FIELD: hydrogenation-dehydrogenation catalysts.
SUBSTANCE: method comprises: (i) treating polymeric glue containing unsaturated polymer, in inert water-immiscible liquid, with hydrogen source in presence of hydrogenation catalyst; (ii) contacting polymeric glue from stage (i) with one or several aqueous solutions of a weak acid having pKa 1.5 and higher (25ºC); (ii) contacting polymeric glue from stage (ii) with one or several aqueous solutions of a weak base having pKa 10.5 or lower; and (iv) recovering hydrogenated polymer.
EFFECT: enabled preparation of essentially colorless hydrogenated polymers.
11 cl, 1 tbl, 7 ex
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| CONJUGATED DIENE BLOCK COPOLYMERS, METHOD OF PREPARATION THEREOF, AND COATING COMPOSITION | 1993 |
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| LINEAR AND BRANCHED BLOCK-COPOLYMERS AND A METHOD OF THEIR SYNTHESIS | 1993 |
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RU2079511C1 |
| LINEAR BLOCK COPOLYMERS | 1992 |
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| POLYDEXTROSE, METHOD OF ITS SYNTHESIS AND SWEET FOOD PRODUCT | 1993 |
|
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| SULPHONATED BLOCK-COPOLYMERS, SYNTHESIS METHOD THEREOF AND DIFFERENT APPLICATIONS OF SAID BLOCK-COPOLYMERS | 2006 |
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RU2425060C2 |
| SULPHONATED BLOCK COPOLYMERS, SYNTHESIS METHOD THEREOF AND DIFFERENT APPLICATIONS OF SAID BLOCK COPOLYMERS | 2006 |
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RU2404998C2 |
