** Johnson Matthey JMAT.L slips 16.2% to 1,929p; top loser on FTSE midcaps .FTMC
** British chemicals firm agrees to sell its catalyst technologies business to Honeywell HON.O at reduced price of 1.33 bln pounds ($1.8 bln) vs previously agreed 1.8 bln pounds
** Extends long stop date for deal to July 21
** Expects to return ~1 billion pounds to shareholders after deal completion vs 1.6 billion pounds originally anticipated
** As of last close, JMAT up ~8% so far this year
($1 = 0.7395 pounds)
(Reporting by Prerna Bedi in Bengaluru)
((Prerna.Bedi@thomsonreuters.com ; +91 98052 24616))