China broker Orient Sec to launch up to $1.15 bln HK offer on Monday-IFR

* Shares to be offered in HK$7.85-HK$9.35 indicative range-IFR * Everbright, China Merchants also plan HK share sales (Adds capital raising by brokerages in Hong Kong, upcoming listings) HONG KONG, June 17 (Reuters) - China's Orient Securities Co plans to launch an up to $1.15 billion share offering in Hong Kong on Monday, IFR reported, in what is expected to be the first of several mainland brokerages lining up to raise funds in the city this year. The deal comes almost a year after a stock mar