Abstract: This invention relates to compositions containing improved granulated hexabromocyclododecane flame retardant products, flame retardant formulations containing products, and to a process for forming the improved granulated flame retardant products, wherein the granulated product is characterized as having a friability loss of less than about 8 percent.

Abstract: This invention relates to an improvement in a process for preparing tetrabromophthalic anhydride whereby there is a substantial recovery of reactants such as halogen and SO.sub.3 from a vent stream exiting the reaction vessel. The improvement comprises contacting the vent stream with a fluid having a first oleum concentration and recovering a halogen stream and a second stream, having a second oleum concentration wherein the second oleum concentration is greater than the first oleum concentration.

Abstract: Alkylaluminoxanes are made by conducting a solution of an alkylaluminum (e.g. trimethyl aluminum) in an inert solvent to the top of an upright hollow column and allowing the solution to flow as a thin film down the inner surface of the column while passing a wet inert gas (e.g. nitrogen) up through the column such that the wet inert gas contacts the thin falling film of alkyl aluminum solution forming alkylaluminoxane.

Abstract: Alkylaluminoxanes are made in a continuous process by feeding an inert solvent solution of an alkyl aluminum compound and a water/inert solvent emulsion to a first reaction vessel maintained at about -20.degree. to 30.degree. C. and transferring reaction mixture to a second reaction zone at a rate which maintains a constant liquid level in the first reaction vessel and results in an average residence time of about 1-60 minutes.

Abstract: Hydrocarbylaluminoxanes, especially methylaluminoxane, having high catalytic activity in the polymerization of olefins are made in high yield and low gel content by impinging (1) a solution of a hydrocarbyl aluminum, e.g. trimethyl aluminum, in an inert solvent, e.g. toleune, with (2) a water dispersion in an inert solvent (e.g. toluene) in a T-shaped reactor such that the hydrocarbyl aluminum and water immediately react to form an aluminoxane solution which is promptly removed from the T-shaped reactor through its third arm. The water dispersion is formed by passing a solvent/water mixture through a static mixer which comprises a plurality of deflection vanes forming a tortuous path through the static mixer causing extremely turbulent flow.