초록 ▼

Disclosed are a Mo--Bi--Nb--Te based composite metal oxide; and a process for producing (meth)acrylic acid from at least one reaction material selected from the group consisting of propylene, propane, isobutylene, t-butyl alcohol and methyl-t-butyl ether, wherein the Mo--Bi--Nb--Te based composite m

Disclosed are a Mo--Bi--Nb--Te based composite metal oxide; and a process for producing (meth)acrylic acid from at least one reaction material selected from the group consisting of propylene, propane, isobutylene, t-butyl alcohol and methyl-t-butyl ether, wherein the Mo--Bi--Nb--Te based composite metal oxide is used as a catalyst. Also, disclosed is a process for producing (meth)acrylic acid comprising a first step of producing (meth)acrolein as a main product from at least one reaction material selected from the group consisting of propylene, propane, isobutylene, t-butyl alcohol and methyl-t-butyl ether, and a second step of producing (meth)acrylic acid from the (meth)acrolein, wherein yield of (meth)acrylic acid in the product of the first step is 20 mole % or higher.

대표청구항 ▼

The invention claimed is: 1. A process for producing (meth)acrylic acid comprising a first step of producing (meth)acrolein as a main product from at least one reaction material selected from the group consisting of propylene, propane, isobutylene, t-butyl alcohol and methyl-t-butyl ether, and a se

The invention claimed is: 1. A process for producing (meth)acrylic acid comprising a first step of producing (meth)acrolein as a main product from at least one reaction material selected from the group consisting of propylene, propane, isobutylene, t-butyl alcohol and methyl-t-butyl ether, and a second step of producing (meth)acrylic acid from the (meth)acrolein, wherein yield of (meth)acrylic acid in the product of the first step is 20 mole % or higher. 2. The process according to claim 1, wherein the first-step reaction product includes (meth)acrolein and (meth)acrylic acid in a molar ratio ((meth)acrolein: (meth)acrylic acid) of 8:2˜7:3. 3. The process according to claim 1, wherein a Mo--Bi--Nb--Te based composite metal oxide is used as the first-step catalyst. 4. The process according to claim 3, wherein the Mo--Bi--Nb--Te based composite metal oxide is represented by the following Formula 1: MOa Bib Nbc Ted Ae Bf Cg Dh Ei Fj Ok [Formula 1] Wherein Mo represents molybdenum, Bi represents bismuth, Nb represents niobium, and Te represents tellurium; A is at least one element selected from the group consisting of W, Sb, As, P, Sn and Pb; B is at least one element selected from the group consisting of Fe, Zn, Cr, Mn, Cu, Ru, Pd, and Ag; C is at least one element selected from the group consisting of Co, Cd, Ta, Pt and Ni; D is at least one element selected from the group consisting of Si, Al, Zr, V and Ce; E is at least one element selected from the group consisting of Se, Ga, Ti, Ge, Rh and Au; F is at least one element selected from the group consisting of Na, K, Li, Rb, Cs, Ca, Mg, Sr, and Ba; each of a, b, c, d, e, f, g, h, i, j and k represents the atomic ratio of each element; wherein when a=12, b is 0.01˜20, c is 0.001˜20, d is 0.001˜20, e is 0˜15, f is 0˜20, g is 0˜20, h is 0˜10, i is 0˜10, j is 0˜10, and k is a number defined by the oxidation state of each of the above elements. 5. The process according to claim 1, wherein conversion ratio of(meth)acrolein in the second step is 98%˜100%. 6. The process according to claim 1, wherein the reaction material introduced into the first step comprises at least one reaction material selected from the group consisting of propylene, propane, isobutylene, t-butyl alcohol and methyl-t-butyl ether in a concentration of 7˜10 vol %.