Scottish ministers have held private meetings with the fracking firm Ineos and Grangemouth executives from China five times in 13 months.
The Ineos refinery at Grangemouth has been condemned for “poor” environmental performance for the second year running.
A £450 million plan by Ineos to develop the Grangemouth petrochemical complex for fracking is facing fierce opposition.
One of the US fracking companies contracted to deliver gas to Scotland has been fined for contaminating the environment, prompting calls for Scotland to ban the industry.
The Grangemouth petrochemical company is pressing ahead with fracking plans despite the Scottish Government's moratorium.