Patents Represented by Attorney Joel G. Ackerman

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  • Process for removing alkali metal aluminum silicate scale deposits from surfaces of chemical process equipment
    Patent number: 4713119
    Abstract: Alkali metal aluminum silicate scale deposits are removed from surfaces of chemical processing equipment by alternating treatments with acidic and basic solutions, with optional rinsing of the equipment between treatments.
    Type: Grant
    Filed: March 20, 1986
    Date of Patent: December 15, 1987
    Assignee: Stauffer Chemical Company
    Inventors: Jonathan P. Earhart, John A. Kostecki, Adrian C. McNutt
  • Organomagnesium solutions of low viscosity
    Patent number: 4707462
    Abstract: The viscosity of hydrocarbon solutions of dialkylmagnesium compounds is reduced by including as the viscosity reducing agent a nitrogen-containing compound which is a piperidine substituted with a hydrocarbyl group (preferably a C.sub.1 -C.sub.6 alkyl, C.sub.6 -C.sub.9 aryl or C.sub.5 -C.sub.6 cycloalkyl group) at the 2-position and optionally further substituted, triethylamine, cyclohexylamine, dicyclohexylamine, or N-N-dimethylformamide, or a mixture of two or more of these nitrogen-containing compounds. The viscosity reducing agent may be used as such or in the form of a substance produced by reacting such a nitrogen-containing compound with magnesium or with a dialkylmagnesium compound. The viscosity reducing agent may be used alone, or in a mixture with an organoaluminum viscosity reducing agent.
    Type: Grant
    Filed: April 24, 1986
    Date of Patent: November 17, 1987
    Assignee: Texas Alkyls, Inc.
    Inventors: Dennis B. Malpass, Loyd W. Fannin, Clark C. Crapo, Kelly B. Triplett
  • Method for preparation of mercaptobenzoates
    Patent number: 4704467
    Abstract: A method of preparing a compound of the formula ##STR1## wherein R is alkyl, R.sub.1 is alkyl or aryl and X is halogen or nitro comprising reacting ##STR2## wherein R and X are as defined above with a mercaptan having the formula R-SH in the presence of an inorganic base, a phase transfer catalyst and a non-polar aprotic solvent.
    Type: Grant
    Filed: December 12, 1986
    Date of Patent: November 3, 1987
    Assignee: Stauffer Chemical Company
    Inventor: Peter K. Wehrenberg
  • Process for the production of acylated 1,3-dicarbonyl compounds
    Patent number: 4695673
    Abstract: An acylated 1,3-dicarbonyl compound is produced by rearrangement of the corresponding enol ester in the presence of a cyanide source. In one embodiment the cyanide source is employed with a molar excess of a moderate base, with respect to the enol ester. In another embodiment, the cyanide source is a stoichiometric amount, with respect to the enol ester, of potassium or lithium cyanide and a catalytic amount of a crown ether is used.
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: September 22, 1987
    Assignee: Stauffer Chemical Company
    Inventors: James B. Heather, Pamela D. Milano
  • Method for preparation of mercaptobenzoates
    Patent number: 4692545
    Abstract: A method of preparing compounds of the formula ##STR1## wherein R is alkyl, alkenyl, benzyl or aromatic, R.sup.1 is alkyl and X is halogen or nitro comprising reacting a compound of the formula ##STR2## wherein R.sup.1 and X are defined as above with a mercaptan having the formula R--SH in the presence of an inorganic base and a polar aprotic solvent.
    Type: Grant
    Filed: December 12, 1986
    Date of Patent: September 8, 1987
    Assignee: Stauffer Chemical Company
    Inventor: Charles G. Carter
  • N-(ortho-substituted) benzyl, 3-trifluoromethylphenoxy nicotinamides as herbicides
    Patent number: 4692185
    Abstract: Compounds having the formula ##STR1## in which R is C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 haloalkyl or halogen, are herbicides.
    Type: Grant
    Filed: January 13, 1986
    Date of Patent: September 8, 1987
    Assignee: Stauffer Chemical Company
    Inventor: William J. Michaely
  • S-(oxoalkyl)trithiophosphonate insecticides
    Patent number: 4686210
    Abstract: Compounds having the formula ##STR1## in which R.sub.1 is methyl or ethyl; R.sub.2 is C.sub.1 -C.sub.6 alkyl; R.sub.3 is hydrogen or methyl; and R.sub.4 is C.sub.1 -C.sub.4 alkyl; R.sub.3 and R.sub.5 taken together form a trimethylene chain, are insecticides.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: August 11, 1987
    Assignee: Stauffer Chemical Company
    Inventor: Charles G. Chavdarian
  • O-(substituted) benzyl dithiophosphonate insecticides
    Patent number: 4683225
    Abstract: Compounds having the formula ##STR1## in which R.sub.1 is methyl or ethyl; R.sub.2 is C.sub.1 -C.sub.6 alkyl; R.sub.3 is halogen, C.sub.1 -C.sub.4 alkyl, trifluoromethyl, thio-(C.sub.1 -C.sub.4 alkyl) or phenoxy, and n is 0, 1 or 2; provided that if R.sub.2 is methyl, then R.sub.1 is methyl, are insecticides.
    Type: Grant
    Filed: October 28, 1985
    Date of Patent: July 28, 1987
    Assignee: Stauffer Chemical Company
    Inventor: Charles G. Chavdarian
  • Trithiophosphonate insecticides
    Patent number: 4678778
    Abstract: Compounds for insecticidal control, having the formula ##STR1## in which R.sub.1 is methyl or ethyl; R.sub.2 is C.sub.3 -C.sub.5 alkyl or bromo-C.sub.4 -alkyl and R.sub.3 is C.sub.1 -C.sub.4 bromoalkyl or 2,2,2-trifluoroethyl, together with insecticidal compositions containing such compounds, and methods for controlling insects.
    Type: Grant
    Filed: August 21, 1986
    Date of Patent: July 7, 1987
    Assignee: Stauffer Chemical Company
    Inventors: Alexandra B. Shortt, William G. Haag
  • Method for preparation of alkylsulfonyl alkylchlorobenzenes
    Patent number: 4675447
    Abstract: An improved process for the production of compounds having the formula ##STR1## in which R.sub.1 and R.sub.2 are lower alkyl by reacting a compound having the formula ##STR2## with sulfuryl chloride in the presence of a catalytic amount of a metal halide, the improvement in the process being reducing undesired impurities.
    Type: Grant
    Filed: March 21, 1986
    Date of Patent: June 23, 1987
    Assignee: Stauffer Chemical Company
    Inventor: Charles N. Ludvik
  • Method for recovery of alkylaluminum halides
    Patent number: 4670571
    Abstract: Dialkylaluminum chloride produced as a co-product in the reaction of a trialkylaluminum with zinc chloride or metallic zinc and an alkyl halide, to produce a dialkylzinc, is purified from contaminants containing zinc by contacting it with an alkylaluminum sesquihalide, followed by distillation.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: June 2, 1987
    Assignee: Texas Alkyls, Inc.
    Inventors: Dennis B. Malpass, Loyd W. Fannin
  • S-allyl trithiophosphonate insecticides
    Patent number: 4659703
    Abstract: Insecticides have the formula ##STR1## in which R.sub.1 methyl or ethyl and R.sub.2 is C.sub.3 -C.sub.5 alkyl.
    Type: Grant
    Filed: December 16, 1985
    Date of Patent: April 21, 1987
    Assignee: Stauffer Chemical Company
    Inventor: Charles G. Chavdarian
  • S-(substituted allylic) trithiophosphonate insecticides
    Patent number: 4659702
    Abstract: Compounds and compositions containing them, for insecticidal control, particularly for use as soil and/or foliar insecticides, have the formula ##STR1## in which R.sub.1 is C.sub.1 -C.sub.3 alkyl;R.sub.2 is C.sub.1 -C.sub.6 alkyl, or C.sub.5 -C.sub.6 cycloalkyl;R.sub.3 is hydrogen or C.sub.1 -C.sub.3 alkyl;R.sub.4 is hydrogen, C.sub.1 -C.sub.4 alkyl, phenyl, halogen, or halo-(C.sub.1 -C.sub.4 alkyl);R.sub.5 and R.sub.6 are independently hydrogen, halogen, C.sub.1 -C.sub.4 alkyl, phenyl, or C.sub.2 -C.sub.5 carboalkoxy; orR.sub.3 and R.sub.5 taken together form a trimethylene group; provided that if R.sub.3, R.sub.5 and R.sub.6 are all hydrogen, R.sub.4 is other than hydrogen.
    Type: Grant
    Filed: February 15, 1985
    Date of Patent: April 21, 1987
    Assignee: Stauffer Chemical Company
    Inventors: Charles G. Chavdarian, Valerie F. Heusinkveld
  • O-(substituted allylic) dithiophosphonate insecticides
    Patent number: 4656164
    Abstract: Compounds having the formula ##STR1## in which R.sub.1 is methyl or ethyl; R.sub.2 is C.sub.1 -C.sub.6 alkyl; R.sub.3 is hydrogen, halogen or methyl; and R.sub.4 is hydrogen, methyl or phenyl; or R.sub.3 and R.sub.4 taken together form a tetramethylene chain; provided that R.sub.3 and R.sub.4 are not both hydrogen, are insecticides and/or nematicides.
    Type: Grant
    Filed: August 8, 1985
    Date of Patent: April 7, 1987
    Assignee: Stauffer Chemical Company
    Inventor: Charles G. Chavdarian
  • Herbicidal phosphonomethyl amides
    Patent number: 4654072
    Abstract: Compounds having the formula ##STR1## in which R is hydrogen, cyano or --COOR.sub.2 ; R.sub.1 is hydrogen or C.sub.1 -C.sub.4 alkyl; R.sub.2 is hydrogen or C.sub.1 -C.sub.4 alkyl; and Z is ##STR2## in which A is halogen, B is halogen or hydrogen and Y is nitrogen or --CH--, are herbicides.
    Type: Grant
    Filed: September 17, 1985
    Date of Patent: March 31, 1987
    Assignee: Stauffer Chemical Company
    Inventor: Raymond A. Felix
  • S-propargyl trithiophosphonate insecticides
    Patent number: 4654430
    Abstract: Compounds having the formula ##STR1## in which R.sub.1 is methyl or ethyl and R.sub.2 is ethyl or a C.sub.3 -C.sub.5 branched alkyl group other than, 1,2-dimethylpropyl, are effective soil insecticides.
    Type: Grant
    Filed: May 27, 1986
    Date of Patent: March 31, 1987
    Assignee: Stauffer Chemical Company
    Inventor: Alexandra B. Shortt
  • Process for the preparation of N-arylhalopyrrolid-2-ones
    Patent number: 4645843
    Abstract: Production of N-arylhalopyrrolidones by intramolecular cyclization of an .alpha.-halogen-N-2-alkenylamide is conducted in the presence of a copper-containing catalyst and a primary or secondary aliphatic amine.
    Type: Grant
    Filed: February 25, 1985
    Date of Patent: February 24, 1987
    Assignee: Stauffer Chemical Company
    Inventors: Michael D. Broadhurst, Richard D. Gless, Jr.
  • S-phenylacetonyl trithiophosphonate insecticides
    Patent number: 4636495
    Abstract: Compounds having the formula ##STR1## in which R.sub.1 is methyl or ethyl; R.sub.2 is C.sub.1 -C.sub.6 alkyl; and R.sub.3 is phenyl or substituted phenyl, are insecticides.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: January 13, 1987
    Assignee: Stauffer Chemical Company
    Inventors: Charles G. Chavdarian, Alexandra B. Shortt
  • Biocidal agents for use in plastics, polymers and cellulosic materials
    Patent number: 4617328
    Abstract: Compounds having the formula ##STR1## in which Y is hydrogen, halogen, or C.sub.1 -C.sub.4 alkyl; R.sub.1 and R.sub.2 are independently hydrogen or methyl; and n is 1 or 2, are effective biocides or biostats for protection of plastic, polymeric or cellulosic materials against attack by microorganisms.
    Type: Grant
    Filed: November 1, 1985
    Date of Patent: October 14, 1986
    Assignee: Stauffer Chemical Company
    Inventor: Sophia Y. Liu
  • Treatment of hydrocarbon solutions of dialkylmagnesium compounds to reduce the content of soluble chloride-containing complexes
    Patent number: 4615843
    Abstract: Post-precipitation of solids from a hydrocarbon solution of an organomagnesium compound is prevented by addition of an appropriate amount of an alkyllithium compound.
    Type: Grant
    Filed: September 5, 1984
    Date of Patent: October 7, 1986
    Assignee: Texas Alkyls, Inc.
    Inventors: Loyd W. Fannin, Clark C. Crapo, Dennis L. Deavenport