Question: The anthraquinone process was developed by a German chemical company with a capital located in which city?

Context paragraphs:
BASF: BASF SE is a German chemical company and the largest chemical producer in the world.  The BASF Group comprises subsidiaries and joint ventures in more than 80 countries and operates six integrated production sites and 390 other production sites in Europe, Asia, Australia, the Americas and Africa.  Its headquarters is located in Ludwigshafen, Germany.  BASF has customers in over 190 countries and supplies products to a wide variety of industries.  Despite its size and global presence, BASF has received relatively little public attention since it abandoned manufacturing and selling BASF-branded consumer electronics products in the 1990s.

K+S: K+S AG (formerly" Kali und Salz GmbH") is a German chemical company headquartered in Kassel.  The company is Europe’s largest supplier of potash for use in fertilizer and, after the acquisition of Morton Salt, the world's largest salt producer.  The firm also produces and distributes other mineral fertilizers, such as those from magnesium and sulphur.  K+S is mainly active in Europe, North and South America with more than 14,000 employees worldwide (2014).

Swann Chemical Company: The Swann Chemical Company was an American chemical company started by Theodore Swann, described by one historian as "a flamboyant Birmingham mogul and New South industrialist."  Swann Chemical first operated a chemical manufacturing plant in Anniston, Alabama where PCBs were first made on an industrial scale after development of a new process under leadership of Theodore Swann.  The plant was later bought by Monsanto Industrial Chemicals Co. in 1935.  The plant, just west of Anniston, had around 1,000 employees.

Lactobacillus L. anticaries: Lactobacillus L. anticaries is a bacterium created by the German chemical company BASF.  This bacterium has been added to chewing gum, but it does not remove the need to brush one's teeth.  "L. anticaries" eliminates the malignant bacteria in one's mouth in order to help prevent tooth decay.  BASF claims that it can destroy this bacterium.  The bacterium can be found in many varieties of yogurt.

Anthraquinone process: The anthraquinone process is a process for the production of hydrogen peroxide, which was developed by BASF.  The industrial production of hydrogen peroxide is based on the reduction of oxygen, as in the direct synthesis from the elements.  Instead of hydrogen itself, however, a 2-alkyl-anthrahydroquinone, which is generated before from the corresponding 2-alkyl-anthraquinone by catalytic hydrogenation with palladium.  Oxygen and the organic phase react under formation of the anthraquinone and hydrogen peroxide.  Among other alkyl groups (R) ethyl- and tert.  Butyl are used, e.g., 2-ethylanthraquinone.

SGL Carbon: SGL Carbon SE is a German chemical company.  It is one of the world's leading manufacturers of products from carbon.  The company portfolio ranges from carbon and graphite materials to carbon fibers and composites.  A broad base of materials, the deployment of the relevant technologies and many years of application and engineering expertise are the basis of the company's success.

Alden B. Dow Office and Lake Jackson City Hall: The Alden B. Dow Office and Lake Jackson City Hall is a historic, single-story, wood-frame commercial building in Lake Jackson, Texas, located near Freeport.  Built in 1943, it was designed by noted Michigan architect Alden B. Dow in Modern Movement architectural style.  The structure was designed as part of a company town of Dow Chemical Company and served as Alden Dow's local office during the development of Lake Jackson.  Alden Dow, sometimes called the "Father of Lake Jackson" laid out the plan for the city's streets and designed all of the city's initial buildings, plus six models for varied styles of residences.  Dow was the son of the Dow Chemical Company's founder, Herbert Henry Dow.  In a May 1944 publication issued by Dow Chemical Company, the Alden B. Dow Office and Lake Jackson City Hall were described as follows:

Paul Mendelssohn Bartholdy: Paul Mendelssohn Bartholdy (born "Paul Felix Abraham Mendelssohn Bartholdy"; 18 January 1841, Leipzig – 17 February 1880, Berlin) was a German chemist and a pioneer in the manufacture of aniline dye.  He co-founded the Aktien-Gesellschaft für Anilin-Fabrikation (AGFA), a German chemical company.

Chemtura: Chemtura Corporation was a global corporation headquartered in Philadelphia, Pennsylvania, with its other principal executive office in Middlebury, Connecticut.  Merged into Lanxess in 2017, the company focused on specialty chemicals for various industrial sectors, and these were transportation (including automotive), energy, and electronics.  Chemtura operated manufacturing plants in 11 countries.  Its primary markets were industrial manufacturing customers.  The corporation employed approximately 2500 people for research, manufacturing, logistics, sales and administration.  Operations were located in North America, Latin America, Europe and Asia.  In addition, the company had significant joint ventures primarily in the United States.  For the year ended December 31, 2015, the company's global core segment revenue was $1.61 billion.  Chief executive officer was Craig A. Rogerson, who was also the president and chairman of the board of Chemtura Corporation.  On April 21, 2017, Chemtura was acquired by the German chemical company Lanxess.

BMA process: The BMA process or Degussa process is a chemical process developed by the German chemical company Degussa for the production of hydrogen cyanide from methane and ammonia in presence of a platinum catalyst.  Hydrogen cyanide is used in the chemical industry for the production of intermediate chemicals like acrylonitrile, methyl methacrylate, and adiponitrile.

Supporting paragraphs: Anthraquinone process BASF
Answer: Ludwigshafen