FIELD: chemistry.
SUBSTANCE: method for processing spent molybdenum-aluminium-containing catalyst comprises treating the catalyst with a solution of soda, sintering of catalyst, leaching the cake with water and precipitating calcium molybdate with calcium chloride at pH of 6.5-6.8 and a temperature of 95-100°C. Grinding is carried out before sintering. The ground catalyst is mixed in a 10% strength solution of sodium carbonate at a ratio of T:W=1:2 and the mixture is kept for 2-4 h. Then the mixture is further added to sodium carbonate and sintered. The calcium molybdate obtained after precipitation is treated with a solution of sodium carbonate, calcium molybdate is recovered and repulped in a solution containing an aliphatic monobasic monocarboxylic acid.
EFFECT: increasing the efficiency of the process and the purity of the product obtained.
5 cl, 1 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| PROCESSING METHOD OF WASTE MOLYBDENUM-ALUMINIUM-CONTAINING CATALYST | 2011 |
|
RU2466199C1 |
| METHOD OF PRODUCING MOLYBDENUM OXIDE FROM SPENT MOLYBDENUM-COBALT CATALYSTS ON ALUMINIUM OXIDE SUPPORT | 2024 |
|
RU2838285C1 |
| METHOD FOR PROCESSING SPENT MOLYBDENUM-COBALT-ALUMINUM CONTAINING CATALYST | 2023 |
|
RU2802917C1 |
| METHOD OF PROCESSING ALUMINIUM, COBALT AND MOLYBDENUM CATALYST | 0 |
|
SU704654A1 |
| METHOD OF PROCESSING SULPHIDE AND MIXED MOLYBDENUM-CONTAINING CONCENTRATES | 2019 |
|
RU2703757C1 |
| METHOD FOR PROCESSING OF SULPHIDE AND MIXED MOLYBDENUM-CONTAINING CONCENTRATES | 2013 |
|
RU2536615C1 |
| METHOD OF PROCESSING SULPHIDE AND MIXED MOLYBDENUM-CONTAINING CONCENTRATES FOR EXTRACTION OF MOLYBDENUM AND RHENIUM | 2009 |
|
RU2393253C1 |
| METHOD OF PROCESSING MOLYBDENUM PRODUCTS CONTAINING MOLYBDENUM TRIOXIDE | 0 |
|
SU1733491A1 |
| METHOD FOR REPROCESSING A SPENT MOLYBDENUM- AND TUNGSTEN-CONTAINING CATALYST | 2021 |
|
RU2777315C1 |
| METHOD OF EXTRACTION OF MOLYBDENUM FROM MOLYBDENUM-CONTAINING CINDER | 2005 |
|
RU2296802C1 |
