Document zQo7Jx3g77ZZ4ojJq79115MNR

/c Jt is well known that the working life of a.c. paper The concentration of the additive ill be slightly capacitors impregnated with askarcls can be extended reduced by a batch treatment process with Fullers' by the addition to the askarcl 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 a refining column the additive will be initially heavily Aroclor 1242 El consists of electrical quality Aroclor 1242 to which a specially purified epoxy compound has been added at just above the concentration at which it will be used. This product has been developed to provide convenient processing in the capacitor impregnation plant as well as sufficient depleted by the adsorbent. However, the adsorbent later becomes `saturated' with the additive whilst continuing to remove ionic impurities from the impregnant. The volume of impregnant required to saturate the adsorbent depends upon its mass and activity. activity to give an effective scavenging action in the finished capacitor. The properties of Aroclor 1242 El (see Table 1) arc 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 (tart 6) at 100C, 50 Hz : < 3% carried out over the usual ranges of temperature and Resistivity at 100C, 500V, 1 min.: >1 Tncm. pressure. Tha information contained in this publication is. to our best knowledge, accurate; but all recommendations or suggestions ere made without guarantee, sir.ee the conditions of use are beyond our control. Monsanto Company, its subs.diaries, associates and affiliates disclaim any liability for loss or damage incurred in connection with the use of the following material. Moroover, rattling coot.lined herein is to be construed as a recommendation tu use any product in conlbci with any patent. The information, recommendations and suggestions made herein arc ottered in tin: light ot prevailing legislation and on the basis ol present scientific information (1972) available to Monsanto. 0151638 TOWOLDMONOQ23863 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 20C 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 100C, 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. Wc 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 0J51639 TOWOLDMONOQ23864 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. Ca tuition Aroclor contains Polychlorinatlp 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 add. 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 (a) Weigh 2.5 to 3.0 of the askarel to the nearest 0.05 g into a 125 cm3 Erlcnmeyer flask. (b, Add 10 cm3 of chloroform, 40 cm3 of glacial acetic acid and 10 cm3 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 Hvdrogcn chloride equivalence (mg/g)=`--:---------*W where T- litre of perchloric acid (cm3) N normality of perchloric acid W weight of sample (g) Bulk 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. A booklet indicating the type of system necessary for the efficient handling of Aroclor in bulk is available from Monsanto. 6. Additional Notes (a) I he titiant is very stable and docs not require frequent restaiulardization. (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 wili be available for site discussions regarding the most efficient type ofinstallation for the particular location and an offloading procedure appropriate to that particular installation. 3 0151640 TOWOLDMONOQ23865 Handling Precautions Aroclor drums and containers carry the followin'' label which fives general instructions for handling: IMPORTANT CHLORODIPHENYiLS (42%-54%) (or 60%) (PCB) This product contains POLYCHLORINATED BIPHENYLS (PCB's) which some studies heve 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: ). Animal toxicity tests (small mammals) indicate that acute oral toxicity is low blit 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 sjljcone 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. Disposal of empty drums and waste Aroclor ' Empty drums should not he 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 time 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) 19.1 1.01 Telex: 916093 Telex: 22110/21986 0151641 Aroclor is Rc-grsiored Tr.id<- V ui. Published by Monsanto Furope SA. 11-27{E)M-E 2 (S'73) TOWOLDMONOQ23866 Monsanto AROCLOR 1342 El Tentative Sales Specification '...' a // I PROPERTY Colour Clarity Density at 20 C (kg/nf*) Refractive Index at 20 C Viscosity at 20 C (cstks) Fire point Pour point (C) Neutralisation number (mg KOH/g) Inorganic Chlorides (ppm) Water content (ppm) Hydrolysable Chlorides (ppm) Thermal stability (ppm) Penta and higher Chlorinated Biphenyls (%) Scavenger Equivalent (mg. HCl/g.) Volume Resistivity at 100 C, 500 v. 1 min. (G ohm.m) Dissipation Factor at 100 "C, 50Hz Permittivity at 100 C and 50 Hz TEST METHOD ASTM D 1702 ASTM D 1702 ASTM D 1810/ISO R649 ASTM D 1218 ASTM D 445 ASTM D 92 ASTM D 97 Monsanto ASTM D 1821 ASTM D 1533/ISO R760 ASTM D 2441 ASTM D 1936 CIGRE Method Monsanto LIMITS 50 max. Clear 1365 - 1380 1.6225-1.6255 | I 65 max. 1 None to boiling - 18 max. 0.01 max. 0.1 max. 30 max. 1.0 max. 0.5 max. 3.5 max . 1.5 - 1.8 10 min. 0.04 max. 4.7 - 5.1 Brussels, 15/04/75 The information in this bulletin is to our best knowledge true and accurate but ell instructions, recommendations or suggestions arc mode without guaranlee. Since the conditions of use ms beyond thoir control, Monsanto Company and its subsidiaries disclaim any liability for loss or more no liability Is accopted If use of any product in patent. l ,>* oi5ir>`*2 TOWOLDMONOQ23867