| 摘要 |
<p>Invention relates to the field of industrial organic synthesis, namely to the method of regeneration of SOP catalysts ("silver on the pumice") of the oxidizing conversion of methanol into formaldehyde. The method of regeneration of SOP catalyst SNP of the oxidizing conversion of methanol into the formaldehyde includes treatment of spent catalyst by potassium nitrate, burning of catalyst, washing of introduced compounds of Na, Ca, Fe by solutions of salts and acids, dissolution of silver by nitrate acid and introduction of the reductants of silver. The burning after impregnation of spent catalyst with solution of potassium nitrate is carried out at 350+- 10 DEGREE C during 95+- 2 minutes, thewashing of introduced compounds of Na, Ca, Fe is carried out by a solution of ammonium chloride, and the dissolution of silver is carried out in the nitrate acid with mass fraction 55%, further into the formed solution the dry carbamide is introduced before the complete dissolution, the obtained solution is evaporated at 85+- 5 DEGREE C and the argentums nitrate is reduced to the metallic silver at 330+- 10 DEGREE C.</p> |
