K.RAVIRAJS.ABDUL RAHAMANPROJECT REVIEW ON PRODUCTION OF ACROLEIN1It belongs to ,-Unsaturated carbonyl compounds family

C C C O Formula:

C H2=CHCHO

Other Names

2-Propenal, Acrylaldehyde, Propenal, Acrylic aldehyde, prop-2-enal, Allyl aldehyde

ACROLEIN2It is simplest unsaturated aldehyde

Primary characteristic of acrolein is conjugation of carbonyl group with vinyl group

It is a colourless liquid with a piercing, disagreeable, acrid smell

Highly toxic with lacrimatory properties

It may be formed from the breakdown of certain pollutants in outdoor air or from the burning of organic matter including tobacco, or fuels such as gasoline or oil

It is toxic to humans following inhalation, oral or dermal exposures

INRODUCTION3

4AIM: To

5 The first industrial process was invented by Degussa in1942, produced acrolein by aldol condensation of formaldehyde and acetaldehyde HCH=O + CH3CH=O CH2=CHCHO + H2O

The second process that emerged at the end of the1950s was partial oxidation of propylene CH3CH=CH2 + [O] CH2=CHCHO + H2O

The Shell Company initiated the gas phase acrolein production by partial oxidation of propylene in1958

Followed by stand oil of Ohio(SOHIO)which indentified bismuthmolybdateas the catalyst for an economical and high yield acrolein production

HISTORY:6AIM: To

7PROPENE OXIDATION:

GLYCEROL ROUTE:

(CH2OH)2CHOH CH2=CHCHO + 2 H2OMAIN PROCESSES:

8Out of two processes propene oxidation is commercially attractive one

BECAUSE

Availability of propene is very high

Economically viable

Development of catalysts with high selectivity

Cheap cost of propene compared to glycerolSELECTION OF A PROCESS:9Catalytic vapour phase oxidation is generally carried out in fixed bed multi tube reactorFEED:

PropeneSteamAirCATALYST:

Bismuth molybdate

OPERATING CONDITIONS:

Temperature: 350C Pressure: 1 atm

The reaction is very exothermic [ heat of propene oxidation is 340 kJ/mol]

PROCESS DESCRIPTION:10 in addition to acrolein other side products are like acrylic acid, acetaldehyde, acetic acid, carbon monoxide, carbondioxide are formedCont

11Resulting products from the reactor are separated by series of quench cooler, Acrolein Absorber, Water Distillation Tower, Acrolein Distillation Tower

Finally acrolein of specified purity is obtaind

Process flow diagram is show below Cont

12AIM: To

13AIM: To USES:

14BIOCIDE:

Acrolein is mainly used as a contact herbicide to control submersed and floating weeds, as well as algae, in irrigation canals

Used as an agent to control growth of microbes in process feed lines

Currently, It is used to control growth of algae in oil fields

It is also used as a H2S Scavenger

15CHEMICAL PRECURSOR

Used in the production of polyacrylate(SAP)

Methionine production [animal growth, very important amino-acid]

Transparent ballistic polymer[1,3 propanediol] production

Poly-trimethylene terephthalate(PTT) production[ThePTT is widely using in carpet and textilemanufacturing]

16 THANKYOU17