Ethyl Corporation

Albemarle Corporation

Phillip R Beaver

Ronald L Shubkin

Eric W Liimatta

James E Boone

Dixie E Goins

David L Shelton

Thomas E Henke

Bonnie G McKinnie

Meng-Sheng Ao

Billie B Dadgar

William B Harrod

Cecil P Loechelt

Donald O Hutchinson

Alireza M Dadgar

Peter M DiGiacinto

James R Meyer

Julio J Vega

Mark W Beltz

Charles R Bergen

Clifford S Durand, Iii

A cleaning process suitable for both mild and aggressive applications employs non-flammable, non-corrosive and environmentally friendly, fluorinated hydrobromocarbon solvent based cleaning compositions.

Fluorinated hydrobromocarbon solvent cleaning process and composition

A process for cleaning movie film, and especially cellulose acetate based polymer film, without causing film damage, comprises immersing the film into a cleaning solvent composition which comprises one or more halogenated hydrobromocarbons having from 1 to 3 carbons, from 1 to 3 bromine atoms and at least one chlorine or fluorine atom, such as 3-bromo-1,1,1-trifluoropropane, removing the film from the solvent and drying the film.

Movie film cleaning process using halogenated hydrobromocarbon solvents

In an aqueous reaction medium, phenol is brominated with bromine under conditions forming an aqueous hydrobromic acid phase and an organic phase consisting essentially of molten 2,4,6-tribromophenol. The aqueous hydrobromic acid phase and the molten 2,4,6-tribromophenol are separated from each other, and optionally the molten 2,4,6-tribromophenol is washed with an aqueous decolorizing solution. An alkali metal base and water are mixed with the 2,4,6-tribromophenol to form an alkali metal salt of tribromophenol. Then, in a mixture consisting essentially of water and at least one liquid ketone, cyanuric chloride is reacted with at least a portion of the alkali metal 2,4,6-tribromophenolate of such that tris(2,4,6-tribromophenoxy)-s-1,3,5-triazine is produced.

Production of tris(2,4,6-tribromophenoxy)-s-1,3,5-triazine

1-Bromopropane is produced from hydrogen bromide, propene and a catalytically effective amount of an ozonide catalyst and/or one or more active catalytic species formed in situ therefrom. In addition to being highly efficient and highly suitable for use on an industrial scale, the process has the additional advantages of being environmentally friendly, operationally safe, and conservationally beneficial.

Production of 1-bromopropane

A continuous process for the extraction of halogenated hydrocarbons from a dilute, halogenated hydrocarbon-containing aqueous fluid, in high efficiency, while dramatically reducing the stripping medium requirement for the extraction and without substantially increasing the amount of halogenated hydrocarbons discharged to the atmosphere.

Groundwater treatment process

This invention relates to a process and apparatus for repairing a port of a vessel, the port having an inside surface which is damaged. The method and apparatus utilize a liner means for lining the inner surface of the port, a sealed chamber between the lining means and the inner surface of the vessel port, a means of using a gas, preferably an inert gas, to purge the sealed chamber, and a means of monitoring the gas which is purged from the chamber.

Method and apparatus for repairing vessel ports

Improved method by control of excess bromine in reaction between bromine and cyclododecatriene to form hexabromocyclododecane provides increased product yield. A novel reaction mass is obtained and maintained.

Production of hexabromocyclododecane

This invention relates to a process for reducing metal halates to metal halides, the process comprising reacting a metal halate with a reducing agent in an aqueous alkaline reaction medium having a pH above about 7, wherein the amount of reducing agent is sufficient to reduce substantially all of the metal halate to metal halide.

Reduction of metal halates and recovery of metal halides

This invention relates to a method and an apparatus for sealing a port of a vessel, which apparatus comprises: (a) a seal for forming a gas-tight seal with the port to close off the port, (b) a chamber; and (c) a chamber sweeping gas for sweeping the chamber.

Method and apparatus for repairing vessels

Composition of solvents usable for the production of hexabromocyclododecane and methods of use of such compositions are disclosed. The compositions comprise C.sub.5 -C.sub.8 saturated aliphatic alcohols having low mutual solubility with water.

Alcohol reaction media for production of hexabromocyclododecane

A method for producing high melting hexabromocyclododecane product by selective recovery of preferred isomers.

Method of elevating the melting point of a hexabromocyclododecane product

Methods for purifying and agglomerating hexabromocyclododecane particles by heating an admixture formed with wetcake and water.

Recovery of hexabromocyclododecane particles

This invention relates to an apparatus and process for detecting gas permeability in a main rupture disc which is in gaseous communication with a vessel. The process comprises: fitting a chamber over and in gas-tight association with the outside surface of the main rupture disc; selecting a burst presure for the main rupture disc and a set pressure; obtaining a gaseous pressure within the chamber which is greater than the normal operating pressure within the vessel, and equal to the difference between the set pressure and the burst pressure of the main rupture disc; and monitoring the chamber pressure for a decrease thereof. The apparatus comprises, generally, a chamber, a means for obtaining a gaseous pressure within the chamber, and a means for monitoring a change in pressure in the chamber.

Rupture disc monitor

It is disclosed that aqueous systems containing the sodium salt of nitrilotriacetate monohydrate (NTA) can be converted into a dry particulate form of NTA of comparatively high bulk density and suitable hygroscopic properties when using a spray drying technique by delivering to the spray dryer an NTA-water mixture which contains a greater amount of NTA than that present in a saturated aqueous solution of NTA. Upon spray drying such a particulate mixture with hot gases in a counter-current or co-current flow under proper conditions, water is removed from the particulate mixture producing a particulate solid NTA product.

Growing community of inventors

Baton Rouge, LA, United States of America

Phillip R Beaver