A7 Test Method For Verification Of Reflux Dividing Valves

A7.1.1 This test method is for determining whether a liquid reflux dividing valve produces the prescribed reflux ratio. A7.2.1 A hydrocarbon distillate of medium density is introduced to the reflux dividing valve while operating in the normal way. The reflux ratio is determined by the ratio of the two streams so obtained. The test is conducted over a range of rates normally encountered in use to ensure that performance is acceptable at all levels. A7.3.1 This test method is intended to ensure...

Cut Temperature C

FIG. 4 Approximate Static Holdup for Average Crude Oil Using 4 mm Propak in a 25-mm ID x 570-mm Column 12.4 Make plots of the temperature in degrees Celsius AET as the ordinate y-axis versus the percentage mass and volume distilled as the abscissa x-axis . These are the final TBP distillation curves. 13.1 The precision of this method as determined by the statistical examination of interlaboratory test results is described as follows. 13.2 Repeatability The difference between successive results...

A8 Practice For Conversion Of Observed Vapor Temperature To Atmospheric Equivalent

A8.1.1 This practice is for conversion of the actual distillation temperature obtained at sub-ambient pressure to AET corresponding to the equivalent boiling point at atmospheric pressure, 101.3 kPa 760 mm Hg , by means of equations derived by Maxwell and Bonnell.10 A8.2.1 Final data on atmospheric equivalent temperatures are to be obtained by computation. Tables 3-5 are provided only as a guide in estimating the AET during distillation. A8.3.1 Convert observed vapor temperature to atmospheric...

A4 Test Method For The Verification Of Temperature Sensor Location

A4.1.1 This test method is for determining whether the temperature sensor is in the proper position for optimum performance. A4.2.1 The vapor temperature of a pure compound measured by the sensor and its recording instrument is compared to the accepted boiling point for the compound. The test is conducted both at atmospheric pressure and under vacuum of 0.133 kPa 1 mm Hg . A4.3.1 A poorly positioned sensor can give temperatures that are in error due to inadequate heat supply from the vapors. It...

A6 Practice For Calibration Of Sensors

A6.1.1 This practice deals with the basic calibration of temperature sensors and vacuum sensors and their associated recording instruments. A6.1.2 The temperature sensor and its associated instrument are calibrated by observing and recording the temperatures of the melting point and boiling point of pure compounds or eutectic mixtures. A6.1.3 The vacuum sensor and its associated instrument are calibrated against a McLeod gage. A6.2.1 Apparatus A suitable apparatus is shown in Fig. A6.1. For the...

A3 Test Method For The Determination Of The Heat Loss In A Distillation Column

A3.1.1 This test method is for determining the heat loss of a distillation column under static conditions when a temperature differential exists between the inner and outer walls of a distillation column. A3.2.1 The outer wall of the column vacuum jacket is maintained at an elevated constant temperature. The temperature increase inside the column, as recorded by the sensor in the reflux divider, is a measure of the heat gained and thus heat lost by the column. A3.3.1 It is important to have an...

A2 Test Method For The Determination Of The Dynamic Holdup Of A Distillation Column

A2.1.1 This test method is for determining the dynamic holdup of a distillation column using a test mixture of stearic acid in n-heptane. A2.2.1 A test mixture, composed of stearic acid in n-heptane, is distilled under total reflux conditions. From the difference in concentration of stearic acid in the initial mixture and in the mixture during refluxing, the dynamic holdup of the column is calculated. A2.3.1 The amount of sample charged to a particular distillation column must be of such a size...

Tbp Distillation

Tbp Distillation

Analytical Chemistry, Vol 27, 1955, p. 1798. B Struck, R. T. and Kinner, C. R. IndustrialandEngineering Chemistry, Vol 42 , 1950, p. 77. C Cannon , M. R. Industrial and Engineering Chemistry, Vol 41, No. 9, 1949, p. 1953. D Bulletin 23, Scientific Development Co. P.O. Box 795, State College, PA 16801. ECooke, G. M. Analytical Chemistry, Vol 39, 1967, p. 286. FBulletin of Podbielniak Div. of Reliance Glass Works, P.O. Box 825, Bensenville, IL 60106. G Feldman,...

A1 Test Method For The Determination Of The Efficiency Of A Distillation Column

Reflux Apparatus And Moisture Trap

A1.1.1 This test method is for determining the efficiency of a distillation column, under total reflux conditions using the test mixture n-heptane methylcyclohexane at atmospheric pressure. A1.1.2 The efficiency is not measured under vacuum conditions because there is no satisfactory test mixture that has a constant relative volatility with pressure. A1.2.1 The efficiency of the distillation column must be between 14 and 18 theoretical plates to be used in Test Method D 2892 see 6.1.3.2 ....

Distillation of Crude Petroleum 15Theoretical Plate Column1

This standard is issued under the fixed designation D 2892 the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. 1.1 This test method covers the procedure for the distillation of stabilized crude petroleum2 to a final cut temperature of 400 C...