阅读说明：本技术 具有均匀壁厚度的四叶体形式的催化剂成型体 (Shaped catalyst bodies in the form of tetralobes with uniform wall thickness ) 是由 C·瓦尔斯多夫 M·O·肯尼玛 M·D·考夫曼雷丘尔斯基 H·博彻特 于 2019-02-19 设计创作，主要内容包括：本发明涉及具有四个圆形通道的四叶体形式的催化剂成型体,这些通道的中点形成正方形,并且在每种情况下两个相邻通道之间的间距为通道的外壁厚度的0.8至1.2倍,所述成型体用于SO<Sub>2</Sub>氧化成SO<Sub>3</Sub>。(The invention relates to catalyst shaped bodies in the form of quadrulobes having four circular channels, the middle points of which form a square and the spacing between two adjacent channels is in each case 0.8 to 1.2 times the thickness of the outer wall of the channel, for SO 2 By oxidation to SO 3 。)

1. Catalyst shaped body in the form of a tetrafoil having four circular channels, the middle points of which form a square, wherein the spacing E between two adjacent channels is in each case 0.8 to 1.2 times the outer wall thickness B of the channels.

2. Catalyst shaped body according to claim 1, wherein the cross-section of the tetrafoil is formed by four partially overlapping annular rings, the middle points of which lie on a ring line having a diameter y, the four annular rings being defined by an outer ring line having an outer diameter x1 and a concentric inner ring line having an inner diameter x 2.

3. Catalyst shaped body according to claim 1 or 2, wherein the ratio of the diagonal diameter D of the shaped body to the height F of the shaped body is from 0.25 to 2.0.

4. Catalyst shaped body according to claim 3, wherein the ratio of the diagonal diameter D of the shaped body to the height F of the shaped body is from 0.25 to 1.0.

5. Catalyst shaped body according to any one of claims 1 to 4, wherein the diagonal diameter D of the shaped body is from 5 to 80 mm.

6. Catalyst shaped body according to claim 5, wherein the diagonal diameter D of the shaped body is from 10 to 20 mm.

7. Catalyst shaped body according to any of claims 1 to 6, wherein the catalyst shaped body comprises vanadium, at least one alkali metal and a sulphate on a silicate support material.

8. Catalyst shaped body according to any one of claims 1 to 7, obtainable by extrusion of a catalyst precursor composition via an extrusion tool representing the cross-sectional geometry of the catalyst shaped body to form a catalyst precursor shaped body, drying and calcination thereof.

9. Use of a shaped catalyst body as claimed in any of claims 1 to 8 for converting SO₂By oxidation to SO₃The use of (1).

10. Adding SO₂By oxidation to SO₃Process according to (1), wherein a gas mixture comprising oxygen and sulphur dioxide is contacted with a bed of shaped catalyst bodies according to any of claims 1 to 8 at a temperature of 340 to 680 ℃.

Examples