Positive-working radiation-sensitive mixture

Details Positive-working radiation-sensitive mixture Positive-working radiation-sensitive mixture

1997-07-29

1998-12-01

Lambkin, Deborah C.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210679, 210685, 210660, B01D 1500, B01J 3900, C02F 142

Patent

active

058433198

ABSTRACT:
A process for producing a solution of a basic or non-basic sulfonium compound (A) of formulae II-V: ##STR1## wherein R.sup.5, R.sup.6 and R.sup.7 each independently represent a C.sub.1 -C.sub.18 alkyl, aryl or heteroaryl group or an aryl group mono-, di- or tri-substituted with an alkyl, an alkylaryl, an aryl, a halogen, an alkoxy, a phenoxy, a thiophenol, a phenylsulfonyl or a phenylsulphenyl;

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patent: 5378802 (1995-01-01), Honda
patent: 5443736 (1995-08-01), Szmanda et al.
J. Khym, "Analytical Ion-Exchange Procedures in Chemistry and Biology" pp. 4, 7, 8, 11, 20, 62, 1974.
J. Dean, "Analytical Chemistry Handbook" pp. 2.59-2.66, 1995.

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