METHOD FOR PRODUCING ONIUM SALT

Japanese Patent JP2010037280

A

To provide a method for producing an onium salt required to have high purity in a high yield by using a small amount of a solvent or without using a solvent.

A synthesized onium salt is melted at a temperature above the melting point or dissolved in a small amount of a solvent and purified by applying a pressure of 50-500 MPa. The production method includes the following steps: (step 1) the synthesis of an onium salt; (step 2) the melting or dissolution of the onium salt; (step 3) the recrystallization of the onium salt by applying high pressure; and (step 4) the filtration of the onium salt crystal while decreasing the pressure.

JP7364462	Method for processing ethylenediamine and high purity ethylenediamine for semiconductor applications
WO/1995/031430	PROCESS AND DEVICE FOR RECOVERING AMINES AND USE OF RESIDUES OBTAINABLE THEREBY
JP2018100221	METHOD FOR PRODUCING ORGANIC COMPOUND SUBSTANTIALLY FREE OF Pd, AND NOVEL METHOD FOR REMOVING Pd FROM ORGANIC COMPOUND USING HYDROGEN GAS

SAITO KOICHI
SEIKE HIDEO
KOBAYASHI HIROYUKI

JP2008202744A

February 18, 2010

August 06, 2008

Click for automatic bibliography generation  

SANYO CHEMICAL IND LTD

C07C209/84; C07C211/63; C07D233/58; C07D487/10; C07F9/54; H01G9/035; H01G11/54; H01G11/62; H01M10/0568

Previous Patent: FLUORENE COMPOUND AND ORGANIC EL ELEMENT PRODUCED BY USING THE SAME

Next Patent: METHOD FOR PRODUCING IMIDAZOLIUM SALT