1、 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2009 by Navistar, Inc. AUGUST 2009 Page 1 of 1 NAVISTAR, INC. CEMS (CORPORATE ENGINEERING MATERIAL SPECI
2、FICATION) NUMBER: CEMS BT-36 TITLE: Grease Extraction CURRENT ISSUE DATE: August 2009 WRITTEN/REVIEWED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES ISSUE OF: October 2001 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specification may involve h
3、azardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the applicability of regulatory limits prior to use. Change Noti
4、ce: Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive. 1.0 SCOPE This method covers a procedure for separating the petroleum ether insoluble components from a grease. 2.0 APPARATUS 2.1 Balance with a sensitivity of 0.1 gram. 2.2 Beaker, 800 millilite
5、rs. 2.3 Beaker, 300 milliliters (tall form). 2.4 Round bottom flask, 1000 milliliters, s 24/40 2.5 Soxhlet Extraction apparatus, large; top s 55/50, bottom s 24/40 2.6 Extraction condenser, large s 55/50 2.7 Glass-Col heater to fit 1000 milliliter round bottom flask. 2.8 Graduated cylinder, 500 mill
6、iliters. 2.9 Stirrer, magnetic. 2.10 Oven capable of maintaining 210 5 F (99 3 C). 3.0 MATERIAL 3.1 Petroleum ether, 30-60 C, ACS. 3.2 Whatman Extraction Thimble, 43 x 123 mm. 4.0 PROCEDURE 4.1 Set up apparatus as in Figure above. Soxhlet Extraction Apparatus 4.2 Weight out 100 5 grams of sample int
7、o a tared extraction thimble. 4.3 Add 400 milliliters of petroleum ether to the flask and reflux at a rate such that the maximum extractant level in the thimble is between the top of the grease and the top of the thimble. Stir continually. 4.4 Extract for four hours after the petroleum ether in the
8、extraction tube appears colorless or unchanged. 4.5 Pour the contents of the flask and extraction tube and two 25 milliliter washings of each into an 800 milliliter beaker. Carefully evaporate off the petroleum ether on a steam plate in a hood and save the remaining fluid for further tests. CAUTION:
9、 Extra care should be taken as petroleum ether is extremely flammable. 4.6 Place the thimble in a 300 milliliter beaker and carefully evaporate on steam bath in hood until all traces of petroleum ether have disappeared. 4.7 Dry the thimble in an oven at 210 5 F (99 3 C) for one hour. Cool and weigh to nearest 0.1 gram. 5.0 REPORT Calculation: % Petroleum ether insoluble = Weight of petroleum insoluble x 100 Weight of sample
