Patents Represented by Attorney Donald L. Johnson
  • Patent number: 4719096
    Abstract: A highly efficient continuous process for the winning of bromine from a bromide-containing brine which increases overall bromine recovery efficiency, decreases chlorine requirements, decreases waste-brine neutralization, improves steam recovery, increases capacity and significantly reduces total amount of steam necessary for bromine recovery over prior art. This is accomplished by operating a two-stage subatmospheric apparatus comprising a steaming out tower and a secondary flash chamber. The steaming out or contact tower is operated near the vapor pressure of the feed brine so that only stripping steam is required to remove elemental bromine from the brine. The second stage or secondary flash chamber is operated at a lower pressure than the stage one steaming out tower and enables recovery of bromine, steam and chlorine from the waste bromide-depleted brin or tail brine which might otherwise to be lost.
    Type: Grant
    Filed: June 20, 1985
    Date of Patent: January 12, 1988
    Assignee: Ethyl Corporation
    Inventors: Kenneth C. Lesher, Herbert W. Henry
  • Patent number: 4717776
    Abstract: A process for partially brominating polyphenylene ether (e.g. diphenly ether) in the absence of a solvent by adding the polyphenylene ether to a stoichiometric excess of liquid bromine containing a zirconium halide catalyst.
    Type: Grant
    Filed: April 21, 1986
    Date of Patent: January 5, 1988
    Assignee: Ethyl Corporation
    Inventors: David R. Brackenridge, Bonnie G. McKinnie
  • Patent number: 4716251
    Abstract: Diaryloxyalkanes such as diphenoxyethane are brominated to give a product containing an average of about 5-7 bromine atoms per molecule by commingling a solution of the diaryloxyalkane in a haloalkane solvent with an excess of liquid bromine in the absence of a bromination catalyst.
    Type: Grant
    Filed: February 7, 1986
    Date of Patent: December 29, 1987
    Assignee: Ethyl Corporation
    Inventors: Gerald L. Scymanski, Amgad S. Mossaad, Saadat Hussain
  • Patent number: 4714691
    Abstract: A process using heterogeneous resin-bonded aluminum phenoxide catalyst to alkylate phenols, the catalyst per se, and a process for making the catalyst. The inventive alkylation process uses ortho-tert-butylphenoxide bonded to a phenolformaldehyde condensation resin heterogeneous catalyst to prepare 2,6-di-tert-butylphenol from isobutylene and ortho-tert-butylphenol.
    Type: Grant
    Filed: August 25, 1986
    Date of Patent: December 22, 1987
    Assignee: Ethyl Corporation
    Inventors: Dixie E. Goins, Silas W. Holmes, Edward A. Burt
  • Patent number: 4711965
    Abstract: Alkali metal aluminates, NaAlR'.sub.4, react with alkyl trihalosilanes, RSiX.sub.3, in accordance with the following equation:0.75 NaAlR'.sub.4 +RSiX.sub.3 .fwdarw.RSiR'.sub.3 +0.75 NaAlX.sub.4 (1)The process is conducted at elevated temperature. Products of the process are useful as functional fluids.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: December 8, 1987
    Assignee: Ethyl Corporation
    Inventor: Gunner E. Nelson
  • Patent number: 4711966
    Abstract: Mixtures of silahydrocarbons which comprise a product RSiR'.sub.3, wherein R is an alkyl of 1-4 carbons, and R' is an alkyl of 8-14 carbons are produced by reacting a silicon tetrahalide, SiX.sub.4, a trialkylaluminum, R.sub.3 Al, and an alkali metal aluminate NaAlR'.sub.4. An alkali metal salt increases the relative amount of RSiR'.sub.3 in the product. The trialkylaluminum can be replaced with an olefin or with an organoaluminum sesquihalide.The products are useful as functional fluids.
    Type: Grant
    Filed: March 19, 1987
    Date of Patent: December 8, 1987
    Assignee: Ethyl Corporation
    Inventor: Gunner E. Nelson
  • Patent number: 4710306
    Abstract: A process for decolorizing iron-caused yellow color in brine solutions comprising adding a small amount of a soluble metal salt such as alugenite to the brine solution, neutralizing the solution and then filtering the solution to obtain a solution of a desired degree of clarity.
    Type: Grant
    Filed: January 22, 1985
    Date of Patent: December 1, 1987
    Assignee: Ethyl Corporation
    Inventor: Warren B. Kirsch
  • Patent number: 4710273
    Abstract: Olefin mixtures containing vinyl, vinylidene and internal olefins are upgraded in value by removing the vinylidene olefin content and lowering the internal olefin content by selective reaction with a sulfur halide such as S.sub.2 Cl.sub.2 followed by reaction with aqueous alkali metal hydrosulfide and optionally alkali metal sulfide. The reaction mixture is distilled to remove mainly vinyl and a reduced amount of internal olefins. The distillation residue is an effective extreme pressure additive for lubricating oil.
    Type: Grant
    Filed: August 8, 1985
    Date of Patent: December 1, 1987
    Assignee: Ethyl Corporation
    Inventor: Ted T. Okamoto
  • Patent number: 4710581
    Abstract: Halonitroarylacetic acid esters are prepared by reacting a halonitroaromatic compound with an alpha,alpha-disubstituted acetic acid ester in an inert solvent and in the presence of a base. The halonitroarylacetic acid esters formed by the process can be readily converted into derivatives, such as pharmaceuticals.
    Type: Grant
    Filed: October 3, 1985
    Date of Patent: December 1, 1987
    Assignee: Ethyl Corporation
    Inventors: G. Patrick Stahly, Barbara C. Stahly
  • Patent number: 4710549
    Abstract: Low molecular weight organophosphazene oligomers, especially cyclic oligomers, can be cross-linked by siloxane bridges to form solid high molecular weight polymers.
    Type: Grant
    Filed: July 14, 1986
    Date of Patent: December 1, 1987
    Assignee: Ethyl Corporation
    Inventor: F. Alexander Pettigrew
  • Patent number: 4706755
    Abstract: A polymer of monoallylamine, preferably a water-soluble polymer of monoallylamine, whether in free (i.e., unneutralized) form or in salt (i.e., partially or completely neutralized) form is used in conjunction with a sulfonated polymer such as a water-soluble lignosulfonate, condensed naphthalene sulfonate, or sulfonated vinyl aromatic polymer, to minimize fluid loss from the slurry during subterranean well cementing operations. The polymer of monoallyl amine may be a homopolymer or a copolymer, and may be crosslinked or uncrosslinked. These components interact with each other in the presence of water to produce a gelatinous material that tends to plug porous zones and minimize premature water loss from the well cement slurry when present in the subterranean well formation. In addition, the gelatinous material so formed prevents de-stabilization of the slurry in the well formation.
    Type: Grant
    Filed: April 1, 1987
    Date of Patent: November 17, 1987
    Assignee: Ethyl Corporation
    Inventors: David N. Roark, Adam Nugent, Jr., Baldev K. Bandlish
  • Patent number: 4704377
    Abstract: Described are novel bimetallic complexes particularly useful as homogeneous catalysts for the metathesis of alkynes and metathesizable functionally substituted alkynes, and methods for the preparation of such complexes. The complexes are formed from (i) a Group VI-B metal compound having (a) quadruple metal to metal bonds between a pair of Group VI-B metal atoms at least one of which has an atomic number above 24, and (b) four monovalent anions with a k.sub.A greater than 10.sup.-14, and (ii) a Group III-A phenoxide, a Group III-A alkoxide or a Group IV-B metal alkoxide. Displacement of two of the anions appears to occur during formation of the complex. Usually the complexes can be produced very easily and quickly. All that is required is to establish intimate contact between components (i) and (ii), preferably in an innocuous liquid organic solvent. Addition of a small amount of a nitrile gives a faster and cleaner reaction. In some cases use of slightly elevated temperatures is desirable.
    Type: Grant
    Filed: May 19, 1986
    Date of Patent: November 3, 1987
    Assignee: Ethyl Corporation
    Inventor: Steven P. Diefenbach
  • Patent number: 4701568
    Abstract: Tetrabromobisphenol-A is made in high purity by contacting a solution of bisphenol-A dissolved in a C.sub.1 -C.sub.4 alkanol with gaseous bromine.
    Type: Grant
    Filed: June 30, 1986
    Date of Patent: October 20, 1987
    Assignee: Ethyl Corporation
    Inventors: Bonnie G. McKinnie, Olan W. Mitchell
  • Patent number: 4698451
    Abstract: Described are novel bimetallic complexes particularly useful as homogeneous catalysts for the metathesis of alkynes, and methods for the preparation of such complexes. The complexes are formed from (i) a dirhenium halide having (a) a double or triple bond between a pair of rhenium atoms, and (b) a bis(dihydrocarbylphosphino)alkane coordinated therewith, and (ii) a Group III-A alkoxide in which the alkoxy groups are perfluorinated or are substantially perfluorinated. The complexes can be produced very easily and quickly. All that is required is to establish intimate contact between components (i) and (ii), preferably in an innocuous liquid organic solvent. 3-Heptyne was metathesized in good yields by means of the complex formed from Re.sub.2 Cl.sub.4 (dppm).sub.2 and Al(OCH(CH.sub.3).sub.2).sub.3, and the complex formed from Re.sub.2 Cl.sub.6 (dppm).sub.2 and Al(OCH(CF.sub.3).sub.2).sub.3 (dppm=bis(diphenylphosphino))methane).
    Type: Grant
    Filed: June 17, 1986
    Date of Patent: October 6, 1987
    Assignee: Ethyl Corporation
    Inventor: Steven P. Diefenbach
  • Patent number: 4698380
    Abstract: A polymer of monoallylamine, preferably a water-soluble polymer of monoallylamine, whether in free (i.e., unneutralized) form or in salt (i.e., partially or completely neutralized) form is used in conjunction with a sulfonated polymer such as a water-soluble lignosulfonate, condensed naphthalene sulfonate, or sulfonated vinyl aromatic polymer, to minimize fluid loss from the slurry during subterranean well cementing operations. The polymer of monoallyl amine may be a homopolymer or a copolymer, and may be crosslinked or uncrosslinked. These components interact with each other in the presence of water to produce a gelatinous material that tends to plug porous zones and minimize premature water loss from the well cement slurry when present in the subterranean well formation. In addition, the gelatinous material so formed prevents de-stabilization of the slurry in the well formation.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: October 6, 1987
    Assignee: Ethyl Corporation
    Inventors: David N. Roark, Adam Nugent, Jr., Baldev K. Bandlish
  • Patent number: 4698439
    Abstract: A polyphosphazene hydraulic fluid that remains solids-free on storage at temperatures down to -30.degree. C. over an extended period can be made by reacting a solution of sodium phenoxide, sodium m-methylphenoxide, sodium p-methylphenoxide and sodium trifluoroethoxide with a small stoichiometric excess of cyclic phosphonitrilic chloride oligomer, mainly trimer, and then reacting the remaining replaceable chlorine atoms with a solution of sodium trifluoroethoxide.
    Type: Grant
    Filed: May 12, 1986
    Date of Patent: October 6, 1987
    Assignee: Ethyl Corporation
    Inventors: Charles H. Kolich, W. Dirk Klobucar
  • Patent number: 4692555
    Abstract: A process for the production of diphenolic compounds having a divalent bridge. A first disubstituted phenol is reacted with an aldehyde in the presence of a secondary amine and excess alcohol to form an ether intermediate. The ether intermediate is reacted with a phenol having an open ortho or para position to form a diphenolic.
    Type: Grant
    Filed: April 9, 1984
    Date of Patent: September 8, 1987
    Assignee: Ethyl Corporation
    Inventor: Kju H. Shin
  • Patent number: 4691866
    Abstract: A gun-target apparatus and method for producing silicon seed particles from silicon feed particles comprising accelerating silicon feed particles from a container and propelling them into a silicon target in a target chamber. The target is movable within said chamber so that a different portion of the silicon target is exposed to the oncoming seeds. The seeds are accumulated in a receiver and separated from silicon dust and larger feed particles.
    Type: Grant
    Filed: November 8, 1985
    Date of Patent: September 8, 1987
    Assignee: Ethyl Corporation
    Inventor: Thomas J. Belk
  • Patent number: 4691057
    Abstract: The reaction of alkali metal with aromatic hydroxy compounds is promoted by inclusion of an alcohol in the reaction mixture. The alkali metal aryloxide formed can be reacted with phosphonitrilic chloride polymers to make polyaryloxyphosphazenes.
    Type: Grant
    Filed: September 19, 1984
    Date of Patent: September 1, 1987
    Assignee: Ethyl Corporation
    Inventor: Allan A. Eisenbraun
  • Patent number: 4691033
    Abstract: 3-Phenoxybenzaldehyde acetals can be prepared by reacting a 3-bromobenzalkehyde acetal with an alkali metal phenolate at a temperature of about 130.degree.-165.degree. C. in the presence of a copper catalyst and a phenol as the sole solvent. The product acetals can be converted to the corresponding 3-phenoxybenzaldehydes by hydrolysis.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: September 1, 1987
    Assignee: Hardwicke Chemical Company
    Inventor: James E. Hardwicke, III