IS 6186 (1986): Bentonite

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2 $ ' + - Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge 0 1 ' 5 Jawaharlal Nehru Step Out From the Old to the New 1 + , 1 + Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live ! > 0 B Bhart hari N ti atakam Knowledge is such a treasure which cannot be stolen Invent a New India Using Knowledge IS 6186 (1986): Bentonite [CHD 1: Inorganic Chemicals]IS : 6186 - 1986 C Reaffirmed 1991 1 Indiun Standard . mr SPECIFICATION FOR Bentonite ( First Revision ) Second Reprint APRIL 1997 UDC @I Copyright 1987 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 Cr 5 Februar); 1987 -____.

3 _____ __ __~..__ .~~ .^ ~ ---_--- - - Indian Standard IS:6186-1986 ( Renf%med 1991) SPECIFICATION FOR Bentonite ( First Revision ) Inorganic Chemicals ( Miscellaneous ) Sectional Committee, CDC 3 Chairman DR M. S. VAI~YA Members Representing Dharamsi Morarji Chemical Co Ltd, Bombay SERI P. V. S. Rao ( Alternate to Dr M. S. Vaidya ) SRRI S. K. BASU Directorate General of Supplies and Disposals, New Delhi Srrn~ D. S. C~rowr~~run~ ( Alternate) DR A. N. BHA I Hindustan Lever Ltd, Bombay Dn B. S. MOUL~I~ ( Alternate ) DR R. M. BHATNAGAR Projects & Development India Ltd, Sindri SHRI S. N. BHATTA~URYA Tata Chemicals Ltd, Bombay SARI S. GANAPATHV ( Alternate ) SHRI J. C. BOSE Indian Oxygen Ltd, Calcutta SRRI A.

4 I<. DAS ( Alternate ) DR A. V. DEO Associated Cement Companies Ltd, Bombay SIIRI C. H. PAGE ( Alternote ) DR S. GIIOSH In personal capacity ( 17-A F Block, &h-et, Ma& Nagar Extension, New Delhz 1100 17 ) Drt S. H. IQnAL National Chemical Laboratory ( CSIR ): Punt SHRt KI;rxANI Sarabhai M. Chemicals, Vadodara SHRI H. H. KAVARANA ( Alternate) SHRI bfhLliAN Developmrnt Commissioner, Small Scale Industries, New Delhi S~IRI R. MWHOPADHYAY ( Alternate ) SARI P. MANSUI~H ~NI Glaxo Laboratories ( India ) Ltd, Bombay SHILI G. K. NAII~ ( .4lternate ,I SHRI B. MINJ Directorate General of Technical Development, New Delhi Snnr KULTAH SINOH ( Ahrnatr ) SHRI S. V. N~YAI< J. K. Chemicals Ltd, Thane DRANIL PANDIT Deepak Nitrite Ltd, Vadotlara SHRI J.)

5 T. VORA ( Alternate j DR P. G. PRAI>HAN Golden Chemicals Pvt Ltd, Bombay SJTRI T. S. ( Alternate ) DR A. PUROSHOTTA~< Geological Survey of India, Calcutta SHRI A. K. RAO Shriram Foods & Fertiliser Industries, New Delhi S~IRI A. K. MEHR~ ( Alternate ! ( Continred on page 2 ) @ Copyright 1987 BUREAU OF INDIAN STANDARDS This publication is protected under the I&ran Copyright Act ( XIV of 1957 ) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act. IS : 6186 - 1986 ( Continucdfrompuge 1 ) Members DR S. B. RAY SHRK P. DAS ( Alfcrnatr ) SHRI B. K. SACHAR SHRI A. D. GUPTA ( Alfernaic) Repcsrnting SHRI C.))

6 R. SANTHANAKRISHNAN SRRI K. V. MANI ( Alternate) DRE. R. SAXENA Ministry of Defence ( DGI ) Ministry of Defence ( R & D ) Travancore Chemical & Mfg Co Ltd, Mettur Dam Regional Research Laboratory ( CSIR ), Hyderabad .~ ..\ DR MOHD ZAFARJA~IIIL ( Alternate, SHRI C. P. SHARDA Shri Ram Institute for Industrial Research, Delhi SHRI L. B. SRIVASTAVA ( Alternate j SHRI N. N. SUBRAHMANIAN Indian Bureau of Mines, Nagpur SHRI M. R. RUI~AR ( Alternate ) SH~I N. C. THAGICAR Indian Chemical Manufacturers Association, Calcutta SHRI THAKUR Indian Oil Corporation Ltd ( Refineries & Pipelines Division ), New Delhi SHRI MTJSAFIR SINGE ( Alternate ) SHRI SATISH CWANDER, Director General, ISI ( Ex-@irio Mtmbcr ) Director ( Chem ) Secretary &RI M.))

7 BA~SHI GUPTA Deputy Director ( Chem ), ISI Minerals for Chemicals and Allied Industries Subcommittee, CDC 3: 17 Convcnrr SHRI GOPALACHARI Indian Bureau of Mines, Dhanbad MImbcrs SHRI J. A. ASTHAPUTRE Ministry of Defence ( DGI ) SHRI K. P. M AJUMDAR ( Alternate ) SHRI J. V. JOSRI Associated Cement Companies Ltd, Bombay DR V. C. MALASHE ( Alfernak ) SHRI V. M. KARVE Indian Chemical Manufacturers Association, Calcutta SHRI B. K. VAEI ( Alfcrnotr ) SHRI S. C. PANDA Regional Research Laboratory ( CSIR ) Bhubaneshwar DR S. C. DAB ( Altcrnatr ) DR A. PUROSHOTTAJ~ Geological Survey of India, Calcutta SHRI V. SHIVEUMAR Grindwell Norton Ltd, Bangalore SHRISUMESH SINEA Oil & Natural Gas Commission, Dehra Dun 2 IS : 6186 - 1986 Indian Standard SPECIFICATION FOR Bentonite ( First Revision ) 0.

8 FOREWORD This Indian Standard ( First Revision ) was adopted by the Indian Standards Institution on 25 July 1986, after the draft finalized by the Inorganic Chemicals ( Miscellaneous ) Sectional Committee had been approved by the Chemical Division Council. Bentonite , a characteristic type of fine grained clay, is an alteration product of volcanic ash containing not less than 85 percent of the clay mineral montmorillonite (OH)qSi8A1402,aH20. It is used as a decolouri- zer for oils and other liquids in place of adsorbent charcoal and as rubber filler. It is also used in oil-well drilling and petroleum refining, and for pelletizing and agglomeration of ores to utilize the ore fines. Bentonite absorbs water readily to form either sols or gels, depending upon its concentration; a preparation containing about 7 percent of Bentonite being just pourable.

9 In pharmaceutical industry, the sols are suitable for suspending powders in aqueous preparations, such as calamine lotion, and the gels for ointment and cream bases. The gelling property of Bentonite is much reduced in the presence of acid and is increased by the addition of such alkaline substances as magnesium oxide. In aqueous sols and gels, hentonite particles are negatively charged and flocculation occurs when electrolytes or positively charged suspensions are added. Because of this property. Bentonite is sometimes used in clarifying turbid liquids. This standard was first published in 1971. In this revision, the type 2 of the material used for foundry has been deleted, as a separate Indian Standard is under preparation by the Structural and Metals Division Council of IST.

10 The off-shore and high grade of this material have been aligned with the Oil and Natural Gas Commission ( ONGC: ) specification on Bentonite . A new requirement on gel formation index has been prescribed for high and off-shore grades, as the technical committee felt that this test will be helpful to the geological survey bodies for knowing the quality of Bentonite . 3 IS:6186 - 1986 This standard keeps in view the quality of Bentonite available and known to be commercially exploited in the country for use in chemical industries and oil-well drilling. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with 1s : 2-1960*.