IT IS WORTHWHILE TO MENTION THAT CHEMICAL EXTRACTION AND SEPARATION INSTRUMENT WITH FIXED THERMOSTATIC CONTROL (MODIFIED INSTRUMENT) DESCRIBED BY:1.EXTRACTION AND SEPARATION DIFFERENT CHEMICAL COMPOUNDS (ORGANIC AND INORGANIC ) BY USING NEW PRECISION HEATING CONTROL SYSTEM WHICH GIVE HIGH EXTRACTION AND SEPARATION PURITY DEGREE IN ONE STEP, SO THIS INSTRUMENT DECLINE AND REDUCE THE TIME, ENERGY, COST AND HUMAN EFFORT.2. THE TEMPERATURE OF MODIFIED INSTRUMENT RANGED FROM 30-110 ْ C WITH HIGH ACCURACY.3. THE DESIGN OF THIS INSTRUMENT ADDING AND CHANGE THE INSULATION SYSTEM IN UNMODIFIED INSTRUMENT BY USING NEW INSULATION MATERIALS SUCH AS FIBER GLASS AND ASBESTOS PLATE. ON THE OTHER HAND THE CURRENT INVENTION IS RELATED TO A MODIFIED LAB INSTRUMENT FOR EXTRACTION AND SEPARATION OF CHEMICAL COMPOUNDS WITH HIGH DEGREE OF ACCURACY WHICH DUE TO VERY LOW IMPURITIES IN THE FINAL STEP WHICH WILL REDUCE THE FOLLOWING STEPS FOR HIGH DEGREE OF PURIFICATION. THE NOVEL DEVICE IS MODIFIED BY ADDING A TEMPERATURE CONTROL UNIT WITH 10 ْ C PRECISION ON THE SCALE. ON THE OTHER HAND, EACH EXTRACTION UNIT IS INSULATED INDIVIDUALLY BY USING FIBER GLASS AND ASEPESTIUS PLATE FOR COMPLETE ISOLATION. THE SUBJECT MATER OF THE CURRENT INVENTION CAN BE USE IN EITHER LAB OR COMMERCIAL SCALE OF EXTRACTION AND SEPARATION