The Rajasthan state government has approved a 80-billion rupee refinery that will be India’s third largest to be set up by the Hindustan Petroleum Corp Ltd (HPCL), the Hindustan Times reported (US$1=43 rupees).   The 9 million tonne/year refinery will be built by HPCL subsidiary, Guru Gobind Singh Refinery Ltd.   When completed, it will…