Low water diamine-dicarboxylic acid salt preparation

Details Low water diamine-dicarboxylic acid salt preparation Low water diamine-dicarboxylic acid salt preparation

1997-03-07

1998-09-01

Geist, Gary

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

564468, 528335, 528332, 528336, 528310, 528322, C07C 5500, C07C20900, C08G 6926

Patent

active

058012788

ABSTRACT:
The invention provides a process for directly manufacturing a diamine/dicarboxylic acid salt with a low water content. The process includes reacting a diamine with a dicarboxylic acid to form a diamine/dicarboxylic acid salt. The reaction of the diamine and the dicarboxylic acid is carried out in the presence of about 0.5% to about 25% by weight water, based on the weight of the reaction mixture, while providing conditions in the reaction mixture such that the reaction mixture is in substantially solid particulate form.

REFERENCES:
patent: 4442260 (1984-04-01), Larsen
patent: 4925914 (1990-05-01), Dolden et al.
patent: 4933192 (1990-06-01), Darling et al.

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