2results about How to "High isomerization selectivity" patented technology

The application discloses a catalyst for producing low-haze lubricating oil base oil and a preparation method and application thereof. The catalyst contains hydrogen type ZSM-22 / ZSM-23 eutectic molecular sieve, and the mass content of the ZSM-22 molecular sieve in the hydrogen type ZSM-22 / ZSM-23 eutectic molecular sieve is 10-95%, preferably 15-90%. The preparation method of the catalyst comprises the following steps: (1) preparing hydrogen type ZSM-22 / ZSM-23 eutectic molecular sieve; (2) mixing, shaping, drying and calcining the hydrogen type ZSM-22 / ZSM-23 eutectic molecular sieve prepared in the step (1), macroporous alumina and a binder to obtain a carrier; and (3) introducing noble metal active components into the carrier obtained in the step (2) and obtaining the final catalyst after drying and calcining. The catalyst prepared by the method has high weak acid content and appropriate strong acid content, can improve the liquid yield, and greatly reduces the haze point of the lubricating oil base oil.

The invention relates to a preparation method of a catalyst for catalyzing isomerization of n-butane, which comprises the following steps: preparing a composite carrier from TiO2 and Al2O3, carrying out coating modification on the composite carrier by using a transition metal oxide, and carrying out loading of active noble metal Pt or Pd and modification and reduction of a chlorinating agent by using an impregnation method. The preparation method comprises the following steps: preparing a composite carrier with an acidic framework from titanium oxide and aluminum oxide through a simple mixing and forming method, then coating and modifying the composite carrier with a transition-state metal oxide, and then simply roasting to obtain the metal oxide with oxygen vacancy and intermediate valence. After being loaded with noble metal, the catalyst can interact to play a role in dispersing active metal, and isomerization of n-butane at active sites is improved. In a fixed bed reaction, a proper amount of catalyst is added into the reaction, so that a good reaction effect is achieved, and reaction results show that the conversion rate of n-butane is 69.2%, the selectivity of isobutane is 98.1%, and the yield of isobutane is 67.9%.