Patents by Inventor Nianshou Tian

Nianshou Tian has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Composition comprising 6-methyl-3,4dihydro-1,2,3-oxathiazin-4-one-2,2-dioxide, its salts, preparation thereof and uses therefor
    Patent number: 6727359
    Abstract: Acesulfame-K is a widely used sweetener in food and beverage. It is prepared by using the substituted sodium phenoxide or substituted phenol as the starting substance to synthesize the following three intermediates: a substituted phenoxide sulfonylchloride(I), a substituted phenoxide sulfonylamide(II) and an acetoacetamide-N-sulfonyl-substituted phenoxide(III). Particularly, II was prepared by using the liquid or gaseous ammonia to react with I under the action of some catalysts in a reaction column. III was prepared by using II to react with diketene. Acesulfame-K was prepared by ring-closure in III with methanol solution of KOH or K2CO3.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: April 27, 2004
    Assignee: BDL Corporation
    Inventors: Nianshou Tian, Haiming Liu
  • Composition comprising 6-methyl-3,4dihydro-1,2,3-oxathiazin-4-one-2,2-dioxide, its salts, preparation thereof and uses therefor
    Publication number: 20030065172
    Abstract: Acesulfame-K is a widely used sweetener in food and beverage. It is prepared by using the substituted sodium phenoxide or substituted phenol as the starting substance to synthesize the following three intermediates: a substituted phenoxide sulfonylchloride(I), a substituted phenoxide sulfonylamide(II) and an acetoacetamide-N-sulfonyl-substituted phenoxide(III). Particularly, II was prepared by using the liquid or gaseous ammonia to react with I under the action of some catalysts in a reaction column. III was prepared by using II to react with diketene. Acesulfame-K was prepared by ring-closure in III with methanol solution of KOH or K2CO3.
    Type: Application
    Filed: July 25, 2002
    Publication date: April 3, 2003
    Inventors: Nianshou Tian, Haiming Liu