33results about How to "High toluene conversion" patented technology

The invention discloses a catalyst for side-chain alkylation of toluene and methanol and a preparation method for styrene. The catalyst comprises: an ordered mesoporous molecular sieve catalyst and an oxygen-free methanol dehydrogenation catalyst; the ordered mesoporous molecular sieve catalyst doped with alkali metal ions. On the one hand, the catalyst utilizes the good dehydrogenation performance of the methanol anaerobic dehydrogenation catalyst to produce formaldehyde as a real alkylation agent; on the other hand, it utilizes the excellent side chain alkylation performance of the alkali metal ion-modified mesoporous molecular sieve catalyst, The products styrene and ethylbenzene are obtained, thereby obtaining higher conversion rate of toluene and selectivity of styrene-ethylbenzene. Another aspect of the present invention also provides a styrene preparation method using the catalyst.

A catalyst for methylating toluene to prepare xylene with high selectivity and low requirement to environment features that the combined organic amine-ether template is used to prepare ZSM-5 molecular sieve, and said ZSM-5 molecular sieve is then modified by organosilicon.

The invention discloses a composite catalyst for producing styrene by side-chain alkylation of toluene and methanol, and a method for preparing styrene. The catalyst comprises: a basic molecular sieve catalyst and a loaded boron catalyst. When the composite catalyst is used in the side chain alkylation reaction of toluene and methanol, it can effectively control the decomposition of methanol and the hydrogen transfer reaction between styrene and methanol during the reaction process, inhibit the production of ethylbenzene, and obtain a higher conversion of toluene rate and styrene selectivity. Another aspect of the present invention also provides a styrene preparation method using the catalyst.

The invention discloses an alkylation catalyst containing modified ZSM-11 zeolite and its application. In terms of weight percentage of the catalyst, it has the following composition: ZSM-11 zeolite 30%~85%, binder 10%~60%, alkali metal oxide 0.1%~10%, ZSM-11 zeolite modification additive silica 1 %~20%, ZSM-11 zeolite modification additive rare earth metal oxide 0.5%~30%. The catalyst of the invention is applied in the toluene alkylation process for synthesizing p-methylethylbenzene from toluene and ethylene, and has good catalytic reaction effect.

The invention discloses a toluene disproportionation and transalkylation catalyst, and a preparation method and application thereof. The catalyst is composed of hydrogen-type ZSM-5 molecular sieve and an inorganic refractory oxide, the content of hydrogen-type ZSM-5 molecular sieve is 10 wt%-90 wt%, the molar ratio of silicon oxide to aluminium oxide is 20-100, the specific surface area is 350-550 m<2> / g, the molecular sieve possesses weak acids, strong acids and superacids at the same time, the total acid content is 0.25-0.82 mmol / g, the molar ratio of Bronsted acids to Lewis acids is 1.1-2.1, and the molar ratio of the acid content sum of strong acids and superacids to the acid content of weak acids is 1.2-2. The catalyst is employed for toluene disproportionation and transalkylation, and has the characteristics of high toluene conversion rate and high xylene selectivity.