摘要:
This invention relates to catalyst supports, methods for making them, and to catalysts prepared therefrom. More particularly, it relates to binary oxidic catalyst support materials comprising titania and zirconia with high porosity and high surface area prepared by either a pH swing technique or a constant pH technique followed by calcination at a temperature below 450.degree. C., with such materials being impregnated with catalytically active metal components.
摘要:
An alkylaromatic hydrocarbon feed stream is hydrodealkylate in the presence of a catalyst having a reduced rate of deactivation, or a lower coking tendency. The catalyst comprises a gamma-alumina support containing 8 to 12 wt. % Cr.sub.2 O.sub.3 and 0.2 to 0.7 wt. % Na.sub.2 O and having a surface area from 175 to 275 m.sup.2 /g and a pore volume from 0.5 to 1.2 cc/g. The catalyst is also useful in the hydrodesulfurization of thiophene containing hydrocarbon streams.
摘要:
This invention provides a method for the selective dealkylation of alkylated phenols, which method comprises reacting a feed solution comprising a mixture of alkylated phenols with steam in the presence of a catalyst comprising a hydrous carrier, at least one catalyst deactivation suppressor, and at least one promoter. A salt of an alkali metal may be added to the feed to enhance the selectivity of phenol in the product.
摘要:
Chlorine dioxide is generated from an aqueous solution of sodium chlorite in the presence of a catalyst having a higher activity and a reduced rate of deactivation. The catalyst is preferably a Pd/Al.sub.2 O.sub.3 of palladium and another platinum group metal (e.g., Pd+Pt/Al.sub.2 O.sub.3) or palladium and a Group IB metal (e.g., Pd+Au/Al.sub.2 O.sub.3) catalyst containing La.sub.2 O.sub.3 and Nd.sub.2 O.sub.3.
摘要翻译:在具有较高活性和降低失活速率的催化剂存在下,从亚氯酸钠水溶液中产生二氧化氯。 该催化剂优选为钯和另一种铂族金属(例如Pd + Pt / Al 2 O 3)或钯和含有La 2 O 3和Nd 2 O 3的IB族金属(例如Pd + Au / Al 2 O 3)催化剂的Pd / Al 2 O 3。
摘要:
This invention provides processes for the production of benzene from anthracene, 9,10-anthraquinone from anthracene, and benzene from 9,10-anthraquinone. In the conversion of anthracene to 9,10-anthraquinone, anthracene is reacted with a molecular oxygen-containing gas (e.g., air) in the presence of a catalyst and promotor at an elevated temperature (65.degree. to 205.degree. C.). To convert 9,10-anthraquinone to benzene, the anthraquinone is thermally cracked, with or without a suitable catalyst, at a temperature of at least 425.degree. C. An example of a suitable catalyst is synthetic zeolite.
摘要:
This invention relates to catalyst supports, methods for making them, and to catalysts prepared therefrom. More particularly, it relates to binary oxidic catalyst support materials comprising titania and zirconia with high porosity and high surface area prepared by either a pH swing technique or a constant pH technique followed by calcination at a temperature below 450.degree. C., with such materials being impregnated with catalytically active metal components.
摘要:
An alkylaromatic hydrocarbon feed stream is hydrodealkylate in the presence of a catalyst having a reduced rate of deactivation, or a lower coking tendency. The catalyst comprises a gamma-alumina support containing 8 to 12 wt % Cr.sub.2 O.sub.3 and 0.2 to 0.7 wt % Na.sub.2 O and having a surface area from 175 to 275 m.sup.2 /g and a pore volume from 0.5 to 1.2 cc/g. The catalyst is also useful in the hydrodesulfurization of thiophene containing hydrocarbon streams.
摘要翻译:在具有降低的失活速率或较低焦化倾向的催化剂存在下,烷基芳族烃进料流是加氢脱烷基化物。 催化剂包括含有8-12重量%Cr 2 O 3和0.2-0.7重量%Na 2 O并具有175-275平方米/克表面积和0.5-1.2cc / g孔体积的γ-氧化铝载体。 催化剂也可用于含噻吩烃流的加氢脱硫。
摘要:
The present invention provides a process, for the thermal dealkylation of alkylated phenols, which process comprises reacting a feed solution containing alkylated phenols and gaseous hydrogen in the presence of water vapor, the reaction being carried out at total pressure of 400 to 800 psig, temperature ranging from about 1000 .degree. to about 1500.degree. F., and the weight percent water vapor in the reaction being from about 10 to about 40 Wt % of the alkylated phenol feedstock.