Abstract: A new process has been developed for preparing high purity neem seed extract by adsorbing aqueous solutions of neem seed extract containing azadirachtin onto a macroporous polymeric adsorbent followed by desorption using a solvent. The resulting extract, optionally formulated, is a useful insecticide for the control of foliar pests.

Abstract: An ion exchange resin bed capable of hydraulic segregation into discrete zones of ion exchange resins having different ion exchange functionalities, the resins being produced by functionalizing fractions of a single batch or lot of precursor copolymer which have been segregated on the basis of differing hydraulic densities of the different sized particles, and the method for producing the same.

Abstract: A method for removing cumene vapor from a cumene-containing vapor stream comprises passing the vapor stream through a bed of a substantially dry hydrophobic, macroreticular, water-insoluble, crosslinked polymer containing from 20% to 100% by weight of the polymer, of divinylbenzene or a copolymer of divinylbenzene, the balance being ethylvinylbenzene or styrene or mixtures thereof but not more than 50% of either ethylvinylbenzene or styrene, until the capacity of the polymer or copolymer to remove cumene is substantially exhausted. Thereafter, the cumene is desorbed from the mass or bed of the polymer or copolymer by passing steam through said mass or bed. Without drying, the mass or bed is then ready for reuse.

Abstract: An impact resistant nitrogenous polymer comprises a multiphase amine-reactive moiety-containing polymer grafted to a polycarbonamide containing recurring amide linkages as anintegral part of the polymer chain; the grafting, by reaction of an amine-reactive moiety of the polymer with an amine end group of the polycarbonamide. Preferably the amine-reactive moiety-containing polymer is a multiphase carboxylic acid-containing polymer comprising (A) a first elastomer phase that is preferably polymerized from monomers comprising: 50 to 99.

Abstract: A process for the preparation of a .alpha.,.beta.-unsaturated carboxylic acid by reacting formaldehyde, another aldehyde and a mineral acid salt of a secondary amine to form an intermediate Mannich base salt; oxidizing the Mannich base salt to the corresponding aminoacid salt; thermally cracking the aminoacid salt to yield an aqueous reaction products mixture of an .alpha.,.beta.-unsaturated carboxylic acid and the mineral acid salt of the secondary amine; and separating and isolating the aqueous reaction products.

Abstract: An impact resistant nitrogeneous polymer comprises a multiphase amine-reactive moiety-containing polymer grafted to a polycarbonamide containing recurring amide linkages as an integral part of the polymer chain; the grafting, by reaction of an amine-reactive moiety of the polymer with an amine end group of the polycarbonamide. Preferably the amine-reactive moiety-containing polymer is a multiphase carboxylic acid-containing polymer comprising (A) a first elastomer phase that is preferably polymerized from monomers comprising; 50 to 99.

Abstract: A nine-membered ring phosphonate compound having the formula ##STR1## wherein R.sup.1 is hydrogen or methyl, R.sup.2 is phenyl or substituted phenyl wherein the substitution is one or more of halogen, nitro, lower alkyl, cyclohexyl, alkoxy, naphthoxy or phenoxy and R.sup.3 and R.sup.4 are the same or different and are lower alkyl of up to eight carbon atoms, preferably methyl, is formed by the reaction of acrylic or methacrylic acid with a compound of the general formula ##STR2## wherein R.sup.2, R.sup.3 and R.sup.4 are as above. The ring phosphonates are useful for forming flame-retardant compositions from mixtures comprising the phosphonate and methyl methacrylate.

Abstract: A novel process is described for the removal and/or recovery of dissolved antimony from an industrial stream, such as a waste stream, using a strong acid and/or a strong base ion exchange resin, in the hydrogen and hydroxyl forms respectively, to adsorb the antimony.

Abstract: A thermally stable flame-resistant phosphonate polymer of the structure ##STR1## WHEREIN R.sup.1 is methyl or ethyl, R.sup.2 is hydrogen or methyl and n is 3 to 100, is formed by the reaction of acrylic or methacrylic acid with an alkyl bicyclic phosphite of the structure ##STR2## wherein R.sup.1 is as above. The phosphonate polymer is useful in forming flame-resistant acrylic compositions such as molding powders and sheets from mixtures comprising the polymer and methyl methacrylate.This is a division, of application Ser. No. 139,948 filed May 3, 1971, now U.S. Pat. No. 3,755,270.

Abstract: A process for the recovery of methacrylic acid from an aqueous effluent obtained by the vapor phase condensation of formaldehyde and propionic acid, where the effluent further contains unreacted formaldehyde and unreacted propionic acid, and where the recovery steps include: extracting the effluent with an organic solvent capable of azeotroping with propionic acid to obtain an organic phase and an aqueous raffinate; distilling the organic phase to remove 50-100% of the unreacted propionic acid and leaving as bottoms remaining unreacted propionic acid and methacrylic acid; distilling the methacrylic/propionic acid bottoms to obtain remaining unreacted propionic acid overhead and pure methacrylic acid as bottoms; distilling the aqueous raffinate with an entrainer to obtain dilute aqueous formaldehyde overhead and about 50% aqueous formaldehyde as bottoms; and distilling the dilute aqueous formaldehyde taken overhead to concentrate it to about 35% aqueous concentration.

Abstract: A nine-membered ring phosphonate compound having the formula ##STR1## wherein R.sup.1 is hydrogen or methyl, R.sup.2 is phenyl or substituted phenyl wherein the substitution is one or more of halogen, nitro, lower alkyl, cyclohexyl, alkoxy, naphthoxy or phenoxy and R.sup.3 and R.sup.4 are the same or different and are lower alkyl of up to eight carbon atoms, preferably methyl, is formed by the reaction of acrylic or methacrylic acid with a compound of the general formula ##STR2## wherein R.sup.2, R.sup.3 and R.sup.4 are as above. The ring phosphonates are useful for forming flame-retardant compositions from mixtures comprising the phosphonate and methyl methacrylate.

Abstract: This invention discloses an improved process for the manufacture of .alpha.,.beta.-unsaturated carboxylic acid esters from a .beta.-alkoxycarboxylic acid ester prepared by contacting an olefin having 2 to about 15 carbon atoms with an alcohol and carbon monoxide, where this alkoxycarbonylation reaction is performed with mutually independent improvements which include (A) reacting the compounds in the presence of a catalyst having as the major catalytic agent a salt of a platinum group metal and as a co-catalyst a salt of a metal selected from the group consisting of mercury (II) and tin (II), with a reoxidizing agent which is a salt of a multivalent metal having an oxidation potential more positive than the platinum group metal salt, (B) performing the reaction in an improved solvent system comprising the monohydric alcohol, the .beta.-alkoxycarboxylic acid ester and a solvent having a boiling point higher than that of the .beta.

Abstract: An impact resistant nitrogenous polymer comprises a multiphase amine-reactive moiety-containing polymer grafted to a polycarbonamide containing recurring amide linkages as an integral part of the polymer chain; the grafting, by reaction of an amine-reactive moiety of the polymer with an amine end group of the polycarbonamide. Preferably the amine-reactive moiety-containing polymer is a multiphase carboxylic acid-containing polymer comprising (A) a first elastomer phase that is preferably polymerized from monomers comprising 50 to 99.

Abstract: A process is disclosed for distilling corrosive carboxylic acids free of olefinic unsaturation in distillation apparatus constructed of corrodible metal, which includes the steps of introducing a crude dilute solution of such a corrosive acid into the distillation zone, distilling in the presence of an effective amount of p-benzoquinone or of 1,4-naphthoquinone, and recovering the concentrated corrosive acid outside the distillation zone. The amount of p-benzoquinone or of 1,4-naphthoquinone is such as to effectively prevent or reduce to acceptable limits the corrosion of the metal distillation apparatus by such acids, and also to permit this distillation process to be effectuated at those high acid vapor temperatures which otherwise would not be feasible because of the heightened degree of corrosiveness exhibited by the acids at such temperatures.