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).

  • Patent number: 5294424
    Abstract: 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: Grant
    Filed: June 20, 1990
    Date of Patent: March 15, 1994
    Assignee: Monsanto Company
    Inventors: Louis A. Highfill, Kent P. Lannert
  • Patent number: 4948516
    Abstract: 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: Grant
    Filed: August 21, 1989
    Date of Patent: August 14, 1990
    Assignee: Monsanto Company
    Inventors: David O. Fisher, Kent P. Lannert
  • Patent number: 4731465
    Abstract: 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: Grant
    Filed: March 7, 1984
    Date of Patent: March 15, 1988
    Assignee: Monsanto Company
    Inventors: Chung Y. Shen, Kent P. Lannert
  • Patent number: 4704465
    Abstract: 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: Grant
    Filed: November 22, 1985
    Date of Patent: November 3, 1987
    Assignee: Monsanto Company
    Inventors: Kent P. Lannert, Sum-Muk Lee
  • Patent number: 4485049
    Abstract: 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: Grant
    Filed: January 3, 1983
    Date of Patent: November 27, 1984
    Assignee: Monsanto Company
    Inventors: Kent P. Lannert, Chung Y. Shen, Dat S. Trieu
  • Patent number: 4228300
    Abstract: 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: Grant
    Filed: May 15, 1972
    Date of Patent: October 14, 1980
    Assignee: Monsanto Company
    Inventor: Kent P. Lannert
  • Patent number: 4223162
    Abstract: 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: Grant
    Filed: September 26, 1978
    Date of Patent: September 16, 1980
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Kent P. Lannert, Charles J. Upton
  • Patent number: 4182905
    Abstract: 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: Grant
    Filed: September 2, 1977
    Date of Patent: January 8, 1980
    Assignee: Monsanto Company
    Inventor: Kent P. Lannert
  • Patent number: 4182684
    Abstract: 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 sufficie
    Type: Grant
    Filed: November 17, 1978
    Date of Patent: January 8, 1980
    Assignee: Monsanto Company
    Inventor: Kent P. Lannert
  • Patent number: 4182908
    Abstract: 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: Grant
    Filed: August 15, 1977
    Date of Patent: January 8, 1980
    Assignee: Monsanto Company
    Inventor: Kent P. Lannert
  • Patent number: 4172954
    Abstract: 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: Grant
    Filed: September 2, 1977
    Date of Patent: October 30, 1979
    Assignee: Monsanto Company
    Inventor: Kent P. Lannert
  • Patent number: 4172208
    Abstract: 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: Grant
    Filed: July 27, 1978
    Date of Patent: October 23, 1979
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Kent P. Lannert
  • Patent number: 4156687
    Abstract: 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: Grant
    Filed: July 27, 1978
    Date of Patent: May 29, 1979
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Kent P. Lannert
  • Patent number: 4147702
    Abstract: 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: Grant
    Filed: July 27, 1978
    Date of Patent: April 3, 1979
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Kent P. Lannert
  • Patent number: 4125485
    Abstract: 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: Grant
    Filed: September 2, 1977
    Date of Patent: November 14, 1978
    Assignee: Monsanto Company
    Inventor: Kent P. Lannert
  • Patent number: 4124519
    Abstract: 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: Grant
    Filed: August 15, 1977
    Date of Patent: November 7, 1978
    Assignee: Monsanto Company
    Inventor: Kent P. Lannert
  • Patent number: 4120874
    Abstract: 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: Grant
    Filed: January 5, 1977
    Date of Patent: October 17, 1978
    Assignee: Monsanto Company
    Inventors: Marvin M. Crutchfield, Kent P. Lannert
  • Patent number: 4118420
    Abstract: 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: Grant
    Filed: March 25, 1976
    Date of Patent: October 3, 1978
    Assignee: Monsanto Company
    Inventor: Kent P. Lannert
  • Patent number: 4100358
    Abstract: 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: Grant
    Filed: October 29, 1976
    Date of Patent: July 11, 1978
    Assignee: Monsanto Company
    Inventor: Kent P. Lannert
  • Patent number: 4013714
    Abstract: 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: Grant
    Filed: December 19, 1973
    Date of Patent: March 22, 1977
    Assignee: Monsanto Company
    Inventor: Kent P. Lannert