Abstract: A two step hydrothermal process for the preparation of a sodium cation form of zeolite A from heulandite by (1) heat treating a mixture of heulandite in an aqueous solution of sodium hydroxide and filtering the mixture followed by (2) reacting the filtrate with at least 75 percent of a stoichiometric amount of sodium aluminate to form and precipitate zeolite A from solution and recovering zeolite A.

Abstract: An improved process for the preparation of N-monosubstituted carbamates by reacting an aromatic primary amine, urea and a monohydric aliphatic alcohol in the presence of a strongly basic tertiary amine catalyst and optionally an inert solvent.

Abstract: A process for the preparation of N-monosubstituted carbamic acid esters by reacting an unsubstituted carbamic acid ester and an aromatic primary amine at a suitable pressure and reaction temperature in the presence of a monohydric aliphatic alcohol and preferably in the presence of a strongly basic tertiary amine as catalyst. Optionally an inert co-solvent in addition to the alcohol may be employed.

Abstract: In the process of producing polyisocyanates by(a) condensing an alkyl-N-phenylcarbamate having 1 to 3 carbons in the alkyl moiety with formaldehyde, paraformaldehyde a formaldehyde forming compound such as trioxane in the presence of an acid to produce a condensate containing a mixture of diphenylmethane dicarbamates and polymethylene polyphenyl carbamates with by-product N-benzyl compounds, rearranging said N-benzyl compounds in said condensate with acid catalyst to obtain a pyrolysis feed mixture containing a mixture of diphenylmethane dicarbamates and polymethylene polyphenyl carbamates with by-product amine and amine salts, and(b) thermally decomposing the carbamate moieties in the pyrolysis feed mixture to isocyanate moieties to produce a polyisocyanate mixture of diphenylmethane diisocyanates and polymethylene polyphenyl isocyanates,the improvement comprises increasing the percent isocyanate content of said polyisocyanates by prior to step (b) removing the amine and amine salt by-products by extracting

Abstract: Dimethyl sebacate is recovered from a reaction mixture containing it in predominant amount and minor amounts of other dimethyl esters of C.sub.10 -dicarboxylic acids by stepwise recrystallization using a solvent selected from the group consisting of acetone, diethyl ether, tetrahydrofuran, alkanols having 1 to 4 carbon atoms, aromatic hydrocarbons having 6 to 12 carbon atoms, alkanes and alkenes having 5 to 8 carbon atoms or a mixture of one of those solvents which is miscible with water, and water as recrystallization solvent.

Abstract: An improved adhesive binder composition is provided for the preparation of lignocellulosic composite molded articles, especially flake or particleboard, made from moldable compositions which comprises an organic polyisocyanate-alkylene oxide or halogenated alkylene oxide and optionally lignin, for application to the lignocellulosic material prior to the molding process to form the composite product.

Abstract: An adhesive binder composition is provided for the preparation of lignocellulosic composite molded articles such as flake or particle board, made from moldable compositions which comprises an organic di- or polyisocyanate and a liquid mixture of ethylene carbonate and propylene carbonate and optionally lignin, for application to the lignocellulosic material prior to the molding process to form the composite product.

Abstract: An adhesive binder composition is provided for the preparation of lignocellulosic composite molded articles such as flake or particle board, made from moldable compositions which comprises an organic di- or polyisocyanate and a liquid dialkyl ester of carbonic acid and optionally lignin, for application to the lignocellulosic material prior to the molding process to form the composite product.

Abstract: In the process for oxidizing methacrolein to a methacrylic acid salt with an oxidizing gas in a strongly alkaline medium at a temperature of 0 to 100.degree. C. and in the presence of a finely divided silver catalyst and recovering methacrylic acid by acidification, the improvement which comprises carrying out said oxidation in the presence of a small amount of dissolved alkali metal carbonate.

Abstract: A process for the preparation of N-alkyl-monosubstituted carbamic acid esters by reacting an unsubstituted carbamic acid ester and an aliphatic primary amine at a suitable pressure and reaction temperature in the presence of a monohydric aliphatic alcohol and preferably in the presence of a strongly basic tertiary amine as catalyst. Optionally an inert co-solvent in addition to the alcohol may be employed.

Abstract: Liquid reaction product mixtures of diphenylmethane diisocyanates and polymethylene polyphenyl isocyanates resulting from the thermal decomposition of the corresponding carbamates produced by the acid condensation of an N-aryl carbamic acid ester, such as ethylphenylcarbamate, with formaldehyde are storage stabilized against an increase in viscosity and decrease in free NCO content, by incorporating therein an effective amount of a dichloroparabanic acid compound having the formula ##STR1## wherein R is an alkyl group of from 1 to 4 carbon atoms or a phenyl group which may be substituted with a 1 to 4 carbon atom alkyl group.

Abstract: Liquid reaction product mixtures of diphenylmethane diisocyanates and polymethylene polyphenyl isocyanates resulting from the thermal decomposition of the corresponding carbamates produced by the acid condensation of an N-aryl carbamic acid ester, such as ethylphenylcarbamate, with formaldehyde are storage stabilized against an increase in viscosity and decrease in free NCO content, by incorporating therein an effective amount of a compound having the formula ##STR1## wherein x plus y is equal to 3 and z is an integer of from 0 to 3.

Abstract: Liquid reaction product mixtures of diphenylmethane diisocyanates and polymethylene polyphenyl isocyanates resulting from the thermal decomposition of the corresponding carbamates produced by the acid condensation of an N-aryl carbamic acid ester, such as ethylphenylcarbamate, with formaldehyde are storage stabilized against an increase in viscosity and decrease in free NCO content, by incorporating therein an effective amount of a compound having the formula ##STR1## wherein R is hydrogen or an alkyl group having up to 4 carbon atoms, x plus y is equal to 3 and z is an integer of from 0 to 3.

Abstract: A process for producing unsaturated methyl nonadienoate and methyl nonatrienoate monesters useful as precursors for pelargonic acid which comprises contacting, in a reaction inert medium, butadiene and methyl-2,4-pentadienoate in a molar ratio of 2:1 to 10:1 at a temperature of 40.degree. to 120.degree. C. under an inert atmosphere and in the presence of a catalytic amount of a homogeneous palladium (II) complex of the formula ##STR1## wherein R is alkyl, chloroalkyl, bromoalkyl or fluoroalkyl having from 1 to 6 carbon atoms or aryl having 6 to 12 carbon atoms; Q is phosphorous or arsenic and R' is alkyl, aminoalkyl or alkoxy having 1 to 6 carbon atoms or aryl or aryloxy having 6 to 12 carbon atoms.The foregoing precursors may subsequently be hydrogenated to methyl pelargonate (methyl nonanoate) and pelargonic acid may then be obtained by acid-catalyzed hydrolysis of methyl pelargonate.

Abstract: A process for producing an unsaturated diester useful as a precursor for sebacic acid which comprises contacting, in a reaction inert medium, methyl penta-2,4-dienoate at a temperature of 30 to 150.degree. C. under an inert atmosphere with a catalytic amount of a homogeneous palladium (II) complex of the formula ##STR1## wherein Q is phosphorous or arsenic; R is alkyl, trichloroalkyl, tribromoalkyl or trifluoroalkyl having from 1 to 6 carbon atoms or aryl having 6 to 12 carbon atoms and R' is alkyl, aminoalkyl or alkoxy having 1 to 6 carbon atoms or aryl or aryloxy having 6 to 12 carbon atoms.The foregoing precursor may subsequently be hydrogenated to dimethyl sebacate and sebacic acid may then be obtained by acid-catalyzed hydrolysis of dimethyl sebacate.

Abstract: A method for the preparation of a cerium or thorium (lanthanide or actinide metal) promoted single phase vanadium(IV)bis(metaphosphate) catalyst useful for the vapor phase oxidation of hydrocarbons and particularly the oxidation of linear C.sub.4 unsaturated olefins to prepare maleic anhydride.

Abstract: A method for the preparation of a chromium, molybdenum or tungsten (Group VIB metal) promoted single phase vanadium(IV)bis(metaphosphate) catalyst useful for the vapor phase oxidation of hydrocarbons and particularly the oxidation of linear C.sub.4 unsaturated olefins to prepare maleic anhydride.

Abstract: In the process of producing polyisocyanates by(a) condensing an alkyl-N-phenylcarbamate having 1 to 3 carbons in the alkyl moiety in the presence of an acid to produce condensate containing diphenylmethane dicarbamates and polymethylene polyphenyl carbamates with by-product N-benzyl compounds, rearranging said N-benzyl compounds in said condensate with acid catalyst to obtain a pyrolysis feed mixture containing diphenylmethane dicarbamates and polymethylene polyphenyl carbamates,(b) thermally decomposing the carbamate moieties in the pyrolysis feed mixture to isocyanate moieties to produce polyisocyanates,the improvement comprises increasing the percent isocyanate content of said polyisocyanates by prior to step b) producing a solution by adding an organic cosolvent to the feed mixture, extracting that solution with an aqueous acid and removing the acid extract.

Abstract: In the process of producing polyisocyanates by(a) condensing an alkyl-N-phenylcarbamate having 1 to 3 carbons in the alkyl moiety in the presence of an acid to produce condensate containing diphenylmethane dicarbamates and polymethylene polyphenyl carbamates with by-product N-benzyl compounds, rearranging said N-benzyl compounds in said condensate with acid catalyst to obtain a pyrolysis feed mixture containing diphenylmethane dicarbamates, polymethylene polyphenyl carbamates and 0.02 to 1.0 percent by weight of amine impurities as NH.sub.

Abstract: In the process of producing a diisocyanate comprising(a) condensing and rearranging alkyl phenylcarbamate and formaldehyde under acidic conditions to form dialkyl methylene bis(phenylcarbamate) and(b) thermally decomposing the dialkyl methylene bis(phenylcarbamate) to diphenylmethane diisocyanate,the improvement comprises prior to step (b) treating the reaction product of (a) by first distilling the reaction product of (a) under reduced pressure at a temperature below 120.degree. C. until all solvent is removed and 65-85% of the unreacted alkyl phenylcarbamate present is removed, discontinuing the distillation, adding a polar solvent to undistilled distillation residue and selectively crystallizing and separating dialkyl methylene bis(phenylcarbamate) from the distillation residue.