PO 7.1

At what conditions oxidation of ethylbenzene proceeds by air to form 10-13% hydroperoxide in propylene oxide production technology?

• at a temperature of 140°C and a pressure of 0.25 MPa

• at a temperature of 150°C and a pressure of 0.35 MPa

• at a temperature of 160°C and a pressure of 0.35 MPa

• at a temperature of 150°C and a pressure of 0.45 MPa

• at a temperature of 140°C and a pressure of 0.35 MPa

At what temperature range the oxidation of the isopropylbenzene is carried out in the liquid phase in the presence of the initiator - hydroperoxide isopropylbenzene (HPIPB)?

• at a temperature of 110-130°C

• at a temperature of 115-135°C

• at a temperature of 120-130°C

• at a temperature of 120-135°C

• at a temperature of 110-140°C

For what purpose layer of chromium-nickel steel Cr18Ni9Т is used in reactors of hydroformylation?

• to cool the reaction

• to resist to CO, H₂ and hydrocarbonyl cobalt

• to heat the reaction

• to protect from O₂

• no correct answer

For what purpose the tert-butyl hydroperoxide and di-tert-butylperoxide are used?

• as initiators of radical polymerization and vulcanization of polyolefin rubbers

• to obtain the maximum yield of oxygen-containing products

• to prevent the formation of explosive mixtures

• as inhibitor of carbon monoxide formation

• no correct answer

How ethylene is purified from the acetylene in ethylene oxide production?

• by selective hydrogenation or by copper oxide with precipitation of copper acetylides

• it is saponified in saponifiers

• it is hydrolysed with water by decomposition reaction

• it is washed with alkali, water, passed through an adsorber with activated carbon

• no correct answer

How ethylene is purified from the sulfur compounds in ethylene oxide production?

• it is washed with alkali, water, passed through an adsorber with activated carbon

• by selective hydrogenation or by copper oxide with precipitation of copper acetylides

• it is saponified in saponifiers

• it is hydrolysed with water by decomposition reaction

• no correct answer

How the heat of oxidative cracking reactor is supplied in following scheme?

• By air which is pumped by the compressor 13 through the nozzles to the lower part of the reactor

• By gas from the gas separator 14

• By recycling compounds from separator 8’

• By non-reacted compounds from the settler 17

• By recycling catalyst

In reactors with internal heat removal, how are the reaction components introduced into the reaction zone?

• Only cold feedstock is introduced from below

• Only reaction products are introduced from below

• All reaction components are introduced from below

• Half of the components are introduced from above and half from below

• The location of component introduction depends on the specific reaction

It is obtained by polymerizing ethylene at high temperatures (up to 300°C) and pressures up to 250 MPa in the presence of radical initiators

• high-pressure polyethylene

• low-pressure polyethylene

• medium-pressure polyethylene

• low-pressure polypropylene

• no correct answer

Name the equipment 10 in following scheme:

• contact apparatus of selective hydrogenation

• low-boiling products distillation column

• primary rectification column

• acetone extraction column

• MEK extraction column