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    • 4. 发明授权
    • Process for the preparation of oligophenyls dihalogenated in the
4,4'-position
    • 制备4,4'-位二卤代低聚苯基的方法
    • US5053566A
    • 1991-10-01
    • US571956
    • 1990-08-23
    • Artur BottaHans-Josef BuyschLothar Puppe
    • Artur BottaHans-Josef BuyschLothar Puppe
    • C07C41/22B01J29/50B01J29/60B01J29/70C07B61/00C07C17/12C07C25/18C07C41/38C07C43/225
    • C07C17/12
    • Oligophenyls dihalogenated in the 4,4'-position, of the formula ##STR1## can be prepared by catalyzed halogenation of oligophenyls of the formula ##STR2## wherein, in the formulae, X.sup.1 and X.sup.2 independently of one another represent chlorine or bromine, preferably chlorine,X.sup.3 denotes hydrogen, chlorine or bromine, preferably hydrogen or chlorine and particularly preferably hydrogen,R.sup.1, R.sup.2 and R.sup.3 independently of one another represent hydrogen, C.sub.1 -C.sub.4 -alkyl (preferably methyl or ethyl and particularly preferably methyl), C.sub.1 -C.sub.4 -alkoxy (preferably methoxy or ethoxy and particularly preferably methoxy), fluorine, chlorine or bromine anda assumes the value zero or one,with halogenating agents, the preparation being carried out in the presence of methylene chloride or solvent mixtures essentially containing methylene chloride and in the presence of zeolites of the L structure type which contain metal cations.
    • 在式(Ⅰ)的4,4'-位上二卤代的低级苯基可以通过式(II)的低聚苯基的催化卤化来制备,其中在式中X1和X2彼此独立地 代表氯或溴,优选氯,X3表示氢,氯或溴,优选氢或氯,特别优选氢,R 1,R 2和R 3彼此独立地表示氢,C 1 -C 4烷基(优选甲基或乙基,特别优选 甲基),C1-C4-烷氧基(优选甲氧基或乙氧基,特别优选甲氧基),氟,氯或溴,并且与卤化剂呈现零或一个值,该制剂在二氯甲烷或溶剂存在下进行 基本上含有二氯甲烷的混合物和在含有金属阳离子的L结构类型的沸石的存在下。
    • 8. 发明授权
    • Process for separating mixtures of m- and p-dichlorobenzene
    • 分离对 - 二氯苯混合物的方法
    • US5386067A
    • 1995-01-31
    • US252154
    • 1994-06-01
    • Ursula PentlingHans-Josef BuyschLothar PuppeKai RohlkRolf GrosserHans-Ingolf Paul
    • Ursula PentlingHans-Josef BuyschLothar PuppeKai RohlkRolf GrosserHans-Ingolf Paul
    • B01D15/00B01D15/04C07C17/38C07C17/389C07C25/08
    • C07C17/389
    • Mixtures of m- and p-dichlorobenzene can be separated by treating such mixtures in the liquid phase with a pentasil zeolite at from 20.degree. to 250.degree. C., a filtrate enriched in m-dichlorobenzene being removed and the p-dichlorobenzene being obtained by desorption of the pentasil zeolite. The pentasil zeolites may contain, as exchangeable cations, protons, cations of the first or second main group of the Mendeleev Periodic System, cations of the rare earth metals or a mixture of a plurality thereof. In order to prepare the liquid phase a solvent is used that belongs to the group of cyclic saturated hydrocarbons having 5 to 15 carbon atoms, alkyl-substituted aromatic hydrocarbons having 8 to 12 carbon atoms, and halogen-substituted aromatic hydrocarbons having 6 to 10 carbon atoms and 1 to 3 halogen atoms. The solvents ethylbenzene, chlorobenzene, p-xylene, p-chlorotoluene and dichlorobenzene are excepted. A mixture of a plurality of these solvents may also be used.
    • 可以通过在20至250℃下用pentasil沸石处理液相中的这种混合物来分离对 - 二氯苯的混合物,除去富含间二氯苯的滤液,将对二氯苯由 五硅沸石的解吸。 戊二烯沸石可以包含作为可交换阳离子的质子,门多列夫周期系统的第一或第二主要组分的阳离子,稀土金属的阳离子或其多个混合物。 为了制备液相,使用属于具有5至15个碳原子的环状饱和烃基团,具有8至12个碳原子的烷基取代的芳族烃和具有6至10个碳原子的卤素取代的芳族烃的溶剂 原子和1至3个卤素原子。 溶剂乙苯,氯苯,对二甲苯,对氯甲苯和二氯苯除外。 也可以使用多种这些溶剂的混合物。