Abstract: A process for restoring deactivated catalysts containing zeolite with a noble metal of Group VIII of the Periodic Table and to be used in the production of aromatic compounds, wherein decoking of the deactivated catalysts is carried out in the presence of halogen or a halogen-containing compound. This restoration process permits effective restoration of deactivated catalysts and thus is expected to be employed in the fields of petroleum purification, petrochemistry and so forth.

Abstract: A process for preparing 2-(o-aminophenyl)ethanol comprising reducing 2-(o-nitrophenyl)ethanol with hydrogen in the presence of a Raney nickel catalyst is described, in which said reducing is carried out in the presence of a small amount of an alkali compound. The Raney nickel catalyst exhibits improved activity to achieve an increased reaction rate.

Abstract: Alkaline earth metal salts of aziridine-2-carboxylic acid, typically Ca salt, are produced by a reaction of a 2,3-dihalopropionic acid derivative or an .alpha.-haloacrylic acid derivative with an aqueous ammonia in the presence of an alkaline earth metal hydroxide, typically Ca(OH).sub.2.Salts of aziridine-2-carboxylic acid are recovered from such a reaction product as referred to above by a liquid chromatographic technique in which a weak or weakened cation exchanger is utilized.

Abstract: A method of culturing an amino acid racemaseproducing microorganism of the genus Pseudomonas, which comprising culturing said microorganism in a culture medium containing at least one compound selected from the group consisting of glycerol, ethanol, tartaric acid, fumaric acid and succinic acid as a carbon source, and recovering microorganism cells containing the amino acid racemase in an increased amount.

Abstract: A high-octane gasoline is produced by the conversion of a light hydrocarbon containing C.sub.2 -C.sub.7 paraffins and/or C.sub.2 -C.sub.7 olefins using a crystalline aluminogallosilicate catalyst of the formula:aM.sub.2/n O bAl.sub.2 O.sub.3 Ga.sub.2 O.sub.3 cSiO.sub.2 dH.sub.2 Owherein M is a metal selected from an alkali metal, an alkaline earth metal and a mixture thereof, n is the valence of said metal, a is a positive number of (b+1).+-.3.0, b is between 1 and 6, c is between 80 and 490, d is between 1 and 200, c/(b+1) is between 40 and 70, and c/b is between 46.7-140.

Abstract: A process for producing aromatic hydrocarbons which comprises contacting at least one type of hydrocarbon selected from paraffin, olefin, acetylene, cyclic paraffin and cyclic olefin-based hydrocarbons with a catalyst comprising a L-type zeolite treated with a halogen-containing compound and platinum deposited thereon.

Abstract: A process for producing an indole by catalytic reaction of a 2-(o-aminoaryl)ethanol, said reaction being carried out by heating in a liquid phase in the presence of an alkali metal using a catalyst containing a metal selected from the group consisting of a platinum-group metal, nickel and copper.The process is industrially advantageous in that indoles are produced in high yield.

Abstract: A catalyst for production of aromatic hydrocarbons and a process for producing aromatic hydrocarbons from various hydrocarbons using said catalyst are disclosed. The catalyst comprises a L-type zeolite treated with a halogen-containing compound and platinum deposited thereon, which is of high activity and then has a long service life. The process of the present invention using the catalyst enables to produce aromatic hydrocarbons in a yield as high as not less than 80% for a long time. The hydrocarbon feedstock is selected from paraffin, olefin, acetylene, cyclic paraffin, and cyclic olefin-based hydrocarbons.

Abstract: Dioxane derivatives are disclosed which are represented by the formula (I): ##STR1## wherein, R stands for a hydrogen atom or an aliphatic residue having 1 to 10 carbon atoms; R.sup.1 and R.sup.2 stand for a hydrogen atom or a hydrocarbon residue having 1 to 10 carbon atoms, respectively; and R, R.sup.1 and R.sup.2 which exist plurally may be the same or different, respectively.Such dioxane derivatives (I) are produced by reacting a glycolaldehyde represented by the formula (II) ##STR2## with an amine represented by the formula (III)R--NH.sub.2 (III)wherein R, R.sup.1 and R.sup.2 are as defined above.The dioxane derivatives (I) are useful for production of serine derivatives as well as utilized for separation and purification of glycolaldehydes (II).

Abstract: A process for preparing indoles in high yield by reacting anilines and 1,2-glycols in a liquid phase in the presence of a cadmium bromide or iodide/potassium bromide or iodide catalyst. The used catalyst can be easily recovered and when reused, exhibits excellent performance.

Abstract: By the vapor phase reaction of benzene or a monoalkylbenzene with an alkylating agent in the presence of a specific catalyst obtained by subjecting a zeolite to a treatment with a gas containing a silicic acid ester and then a calcination in an oxygen-containing gas, said zeolite being 10 or more with respect to its molar ratio of SiO.sub.2 /X.sub.2 O.sub.3 in which X is at best one member selected from the group consisting of Al, B and Cr and having a constraint index within the range of 1 to 15, various useful 1,4-dialkylbenzenes can be produced not only in high yield but also in high selectivity.