| 1 | The direct oxidization directly is forming 2,2-dimethylolbutyraldehyde by anode; | |
| 2 | Production techniques and market of propionic aldehyde and propionic acid and propanol are introduced in this paper. | |
| 3 | Using acrolein as starting material by hydration , the processes for synthetizing 3-hydroxypropionaldehyde were introduced. | |
| 4 | The preparation of 2,2-dimethyl-3-hydroxy propanal from the condensation of formaldehyde and i-butyraldehyde by using triethylamine as catalyst was studied. | |
| 5 | Recent development in hydroformylation of ethene to propanal by catalytic synthesis is introduced in this paper. |