-
公开(公告)号：US5352819A
公开(公告)日：1994-10-04
申请号：US63677
申请日：1993-05-20
IPC分类号： C07C253/30 , C07C293/30
CPC分类号： C07C253/30
摘要： Branched saturated dinitrile byproducts, e.g. 2-methylglutaronitrile, 2-ethylsuccinonitrile and mixtures thereof, are converted into useful ethylenic nitriles by dehydrocyanating same, in vapor phase, in the presence of an at least partially acidified cation exchange substrate, notably a molecular sieve, clay, acid oxide or lamellar phosphate.
摘要翻译： 支链饱和二腈副产物，例如 2-甲基戊二腈，2-乙基琥珀腈及其混合物通过在气相中，在至少部分酸化的阳离子交换基质，特别是分子筛，粘土，酸性氧化物或层状磷酸盐存在下，通过其脱氢氰化而转化为有用的烯属腈 。
-
公开(公告)号：US5132468A
公开(公告)日：1992-07-21
申请号：US643181
申请日：1991-01-18
IPC分类号： B01J21/06 , B01J21/10 , B01J23/10 , B01J23/26 , B01J29/08 , C07B61/00 , C07C37/16 , C07C37/20 , C07C39/08 , C07C41/18 , C07C43/23 , C07C43/253
CPC分类号： C07C37/115
摘要： The alkyl hydroquinones, e.g., methyl hydroquinone (a useful intermediate in the preparation of the monomer methyl hydroquinone diacetate, itself used for the synthesis of thermotropic polymers), are prepared by reacting (C-alkylating) hydroquinone or a monoether thereof with a lower alkanal, in the vapor phase, with a catalytically effective amount of at least one solid metal oxide.
摘要翻译： 烷基氢醌，例如甲基氢醌（制备单体甲基氢醌二乙酸酯，本身用于合成热致聚合物的有用中间体）通过（C-烷基化）氢醌或其单醚与低级链烷烃 在气相中，具有催化有效量的至少一种固体金属氧化物。
-
公开(公告)号：US5082978A
公开(公告)日：1992-01-21
申请号：US701347
申请日：1991-05-09
IPC分类号： B01J21/16 , B01J27/02 , B01J31/10 , C07B61/00 , C07C37/16 , C07C39/08 , C07C39/15 , C07C39/28 , C07C41/14 , C07C41/26
摘要： Mono-, di- and triphenols are selectively monomethylated by reaction with para-dimethoxybenzene in the presence of a catalytically effective amount of an acid catalyst.
摘要翻译： 在催化有效量的酸催化剂存在下，通过与对二甲氧基苯反应，单 - ，二 - 和三酚选择性单甲基化。
-
公开(公告)号：US5001280A
公开(公告)日：1991-03-19
申请号：US346216
申请日：1989-05-02
摘要： Phenol is prepared by directly hydroxylating benzene with nitrous oxide, preferably in vapor phase, on a substrate of acidified zeolite particulates, advantageously ZSM-5 zeolite particulates, and such acidified zeolite particulates having a molar ratio SiO.sub.2 /Al.sub.2 O.sub.3 of greater than about 90, preferably up to 500.
摘要翻译： 苯酚通过在酸化的沸石颗粒的底物（有利地为ZSM-5沸石颗粒）的底物上直接羟基化，一氧化二氮，优选气相羟化，并且这种具有大于约90的摩尔比SiO 2 / Al 2 O 3的酸化的沸石颗粒，优选 最多500。
-
公开(公告)号：US4982013A
公开(公告)日：1991-01-01
申请号：US346215
申请日：1989-05-02
CPC分类号： C07C37/60
摘要： Polyhydroxybenzenes, e.g., the dihydroxybenzenes, are prepared by directly hydroxylating a phenol with nitrous oxide, preferably in vapor phase, on a substrate of acidified zeolite particulates, advantageously ZSM-5 zeolite particulates, and such acidified zeolite particulates advantageously having a molar ratio SiO.sub.2 /Al.sub.2 O.sub.3 of greater than about 90, preferably up to 500.
摘要翻译： 多羟基苯，例如二羟基苯，通过在酸化的沸石颗粒（优选ZSM-5沸石颗粒）的底物上直接用一氧化二氮直接羟基化苯酚，优选气相制备，并且这种酸化的沸石微粒有利地具有SiO 2 / Al 2 O 3大于约90，优选至多500。
-
-
-
-
搜索结果
25 条记录 (耗时 0.019 秒)
