4results about How to "Reduce post-processing difficulty" patented technology

The application relates to the field of catalysts, and discloses a hydroisomerization catalyst, a preparation method thereof and a hydroisomerization treatment method for hydrocarbon oil, which comprises the following steps: (1) performing molding on a ZSM-48 molecular sieve precursor to obtain a carrier precursor; wherein the water content of the ZSM-48 molecular sieve precursor is not less than 15 wt% based on the mass of the ZSM-48 molecular sieve precursor; (2) performing ammonium exchange on the carrier precursor to obtain a catalyst carrier; (3) introducing an active metal component onto the catalyst carrier to obtain a hydroisomerization catalyst; wherein the active metal component is Pt and / or Pd. The hydroisomerization catalyst obtained by the above preparation method has a lower product condensation point and a higher yield in the hydroisomerization reaction of hydrocarbon oil than the product obtained by the prior art, and has a remarkable effect.

This invention provides a method for preparing 1,2-propanediol and its application. The method includes: step (1): in the presence of an acidic catalyst and water, ring-opening of a first portion of propylene oxide to obtain an acid-catalyzed reaction solution containing 1,2-propanediol; step (2): in the presence of an alkaline catalyst and water, ring-opening of a second portion of propylene oxide to obtain an alkaline-catalyzed reaction solution containing 1,2-propanediol; step (3): mixing the obtained acid-catalyzed reaction solution and the alkaline-catalyzed reaction solution for a neutralization reaction to obtain a mixture containing 1,2-propanediol; wherein, the molar ratio of the first portion of propylene oxide to water in step (1) and the molar ratio of the second portion of propylene oxide to water in step (1) are each independently 1:1-5; using the method of this invention to prepare 1,2-propanediol requires only a lower water ratio to obtain a higher propylene oxide conversion rate and 1,2-propanediol content, and the wastewater volume is lower and the color is colorless after the reaction.

The application discloses a method for recovering chiral phosphoric acid from bedaquiline waste liquid, and belongs to the technical field of waste liquid recovery, and comprises the following steps: (1) separating enantiomers and chiral phosphoric acid salt: recovering bedaquiline split mother liquor under reduced pressure, and obtaining organic phase containing enantiomers and water phase containing chiral phosphoric acid salt after liquid separation; (2) recovering enantiomers: recovering the organic phase in step (1) under reduced pressure, crystallizing, filtering and drying to obtain enantiomers; (3) freeing chiral phosphoric acid: combining the water phase obtained in step (1) with the water phase generated in the bedaquiline freeing process, adjusting the pH to be acidic, adding diatomite for adsorption, filtering to obtain filter cake; (4) recovering chiral phosphoric acid: adding tetrahydrofuran and water into the filter cake, stirring and dispersing, crystallizing, filtering, drying and obtaining chiral phosphoric acid. The application can effectively recover chiral phosphoric acid contained in bedaquiline waste liquid, greatly reduces production cost, and has higher economic benefits.

The invention discloses a naphthalene ring derivative, a synthesis method and application, and provides a series of novel naphthalene ring derivatives substituted by different functional groups. Compared with the existing naphthalene ring derivative, the naphthalene ring derivative provided by the invention is a functional group substituted naphthalene ring, and is easily subjected to subsequent chemical conversion and further converted into a high-added-value compound. According to the efficient synthesis method of the naphthalene ring derivative, the substrate applicability is wide, raw materials are cheap, synthesis is easy, high temperature and use of a catalyst are not needed in the reaction process, and various substituent-substituted naphthalene ring compounds can be prepared. The reaction process is milder, the safety is high, the post-treatment difficulty is reduced, high temperature and high pressure are not needed, only visible light irradiation is needed, meanwhile, the use of expensive metal catalysts and organic photocatalysts is avoided, and the post-treatment difficulty is reduced. The method also has the advantages of simple operation, simple steps, high yield, large-scale synthesis and the like.