close to room temperature stir the reactants for 5 minutes and then heat the reaction to 80 u00b0 c for half an hour cool the reactants to 45 u00b0 c add 216 parts of 100 p pale oil plus 115 parts of methanol and 105 parts of ca oh 2 stop the nitrogen gas and stir for one hour at 55 u00b0 57 u00b0 c maintain the temperature and start co 2 bubbling at an appropriate rate between about 200 300 ml min for approximately 77 minutes an appropriate rate of co 2 flow is one which permits attainment of the desired ration of co 2 reacted with metal base as reflected by tbn and quantitative analysis for co 2 filter the crude product and then strip the solvent at approximately 100 u00b0 c under vacuum the pale oil is hydrofinished pale stock 100 sus at 40 u00b0 c contains 100 percent solvent dewaxed heavy paraffinic petroleum distillates and is commercially available from texaco inc the scl 2 reagent employed was a technical grade obtained from aldrich chemical co cat no 33 032 9 containing approximately 80 weight percent scl 2 the major impurity being s 2 cl 2 the co 2 flow rate employed.