System for the synthesis of a cerium(III)-antimony molybdophosphate catalyst for esterification
A controlled synthesis system for cerium(III)-antimony molybdophosphate catalysts addresses the limitations of conventional esterification processes by ensuring uniformity and stability, facilitating efficient and sustainable esterification reactions.
Patent Information
- Application Number
- DE202025107014
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-11-15
- Publication Date
- 2026-01-08
- Estimated Expiration
- 2035-11-30
AI Technical Summary
Conventional esterification processes face challenges such as corrosion, catalyst recovery difficulties, waste generation, and limited recyclability due to the use of strong homogeneous acids, while existing heterogeneous catalysts lack uniform synthesis, optimal acidity, and high catalytic activity.
A controlled synthesis system for cerium(III)-antimony molybdophosphate catalysts is developed through precise precipitation, filtration, washing, and activation steps, ensuring uniform inorganic framework formation and enhanced structural integrity, allowing for efficient esterification reactions.
The system produces a stable and reusable catalyst that promotes efficient esterification reactions with high catalytic activity, enabling easy catalyst separation and reuse, thus enhancing sustainability and operational efficiency.
Abstract
Description
Field of invention
[0001] The invention relates to a system for the synthesis of a cerium(III) antimony molybdophosphate catalyst and its application to increase the efficiency of esterification reactions. Background of the invention
[0002] Esterification reactions represent an important class of organic transformations used in the production of fine chemicals, pharmaceuticals, polymers, fragrances, and biodegradable materials. Conventional esterification processes often require strong homogeneous acids, which presents challenges such as corrosion, difficulties in catalyst recovery, waste generation, and limited recyclability. To overcome these limitations, heterogeneous catalysts are gaining importance due to their stability, reusability, and environmental benefits. Cerium-based inorganic ion exchange materials are known for their strong acidity, thermal stability, and catalytic potential. In particular, antimony molybdophosphate frameworks offer structural stability and active sites suitable for acid-catalyzed reactions.However, to achieve uniform synthesis, optimal acidity, and high catalytic activity, a controlled preparation environment is required that ensures precise mixing and precipitation of multi-component metal phosphates. Therefore, there is a need for a system for the synthesis of cerium(III)-antimony molybdophosphate catalysts with controlled composition, morphology, and catalytic functionality for efficient esterification applications. Summary of the invention
[0003] The invention provides a system for the synthesis of cerium(III)-antimony-molybdophosphate catalysts through controlled precipitation, filtration, washing, and activation steps. The system enables the precise addition of cerium, antimony, molybdate, and phosphate precursors to a reaction environment where temperature, pH, and mixing rate are regulated to ensure the formation of a uniform inorganic framework. The synthesized catalyst exhibits desirable physicochemical properties such as stability, acidity, and surface activity. The system also includes drying and calcination modules to enhance the structural integrity and catalytic functionality of the final material.
[0004] The invention further provides a catalytic reaction system that enables the use of synthesized cerium(III) antimony molybdophosphate in esterification reactions. The heterogeneous catalyst promotes the efficient conversion of the reactants to esters under controlled temperature and reaction time. After the reaction, the catalyst can be separated and reused, simplifying handling and ensuring sustainability. The system thus offers an effective platform for the production and application of a robust inorganic catalyst for esterification processes. Detailed description
[0005] The system includes a precursor preparation module in which aqueous solutions of cerium(III), antimony, molybdate, and phosphate salts are prepared at controlled concentrations. Each precursor is maintained under defined temperature and pH conditions to ensure its stability before mixing. A reaction vessel equipped with an agitator and temperature control receives the precursors in a controlled sequence to initiate the precipitation of cerium(III) antimony molybdophosphate.
[0006] The mixing environment is carefully regulated to ensure homogeneous nucleation and growth of the catalyst particles. The system allows for the adjustment of reaction parameters such as addition rate, pH, and ionic strength to control the composition and morphology of the material. As the inorganic solid forms, continuous stirring ensures uniform distribution and prevents agglomeration.
[0007] After precipitation, the reaction mixture is transferred to a filtration unit that separates the solid catalyst from the liquid medium. The collected solid is then washed with deionized water to remove unreacted ions and impurities. This washing process ensures the purity of the catalyst material and improves reproducibility.
[0008] The washed catalyst is then subjected to a drying module in which moisture is removed by controlled heating without altering the structure. In some embodiments, a calcination step can be employed to improve crystallinity, acidity, and catalytic activity. The dried material obtained in this way forms the active cerium(III)-antimony molybdophosphate catalyst.
[0009] For catalytic applications, the system includes an esterification reaction chamber into which the catalyst is introduced along with alcohol and acid as reactants. The chamber ensures controlled reaction temperature, mixing, and reaction time to enable efficient esterification. The solid catalyst provides acidic active sites that accelerate the esterification.
[0010] After the reaction, the solid catalyst is separated by simple filtration, yielding the ester product. The catalyst can be washed, dried, and reused, highlighting the economic and environmental advantages of the system. The catalyst's stability ensures its performance over multiple cycles.
[0011] The system also enables the optimization of reaction conditions to maximize yield, for example by adjusting the molar ratios of the reactants, the catalyst loading, and the temperature settings. By integrating synthesis and catalytic application within a unified framework, the invention enables an optimized and efficient esterification process.
[0012] Overall, the invention offers a robust system for the production of cerium(III)-antimony molybdophosphate catalyst and its use in esterification reactions. This ensures high catalytic activity, easy recovery, and excellent operational stability.
Claims
[1] A system for the synthesis of cerium(III) antimony molybdophosphate catalyst, comprising precursor preparation, controlled precipitation, filtration, washing and drying to obtain a stable inorganic catalyst material. [2] System according to claim 1, wherein the reaction parameters, including pH, temperature and stirring speed, are controlled to achieve a uniform catalyst morphology and composition. [3] System according to claim 1 or 2, comprising a synthesized catalyst used to promote esterification reactions under controlled temperature and reaction time. [4] System according to claim 3, wherein the catalyst is recoverable and reusable after the esterification reaction.