The founder of Ineos was jeered by striking workers as he visited the Grangemouth oil refinery on the second day of a bitter dispute over pensions.
Employees on the picket line booed and chanted as Jim Ratcliffe left the Scottish site.
The 55-year-old billionaire chairman had travelled to Grangemouth for meetings. His visit came as extra supplies of fuel began arriving in Scotland.
Around 65,000 tonnes of fuel are being shipped in to ease pressure on the forecourts in the wake of the 48-hour walkout.
Workers will return to the plant at on Tuesday although it could take some time for normal operations to resume.
The Unite union has not called for any fresh strikes but says Ineos needs to halt proposed pension changes if talks are to continue.
The two sides held negotiations last week at the conciliation service Acas but they collapsed without agreement.
First Minister Alex Salmond was preparing for a possible meeting with Gordon Brown to discuss the strike. The Prime Minister's spokesman said efforts were being made to arrange a meeting between the two.
Meanwhile, UK Business Secretary John Hutton will visit Scotland on Tuesday. He will meet fuel industry representatives and retailers to discuss the situation and thank them for their work to keep supplies moving.
Mr Hutton insisted both Governments were doing all they could to get Unite and Ineos management back around the negotiating table.
