MEASURING METHOD OF DISTILLATION POINT AND MEASURING APPARATUS THEREOF

• Main Authors: SUGIHARA YUZO, HARA MASANORI, NASU EISUKE
• Format: Patent
• Language: English
• Published: 10.04.1989
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PHYSICS; SEPARATION; TESTING; TRANSPORTING

PURPOSE:To measure a distillation temperature in a short time by a method the discharge amount of a distillate part in relation to the total of the discharge amount of a part of not yet distilled and the discharge amount of the distillate part is detected as the distillation rate of a sample, and a sample temperature enabling the maintenance of a liquid level height of a vessel within a prescribed range is detected as the distillation temperature at said distillation rate. CONSTITUTION:When a distillation temperature for a specified distillate amount is measured, the flow ratio between a discharge pipe 38 for a part not yet distilled and a distillate discharge pipe 41 is adjusted in accordance with a distillate amount to be measured. In the state wherein valves 36 and 39 are closed, a sample is introduced from a sample introduction pipe 2 into a hermetically-closed vessel 12 so that it reaches the position of a liquid level height A, and heating is started. Then the liquid level lowers due to distillation. When it lowers to a position B, a valve 31 is opened and the sample is supplemented until the liquid level reaches the position of A. The liquid level in the hermetically-closed vessel 12 is always controlled to be between A and B in this way, and a sample temperature is measured successively. Besides, the liquid level of a fractional distillation vessel 8 is controlled to be between C and D constantly, and the valves 36 and 39 are started simultaneously to discharge the part not yet distilled, in order to fix a fractional distillation rate at this time.