2results about How to "Reduce hydrolysis rate" patented technology

The application provides a titanium dioxide type low-temperature hydrogenolysis catalyst and a preparation method and application thereof. The catalyst comprises a titanium dioxide carrier and an active component loaded on the titanium dioxide carrier, and the active component comprises scandium oxide and tungsten oxide. The preparation method of the catalyst comprises the following steps: dipping the titanium dioxide carrier in a mixed solution of scandium salt and tungsten salt for a period of time, so that the scandium salt and the tungsten salt are loaded on the titanium dioxide carrier; and then drying and calcining the titanium dioxide carrier loaded with the scandium salt and the tungsten salt, to obtain the titanium dioxide type low-temperature hydrogenolysis catalyst. The catalyst has good sulfur dioxide hydrogenation activity and organic sulfur hydrolysis activity, and can be applied to a process for treating sulfur recovery tail gas at a low temperature of 210-220 DEG C.

This invention discloses a method for preparing a highly reactive AKD emulsion, as well as the high-reactivity AKD emulsion and its applications. The method includes the following steps: slowly adding the oil phase to the aqueous phase and pre-emulsifying for 10-20 minutes under high-speed shear emulsification to obtain a coarse emulsion; pumping the coarse emulsion into a dual-grinding-disc system composed of a first colloid mill and a second colloid mill connected in series, where the emulsion is successively ground and dispersed by the two grinding discs to obtain a refined emulsion; sending the refined emulsion into a circulating stabilization tank, continuously stirring at 40-50°C, and then returning the emulsion to the inlet of the dual-grinding-disc system via a circulating pump for cyclic grinding and stabilization treatment; cooling and filtering to obtain a highly reactive AKD emulsion. This invention utilizes differentially spaced dual-grinding-disc series grinding combined with low-temperature cyclic stabilization. Through stepwise refinement and cyclic stabilization treatment, it significantly reduces the emulsion particle size, improves particle size uniformity, enhances the interfacial reactivity of AKD particles, and greatly inhibits hydrolysis, thereby achieving efficient sizing at low dosages.