Abstract:
Dialkyl carbonates can be prepared by the reaction of carbon monoxide with alkyl nitrites in a continuous gas phase reaction, using a platinum metal catalyst on an amorphous alumosilicate having a content of 30-80 atom% Al, based on the sum of Al and Si, as a support, which catalyst may optionally comprise additional material of a compound of antimony, bismuth, aluminium, copper, vanadium, niobium, tantalum, tin, iron, cobalt, nickel or a mixture of a plurality of these, and hydrogen halide being added in the course of the reaction intermittently or continuously. In this reaction, the dialkyl carbonates are formed with almost quantitative selectivity; the corresponding dialkyl oxalates cannot be detected in most cases.
Abstract:
N-alkylated anilines can be prepared by reaction of anilines with lower alcohols or dialkyl ethers at elevated temperature and in the presence of zeolite catalysts of the pentasil type containing protons and having an SiO.sub.2 /Al.sub.2 O.sub.3 ratio of at least 60.
Abstract translation:N-烷基化苯胺可以通过苯胺与低级醇或二烷基醚在升高的温度下反应,并且在含有质子的五元素类型的沸石催化剂存在下,SiO 2 / Al 2 O 3的比例至少为60来制备。
Abstract:
Thymol can be prepared by reaction of m-cresol with propene at elevated temperature and at atmospheric to superatmospheric pressure by using wide- and medium-pored zeolites which have a pore diameter of at least 5 .ANG. as heterogeneous catalysts.
Abstract:
Phenylketones etherified in the 4-position can be prepared by reaction of aromatic ethers which have a free 4-position with acylating agents, the acylation being carried out in the presence of zeolite catalysts having pore sizes of at least 5 .ANG..
Abstract:
4,4'-dihalobiphenyls can be prepared by catalyzed halogenation of biphenyls with halogenating agents, the catalysts used being zeolites having pore sizes of at least 5 .ANG..
Abstract:
A SiO.sub.2 -bound, substantially carbonate-free, calcium-containing zeolite A granulate in which the calcium content is 0.4 to 1 mole CaO/mole Al.sub.2 O.sub.3 and a process for the production such SiO.sub.2 -bound calcium exchanged zeolite A granulate in a CO.sub.2 -free atmosphere at temperatures of 350.degree. C. to 700.degree. C. The SiO.sub.2 -bound zeolite granulate A being useful as an adsorbent in the recovery of oxygen by the pressure change adsorption process.
Abstract translation:一种SiO 2结合的,基本上不含碳酸盐的含钙沸石A,其中钙含量为0.4〜1摩尔CaO /摩尔Al 2 O 3的颗粒,以及生产这种SiO 2结合的钙交换沸石A颗粒在无CO2的方法 气氛在350〜700℃的温度范围内。结合SiO 2的沸石颗粒A可用作吸附剂,通过压力变化吸附过程回收氧气。