Abstract: A process for producing 1,3-bis(3-aminophenoxy)-benzenes which are very useful as a monomer for heat-resistant high molecular weight polymers is provided, which process comprises dehalogenating a bis(3-aminophenoxy)-halogenobenzene by its reduction, which compound is selected from the group consisting of 1,3-bis(3-aminophenoxy)-5-halogenobenzenes, 1,3-bis(3-aminophenoxy)-2,4-dihalogenobenzenes and 1,5-bis(3-aminophenoxy)-2,4-dihalogenobenzenes, these raw material compounds being respectively obtained by reacting a 1,3,5-trihalogenobenzene, a 1,2,3,4-tetrahalogenobenzene or a 1,2,4,5-tetrahalogenobenzene with 3-aminophenol in the presence of a dehydrohalogenating agent.

Abstract: This invention is directed to new azoacylacetamide dispersing agents for azo pigments and azo pigment compositions made therefrom. The pigment compositions of this invention comprise a mixture of dispersing agents which are represented below by abbreviated Formula I and pigments which are represented by the abbreviated Formula II, wherein said dispersing agents are present in an amount of 1-25% and said pigments are present in an amount of 99 to 75%: ##STR1## where: A is an aromatic or heterocyclic amino group;B is an aromatic or heterocyclic bisdiazonium group;D is an aliphatic polyamino group containing at least three nitrogen atoms.

Abstract: Methods are provided for removing biuret from biuret-containing aqueous urea solutions which methods involve contacting a quantity of a biuret-containing aqueous urea feed solution with the hydroxide ion form of an anion exchanger under conditions sufficient to remove at least a portion of the biuret from the feed solution, and regenerating the resulting biuret-containing anion exchanger, at least in part, by contact with a substantially non-alkaline aqueous regenerant under conditions sufficient to remove at least a portion of the biuret from the anion exchanger. After completion of the described contacting with the substantially non-alkaline aqueous regenerant, the anion exchanger can optionally be further regenerated by contact with an aqueous solution of a strong base to remove additional quantities of biuret and/or other anion exchanger contaminants such as alkaline earth metal and carbonate ions and/or compounds.

Abstract: An amide compound of formula 1: ##STR1## wherein R is 1,2,3,4-tetrahydro-1-naphthyl, 1,4-dihydro-1-naphthyl or 3,4-dihydro-1-naphthyl; R.sub.1 is hydrogen or methyl; R.sub.2 is hydrogen or an alkyl; Ar is a phenylene group; and X is hydrogen, a halogen, methyl or methoxy. This amide is useful as a herbicide.

Abstract: The invention relates to new benzoylurea compounds of the general formula ##STR1## wherein R.sub.1 is a hydrogen atom or represents 1 or 2 substituents which are selected from the group consisting of halogen and alkyl and haloalkyl having 1-4 carbon atoms,R.sub.2 is a hydrogen atom or represents 1 or 2 substituents which are selected from the group consisting of chlorine, methyl and trifluoromethyl, andR.sub.3 is a hydrogen atom or represents 1-3 alkyl and/or alkenyl groups each having 1-6 and/or 2-6 carbon atoms respectively,or wherein R.sub.3 together with the cyclohexyl ring to which it is attached forms a bi- or polycyclic hydrocarbyl group having 8-14 carbon atoms and, if desired, substituted with 1-3 alkyl groups each having 1-4 carbon atoms.The compounds have an insecticidal and acaricidal activity. After having been processed to compositions, the compounds may be used for the control of insects and/or mites in a dosage from 1 to 5000 g of active substance per hectare.

Abstract: Biuret is removed from biuret-containing aqueous urea solutions in a multi-cycle process which involves sequential (A) removal of biuret by contact with an anion exchanger and (B) regeneration of the anion exchanger, in which method, in one or more cycles, the anion exchanger regenerant comprises an aqueous solution of a strong base which has been employed to regenerate the anion exchanger in a previous cycle. This procedure allows for recycling, and thus reuse, of the strong base regenerant which results in significant economy.

Abstract: Methods are provided for removing biuret from biuret-containing aqueous urea solutions by contacting the biuret-containing urea solutions with the hydroxide ion form of an anion exchanger under anion exchange conditions in which methods one or more aqueous process streams are either formed from materials which are substantially or completely free of alkaline earth metal and/or carbonate impurities or which process streams are treated either before or during their use in the anion exchange process to reduce their content of contaminant alkaline earth metal and/or carbonate compounds. The anion exchanger can be washed and regenerated with one or more aqueous media including water, aqueous solutions of strong base, acidic chloride solutions, and/or other aqueous solutions, and either batch or continuous (fixed bed) contacting can be employed.

Abstract: Intraocular hypertensive diseases such as glaucoma are treated with compounds represented by formula I ##STR1## or a pharmaceutically acceptable acid addition salt thereof, wherein R.sub.1 is alkyl of two to four carbon atoms;R.sub.2 is --(CH.sub.2).sub.n --C.sub.6 H.sub.4 --R.sub.5 ; wheren is an integer from 1 to 4; andR.sub.5 is --H, --OH, halo, lower alkyl, lower alkoxy, ureido, lower alkyl-ureido, lower alkyl-amido, or formamido;R.sub.3 is hydro or hydroxy; andR.sub.4 is hydro, lower alkyl, amino, or lower alkylamino.

Abstract: This invention relates to a novel method of oxidizing hydrazo compounds to corresponding azo compounds, and more particularly 4,4'-hydrazo-bis-4-cyano-pentanoic acid to 4,4'-azo-bis-4-cyano-pentanoic acid at a temperature close to ambient temperature, said method comprising the step of effecting oxidation with the aid of hydrogen peroxide under the following conditions: catalysis of the reaction by means of UV radiation, operation in aqueous solution at a pH.ltoreq.0.5, said pH being obtained by addition of hydrochloric acid and/or hydrobromic acid, and operation in a reaction medium comprising Br.sup.- ions at a concentration at least equal to 30 ppm.

Abstract: This disclosure describes novel diaryl-alkanamides. These compounds are useful as pharmaceutical agents for ameliorating atherosclerosis by inhibiting the formation and development of atherosclerotic lesions in the arterial wall of mammals.