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Method for Decarboxylation of Fatty Acids
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A fatty acid and decarboxylation technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of high energy consumption and high production costs
Active Publication Date: 2021-12-28
CHINA PETROLEUM & CHEM CORP +1
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[0007] The technical problem to be solved by the present invention is that the prior art has the problems of high energy consumption and high production cost, and a new method for fatty acid decarboxylation is provided
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[0027] The preparation method of nano zirconia provided by the invention, the specific steps are as follows:
[0028] a) dissolving the zirconium salt in water to form a solution, preferably at least one of zirconium nitrate, zirconyl nitrate, zirconium oxychloride and zirconium chloride;
[0029] b) adding alkali solution under stirring until the specified pH value is reached, and the pH value at the end point is in the range of 7-12;
[0030] c) Adjust the ambient temperature to 0-150°C, add a reflux device to reflux the precipitate in the alkaline solution for 1-60 hours, and keep the pH value of the mother liquor constant during the entire reflux process;
[0031] d) Filtrating and washing the precipitate until free of impurity ions, drying and roasting. The drying temperature is 60-150°C, the drying time is 4-48 hours, the roasting temperature is 200-800°C, and the roasting time is 1-12 hours.
Embodiment 1～4
[0034] Dissolve zirconium nitrate, zirconium oxychloride, oxynitrate and zirconium chloride in deionized water to make 0.5mol L -1 solution, turn on the stirring, add concentrated ammonia water (mass fraction 37%) dropwise at a stirring speed of 300rpm to pH=9, add a reflux device, raise the solution temperature to 100°C, and reflux for 48 hours. Filter and wash the precipitate until there are no impurity ions, dry at 120°C, and bake at 500°C for 4 hours to obtain nano-zirconia. Its structural characterization is shown in Table 1.
Embodiment 5～6
[0036] Dissolve zirconium oxychloride in deionized water to make 0.5mol L -1 solution, turn on the stirring, and add NaOH (2mol L) dropwise at a stirring speed of 300rpm -1 ) and KOH (2mol L -1 ) solution to pH=9, add a reflux device, increase the solution temperature to 100°C, and reflux for 48 hours. Filter and wash the precipitate until there are no impurity ions, dry at 120°C, and bake at 500°C for 4 hours to obtain nano-zirconia. Its structural characterization is shown in Table 1.
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Abstract
The invention relates to a method for decarboxylation of fatty acid, which mainly solves the problems of high energy consumption and high production cost in the prior art. The present invention is by adopting and including under non-hydrogen condition, fatty acid is contacted with catalyzer in fixed-bed reactor and generates C 12‑ C 18 The step of long-chain alkanes; the catalyst includes a) 0.1 to 5% by weight of at least one active component selected from Pt, Pd and Ru; and b) 95 to 99.9% by weight of the carrier; the carrier is a nano Zirconia, having a specific surface area greater than 100 cm 2 The technical solution per gram solves this problem well, and can be used for fatty acid decarboxylation to prepare C 12‑ C 18 In the industrial production of long chain alkanes.
Description
technical field [0001] The invention relates to a method for decarboxylation of fatty acid. Background technique [0002] The energy structure of today's world is mainly composed of fossil energy represented by coal, oil and natural gas. It takes millions of years for these fossil energy sources to form, and they are basically non-renewable energy sources. At the same time, the use of fossil energy has also brought about many practical problems. On the one hand, fossil energy will inevitably contain a small amount of S, N and other elements, which will generate sulfur oxides and nitrogen oxides that are harmful to the environment after combustion; Bring about the global greenhouse effect. Therefore, at the Copenhagen Conference in 2009, representatives of various countries committed to significantly reducing CO2 from 2012 to 2020. 2 emission. [0003] Bioenergy to CO 2 Mitigation provides a possible pathway, biomass to CO 2 It grows as the basic raw material, and afte...
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