Hindustan Dorr Oliver Ltd has announced that the company has signed a Memorandum of Understanding with Central Pulp & Paper Research (CPPRI), a national level institute under Ministry of Industries, Government of India to obtain the latest research know how from CPPRI and commercialise the same by executing these technologies in Pulp & Paper Industries and other South East Asian countries. The Key focus areas include desilication of black liquor, Lignin removal / Separation technology and Environment Protection.