Indian-Omani joint venture Sebacic Oman SAOC said it has begun building the worlds largest sebacic acid plant, a 30,000 ton per year facility in Omans Duqm free zone. Sebacic acid comes from castor oil and is used in the manufacture of lubricants and other materials. Hexa Research forecast that alpha olefin demand in Asia-Pacific will grow to 900,000 tons by 2020, driven largely by demand for polyalphaolefins to make synthetic lubricants.