Title:
METHOD FOR PRODUCING SPIROGLYCOL
Document Type and Number:
Japanese Patent JP2005187425
Kind Code:
A
Abstract:
To provide a method for improving the thermal stability of a spiroglycol.
A spiroglycol is produced from hydroxypivalaldehyde and pentaerythritol in the presence of an acid catalyst. The produced spiroglycol crystal is separated and washed with a basic solution.
Inventors:
WATANABE MASASHI
AMAMIYA JUNICHI
KUZUHARA IKUTARO
AMAMIYA JUNICHI
KUZUHARA IKUTARO
Application Number:
JP2003433420A
Publication Date:
July 14, 2005
Filing Date:
December 26, 2003
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO
International Classes:
C07D493/10; (IPC1-7): C07D493/10
Domestic Patent References:
| JPH11228577A | 1999-08-24 | |||
| JP2001302672A | 2001-10-31 | |||
| JP2000001490A | 2000-01-07 | |||
| JP2000007681A | 2000-01-11 | |||
| JPH07215980A | 1995-08-15 | |||
| JP2000007680A | 2000-01-11 |
Attorney, Agent or Firm:
Takashi Nagai
Previous Patent: O/W-TYPE EMULSION COMPOSITION
Next Patent: IMMUNOENHANCING COMPOSITION CONTAINING POLY-GAMMA-GLUTAMIC ACID
Next Patent: IMMUNOENHANCING COMPOSITION CONTAINING POLY-GAMMA-GLUTAMIC ACID