Document MGnB8Gng6bkYMjOOVOnLD1r5k

ArocLor 1242 El It is well known that the working life of a.c. paper The concentration of the additive will be slightly capacitors impregnated with askarels can be extended reduced by a batch treatment process with Fullers' by the addition to the askarel of small amounts of earth or other adsorbent. In order to allow for this suitable epoxy compounds, known as `scavengers'. reduction, the initial concentration of the additive This effect is especially beneficial in the case of has been set at a slightly higher level than would capacitors operating under arduous service condi otherwise be necessary. In this way, after a batch tions, such as those subjected to frequent surges. treatment with an adsorbent of normal activity at a concentration up to about 1% by weight, the final However, some epoxy compounds have been found concentration of the additive will be sufficient to give to be very difficult to control under the practical protection to the capacitors. conditions obtained in existing capacitor impregna tion plants. If the impregnant is purified by percolation through Aroclor 1242 El consists of electrical quality Aroclor 1242 to which a specially purified epoxy compound has been added at just above the concentration a refining column the additive will be initially heavily depleted by the adsorbent. However, the adsorbent later becomes `saturated' with the additive whilst continuing to remove ionic impurities from the at which it will be used. This product has been developed to provide convenient processing in the capacitor impregnation plant as well as sufficient activity to give an effective scavenging action in the impregnant. The volume of impregnant required to saturate the adsorbent depends upon its mass and activity. finished capacitor. The properties of Aroclor 1242 El (see Table 1) are The vapour pressure of the additive itself is very much lower than that of Aroclor 1242 so that the concentration of the additive will not be reduced during the degassing stage of the process when this is the same as those of Aroclor 1242 except for the following: Scavenger Content: equivalent to 1.9 to 2.1 mg HCI/g Dissipation Factor (tan 8) at 100C, 50 Hz: <3% carried out over the usual ranges of temperature and Resistivity at 100 C, 500V, 1 min.: >1 Tncm. pressure. Monsanto The information contained in this publication is. to our best knowledge, accurate; but all recommendations or suggestions are made without guarantee, since the conditions of use are beyond our control. Monsanto Company, its subsidiaries, associates and affiliates disclaim any liability for loss or damage incurred in connection with the use of the following material. Moreover, nothing contained herein is to be construed as a recommendation to use any product in conflict with any patent. The information, recommendations and suggestions made herein are offered in the light of prevailing legislation and on the basis of present scientific information (1972) available to Monsanto. TOWOLDMONOQ23859 Table 1 Aroclor 1242 El. Tentative Data PROPERTY TEST METHOD UNITS Appearance ASTM D 1702 - Colour ASTM D 1702 Density at 20 ' C ASTM D 1810 & ISO/R 649 Refractive Index at 20 C ASTM D 1807 Kinematic Viscosity at 20 C ASTM D 446 Flash Point ASTM D 92 Fire Point ASTM D 92 Pour Point ASTM D 97 APHA g/cm3 -- cSt c C c VALUE clear liquid free from suspended matter and sediment. 50 max. 1,38 to 1,39 1.6250 to 1.6270 55 to 71 153 min. none to boiling point. --18 max. Neutralization No. Inorganic Chlorides Water Content Hydrolyzable Chlorides Scavenger Content Monsanto ASTM D 1821 ISO/R 760 ASTM D 2441 Monsanto (Appendix 1) mg KOH/g ppm ppm ppm mg HCL/g 0.01 max. 0.05 max. 30 max. 1.0 max. 1.9 to 2.1 Volume Resistivity at 100C, 500V, 1 min. Monsanto Dissipation Factor (tan 5) at lOOT, 50 Hz Monsanto Relative Permittivity at 100C, 50 Hz Monsanto T a cm % - > 1 min. < 3 max. 4.7 to 4.9 A suitable method for estimating the scavenger content is given on page 3. It has sometimes been found difficult to clean the dielectric test cells that are used to measure the dissipation factor and resistivity of epoxide-containing askarels. We have found that it is helpful first to standardize the cell with pure Aroclor 1242 whose dis sipation factor is already known. If this measurement is satisfactory, the cell is then rinsed twice with Aroclor 1242 El and the measurement proceeds in the usual way. This product should be treated from the toxicity and safety aspects in the same way as Aroclor 1242 (see Appendix 2). For further information contact Monsanto at 10-18 Victoria Street, London SW1H ONQ, Telephone 222 5678 or at Place Madou 1, 1030 Brussels, Telephone 19.11.01. 2 0151639 TOWOLDMON0023860 Test Method for determining the quantity of hydrogen chloride scavenging additive in Aroclor Storage, Handling and Disposal of Aroclor 1. Principle The method involves titrating the oxirane oxygen in glacial acetic acid with a standard perchloric acid solu tion to a crystal violet end-point. The titration is carried out in an excess of quaternary ammonium bromide, which, on contact with perchloric acid, produces hydro gen bromide. The hydrogen bromide, in turn, reacts with the oxirane oxygen. Caution Aroclor contains Polychlorinated Biphenyls (PCB's) which some studies have shown may be persistent, an environmental contaminant and, possibly, injurious to certain forms of bird, aquatic and animal life. 2. Reagents (a) Glacial acetic acid (b) Chloroform (c) Perchloric acid solution--0.1 N in glacial acetic acid (standardize against potassium hydrogen phthalate). (d) Crystal violet --1 % solution in glacial acetic acid. (e) Tetraethyl ammonium bromide solution--dissolve 100 g in 400 cm3 of glacial acetic acid. 3. Apparatus (a) 10 cm3 burette (b) Usual laboratory glassware Drums Inside storage is recommended to prevent contamination of the product by water. If the drums have to be stored outside they should be stacked on their sides to prevent water accumulating around the bungs and being breathed into the drum during severe ambient temperature changes. Drum storage areas should be organised so that any leakages are collected for safe disposal. Partially emptied drums should not be left open to the air. 4. Procedure Bulk (a) Weigh 2.5 to 3.0 of the askarel to the nearest 0.05 g into a 125 cm3 Erlenmeyer flask. (b) Add 10 cm3 of chloroform, 40 cm3 of glacial acetic acid and 10 cm8 of the tetraethyl ammonium bromide solution and swirl to dissolve. (c) Add 1 drop of crystal violet indicator and titrate with 0.1 N perchloric acid to the greatest colour range (violet to green-blue). 5. Calculation Hydrogen chloride equivalence (mg/g)------^------ The supply of Aroclor in bulk tank car loads, offers many advantages to medium and large volume users, compared with drum deliveries. Unloading, storing and transferring to the production unit is safer, easier, faster and cheaper. Material losses due to spillage and incomplete emptying of drums are eliminated. The possibility of product contamination during handling is greatly reduced. Even where storage and handling facilities are not at present available, the economics of bulk handling may quickly pay for the tanks and piping systems required. where T- litre of perchloric acid (cm3) N-= normality of perchloric acid W --weight of sample (g) A booklet indicating the type of system necessary fer the efficient handling of Aroclor in bulk is available from Monsanto. 6. Additional Notes (a) The titrant is very stable and does not require frequent restandardization. (b) No blank correction should be required if good quality reagents are used. As soon as a changeover to bulk delivery is contemplated, experienced Monsanto personnel will be available for site discussions regarding the most efficient type of installation for the particular location and an offloading procedure appropriate to that particular installation. 3 0151634 TOWOLDMONOQ23861 Handling Precautions Aroclor drums and containers carry the following label which gives general instructions for handling: IMPORTANT CHLORODIPHENYLS (42%-54%) (or 60%) (PCB) This product contains POLYCHLORINATED BIPHENYLS (PCB's) which some studies have shown may be persistent, an environmental contaminant and, possibly, injurious to certain forms of bird, aquatic and animal life. PREVENT ANY ENTRY INTO THE ENVIRONMENT THROUGH SPILLS, LEAKAGE, DISPOSAL, VAPOURISATION, RE-USE OF CONTAINERS OR OTHERWISE. SPILLS, LEAKAGES AND WASTE PRODUCT MUST BE COLLECTED. Use of this product must be restricted to applications which can be controlled so that entry into the environment does not occur and to applications in which it cannot come into contact with food, animal feedstuffs or pharmaceuticals. HARMFUL SUBSTANCE IF TAKEN INTERNALLY OR IF IN PROLONGED CONTACT WITH THE SKIN. CAUSES IRRITATION OF SKIN AND EYES. DURING SHIPMENT AVOID SPILLS AND LEAKAGE INTO INLAND WATERWAYS AND THE SEA. Store away from food, animal feedstuffs and pharmaceuticals. Keep container tightly closed. Do not eat or smoke when using. Avoid breathing vapours, mist or fumes. Do not wear contaminated clothing. Wash product from skin with soap and water. Wash eyes by flushing with water. in addition to the foregoing we can add that: 1. Animal toxicity tests (small mammals) indicate that acute oral toxicity is low but that acute dermal toxicity may be moderate. 2. When handling the fluid minimise contact with the skin and wash any off with soap and water. People with sensitive skins should wear gloves resistant to chlorinated solvents or apply a silicone hand cream. 3. Should Aroclor accidentally splash or be rubbed into the eyes, they should be rinsed thoroughly with water for a few minutes. It is suggested that all operators be provided with safety glasses as Aroclor will cause pain if it gets into the eyes. 4. Elementary rules of hygiene should be applied--such as not smoking, eating or drinking during handling and contaminated clothing should be discarded.5 Disposal of empty drums and waste Aroclor Empty drums should not be re-used for anything except scrap Aroclor. Unwanted empty drums should be dis posed of by a specialised waste disposal contractor familiar with PCB's who will crush the drums and bury them on an approved toxic dump in accordance with local regulations. Handling of Aroclor in bulk will minimise the problems associated with handling of drums. Waste Aroclor should be disposed of by special high temperature incineration at 1000C minimum with a residence lime of 1.5 seconds or longer or alternatively by a method conforming to local regulations. Care must be exercised during such disposal and the ultimate use of Aroclor to avoid pollution, particularly of sewers and waterways. 5. Aroclor should be handled at ambient temperatures in well ventilated areas. If hot Aroclor has to be handled, a respirator with an active carbon canister should be worn. Monsanto Chemicals Limited Monsanto Europe S.A. 10-18 Victoria Street Place Madou, 1 London SW1H ONQ B-1030, Brussels, Belgium Telephone: 01-222 5678 Telephone: (02) 19.11.01 Telex: 916093 Telex: 22110/21986 4 015163') Aroclor is a Registered Trade Mark Published by Monsanto Europe S.A. 11 -27(E)M-E-2. (8/73) TOWOLDMONOQ23862