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Cathay Industrial Biotech Ltd patents (2017 archive)


Recent patent applications related to Cathay Industrial Biotech Ltd. Cathay Industrial Biotech Ltd is listed as an Agent/Assignee. Note: Cathay Industrial Biotech Ltd may have other listings under different names/spellings. We're not affiliated with Cathay Industrial Biotech Ltd, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "C" | Cathay Industrial Biotech Ltd-related inventors


Nylon salt and preparation method therefor

The present invention provides a method for preparing nylon salt, which comprises mixing 1,5-pentanediamine, water and dicarboxylic acid at a temperature of 65 to 120° c. To obtain a nylon salt, wherein the amount of the water is 2% to 12% by weight based on the total weight of the 1,5-pentanediamine and the dicarboxylic acid. ... Cathay Industrial Biotech Ltd

Purification of cadaverine using high boiling point solvent

One aspect of the invention relates to a method for the purification of cadaverine from an aqueous cadaverine composition comprising one or more involatile impurities, the method comprising: a) distilling or evaporating the aqueous cadaverine composition wherein one or more solvents are added to the evaporation/distillation system before the evaporation/distillation starts, during the evaporation/distillation and/or after the evaporation/distillation substantially stops when no more evaporation/distillation is observed to produce purified cadaverine, wherein the evaporation or distillation is done at a heating temperature of about 80° c. To about 180° c. ... Cathay Industrial Biotech Ltd

Purification of cadaverine using high boiling point solvent

The present invention relates to a method for the purification of cadaverine from an aqueous cadaverine salt composition comprising one or more involatile impurities, the method comprising: (1) mixing the aqueous cadaverine salt composition with one or more bases selected from the group consisting of ca(oh)2, mg(oh)2, cao and mgo to provide an aqueous cadaverine composition; and (2) distilling or evaporating the aqueous cadaverine composition to produce purified cadaverine; wherein one or more solvents are added to the evaporation/distillation system before the evaporation/distillation stops, and the one or more solvents comprise at least one or more high boiling point (hbp) solvents.. . ... Cathay Industrial Biotech Ltd

Preparation of cadaverine

The invention relates to a method for preparing cadaverine comprising: (1) obtaining an aqueous cadaverine salt composition from a fermentation system; (2) adjusting the ph of the aqueous cadaverine salt composition to a ph of at least about 12 by adding an inorganic base composition to provide a first composition comprising an aqueous cadaverine composition having a ph of at least about 12 and a solid composition comprising one or more alkali metal sulfates; (3) subjecting the first composition to solid-liquid separation without organic solvent extraction to provide the aqueous cadaverine composition and the solid composition; (4) distilling or evaporating the aqueous cadaverine composition of step (3) without organic solvent extraction to provide purified cadaverine; (5) preparing a saturated solution of the alkali metal sulfate(s) from the solid composition of step (3) at a temperature of about 35-40° c., mixing the saturated solution with nh4hco3, and subjecting the mixture to solid-liquid separation to provide solution (i) and solid (i); (6) adjusting the temperature of solution (i) to about 60-80° c., and obtaining solution (ii) and solid (ii) after solid-liquid separation; (7) concentrating solution (ii) and obtaining solution (iii) and solid (iii) after solid-liquid separation; and (8) adding solid (iii) back to the fermentation system of step (1); wherein steps (1) to (8) are optionally repeated one or more times.. . ... Cathay Industrial Biotech Ltd








ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009



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