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Recrystallization of the crude solid from methanol gave orange crystals of the title anthraquinone ( 120 mg, 15 %), mp 69 – 71. 5 °: IR ( CCl < sub > 4 </ sub >) 2900, 1670, 1540, 1320, 1290, 1250, 1005, 980, 952, 932 cm – 1 ; 1H NMR δ 1. 50 ( s, 2H ), 1. 70 ( m, 2H ), 2. 23 ( m, 2H ), 9. 51 ( s, 18H ); EIMS m / z ( relative intensity ): M + 352 ( 14 ), 337 ( 17 ), 73 ( 67 ), 57 ( 79 ), 55 ( 77 ), 43 ( 100 ), 41 ( 67 ).
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Recrystallization and .
Recrystallization of the rock will destroy the textures and fossils present in sedimentary rocks.
Recrystallization occurs due to heating of the protolith.
Recrystallization generally begins when temperatures reach above half the melting point of the mineral on the Kelvin scale.
Recrystallization and ),
** Fractional crystallization ( disambiguation ), Recrystallization ( disambiguation )
crude and solid
In its strictest sense, petroleum includes only crude oil, but in common usage it includes all liquid, gaseous, and solid ( e. g., paraffin ) hydrocarbons.
* Petroleum coke, a solid, carbon-rich residue derived from distillation of crude oil
The result is a mix of crude hydrocarbons and solid minerals.
The crude bitumen contained in the Canadian oil sands is described by Canadian authorities as " petroleum that exists in the semi-solid or solid phase in natural deposits.
The heavy crude oil or crude bitumen extracted from oil sands is a viscous solid or semisolid form that does not easily flow at normal oil pipeline temperatures, making it difficult to transport to market and expensive to process into gasoline, diesel fuel, and other products.
In its day-prior to the drilling of oilwells to tap reservoirs of crude oil-the pyrolysis of mined solid organic-rich deposits was the conventional method of producing mineral oils.
Ludlow consistently talked of “ hasheesh ” but in fact he took the solid extract of Cannabis Indica which was roughly twice as potent as the crude resin and ten times as potent as marijuana.
The crude material is washed with the solvent and filtered away, leaving the purified product in solid form and any impurities in solution.
An estimated 15, 500 tons of solid waste were buried at the landfill ( this is a very crude estimate ).
crude and from
The distances of these points of light is a problem he cannot master, beyond crude conjectures as to the orderings of the planetary orbits viewed outward from earth.
In American English, asphalt ( or asphalt cement ) is the carefully refined residue from the distillation process of selected crude oils.
Many alkaloids can be purified from crude extracts by acid-base extraction.
* The first Christmas special featured the pair sitting in front of the television providing crude commentary on various aspects of Christmas, and commenting on Christmas-themed music videos from various artists.
It is almost totally supported by exports of crude oil and natural gas, with revenues from the petroleum sector accounting for over half of GDP.
Indian-born Ananda Chakrabarty, working for General Electric, had developed a bacterium ( derived from the Pseudomonas genus ) capable of breaking down crude oil, which he proposed to use in treating oil spills.
However, the area has aroused considerable interest from oil companies in the light of the discovery of rich reserves of high grade crude oil elsewhere in Nigeria.
The raw materials for many of these synthetic substances come from crude oil.
Since 2003, a 1, 070 km pipeline has been used to export crude oil from the oilfields around Doba to offshore oil-loading facilities on Cameroon's Atlantic coast at Kribi.
Unable to use any of the dilapidated buildings remaining on the island from previous occupants, they constructed a crude shelter from cement bags and tin salvaged from Quonset huts built by the American military twenty years earlier.
Also, the crude death rate of 18 per 1, 000 population in 1965 fell to 13 per 1, 000 population in 1992, while life expectancy rose from a 1970 to 1975 average of forty-two years for men and forty-five years for women to fifty-two and fifty-six years, respectively, in 1992.
The Byzantines had easy access to crude oil from the naturally occurring wells around the Black Sea ( e. g., the wells around Tmutorakan noted by Constantine Porphyrogennetos ) or in various locations throughout the Middle East.
An alternate name for Greek fire was " Median fire " (), and the 6th-century historian Procopius, records that crude oil, which was called naphtha ( in Greek νάφθα, naphtha, from Middle Persian نفت ( naft )) by the Persians, was known to the Greeks as " Median oil " ().
Interest grew substantially in the mid-1850s as scientists reported on the potential to manufacture kerosene from crude oil, if a sufficiently large oil supply could be found.
The early efforts failed because of complex geology, and, more importantly, because the refining techniques then available could not manufacture high-quality kerosene from California crude oil, which differed chemically from Pennsylvania crude oil.
This derogatory form of the noun " hack " derives from the everyday English sense " to cut or shape by or as if by crude or ruthless strokes " and is even used among users of the positive sense of " hacker " who produces " cool " or " neat " hacks.
This included reducing labor losses from trade disputes and seasonal fluctuations, reducing industrial losses from accident and injury, and reducing the amount of crude oil spilled during extraction and shipping.
An oil refinery is located near Kingston converts crude petroleum obtained from Venezuela into gasoline and other products.
A crude aircraft landing area was cleared on the northeast side of the island, and a T-shaped marker which was intended to be seen from the air was made from gathered stones, but no airplane is known to have ever landed there.
crude and methanol
Traditionally, mannitol is extracted by the Soxhlet extraction, utilizing ethanol, water, and methanol to steam and then hydrolyze the crude material.
An accidental release of methanol in the environment would, however, cause much less damage than a comparable gasoline or crude oil spill.
crude and gave
Resnais for his part gave a more abstract explanation of the film's purpose: " For me this film is an attempt, still very crude and very primitive, to approach the complexity of thought, of its processes.
This gave the independent producers an alternative to what they perceived as the low prices paid by Standard Oil and the high freight rates charged by the railroads to move crude oil.
It gave Union access to a large volume of crude oil.
Latham gave a promise not to use the kind of " crude " language he had employed in the past.
" Owen Gleiberman of Entertainment Weekly gave the film a positive review, praising the animated part, but calling the live-action segments " crude.
Tests gave yields of between 34½ and 74 gallons of crude oil per ton of coal or 37 – 79 US gal / short ton.
In later episodes, winners were put into a draw to win a television and a selection of DVDs, which gave rise to a crude running gag from Gaby about the size of the television.
The central government gave strong emphasis on development of the sugar cane industry, and Taiwan satisfied 42 % of the crude sugar demand of Japan.
3.190 seconds.