Catalysis system for synthesis of acetic acid by using carbonylation and application thereof
A catalytic system and chemical synthesis technology, applied in the preparation of carboxylic acid by carbon monoxide reaction, organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, etc.
Active Publication Date: 2013-03-06
SHANGHAI HUAYI ENERGY CHEM
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to provide a catalytic system and its application for carbonylation to synthesize acetic acid. The catalytic system is an iridium catalytic system promoted and stabilized by phosphorus-containing oxo-acid salts, which can improve the stability of the catalyst. and activity, the catalytic system can slow down the influence of corroded metals on the reaction in the prior art and the defects of expensive metal promoters such as ruthenium and platinum
Method used
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Embodiment A
[0038] Add IrCl to a 250ml zirconium autoclave equipped with a pressure gauge under air atmosphere 3 ·3H2 0409mg, methyl iodide 10g, distilled water 7.5g, methyl acetate 37.5g, all the other are acetic acid solvent 69.6g, keep reaction temperature 190 ℃, reaction pressure 30bar, calculate the reaction rate when methyl acetate weight ratio is 20% in the reaction solution, The results are listed in Table 1.
Embodiment 1
[0040] In addition to adding Mn(H 2 PO 4 ) 2 2H 2 O462mg, RhI 3 In addition to 135mg, repeat experiment A, the reaction rate when calculating the reaction solution methyl acetate weight ratio is 20%, the results are shown in Table 1.
Embodiment 2
[0042] In addition to adding Mn(H 2 PO 4 ) 2 2H 2 In addition to 0116mg, repeat experiment A, the reaction rate when calculating the reaction solution methyl acetate weight ratio is 20%, the results are shown in Table 1.
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The invention relates to a homogeneous catalysis system and discloses a catalysis system for the synthesis of an acetic acid by using carbonylation and application thereof. The catalysis system comprises an iridium carbonylated catalyst, a methyl iodide serving as a cocatalyst and a phosphorus oxysalt. Because the catalysis system is added with the phosphorus oxysalt, the catalyst has relatively good activity and stability and can reduce the influences of a corroding metal on the reactivity.
Description
[0001] technical field [0002] The invention relates to a homogeneous catalytic system for synthesizing acetic acid, in particular to a catalytic system for carbonylation of acetic acid. The invention also relates to the application of the catalytic system in the carbonylation of methanol or / and its derivatives to acetic acid. Background technique [0003] The methods of rhodium-based and iridium-based catalyzed carbonylation of methanol to acetic acid are known, and both are useful examples for industrial production. Due to the increasing price of rhodium metal, iridium metal has a cost advantage as a catalyst. As early as 1968, Monsanto applied for a patent CA837644A on iridium-based carbonylation catalysts, disclosing an iridium-based carbonylation catalyst for the production of carboxylic acids and esters by the reaction of alcohols and CO at 50-300 °C. The catalyst uses Br 2 , I 2 Or its compound as a promoter, the iridium compound can be halide, carbonyl halide or ar...
Claims
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IPC IPC(8): B01J31/02B01J31/28C07C51/12C07C53/08
CPCY02P20/582
Inventor 赖春波赵兵兵山炜巍王群李俊岭
Owner SHANGHAI HUAYI ENERGY CHEM