Flash still

• US 3,105,021 A
• Filed: 08/01/1960
• Issued: 09/24/1963
• Est. Priority Date: 08/01/1960
• Status: Expired due to Term

• Current Assignee: Max Randall
• Original Assignee: Max Randall
• Inventors: MAX RANDALL
• Application Number:
  US04/046,696
• Time in Patent Office: 1,149 Days
• US Class Current: 202/237
• CPC Class Codes: B01D 3/06 Flash distillation
• CPC Class Codes: B01D 3/42 Regulation; Control

Claims

1. A FLASH STILL FOR RECOVERY OF PURE SOLVENTS FROM SOLVENTS CONTAMINATED WITH A SOLID LIQUIFIABLE MATERIAL, SAID STILL COMPRISING A HEATER, A CONTAMINATED SOLVENT TANK, A TRANSFER PUMP TO DELIVER THE CONTAMINATED SOLVENTS TO MATERIALS, AND A CATCH-POT TO RECEIVE SAID CONTAMINATING THE CONTAMINATED SOLVENT TANK, A DISTILLATION VESSEL CONNECTED TO RECEIVE MATERIAL FROM SAID CONTAMINATED SOLVENT TANK AND CONTAINING A TEMPERATURE-CONTROLLED HOT LIQUID BATH IN WHICH ARE LOCATED A CYCLONE SEPARATOR, A COIL WITH A PREHEATING SECTION AND A FLASHING SECTION OF LARGER DIAMETER THAN SAID PREHEATING SECTION TO VAPORIZE THE CONTAMINATED SOLVENT AND CARRY THE VAPORS THEREOF TO SAID CYCLONE SEPARATOR, SAID CYCLONE SEPARATOR ACTING TO SEPARATE PURIFIED SOLVENT VAPOR FROM CONTAMINATING MATERIALS FROM SAID CYCLONE SEPARATOR, THE TEMPERATURE OF SAID HOT BATH BEING MAINTAINED BY CIRCULATING THE LIQUID BETWEEN THE DISTILLATION VESSEL AND THE SAID HEATER, SAID TRANSFER PUMP BEING INTERLOCKED WITH AN OIL TEMPERATURE MEASURING MEANS SO THAT THE TRANSFER PUMP WILL NOT OPERATE UNTIL THE OIL HAS REACHED THE DESIRED TEMPERATURE, SAID HOT BATH ACTING TO KEEP SAID CONTAMINATING MATERIALS IN LIQUID CONDITION FOR EASY REMOVAL, AND A CONDENSER CONNECTED TO RECEIVE SOLVENT VAPORS FROM SAID CYCLONE SEPARATOR AND ACTING TO LIQUIFY SAID PURIFIED SOLVENT VAPOR.