8/6/2019 10 581 986 Method for Producing Formalde

1/18

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1us 20070142677Al(19) United States(12) Patent Application Publication

Olbert et al.(10) Pub. No.: US 2007/0142677 Al(43) Pub. Date: Jun. 21, 2007

(54) METHOD FOR PRODUCINGFORMALDEHYDE

(76) Inventors: Gerhard Olbert, Dossenheim (DE);Thorsten Johann, Limburgerhof (DE);Markus Weber, Ludwigshafen (DE);Neven Lang, Mannheim (DE);Eckhard Stroefer, Mannheim (DE);Martin Fiene, Niederkirchen (DE);Markus Siegert, Heidelberg (DE)

Correspondence Address:CONNOLLY BOVE LODGE & HUTZ, LLPPO BOX 2207WILMINGTON, DE 19899 (US)

(21) Appl. No.: 10/581,986(22) PCT Filed: Dec. 23, 2004(86) PCTNo.: PCT/EP04/14672

371(c)(I),(2), (4) Date: Jun. 7, 2006

B-.......I

(30) Foreign Application Priority DataDec. 23, 2003 (DE) 10361 517.2

Publication Classification(51) Int. Cl.

C07C 45129 (2006.01)(52) U.S. Cl. 568/487(57) ABSTRACTA process for preparing formaldehyde by gas-phase oxida-tion of methanol vapor by means of a gas stream comprisingmolecular oxygen in the presence of a fixed-bed catalystcomprising iron and molybdenum, wherein the process iscarried out in a reactor (1) having heat-exchange plates (2)which are arranged in the longitudinal direction of thereactor (1) and have a spacing between them and throughwhich a heat transfer medium flows, inlet and outlet facili-ties (3,4) for the heat transfer medium to the heat-exchangeplates (2) and also gaps (5) between heat-exchange plates (2)in which the fixed-bed catalyst is present and into which themethanol vapor and the gas stream comprising molecularoxygen are passed, is described.

A Al__~ ~ ~ - O f - - . - _ J

8/6/2019 10 581 986 Method for Producing Formalde

2/18

Patent Application Publication Jun. 21, 2007 Sheet 1 of 11 US 2007/0142677 Al

FIG.1A 8

2

~~~ ': x ~, 9 < ~ ~~ > < ~> < 'x ~" > < x~ > < x '> < > < > < ~x xt x ~xx x 'x': x x 3;J ')c x ~x ~ ~!Ix ~ > < )< > j: x 9 < I> < ~ 1 1')c- ; : : : : ')c ': x ~ ~ - .

" "~ '> < )< ': x I > -'> < x )< ~