摘要:
PREPARATION OF PHENYL ESTERS AND, IF DESIRED, PHENOL BY GASEOUS PHASE REACTION OF BENZENE, A CARBOXYLIC ACID AND MOLECULAR OXYGEN IN THE PRESENCE OF A COMPOUND OF A NOBLE METAL OF GROUP VIII OF THE MENEDELEEFF PERIODIC TABLE AS CATALYST.
摘要:
A process for the manufacture of pivalolactone from the anhydride of a Beta -acyloxypivalic acid or the mixed anhydride of a Beta -acyloxypivalic acid with a low aliphatic carboxylic acid with up to 5 carbon atoms by thermal splitting at temperatures within the range of from 150*C to 350*C on catalysts supported on carriers.
摘要:
Solid gold hydroxydiacetate of the formula Au(OH)(O2CCH3)2 which is well suitable as catalyst or catalyst component for oxidation reactions. The novel compound can be obtained by preparing an aqueous solution containing gold ions and acetate ions, removing the solvent, dissolving the residue obtained in a polar solvent precipitating the gold hydroxydiacetate by adding a non polar solvent and isolating it.
摘要:
B-ACETOXPIVALIC ANHYDRIDE, A NOVEL COMPOUND PARTICULARLY SUITABLE FOR THE MANUFACTURE OF PIVALOLACTONE, AND A PROCESS FOR MAKING SAME BY REACTION OF B-ACETOXYPIVALIC ACID WITH AN EXCESS AMOUNT OF ACETIC ANHYDRIDE. THE PRESENT INVENTION RELATES TO B-ACETOXYPIVALIC ANHYDRIDE AND A PROCESS FOR MAKING SAME.
摘要:
Process for the preparation of pivalolactone by thermally splitting off acetic acid from Beta -acetoxy-pivalic acid in the presence of alkali metal and/or alkaline earth metal compounds applied to a special carrier material, the pore volume of which contains more than 50% of macropores having a pore diameter of from 100 to 1000 A.
摘要:
THE INVENTION PROVIDES A PROCESS FOR THE CATALYTIC PREPARATION OF PHENYL ESTERS AND, IF DESIRED, PHENOL FROM BENZENE AND SATURATED ALIPHATIC CARBOXYLIC ACIDS IN THE PRESENCE OF A CATALYST COMPRISING A NOBLE METAL OF SUBGROUP VIII OF THE PERIODIC TABLE AND CARBOXYLATES OF METALS OF BROUP IIB, III OR IV OF THE PERIODIC TABLE.
摘要:
CATALYLIC MANUFACTURE OF OXAYLATION PRODUCTS AND OPTIONALLY HYDROXYLATION PRODUCTS OF CONDENSED AROMATIC CMPOUNDS FROM CONDENSED AROMATIC COMPOUNDS AND SATURATED ALIPHATIC OR CYCLOALIPHATIC CARBOXYLIC ACIDS AND MOLECULAR OXYGEN IN THE PRESENCE OF A NOBLE METAL OF SUB-GROUP 8 OF THE MEDELEEFF PERIODIC TABLE OR COMPOUNDS THEREOF, THE STABLE VALENCY OF THIS NOBLE METAL IN SAID COMPOUNDS BEING AT MOST 4.
摘要:
Isopropyl esters of carboxylic acids having up to 20 carbon atoms are prepared by passing propylene and the respective carboxylic acid continuously in parallel flow over an acid ion exchanger of the sulfonic acid type. The service life of the catalyst is greatly improved by adding a small amount of a strong mineral acid.
摘要:
Alpha -PHENYL- Beta , Beta -PENTAMETHYLENE-GLUTARIC ACID DINITRILES AND THEIR PREPARATION FROM CYCLOHEXYLIDENE ACETONITRILE AND BENZYLCYANIDES IN THE PRESENCE OF BASIC CATALYSTS IN THE LIQUID PHASE.