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On the 1 May 2002, Crown Prince Mohammed bin Rashid Al Maktoum issued a royal decree to establish the Dubai Multi Commodities Centre (DMCC) as a center for commodities trading. [5] Further regulations were issued through decrees that clarified the DMCC's status as an independent authority and exempted companies operating in the free-trade zone ...
Per-kilogram prices of some synthetic radioisotopes range to trillions of dollars. ... ( mg / kg ) Price [7] Year Source Notes USD ... (8.864 × 10 16 kg) 17.1 ...
In the lime industry, limestone is a general term for rocks that contain 80% or more of calcium or magnesium carbonate, including marble, chalk, oolite, and marl.Further classification is done by composition as high calcium, argillaceous (clayey), silicious, conglomerate, magnesian, dolomite, and other limestones. [5]
Agricultural lime, also called aglime, agricultural limestone, garden lime or liming, is a soil additive made from pulverized limestone or chalk. The primary active component is calcium carbonate . Additional chemicals vary depending on the mineral source and may include calcium oxide .
The density of limestone depends on its porosity, which varies from 0.1% for the densest limestone to 40% for chalk. The density correspondingly ranges from 1.5 to 2.7 g/cm 3 . Although relatively soft, with a Mohs hardness of 2 to 4, dense limestone can have a crushing strength of up to 180 MPa . [ 13 ]
Annual worldwide production of quicklime is around 283 million tonnes. China is by far the world's largest producer, with a total of around 170 million tonnes per year. The United States is the next largest, with around 20 million tonnes per year. [9] Approximately 1.8 t of limestone is required per 1.0 t of quicklime.
In 1969, Dr. Karsanbhai Patel, a chemist at the Gujarat Government's Department of Mining and Geology manufactured phosphate-free synthetic detergent powder, and started selling it locally. The new yellow powder was priced at ₹3.50 per kg, at a time when HUL's Surf was priced at ₹13. Nirma sold well in Ruppur , Patel's hometown. He started ...
For preservation purposes, Type N and Type O mortars are often used. A Type N mortar is 1 part Portland, 1 part Lime and 6 parts sand or other aggregate (1:1:6). A Type O mortar is 1 part Portland, 2 parts Lime and 9 parts sand or other aggregate (1:2:9). Straight lime mortar has no Portland, and 1 part Lime to 3 parts sand or other aggregate.