Catalytic solution system for manufacturing terephthalic acid and a method for same
AssigneeMechema Chemicals International Corp.
InventorDavid Yen
Life of this patent
Estimating the term…
Abstract
A catalytic solution system for manufacturing terephthalic acid is disclosed and its method. The system uses a Co—Mn—Br acetate solution (CMB) that is applied in an oxidation reaction, when the weight ratio of each component is (Co %×2.7)+(Mn %×2.9 %)>Br %. CoBr2 and MnBr2 are introduced as a source of Br for the CMB solution. Compensation for any shortage of Co and Mn, after such a supplement, can be made from cobalt acetate and manganese acetate without using highly corrosive HBr. The present invention provides a method of preparing a catalyst for manufacturing terephthalic, wherein, in the stirring action of para-xylene with a gas containing oxygen, the above catalytic solution system is used.
Claims4
A catalytic solution system for manufacturing terephthalic acid, the system comprises:
- a Co—Mn—Br acetate solution for an oxidation reaction, the oxidation reaction consumes Co, Mn, and Br;
- and
- a source of CoBr2 and a source of MnBr2, the source of CoBr2 and a source of MnBr2 solely replenish the Br when a weight ratio of each component is (Co %×2.7)+(Mn %×2.9%)>Br %, and Co and Mn are replenished by cobalt acetate and manganese acetate produced by the Co—Mn—Br acetate solution.
A catalytic solution system for manufacturing terephthalic acid, the system comprises:
- a Co—Mn—Br acetate solution for an oxidation reaction, the oxidation reaction consumes Co, Mn, and Br;
- and
- a source of CoBr2 and a source of MnBr2, the source of CoBr2 and a source of MnBr2 replenish a majority of the Br when a weight ratio of each component is (Co %×2.7)+(Mn %×2.9%)<Br %, and Co and Mn are replenished by cobalt acetate and manganese acetate produced by the Co—Mn—Br acetate solution, a remainder of the consumed Br is replaced by a source of HBr.
A method for maintaining a catalytic solution for manufacturing terephthalic acid, the method comprises:
- conducting an oxidation reaction in a Co—Mn—Br acetate solution wherein the oxidation reaction consumes Co, Mn, and Br;
- and
- replenishing Co, Mn, and Br in the system under one of two conditions,
- a first condition being when a weight ratio of each component is (Co %×2.7)+(Mn %×2.9%)>Br %, the Co and the Mn are replenished by cobalt acetate and manganese acetate produced by the Co—Mn—Br acetate solution and a source of CoBr2 and a source of MnBr2 solely replenish the Br;
- and
- a second condition being when a weight ratio of each component is (Co %×2.7)+(Mn %×2.9%)<Br %, the Co and the Mn are replenished by cobalt acetate and manganese acetate produced by the Co—Mn—Br acetate solution and a source of CoBr2 and a source of MnBr2 replenish a majority of the Br with a remainder of the consumed Br being replaced by a source of HBr.
Dependencies are inferred from the claim text.