Abstract: Mixed-metal chelates represented by the following general formula CaM(III)EDTA(OH).xH2O wherein M is a trivalent transition metal and x is 0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, or 8 and a process for their preparation are disclosed. The process comprises the steps of a) reacting calcium hydroxide or calcium oxide, ethylenediaminetetraacetic acid, and a transition metal-containing material in an aqueous medium, optionally in the presence of an oxidant to convert any transition metal present in a divalent form to its trivalent form; and b) separating the formed mixed-metal chelate by filtration or evaporation. These mixed-metal chelates are useful as catalyst precursors and dietary supplements.

Abstract: A process for producing a ferric aminopolycarboxylic acid chelate with improved long term stability is disclosed. The process involves heating a mixture of iron oxide, ammonia and aminopolycarboxylic acid chelant at an elevated temperature for a sufficient time to improve the stability of the formed chelate.

Abstract: A process for preparing a ferric chelate of an aminopolycarboxylic acid wherein an iron-containing material is reacted with an aminopolycarboxylic acid chelant in the presence of a base, which comprises employing reactants such that the molar ratio of chelant to iron is from about 0.8 to about 0.99, is disclosed. In preferred embodiments the chelate is a ferric ammonium ethylenediaminetetraacetic acid chelate. The inventive chelates show a reduced tendency to form a dark precipitate upon standing. This process is particularly suitable for use in preparing chelates for use in applications such as photographic bleaching. The corresponding ferric chelate composition and products prepared by the described process are also disclosed.

Abstract: A method for the preparation of concentrated, stable iron chelate solutions of alkali metal polyamino succinic acids is disclosed. The method involves the co-feeding of an alkaline alkali-metal succinate solution and a ferric salt solution into a vessel.

Abstract: A process is disclosed for isolating the disodium salt of racemic and meso isomers of ethylenediamine-N,N'-disuccinic acid from alkaline aqueous solutions.

Abstract: A method for the preparation of concentrated, stable iron chelate solutions of alkali metal polyamino disuccinic acids is disclosed. The method involves the controlled addition of the alkaline alkali-metal succinate solution to an agitated aqueous ferric salt solution.

Abstract: Inorganic and organic hypohalites are used to obtain good selectivity to alpha halogenation of alkyl aromatic compounds. Alkali and alkaline earth hypohalites must be used in conjunction with a phase transfer medium. Useful organic hypohalites are the tertiary alkyl hypohalites, which are employed in the presence of free radical generating media such as light or compounds which produce free radicals thermally. At least one mole of hypohalite reactant must be used for every alpha hydrogen in the alkyl aromatic compound.A new bisphenol which contains biphenyl functionality has been made as well as an aromatic polyester derived therefrom.

Abstract: Inorganic and organic hypohalites are used to obtain good selectivity to alpha halogenation of alkyl aromatic compounds. Alkali and alkaline earth hypohalites must be used in conjunction with a phase transfer medium. Useful organic hypohalites are the tertiary alkyl hypohalites, which are employed in the presence of free radical generating media such as light or compounds which produce free radicals thermally. At least one mole of hypohalite reactant must be used for every alpha hydrogen in the alkyl aromatic compound.A new bisphenol which contains biphenyl functionality has been made as well as an aromatic polyester derived therefrom.

Abstract: Bis(haloacylaromatic) compounds have been made by a new process in which monohaloacylated aromatic compounds have been reacted by a coupling reaction. These bis(haloacylaromatic) compounds can be employed as monomers in the preparation of polyesters and polyamides which have easy processability. The monohaloacylated compound is coupled by reacting two moles of the monomer with a carbon or sulfur compound containing at least two halogen atoms in the presence of a Friedel-Crafts catalyst.