Patents Assigned to Hardwicke Chemical Company
  • Process for preparing 3-phenoxybenzaldehydes
    Patent number: 4691033
    Abstract: 3-Phenoxybenzaldehyde acetals can be prepared by reacting a 3-bromobenzalkehyde acetal with an alkali metal phenolate at a temperature of about 130.degree.-165.degree. C. in the presence of a copper catalyst and a phenol as the sole solvent. The product acetals can be converted to the corresponding 3-phenoxybenzaldehydes by hydrolysis.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: September 1, 1987
    Assignee: Hardwicke Chemical Company
    Inventor: James E. Hardwicke, III
  • Preparation of substituted benzaldehydes
    Patent number: 4585898
    Abstract: 3-Bromobenzaldehydes are prepared by reacting a benzaldehyde having a free 3-position with bromine chloride in the presence of aluminum chloride and a small amount of dibromomethane.
    Type: Grant
    Filed: December 18, 1984
    Date of Patent: April 29, 1986
    Assignee: Hardwicke Chemical Company
    Inventors: Roland L. Lau, John S. Hudson