摘要:
A process for shape selective hydrocarbon conversion involves contacting a hydrocarbon feedstream under conversion conditions with a catalytic molecular sieve which has been modified by treatment with an amino silane polymer while molecular sieve acid sites are protected. When the process is toluene disproportionation, a toluene feedstream may also contain a second silicon source which is a high pxylene selectivating agent. The invention also includes the modification method and the shape selective catalyst which results from the modification.
摘要:
A process for shape selective hydrocarbon conversion involves contacting a hydrocarbon feedstream under conversion conditions with a catalytic molecular sieve which has been modified by treatment with an amino silane polymer while molecular sieve acid sites are protected. When the process is toluene disproportionation, a toluene feedstream may also contain a second silicon source which is a high p-xylene selectivating agent. The invention also includes the modification method and the shape selective catalyst which results from the modification.
摘要:
A process for shape selective hydrocarbon conversion involves contacting a hydrocarbon feedsteam under conversion conditions with a modified catalytic molecular sieve which has been modified by being pre-selectivated with a first silicon source, then steamed. The feedstream may also contain a second silicon source which is a high efficiency para-xylene selectivating agent. The method for modifying the molecular sieve is also described.
摘要:
A process for shape selective hydrocarbon conversion involves contacting a hydrocarbon feedsteam under conversion conditions with a modified catalytic molecular sieve which has been modified by being pre-selectivated with a first silicon source, then steamed. The feedstream may also contain a second silicon source which is a high efficiency para-xylene selectivating agent. The method for modifying the molecular sieve is also described.
摘要:
A process for catalytic cracking and C3/C4 olefin alkylation with phosphorus stabilized faujasite catalyst is disclosed. Catalytic cracking produces C3 and C4 olefins, which are alkylated using phosphorus stabilized and water activated cracking catalyst. Spent alkylation catalyst may be discharged into the FCC unit.
摘要:
A process is provided for effecting hydroisomerization of a C.sub.4 -C.sub.8 paraffin by contacting the same under hydroisomerization conditions with a catalyst comprising a porous crystalline zeolite characterized by a silica/aluminum mole ratio of greater than 12 and a constraint index within the approximate range of 1 to 12, which zeolite has undergone controlled pretreatment by contact with water to enhance the acid activity thereof, expressed as alpha, to greater than about 300. The catalyst also comprises, intimately combined therewith, a minor proportion of a Group VIII metal.
摘要:
A method for synthesizing a zeolite bonded to a substrate utilizes a reaction mixture having a H.sub.2 O/YO.sub.2 molar ratio of at least 25 and Y is a tetravalent element, particularly silicon.A structure made according to this method includes a film of interconnected zeolite crystals bonded to a substrate and the structure is characterized by a value r representing the mg of zeolite/cm.sup.2 of substrate surface and a value e representing the coating efficiency as mg of bonded zeolite/mg of YO.sub.2 initially in the synthesis mixture; wherein r is at least 0.5 and e is at least 0.05.Processes are provided for separation, sorption, organic feedstock conversion and NO.sub.x conversion over the structure.
摘要翻译:合成与底物结合的沸石的方法利用H 2 O / YO 2摩尔比至少为25的反应混合物,Y为四价元素,特别是硅。 根据该方法制造的结构包括结合到基底上的相互连接的沸石晶体的膜,该结构的特征在于表示基底表面的沸石/ cm 2的mg值,代表涂覆效率的值为mg的粘结的沸石 / mg的YO2最初在合成混合物中; 其中r为至少0.5,e为至少0.05。 提供了在结构上进行分离,吸附,有机原料转化和NOx转化的方法。
摘要:
A catalytic process is provided for converting lower monohydric alcohols and their ethers, especially methanol and dimethyl ether, to a hydrocarbon mixture rich in C.sub.2 -C.sub.3 olefins and mononuclear aromatics with high selectivity for para-xylene production by contact, under conversion conditions, with a catalyst bed comprising a major proportion of particle-form inert solid diluent having intermixed therewith a crystalline aluminosilicate zeolite characterized by (1) a crystallite size not greater than 0.5 micron, (2) a particle size less than 2 millimeters in its smallest cross-sectional dimension, (3) a silica to alumina ratio of at least about 12 and (4) a constraint index, as hereinafter defined, within the approximate range of 1 to 12.
摘要:
A method for synthesizing a zeolite bonded to a substrate utilizes a reaction mixture having a H.sub.2 O/YO.sub.2 molar ratio of at least 25 and Y is a tetravalent element, particularly silicon.A structure made according to this method includes a film of interconnected zeolite crystals bonded to a substrate and the structure is characterized by a value r representing the mg of zeolite/cm.sup.2 of substrate surface and a value e representing the coating efficiency as mg of bonded zeolite/mg of YO.sub.2 initially in the synthesis mixture; wherein r is at least 0.5 and e is at least 0.05.Processes are provided for separation, sorption, organic feedstock conversion, light paraffin dehydrogenation and NO.sub.X conversion over the structure.
摘要翻译:合成与底物结合的沸石的方法利用H 2 O / YO 2摩尔比至少为25的反应混合物,Y为四价元素,特别是硅。 根据该方法制造的结构包括结合到基底上的相互连接的沸石晶体的膜,该结构的特征在于表示基底表面的沸石/ cm 2的mg值,代表涂覆效率的值为mg的粘结的沸石 / mg的YO2最初在合成混合物中; 其中r为至少0.5,e为至少0.05。 提供了在结构上进行分离,吸附,有机原料转化,轻链烷烃脱氢和NOX转化的方法。
摘要:
A process for converting noxious nitrogen oxides present in gaseous effluent to N.sub.2 comprising reacting the gaseous effluent with an effective amount of reducing agent, e.g., ammonia, in the presence of a catalyst structure comprising a film of interconnected zeolite crystals bonded to a substrate, said catalyst structure being characterized by a value r representing the mg of zeolite/cm.sup.2 of substrate surface and a value e representing the coating efficiency as mg of bonded zeolite/mg of YO.sub.2 initially in the synthesis mixture, wherein r is at least 0.5 and e is at least 0.05.
摘要翻译:在气态流出物中存在的有害氮氧化物转化为N 2的方法包括使气态流出物与有效量的还原剂(例如氨)在催化剂结构存在下反应,所述催化剂结构包含键合到基底的相互连接的沸石晶体的膜, 催化剂结构的特征在于表示基质表面的沸石/ cm 2的mg值,最初在合成混合物中表示作为结合沸石/ mg的YO的涂层效率的值e,其中r为至少0.5,e为 至少0.05。