Sources of hydrogen sulfide in the components of atmospheric resid Produced at Kuibyshevsk Refinery Co. are examined. The dependence of its content in atmospheric resid oil the process Parameters Of operation of AVT and visbreaking plants is demonstrated. Possible ways of reducing the hydrogen sulfide content in commercial atmospheric resid are reported. SNPKh-1004 and SNPKh-1050 M neutralizers added to the atmospheric resid bind hydrogen sulfide. They allow producing grade 100 atmospheric resid with a hydrogen sulfide content of less than 2 ppm.