Benzene is used mainly as an intermediate to make other chemicals, above all ethylbenzene, cumene, cyclohexane, nitrobenzene, and alkylbenzene. More than half of the entire benzene production is processed into ethylbenzene, a precursor to styrene, which is used to make polymers and plastics like polystyrene and EPS. Some 20% of the benzene production is used to manufacture cumene, which is needed to produce phenol and acetone for resins and adhesives.
The main symptoms of a chest infection can include: 1  a persistent cough. 2  coughing up yellow or green phlegm (thick mucus), or coughing up blood. 3  breathlessness or rapid and shallow breathing. 4  wheezing. 5  a high temperature (fever). 6  a rapid heartbeat. 7  chest pain or tightness.
Adult chest infections. Anyone can have a chest infection, and they are common after having a cold or flu, especially in the autumn and winter. The two main types of chest infection in adults are acute bronchitis and pneumonia.he symptoms and complications of a chest infection can be much worse in people with certain medical conditions. Adults who are more at risk if they have a chest infection include: 1  People who are 65 years old and older. 2  People who smoke or drink alcohol excessively.