Question

what is Ziegler nata catalyst​

Answer 1

A Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, is a catalyst used in the synthesis of polymers of 1-alkenes (alpha-olefins). Two broad classes of Ziegler–Natta catalysts are employed, distinguished by their solubility:

Heterogeneous supported catalysts based on titanium compounds are used in polymerization reactions in combination with cocatalysts, organoaluminum compounds such as triethylaluminium, Al(C2H5)3. This class of catalyst dominates the industry.[1]

Homogeneous catalysts usually based on complexes of Ti, Zr or Hf. They are usually used in combination with a different organoaluminum cocatalyst, methylaluminoxane (or methylalumoxane, MAO). These catalysts traditionally contains metallocenes but also feature multidentate oxygen- and nitrogen-based ligands.[2]

Ziegler–Natta catalysts are used to polymerize terminal alkenes (ethylene and alkenes with the vinyl double bond):

n CH2=CHR → −[CH2−CHR]n−;

Contents

1 History

2 Stereochemistry of poly-1-alkenes

3 Classes

3.1 Heterogeneous catalysts

3.2 Homogeneous catalysts

3.2.1 Metallocene catalysts

3.2.2 Non-metallocene catalysts

4 Mechanism of Ziegler–Natta polymerization

4.1 Termination processes

5 Commercial polymers prepared with Ziegler–Natta catalysts

6 References

7 Further reading

Answer 2

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♣ ZIEGLER-NATTA CATALYST

✍️ A Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, is a catalyst used in the synthesis of polymers of 1-alkenes.

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✍️ Ziegler-Natta catalyst, any of an important class of mixtures of chemical compounds remarkable for their ability to effect the polymerization of olefins  (hydrocarbons containing a double carbon–carbon bond) to polymers of high molecular weights and highly ordered (stereoregular) structures.

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✍️ On the other hand, Ziegler Natta catalyst is a mixture of triethylaluminium and titanium tetrachloride, which is used in the synthesis of high density polythene from ethane.

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