Acetaldehyde → Ethylene

HRID 596557Notes

Reaction equation

HRID 596557 reaction equation
[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[CH:9](=O)[CH3:10].Cl.[Cl-].[Al+3].[Cl-].[Cl-].S(=O)(=O)(O)O>C1C=CC=CC=1>[CH2:2]([C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1)[CH3:1].[CH2:9]=[CH2:10]

Participants

8

Reactant 5

HCID 177AcetaldehydeHCID 313Hydrochloric AcidHCID 1118Sulfuric AcidHCID 7501StyreneHCID 6451240Aluminum(III) Chloride

Product 2

HCID 6325EthyleneHCID 7500Ethylbenzene

Reagents, catalysts & solvents 1

HCID 241BenzeneSolvent3×

Procedure

The heating medium of the present invention may be prepared according to various methods. For example, benzene and styrene or benzene and acetaldehyde are allowed to react at a comparatively low temperature, using as a catalyst hydrogen chloride, aluminum chloride or concentrated sulfuric acid, followed by neutralization, and the reaction mixture is separated by fractional distillation to obtain the product. However, the practically suitable method for producing the heating medium of the present invention comprises rectifying oily substances by-produced as by-products in the production of ethyl benzene from the reaction between benzene and ethylene, e.g., oily substances obtained as the tower bottom liquid in a distillation tower of polyalkyl benzene, and recovering portions containing 1,1-diphenyl ethane, for example, fractions at 75° to 90° C./1 mm. Hg.

Workup

  1. customThe heating medium of the present invention may be prepared
  2. customto react at a comparatively low temperature
  3. customthe reaction mixture is separated by fractional distillation
  4. customto obtain the product
  5. customHowever, the practically suitable method for producing the heating medium of the present invention

Sources & evidence

ORD record
ord-54d82bba1ed5401aa024e7cf0c507b43
Source dataset
uspto-grants-1977_03
Patent number
US04011274

Reaction notes

Loading…