.0.2M.sub.2/n O:Al.sub.2 O.sub.3 :1.85.+-.0.5SiO.sub.2.yH.sub.2 Owhere M is a metal cation, n is it valence and y has a value up to 6 with 50 weight % of the particles not over 4.3.mu. and with a particle spectrum:______________________________________ Fraction (.mu.) Portion (weight %) ______________________________________ <3 18 to 38 <5 70 to 82 <10 93 to 99 <15 96 to 100 ______________________________________by hydrothermally crystallizing a SiO.sub.2, Al.sub.2 O.sub.3, Na.sub.2 O and water containing alkali aluminate, water, silicate synthesis mixture with an optional tempering step wherein in a given case during the crystallization or tempering step instead of stirring shearing forces are employed. The process comprises providing an aqueous alkali aluminate liquor having a temperature of 30.degree. to 100.degree. C. and containing 0.1 to 100 grams of Al.sub.2 O.sub.3 /l and 1 to 200 grams of Na.sub.Type: GrantFiled: October 27, 1977Date of Patent: December 15, 1981Assignee: Degussa & Henkel Kommanditgesellschaft Auf AktienInventors: Hans Strack, Wolfgang Roebke, Dieter Kneitel, Ehrfried Parr
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Patent number: 4303626Abstract: There are produced crystalline zeolite powders of Type A with the composition1.0.+-.0.2 M.sub.2/n O:Al.sub.2 O.sub.3 :1.85.+-.0.5 SiO.sub.2 .multidot.y H.sub.2 Owhere M is a metal cation, n is its valence and y has a value up to 6 with 50 weight % of the particles not over 6.2.mu. and with a particle spectrum:______________________________________ Fraction (.mu.) Portion (weight %) ______________________________________ <3 10 to 60 <5 25 to 95 <10 80 to 99 <15 92 to 100 ______________________________________by hydrothermally crystallizing a SiO.sub.2, Al.sub.2 O.sub.3, Na.sub.2 O and water containing alkali aluminate, water, silicate synthesis mixture with an optional tempering step wherein in a given case during the crystallization or tempering step instead of stirring shearing forces are employed. The process comprises providing an aqueous alkali aluminate liquor having a temperature of 50.degree. to 90.degree. C. and containing 0.1 to 100 grams of Al.sub.2 O.sub.3 /l and 1 to 200 grams of Na.Type: GrantFiled: October 27, 1977Date of Patent: December 1, 1981Assignee: Degussa & Henkel Kommanditgesellschaft auf AktienInventors: Hans Strack, Wolfgang Roebke, Dieter Kneitel, Ehrfried Parr
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Patent number: 4303629Abstract: There are produced crystalline zeolite powders of Type A with the composition 1.0.+-.0.2 M.sub.2/n O:Al.sub.2 O.sub.3 :1.85.+-.0.5 SiO.sub.2 .multidot.y H.sub.2 O where M is a metal cation, n is its valence and y has a value up to 6 with 50 weight % of the particles not over 4.0.mu. and with a particle spectrum______________________________________ Fraction (.mu.) Portion (weight %) ______________________________________ <3 35 to 60 <5 82 to 95 <10 93 to 99 <15 96 to 100 ______________________________________by hydrothermally crystallizing a SiO.sub.2, Al.sub.2 O.sub.3, Na.sub.2 O and water containing alkali aluminate, water, silicate synthesis mixture with optionally a tempering step wherein in a given case during the crystallization or tempering step instead of stirring shearing forces are employed. The process comprises providing an aqueous alkali silicate soluton, heating it to a temperature between 30.degree. and 80.degree. C.Type: GrantFiled: October 27, 1977Date of Patent: December 1, 1981Assignee: Degussa & Henkel Kommanditgesellschaft auf AktienInventors: Hans Strack, Wolfgang Roebke, Dieter Kneitel, Ehrfried Parr
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Patent number: 4303627Abstract: There are produced crystalline zeolite powders of Type A with the composition 1.0.+-.0.2 M.sub.2/n O:Al.sub.2 O.sub.3 :1.85.+-.0.5 SiO.sub.2 .multidot.y H.sub.2 O where M is a metal cation, n is its valence and y has a value up to 6 with 50 weight % of the particles not over 5.9.mu. and with a particle spectrum______________________________________ Fraction (.mu.) Portion (weight %) ______________________________________ <3 15 to 25 <5 35 to 55 <10 80 to 94 <15 96 to 100 ______________________________________by hydrothermally crystallizing a SiO.sub.2, Al.sub.2 O.sub.3, Na.sub.2 O and water containing alkali aluminate, water, silicate synthesis mixture with an optional tempering step wherein in a given case during the crystallization or tempering step instead of stirring shearing forces are employed. The process comprises providing water in a container, simultaneously feeding into the water at a temperature of 30.degree. to 100.degree. C.Type: GrantFiled: October 27, 1977Date of Patent: December 1, 1981Assignee: Degussa & Henkel Kommanditgesellschaft auf AktienInventors: Hans Strack, Wolfgang Roebke, Dieter Kneitel, Ehrfried Parr
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Patent number: 4303628Abstract: There are produced crystalline zeolite powders of Type A with the composition1.0.+-.0.2 M.sub.2/n O:Al.sub.2 O.sub.3 :1.85.+-.0.5 SiO.sub.2 .multidot.y H.sub.2 Owhere M is a metal cation, n is its valence and y has a value up to 6 with 50 weight % of the particles not over 4.9.mu. and with a particle spectrum______________________________________ Fraction (.mu.) Portion (weight %) ______________________________________ <3 10 to 60 <5 55 to 95 <10 93 to 99 <15 96 to 100 ______________________________________by hydrothermally crystallizing a SiO.sub.2, Al.sub.2 O.sub.3, Na.sub.2 O and water containing alkali aluminate, water, silicate synthesis mixture with an optional tempering step wherein in a given case during the crystallization or tempering step instead of stirring shearing forces are employed. The process comprises mixing with stirring (1) an aqueous alkali silicate solution and (2) an aqueous sodium hydroxide with a NaOH content of 0.Type: GrantFiled: October 27, 1977Date of Patent: December 1, 1981Assignee: Degussa & Henkel Kommanditgesellschaft auf AktienInventors: Hans Strack, Wolfgang Roebke, Dieter Kneitel, Ehrfried Parr
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Patent number: 4242223Abstract: There is disclosed a process for receiving, storing and handling aluminum hydroxide wet hydrate, wherein the aluminum hydroxide wet hydrate is unloaded, optionally in batches, by means of a dumping means, e.g., a dump truck into a hopper which is equipped with a conveying means, e.g., a plate conveyor, the aluminum hydroxide wet hydrate supplied by means of a transporting apparatus, e.g., a double belt vertical conveyor, to a weighing means, e.g., a conveyor-type weigher and weighed, subsequently supplied to an aluminum hydroxide wet hydrate suspension tank, mixing the aluminum hydroxide wet hydrate in the tank with the amount of aqueous sodium hydroxide needed to produce a suspension of the aluminum hydroxide wet hydrate and producing a pumpable and meterable suspension of the aluminum hydroxide wet hydrate by heating to a temperature between 20.degree. and 100.degree. C. with the aid of a heating element and a stirrer.Type: GrantFiled: July 11, 1979Date of Patent: December 30, 1980Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals RoesslerInventors: Hans Christner, Wolfgang Roebke, Hermann Ramelow, Ewald Dittrich
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Patent number: 4222995Abstract: Alkali aluminum silicates, particularly a zeolitic molecular sieve powder with an average particle diameter of less than 10.mu. and having the portion of particles with a particle size above 45.mu. being less than 1 weight % are prepared by hydrothermal crystallization of an alkali aluminate-silicate mixture, separating the crystallization product from the mother liquor and drying with the proviso that the aqueous medium surrounding the crystallization product is adjusted to a pH value between 8.5 and 11 prior to the drying. The product is used as an ion exchanger, e.g., in dehardening water, particularly as a phosphate substitute in washing, rinsing and cleansing agents.Type: GrantFiled: March 15, 1976Date of Patent: September 16, 1980Assignees: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler, Henkel & CieInventors: Wolfgang Roebke, Dieter Kneitel, Erfried Parr
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Patent number: 4088593Abstract: There are provided alkali aluminum silicates having a hydrophilic surface. They are prepared by mixing a crystalline, ion-exchanging alkali aluminum silicate with a hydrophilic material, preferably ortho-phosphoric acid or an alkali ortho phosphate.Type: GrantFiled: March 30, 1977Date of Patent: May 9, 1978Assignees: Henkel Kommanditgesellschaft auf Aktien (Henkel KGaA), Deutsche Gold- und Silber-Scheideanstalt vormals RoesslerInventors: Wolfgang Roebke, Dieter Kneitel, Erfried Parr
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Patent number: 4073867Abstract: A crystalline zeolitic molecular sieve of Type A with the composition 1.0 .+-. 0.2 M.sub.2/n O : Al.sub.2 O.sub.3 : 1.85 .+-. 0.5 SiO.sub.2 . y H.sub.2 O where M is a metal cation, n its valence and y has a value up to 6 is prepared having particles with at least 99.5 weight % below 30.mu. diameter, as well as at least 90 weight % under 10.mu. and with 50 weight % below 6.5.mu. by hydrothermal crystallization of an alkali-aluminate silicate by pouring together an aqueous alkali silicate solution and a slightly concentrated aqueous alkali aluminate liquor, in a given case with simultaneous stirring in a receiver, allowing the synthesis premixture to solidify to a gel, adding to this gel a more highly concentrated aqueous alkali aluminate liquor at a temperature between 10.degree. and 100.degree. C. while stirring, allowing the thus obtained synthesis mixture to crystallize at a temperature between 20.degree. and 175.degree. C., preferably 100.degree. C.Type: GrantFiled: March 30, 1976Date of Patent: February 14, 1978Assignees: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler, Henkel u. Cie GmbHInventors: Wolfgang Roebke, Dieter Kneitel, Erfried Parr
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Patent number: 4040972Abstract: There are provided alkali aluminum silicates having a hydrophilic surface. They are prepared by mixing a crystalline, ion-exchanging alkali aluminum silicate with a hydrophilic material, preferably ortho-phosphoric acid or an alkali ortho phosphate.Type: GrantFiled: March 5, 1976Date of Patent: August 9, 1977Assignees: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler, Henkel & Cie GmbHInventors: Wolfgang Roebke, Dieter Kneitel, Erfried Parr