In organic chemistry, ethers are a class of compounds that contain an ether group—a single oxygen atom bonded to two separate carbon atoms, each part of an organyl group. They have the general formula R−O−R′, where R and R′ represent the organyl groups. Ethers can again be classified into two varieties: if the organyl groups are the same on both sides of the oxygen atom, then it is a simple or symmetrical ether, whereas if they are different, the ethers are called mixed or unsymmetrical ethers. A typical example of the first group is the solvent and anaesthetic diethyl ether, commonly referred to simply as "ether". Ethers are common in organic chemistry and even more prevalent in biochemistry, as they are common linkages in carbohydrates and lignin.
A solvent is a substance that dissolves a solute, resulting in a solution. A solvent is usually a liquid but can also be a solid, a gas, or a supercritical fluid. Water is a solvent for polar molecules, and the most common solvent used by living things; all the ions and proteins in a cell are dissolved in water within the cell.
Petrochemicals are the chemical products obtained from petroleum by refining. Some chemical compounds made from petroleum are also obtained from other fossil fuels, such as coal or natural gas, or renewable sources such as maize, palm fruit or sugar cane.
Ellendale is a town in Sussex County, Delaware, United States. The population was 487 at the 2020 census, an increase of 27.8% since the 2010 census, and a 48.9% increase since the year 2000. It is part of the Salisbury, Maryland-Delaware Metropolitan Statistical Area. Ellendale is the "Gateway to Delaware's Resort Beaches" because it is the town located on U.S. Route 113, the resort area's westernmost border, and Delaware Route 16, the resort area's northernmost border with the eastern border being the Delaware Bay and Atlantic Ocean and the southern border being the state line with Maryland.
Manchester is the most populous city in the U.S. state of New Hampshire and the tenth most populous in New England. As of the 2020 census, it had a population of 115,644. Manchester is a major city within the boundaries of the Greater Boston, Massachusetts Metropolitan Area.
Dry cleaning is any cleaning process for clothing and textiles using a solvent other than water. Clothes are instead soaked in a water-free liquid solvent. Perchloroethylene is the most commonly used solvent, although alternative solvents such as hydrocarbons, and supercritical CO2 are also used.
A paint thinner is a solvent used to dilute oil-based paints or varnish. In this context, to dilute is also known as to 'thin'. Paint thinners are diluents. Solvents labeled "paint thinner" are usually white or mineral spirits.
South Deering, located on Chicago's far South Side, is the largest of the 77 official community areas of that city. Primarily an industrial area, a small residential neighborhood exists in the northeast corner and Lake Calumet takes up a large portion of the area. 80% of the community area is zoned as industrial, natural wetlands, or parks. The remaining 20% is zoned for residential and small-scale commercial uses. It is part of the 10th Ward, once under the control of former Richard J. Daley ally Alderman Edward Vrdolyak.
2-Butoxyethanol is an organic compound with the chemical formula BuOC2H4OH. This colorless liquid has a sweet, ether-like odor, as it derives from the family of glycol ethers, and is a butyl ether of ethylene glycol. As a relatively nonvolatile, inexpensive solvent, it is used in many domestic and industrial products because of its properties as a surfactant. It is a known respiratory irritant and can be acutely toxic, but animal studies did not find it to be mutagenic, and no studies suggest it is a human carcinogen. A study of 13 classroom air contaminants conducted in Portugal reported a statistically significant association with increased rates of nasal obstruction and a positive association below the level of statistical significance with a higher risk of obese asthma and increased body mass index.
Pigtown is a neighborhood in the southwest area of Baltimore, bordered by Martin Luther King Jr. Boulevard to the east, Monroe Street to the west, Russell Street to the south, and West Pratt Street to the north. The neighborhood acquired its name during the second half of the 19th century, when the area was the site of butcher shops and meat packing plants to process pigs transported from the Midwest on the B&O Railroad; they were herded across Ostend and Cross Streets to be slaughtered and processed.
tert-Butyllithium is a chemical compound with the formula (CH3)3CLi. As an organolithium compound, it has applications in organic synthesis since it is a strong base, capable of deprotonating many carbon molecules, including benzene. tert-Butyllithium is available commercially as solutions in hydrocarbons (such as pentane); it is not usually prepared in the laboratory.
Firefighting foam is a foam used for fire suppression. Its role is to cool the fire and to coat the fuel, preventing its contact with oxygen, thus achieving suppression of the combustion. Firefighting foam was invented by the Moldovan engineer and chemist Aleksandr Loran in 1902.
Baden is a neighborhood of St. Louis, Missouri.
Franz Park is a neighborhood of St. Louis, Missouri.
Hamilton Heights is a neighborhood of St. Louis, Missouri. The neighborhood is bounded by Dr. Martin Luther King Drive on the Northeast, the city limits on the Northwest, Page Avenue on the South, and Union Boulevard on the East.
Hi-Pointe is a neighborhood of St. Louis, Missouri, within a section known as Dogtown. It is bounded by Clayton Avenue and Oakland Avenue on the north, City Limits on the west, Dale Avenue on the south, and Louisville Avenue on the east. It is bordered by the Skinker-DeBaliviere neighborhood and Forest Park on the north, the Clayton-Tamm neighborhood on the east, the Franz Park neighborhood on the south and the city of Richmond Heights, part of St. Louis County on the west.
Frogtown is a neighborhood in Saint Paul in the U.S. state of Minnesota. Built around University Avenue, the Thomas-Dale neighborhood is colloquially known as Frogtown. Historically, Frogtown was a subsection of the current Thomas-Dale neighborhood. It is bordered by University Avenue on the south, the Burlington Northern Railroad tracks to the north, Lexington Parkway on the west and Rice Street on the east.
Dogtown is a traditionally Irish section of St. Louis, Missouri. It is located south of Forest Park, with its southeastern edge abutting the traditionally Italian section of town, The Hill neighborhood. The neighborhood is anchored by St. James the Greater Catholic Church.
Clayton–Tamm is a historic St Louis neighborhood and once an Irish-American enclave located near the western border of St. Louis, Missouri, USA, just south of Forest Park.
In the petroleum refining and petrochemical industries, the initialism BTX refers to mixtures of benzene, toluene, and the three xylene isomers, all of which are aromatic hydrocarbons. The xylene isomers are distinguished by the designations ortho –, meta –, and para – as indicated in the adjacent diagram. If ethylbenzene is included, the mixture is sometimes referred to as BTEX.
