Patents by Inventor Kent P. Lannert
Kent P. Lannert 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: 5294424Abstract: A process for preparing high absorptivity granular sodium phosphate mixtures made of sodium tripolyphosphate, pyrophosphates, metaphosphates and orthophosphates by hydrating and dehydrating a mixture comprising sodium tripolyphosphate in major proportion, and recovering the high absorptivity granular sodium phosphate mixture.Type: GrantFiled: June 20, 1990Date of Patent: March 15, 1994Assignee: Monsanto CompanyInventors: Louis A. Highfill, Kent P. Lannert
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Patent number: 4948516Abstract: A method of disposing of wastes containing heavy metal compounds by neutralizing the wastes, oxidizing the neutralized wastes, then solidifying the oxidized wastes using conventional mineral binding agents such as Portland cement. This method is of particular interest in treating arsenic sulfide containing aqueous sludges produced in the manufacture of phosphoric acid.Type: GrantFiled: August 21, 1989Date of Patent: August 14, 1990Assignee: Monsanto CompanyInventors: David O. Fisher, Kent P. Lannert
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Patent number: 4731465Abstract: A continuous process for preparing nitrilotriacetonitrile in which the reactants, formaldehyde, hydrogen cyanide, and either ammonia or hexamethylenetetramine are reacted first in a mixing reactor, preferably a circulating loop reactor at from about 90.degree. C. to about 120.degree. C., then reacted in a plug flow tubular reactor at from about 95.degree. C. to about 120.degree. C., then after cooling the reaction mixture crystalline nitrilotriacetonitrile is recovered.Type: GrantFiled: March 7, 1984Date of Patent: March 15, 1988Assignee: Monsanto CompanyInventors: Chung Y. Shen, Kent P. Lannert
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Patent number: 4704465Abstract: A process for preparing an ethylenediamine intermediate for the production of an ethylenediaminetetraacetonitrile. Formaldehyde is combined with ethylenediamine at a mole ratio of 1 to 2 respectively wherein the molar ratio of ethylenediamine to formaldehyde in the reaction mixture at least 0.48 or greater.Type: GrantFiled: November 22, 1985Date of Patent: November 3, 1987Assignee: Monsanto CompanyInventors: Kent P. Lannert, Sum-Muk Lee
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Patent number: 4485049Abstract: A process is disclosed for producing crystalline nitrilotriacetonitrile from a solution of nitrilotriacetonitrile and water in excess of 95.degree. C., comprising:a. cooling the nitrilotriacetonitrile-water solution in a first stage to the range of about 70.degree. C. to about 90.degree. C., preferably from about 80.degree. C. to about 90.degree. C., and more preferably about 85.degree. C., to produce a nitrilotriacetonitrile water slurry; andb. further cooling the nitrilotriacetonitrile-water slurry in a second stage to below about 35.degree. C., carried out either continuously or in a batch process. Cooling in the first stage is preferably accomplished by recycling cooled nitrilotriacetonitrile-water slurry from the second stage. Cooling in the second stage is preferably accomplished by vacuum cooling.Type: GrantFiled: January 3, 1983Date of Patent: November 27, 1984Assignee: Monsanto CompanyInventors: Kent P. Lannert, Chung Y. Shen, Dat S. Trieu
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Patent number: 4228300Abstract: Compounds having the formula ##STR1## wherein M is an alkali metal or ammonium, R.sub.1 and R.sub.2 are hydrogen, methyl or ethyl and R.sub.3 is hydrogen, methyl, ethyl or COOM are useful sequestrants and detergency builders. Lower alkyl esters and acids of such compounds are useful intermediates for their production.Type: GrantFiled: May 15, 1972Date of Patent: October 14, 1980Assignee: Monsanto CompanyInventor: Kent P. Lannert
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Patent number: 4223162Abstract: Ether carboxylates represented by the formula: ##STR1## wherein R.sup.1 and R.sup.2 are individually selected from the group consisting of alkyl containing up to 20 carbon atoms, and M.sup.1, M.sup.2 and M.sup.3 are individually selected from the group consisting of alkyl containing up to about 4 carbon atoms, are useful as intermediates to prepare the corresponding acid or alkali metal, ammonium and alkanol amine salts, which are useful as chelants, sequestrants and detergent builders.Type: GrantFiled: September 26, 1978Date of Patent: September 16, 1980Assignee: Monsanto CompanyInventors: Marvin M. Crutchfield, Kent P. Lannert, Charles J. Upton
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Patent number: 4182905Abstract: Organic compounds having a substituent represented by the formula ##STR1## wherein M is alkali metal or ammonium are useful complexing agents for metal and/or alkaline earth metal ions.Type: GrantFiled: September 2, 1977Date of Patent: January 8, 1980Assignee: Monsanto CompanyInventor: Kent P. Lannert
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Patent number: 4182684Abstract: A machine dishwashing composition is provided which comprises the following: (a) from 5 to 90 percent by weight of a compound corresponding to the formula ##STR1## wherein M is alkali metal or ammonium and wherein n is a number from 1 through 3, and wherein R is selected from an alkyl radical having from 1 to 20 carbon atoms, an alkenyl radical having from 1 to 20 carbon atoms, an alkynyl radical having from 1 to 20 carbon atoms, a cycloalkane radical having from 3 to 20 carbon atoms, an alkanol radical having from 2 to 20 carbon atoms, an ether radical having at least 3 carbon atoms, an aryl radical having at least 6 carbon atoms, a substituted aryl radical having at least 6 carbon atoms wherein the substituents are halogen, nitro, amide or carboxyalkyl substituents, aralkyl radicals having at least 7 carbon atoms and arylether radicals having at least 7 carbon atoms, and (b) from 0 to 5 percent by weight of a low-foaming anionic or nonionic surfactant, (c) a chlorine-providing material in an amount sufficieType: GrantFiled: November 17, 1978Date of Patent: January 8, 1980Assignee: Monsanto CompanyInventor: Kent P. Lannert
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Patent number: 4182908Abstract: This disclosure concerns:(a) Compounds having the molecular structure represented by the formula: ##STR1## wherein M is selected from the group consisting of --H, --CH.sub.3, --C.sub.2 H.sub.5, --NH.sub.4, --Na, --K and combinations thereof; R is selected from the group consisting of an alkyl radical (branched or straight chain) containing up to about C.sub.20, --CH(CO.sub.2 M).sub.2, and --CH.sub.2 CO.sub.2 M, and R' is selected from the group consisting of an alkyl radical (branched or straight chain) containing up to about C.sub.20, --H, and --OR;(b) a method for making the compounds of (a);(c) solid and liquid detergent compositions comprising compounds of (a), and(d) washing processes employing the compounds of (a) and/or the compositions of (c).Type: GrantFiled: August 15, 1977Date of Patent: January 8, 1980Assignee: Monsanto CompanyInventor: Kent P. Lannert
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Patent number: 4172954Abstract: Organic compounds having a substituent represented by the formula ##STR1## wherein M is alkali metal or ammonium are useful complexing agents for metal and/or alkaline earth metal ions.Type: GrantFiled: September 2, 1977Date of Patent: October 30, 1979Assignee: Monsanto CompanyInventor: Kent P. Lannert
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Patent number: 4172208Abstract: The compound of the formula: ##STR1## is useful as an intermediate to prepare a compound having the generic formula ##STR2## wherein X is selected from groups to provide tetrahydropyran type compounds, 1,4 dioxane type compounds or tetrahydrofuran type compounds, and R is selected from the group consisting of alkali metal, NH.sub.4.sup.+, NH(CH.sub.2 CH.sub.2 OH).sub.3.sup.+, and lower alkyl, branched or straight chain, with up to about C.sub.20 in the chain, useful as a detergent builder.Type: GrantFiled: July 27, 1978Date of Patent: October 23, 1979Assignee: Monsanto CompanyInventors: Marvin M. Crutchfield, Kent P. Lannert
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Patent number: 4156687Abstract: A compound of the formula ##STR1## wherein R' is lower alkyl is useful as an intermediate to prepare a compound of the formula ##STR2## wherein X is selected from the group consisting of: ##STR3## wherein R is selected from the group consisting of alkali metal, NH.sub.4.sup.+, NH(CH.sub.2 CH.sub.2 OH).sub.3.sup.+, and lower alkyl, branched or straight chain, with up to about C.sub.20 in the chain. The esters can be converted to salts useful as detergent builders.Type: GrantFiled: July 27, 1978Date of Patent: May 29, 1979Assignee: Monsanto CompanyInventors: Marvin M. Crutchfield, Kent P. Lannert
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Patent number: 4147702Abstract: A compound of the formula ##STR1## wherein R' is lower alkyl is useful as an intermediate to prepare a compound of the formula ##STR2## wherein X is selected from the group consisting of: ##STR3## wherein R is selected from the group consisting of alkali metal, NH.sub.4.sup.+, NH(CH.sub.2 CH.sub.2 OH).sub.3.sup.+, and lower alkyl, branched or straight chain, with up to about C.sub.20 in the chain. The ester can be converted to the corresponding salt, useful as a detergent builder.Type: GrantFiled: July 27, 1978Date of Patent: April 3, 1979Assignee: Monsanto CompanyInventors: Marvin M. Crutchfield, Kent P. Lannert
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Patent number: 4125485Abstract: Organic compounds having a substituent represented by the formula ##STR1## wherein M is alkali metal or ammonium are useful complexing agents for metal and/or alkaline earth metal ions.Type: GrantFiled: September 2, 1977Date of Patent: November 14, 1978Assignee: Monsanto CompanyInventor: Kent P. Lannert
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Detergent compositions containing ketal polycarboxylate builder salts and methods employing the same
Patent number: 4124519Abstract: This disclosure concerns:(a) Compounds having the molecular structure represented by the formula: ##STR1## wherein M is selected from the group consisting of --H, --CH.sub.3, --C.sub.2 H.sub.5, --NH.sub.4, --Na, --K and combinations thereof; R is selected from the group consisting of an alkyl radical (branched or straight chain) containing up to about C.sub.20, --CH(CO.sub.2 M).sub.2, and --CH.sub.2 CO.sub.2 M, and R' is selected from the group consisting of an alkyl radical (branched or straight chain) containing up to about C.sub.20, --H, and --OR;(b) a method for making the compounds of (a);(c) solid and liquid detergent compositions comprising compounds of (a), and(d) washing processes employing the compounds of (a) and/or the compositions of (c).Type: GrantFiled: August 15, 1977Date of Patent: November 7, 1978Assignee: Monsanto CompanyInventor: Kent P. Lannert -
Patent number: 4120874Abstract: A compound of the formula ##STR1## wherein R' is lower alkyl, is useful as an intermediate in the preparation of a corresponding tricarboxylate, which is a useful detergent builder.Type: GrantFiled: January 5, 1977Date of Patent: October 17, 1978Assignee: Monsanto CompanyInventors: Marvin M. Crutchfield, Kent P. Lannert
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Patent number: 4118420Abstract: Organic compounds having a substituent represented by the formula ##STR1## wherein M is alkali metal or ammonium are useful complexing agents for metal and/or alkaline earth metal ions.Type: GrantFiled: March 25, 1976Date of Patent: October 3, 1978Assignee: Monsanto CompanyInventor: Kent P. Lannert
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Patent number: 4100358Abstract: This disclosure concerns:(a) Compounds having the molecular structure represented by the formula: ##STR1## wherein M is selected from the group consisting of --H, --CH.sub.3, --C.sub.2 H.sub.5, --NH.sub.4, --Na, --K and combinations thereof; R is selected from the group consisting of an alkyl radical (branched or straight chain) containing up to about C.sub.20, --CH(CO.sub.2 M).sub.2, and --CH.sub.2 CO.sub.2 M, and R' is selected from the group consisting of an alkyl radical (branched or straight chain) containing up to about C.sub.20, --H, and --OR;(b) a method for making the compounds of (a);(c) solid and liquid detergent compositions comprising compounds of (a), and(d) washing processes employing the compounds of (a) and/or the compositions of (c).Type: GrantFiled: October 29, 1976Date of Patent: July 11, 1978Assignee: Monsanto CompanyInventor: Kent P. Lannert
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Patent number: 4013714Abstract: Compounds represented by the formula ##EQU1## wherein Rx is ##EQU2## AND A is hydrogen, methyl, ethyl, CH.sub.2 OH or RxOH; M being alkali metal, ammonium, alkyl ammonium, or alkanol ammonium and Rz being hydrogen, alkyl, phenyl, phenyl alkyl, alkoxy alkyl, alkoxy phenyl or alkoxy phenyl alkyl are useful as complexing agents and/or detergency builders. The ester and acid forms of these compounds are useful as intermediates for their preparation.Type: GrantFiled: December 19, 1973Date of Patent: March 22, 1977Assignee: Monsanto CompanyInventor: Kent P. Lannert