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| Number | Title | Issue Date |
| 4613701 | Recovery of rhodium from hydroformylation reaction product In a hydroformylation process wherein an alpha-alkene of 2 to about 10 carbon atoms is reacted with carbon monoxide and hydrogen in the presence of a rhodium triorganophosphine complex to produce an aldehyde having one carbon atom more than the alkene, th... | 09/23/1986 |
| 4568464 | Anaerobic filter In the operation of a recycling anaerobic filter for treating aqueous waste streams, the rate of production of methane is measured continually at frequent intervals and the COD feed rate is varied to maintain a predetermined, timed, relationship between t... | 02/04/1986 |
| 4393252 | Process for producing ethylene glycol Ethylene glycol is prepared by reacting methanol and an organic peroxide of the formula R--O--O--R1, wherein R and R1 are each an alkyl or aralkyl group having 3 to 12 carbon atoms, in the presence of a minor amount of a basic materi... | 07/12/1983 |
| 4358623 | Process for catalytically converting methanol to formaldehyde In catalytically oxidizing methanol in the vapor phase according to already-known processes for the production of formaldehyde, the hot formaldehyde-containing gaseous effluent of the catalytic converter is rapidly cooled by being passed through the tubes... | 11/09/1982 |
| 4230887 | Recovery of anhydrous acids C2 -C6 monocarboxylic and dicarboxylic acids are scrubbed from gas phase mixtures of such acids and water by gas absorption techniques utilizing a liquid solvent comprising a polyoxyalkylene glycol or a monoalkyl or dialkyl ether the... | 10/28/1980 |
