Abstract: The present invention relates to an efficient process for the production of alkyl and aryl carbamates of the formula, RR?N—C(O)—OR?, wherein the said process comprises reacting an amine with carbon dioxide and organic halide compound in a solvent medium (use of which is optional), in the presence of a solid metal-containing catalyst, at a pressure of 1-15 bar and temperature between 0 to 180° C., for 0.5 to 5 hrs, separating the catalyst and recovering the corresponding carbamate formed by conventional methods; R, R? and R? are each selected independently from the group consisting of H, alkyl having 1-12 carbon atoms and aryl.

Abstract: A process for the oxidation of hydrocarbons and their derivatives having the general formula RX, wherein R is from n-alkyl, iso-alkyl, benzyl, cyclohexyl, mono, di or tricyclic aryl, or alkenic groups and X is selected from H, OH or Cl to compounds having formula R.sup.1 XY wherein R.sup.1 =(R--H), X has the meaning defined as above and Y=OH; which comprises of reacting the appropriate hydrocarbon or it's derivative of the formula RX where R and X have the meaning given above, with a solution of aqueous hydrogen peroxide at a temperature in the range of 10.degree.-100.degree. C. in the presence of an amorphous titanium-silicate catalyst having molar chemical composition in terms of the anhydrous oxides of TiO.sub.2 : (5-400) SiO.sub.2, having an average micropore radius between 10 and 40 .ANG., an absorption band around 220 nm in the ultraviolet region, a band around 960 cm.sup.-1 in the infrared region, interatomic vectors around 1.6-1.7, 2.7-2.8, 4.1-4.2 and 5.0-5.2 .ANG.

Abstract: A novel micro-meso porous amorphous titanium silicates having a molar composition in terms of the anhydrous oxides of TiO.sub.2 :(5-400) SiO.sub.2, the said titanium silicates being further characterised by (a) the absence of any line corresponding to individual oxides of titanium and silicon in its x-ray diffraction pattern, (b) the presence of interatomic vectors around 1.6-1.7, 2.7-2.8, 4.1-4.2 and 5.0-5.2 .ANG. in the radial electron density distribution, (c) an absorption band around 220 nm in the ultraviolet region corresponding to tetrahedral Si--O--Ti linkage, (d) an absorption band around 960 cm.sup.-1 in infrared region corresponding to tetrahedral Si--O--Ti linkage and (e) a bimodal pore size distribution with the first peak width maximum at a value less than 10 .ANG. and the second peak width maximum between 10 and 100 .ANG., respectively; and a process of preparing said micro-meso porous amorphous titanium silicates wihout any nitrogenated organic base and at a neutral pH of around 7.

Abstract: A process for the preparation of carbofuran which is used as an insecticide. Carbofuran is the N-methylcarbamate of 7-benzofuranol. Carbofuran is prepared by reacting catechol with beta methallyl halide or the alcohol in the presence of a catalyst composite containing a heteropoly acid and reacting the 7-hydroxy 2, 3, dihydro-2, 2, dimethyl benzofuranol thus obtained with methyl isocyanate or with phosgene and methylamine to obtain carbofuran.