Processes for removing carbon disulfide from symmetrical and asymmetrical sulfide product streams

A mercaptan and sulfide production system comprising:

• (a) a mercaptan synthesis unit configured to produce a reaction mixture containing a mercaptan compound and a sulfide compound from an alcohol feed stream and a H2S feed stream;
• (b) a product purification and fractionation unit configured to isolate a mercaptan product stream and a sulfide product stream from the reaction mixture, the sulfide product stream comprising the sulfide compound and CS2;
• (c) a distillation tower configured to separate at least a portion of a higher boiling point product from the sulfide compound in the sulfide product stream to form a purified sulfide stream containing 100 ppm or less CS2 exiting a top of the distillation tower;
• and
• (d)(1) a first inlet for introducing the sulfide product stream and a second inlet for introducing an alkanolamine into the distillation tower, wherein the distillation tower is further configured to contact the alkanolamine with the sulfide product stream to convert at least a portion of the CS2 in the sulfide product stream to the higher boiling point product, or
• (d)(2) a distillation tower inlet configured to introduce a mixed stream of an alkanolamine and the sulfide product stream into the distillation tower, wherein at least a portion of the CS2 in the sulfide product stream is converted to the higher boiling point product.