Electrolytic cell

Claim 2

An anode comprising a pair of slotted plates of a film-forming meal or alloy thereof mounted on a support and carrying on at least part of their surfaces an electrocatalytically active coating, the slots extending lengthwise from the point of mounting, a removable spacer adapted to engage the plates at their unsupported ends so as to maintain the plates substantially parallel to one another and at a fixed distance apart, and one or more spacing studs located between the plates and attached to the back surface of one of the plates and adapted to engage the back surface of the other plate when the two plates are at their fixed distance apart.

Claim 3

An anode as claimed in claim 1 wherein the slotted plates are in the form of louvres.

Claim 4

An anode as claimed in claim 2 wherein the louvres are formed by pressing from a sheet of a film-forming metal or alloy thereof.

Claim 5

An anode as claimed in claim 2 wherein the louvres are inclined at 60° to the plane of the sheet.

Claim 6

An anode as claimed in claim 1 wherein the support is a bridge piece of a film-forming metal or alloy thereof.

Claim 7

An anode as claimed in claim 1 wherein the removable spacer comprises a comb or clip.

Claim 8

An anode as claimed in claim 6 wherein the comb or clip is of a plastics material.

Claim 9

An anode as claimed in claim 6 wherein the comb or clip is of a film-forming metal or alloy thereof.

Claim 10

An anode as claimed in claim 1 wherein the spacing studs are of a film-forming metal alloy thereof.

Claim 11

An anode as claimed in claim 1 wherein the film-forming metal is titanium.

Claim 12

An anode as claimed in claim 1 whenever coated with a mixture of a platinum metal oxide and a film-forming metal oxide.

Claim 13

An anode as claimed in claim 11 coated with a mixture of ruthenium oxide and titanium dioxide.

Claim 14

An electrolytic cell comprising a plurality of anodes, a plurality of cathodes and diaphragms separating the anodes and cathodes and wherein each anode is as claimed in claim 1.

Claim 15

A cell as claimed in claim 13 wherein the anode is mounted directly on the baseplate of the cell.

Claim 16

A cell as claimed in claim 13 wherein the anodes are mounted on studs of a film-forming metal or alloy thereof which studs have been premounted on the baseplate of the cell.

Claim 17

A cell as claimed in claim 14 wherein the baseplate is of a film-forming metal or alloy thereof.

Claim 18

A cell as claimed in claim 15 wherein the film-forming metal is titanium.

Claim 19

A cell as claimed in claim 13 wherein the anode/cathode gap is in the range from 2 to 10 mm.

Claim 20

A cell as claimed in claim 18 wherein the anode/cathode gap is 6 mm.

Claim 21

A cell as claimed in claim 13 wherein the cathode is of mild steel gauze.

Claim 22

A cell as claimed in claim 13 wherein the diaphragm comprises asbestos.

Claim 23

A cell as claimed in claim 13 wherein the diaphragm comprises polytetrafluoroethylene or polyvinylidene fluoride.

Claim 24

An electrolytic cell as claimed in claim 13 whenever used for the electrolysis of an aqueous alkali metal chloride solution.

Claim 25

An anode comprising a pair of parallel plates of a film-forming metal or alloy thereof mounted at one end on a support and having unsupported opposite ends, the plates carrying on at least part of their surfaces an electrocatalytically active coating, each of said plates having a plurality of louvres pressed out of the plate whereby the louvres alternate with slots, the slots and louvres extending lengthwise from the point of mounting, a removable spacer in the form of a comb or clip removably fitting over unsupported ends of the plates so as to maintain the plates substantially parallel to one another and at a fixed distance apart, and at least one spacing stud located between the plates intermediate their ends and attached to the back surface of one of the plates and adapted to engage the back surface of the other plate when the two plates are at their fixed distance apart.

Claim 26

An anode comprising a pair of parallel plates of a film-forming metal or alloy thereof mounted at one end on a support and having unsupported opposite ends, the plates carrying on at least part of their surfaces an electrocatalytically active coating, each of said plates having a plurality of louvres pressed out of the plate whereby the louvres alternate with slots, the slots and louvres extending lengthwise from the point of mounting, a removable spacer in the form of a comb or clip removably fitting over unsupported ends of the plates so as to maintain the plates substantially parallel to one another and at a fixed distance apart, and at least one spacing stud located between the plates intermediate their ends and attached to the back surface of one of the plates and adapted to engage the back surface of the other plate when the two plates are at their fixed distance apart.