Method for preparing acetic acid through catalytic carbonylation reaction

A technology of carbonylation reaction and reaction, which is applied in the field of preparing acetic acid by catalytic carbonylation reaction, can solve the problems of poor stability of rhodium catalyst, short oxidation time of product potassium permanganate, low reactivity, etc.
CN103012103AActive Publication Date: 2013-04-03SHANGHAI HUAYI GRP CO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI HUAYI GRP CO
Publication Date
2013-04-03

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Abstract

The invention relates to a method for preparing acetic acid through a catalytic carbonylation reaction, and mainly solves the problems of low stability of rhodium catalyst under the low water condition, low reaction activity when producing the acetic acid through low-water carbonylation, and short product oxidization time. Methanol or derivative of the methanol is adopted as a raw material, and is carbonylated with a liquid reaction composition to synthesize acetic acid; the reaction composition comprises the rhodium catalyst, a halogen promoter, methyl acetate, the acetic acid, water, a iodide-salt cocatalyst and a ruthenium complex used as a stabilizing agent, wherein the ruthenium complex is selected from at least one of [Ru(Co)aIb]n, Mn<+>[Ru(CO)aIb]<->n or Mn<+>[RuIb]<->n. The technical scheme solves the problems better, and can be applied in the industrial production of preparing the acetic acid through the catalytic carbonylation reaction.
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Description

technical field

[0001] The invention relates to a method for preparing acetic acid by catalyzing carbonylation reaction, in particular to a method for producing acetic acid by low-water carbonylation using ruthenium complex as a catalyst stabilizer. Background technique

[0002] Acetic acid is an environmentally friendly organic acid and an important chemical intermediate and solvent for chemical reactions, from which hundreds of downstream products can be derived, such as vinyl acetate monomer, cellulose acetate, acetic anhydride, acetate, chloroacetic acid, Terephthalic acid, polyvinyl alcohol and metal acetate are widely used in the synthesis of medicine, synthetic fibers, light industry, textiles, leather, pesticides, explosives, rubber and metal processing, food and fine organic chemicals.

[0003] The continuous production of acetic acid by the carbonylation reaction of methanol or methyl acetate with carbon monoxide is the most important method for producing acetic ac...

Claims

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