Formaldehyde → HCID 303495, compound

Temperature

100 °C

162.2 grams of a 37% by weight aqueous solution of formaldehyde (equivalent to 2 moles), 404 grams of n-dodecyl mercaptan (equivalent to 2 moles) and 250 milliliters of hexane were placed in a one liter flask equipped with an overhead azeotropic mixture condenser and a condensed water and hexane component separator. A fixed bed of Amberlyst 15 acid-type ion exchange resin catalyst was provided, and the reaction mixture in the flask was circulated by a pump from the flask through the catalyst bed and back to the flask at a rate of about 2 milliliters per minute for a time period of 4 hours. While the reaction mixture was being circulated through the catalyst bed, it was heated to a temperature of approximately 100° C. whereby the azeotropic mixture formed by the hexane and water in the flask was vaporized, withdrawn from the flask and condensed. The water component of the condensed azeotropic mixture was separated from the hexane component and withdrawn, and the hexane was returned to the reaction flask. A 91.8% yield of dodecyl hydroxymethyl sulfide was realized after the hexane was removed by vacuum evaporation.

1. customequipped with an overhead azeotropic mixture condenser
2. customA fixed bed of Amberlyst 15 acid-type ion exchange resin catalyst was provided
3. customwas circulated by a pump from the flask through the catalyst bed and back to the flask at a rate of about 2 milliliters per minute for a time period of 4 hours
4. customwithdrawn from the flask and condensed
5. customThe water component of the condensed azeotropic mixture was separated from the hexane component
6. customwithdrawn

ORD record

ord-54783a2941b94eb69576a257e6083c2a

Source dataset

uspto-grants-1991_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05053549