JP2903082B2 - Platinum catalyst member for combustion equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a platinum catalyst member attached to a crater of a burning appliance such as a gas lighter for promoting the combustion of fuel gas.

[0002]

2. Description of the Related Art Heretofore, a platinum catalyst member of this type has a hollow frame with a platinum wire or a platinum alloy wire (hereinafter, referred to as a platinum wire or the like) bulged a plurality of times. There is a material sandwiched between supports, or a material obtained by winding a platinum wire or the like in a coil shape and holding both ends of the platinum wire or the like in a ring. However, the platinum wire or the like has a wire diameter of 0.12 to 0.1.
5 mm, and the composition is 100 wt% Pt or Pt
It contains a platinum group element such as h, Ir, and Pd. Here, platinum group elements such as Rh, Ir, and Pd other than Pt are desirably contained in the Pt alloy wire in an amount of 10 wt% or more from the viewpoint of impact resistance such as dropping of a burning appliance. However, when the content is such, the catalytic reaction is remarkably reduced, and cannot function sufficiently as a platinum catalyst member. Therefore, the upper limit of the content has been conventionally set at 10 wt% or less in harmony with the catalytic reaction.

[0003]

2. Description of the Related Art Problems that arise when a platinum wire or the like used in a platinum catalyst member is 100 wt% Pt or the platinum alloy wire are as follows. That is, 1
In the case of a platinum wire made of 00 wt% Pt, the production cost of a platinum catalyst member is extremely high because 100% of extremely expensive Pt is used, and the impact resistance is largely lacking. . Further, in the case of the platinum alloy wire, at least 90 wt% contains extremely expensive Pt, so that the production cost is not less than 100 wt% Pt, and the impact resistance is not enough. That is not. Therefore, conventionally, in order to reduce the production cost of the platinum catalyst member, measures have been taken to reduce the amount of platinum, which accounts for an extremely high proportion in the cost structure. However, there is a limit to the reduction from the viewpoint of ensuring the minimum required catalytic reaction, and further reduction in the production cost of the platinum catalyst member has been in a deadlock.

[0004]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems of the conventional platinum catalyst members, that is, to provide extremely high impact resistance and greatly reduce the production cost. To provide a platinum catalyst member.

[0005]

The means will be described below with reference to FIGS. 1 and 2. In view of the manufacturing cost structure of the platinum catalyst member 4, the combustion flame 3, which is a mixed gas of flammable gas and air ejected from the nozzle 2 disposed below the crater of the combustion appliance 1, is raised to a high combustion activity by a catalytic reaction. The platinum alloy wire 5 occupying an extremely large ratio is obtained by the following configuration. That is, the wire diameter is 0.26 mm or more.
Rh, Ir, P not more than 0.30 mm and excluding pt
25 wt% or more of one or more of the platinum group elements d
It is a platinum alloy wire containing 0 wt% or less .

As described above, it is difficult to incorporate 10 wt% or more of a platinum group element such as Rh except for pt into the platinum alloy wire 5 in view of harmony with the catalytic reaction, and it is impossible to withstand use at all. Regardless of the idea, the reason for adopting a configuration that breaks the idea is as follows. That is, the catalyst reaction in the platinum catalyst member 4 is caused by the platinum alloy wire 5
The catalytic reaction becomes remarkable as the surface area increases. In the present invention, the content of the platinum group element excluding pt was greatly increased because the catalytic reaction which is significantly reduced by setting the content of the platinum group element excluding pt to 25 wt% or more was reduced by reducing the diameter of the platinum alloy wire 5. This is compensated by increasing the surface area of the platinum alloy wire 5 by increasing the surface area. As is well known, some of the platinum group elements other than pt have a so-called ingot price of 40% or less of pt. Therefore, if the content of the low-cost platinum group element comparable to pt is increased, the platinum alloy wire is increased. Cost will be greatly reduced. Therefore, even if the diameter of the platinum alloy wire is increased and the amount of the platinum alloy wire used is increased, the cost of the platinum alloy wire itself is determined by the wire diameter and the content of the platinum group element excluding pt which constitute the present invention. , The production cost of the platinum catalyst member also decreases in conjunction with it.

The platinum group element other than Pt contained in the platinum alloy wire 5 used in the platinum catalyst member for a combustion appliance according to the present invention is not limited to one, but may be two or more. For example, Ir and Pd.

[0008]

The platinum catalyst member 4 using the platinum alloy wire 5 according to the present invention is attached to the crater of the burning appliance 1 such as a gas lighter, and the flammable fuel jetted from the nozzle 2 disposed below the crater. When exposed to a combustion flame 3 composed of a mixed gas of gas and air, the catalytic reaction per unit area of the platinum alloy wire 5 is not sufficient, but the diameter of the platinum alloy wire is increased and the surface area of the catalyst is increased. The combustion flame 3 contacting the platinum alloy wire 5 by the reinforcement of the reaction is raised to a high combustion activation state at least equivalent to the conventional one by the catalytic action of platinum,
As a result, the combustion is instantaneous and complete.

[0009]

[0010]

The first effect brought about by the present invention is that although the amount of the platinum alloy wire 5 used is increased, the platinum alloy element which is inexpensive compared to pt is contained to the extent that it can be made into a wire rod, so that the platinum alloy wire 5 can be used. The cost of the line itself could be reduced by at least 10% . In response to this cost reduction effect, the manufacturing cost of the platinum catalyst member itself can be reduced by 10% or more in conjunction therewith.

The second effect is that the platinum alloy wire 5 used in the platinum catalyst member 4 of the present invention has a high bending rigidity according to the spring steel wire rod as described above. The impact resistance of the catalyst member is at least twice as high as that of the prior art.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a platinum catalyst member according to the present invention.

FIG. 2 is a part of a sectional view showing a state where the platinum catalyst member according to the present invention is attached to a combustion appliance.

[Explanation of symbols]

 1. Burning appliances 2. Nozzle 3. Combustion flame 4. Platinum catalyst member 5. Platinum alloy wire 6. ring

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B01J 21/00-37/36 F23Q 2/30

Claims (1)

(57) [Claims] A platinum catalyst member for a platinum catalyst member for raising a combustion flame composed of a mixture of flammable gas and air ejected from a nozzle disposed below a crater of a combustion appliance to a high combustion activity by a catalytic reaction. Wire diameter 0.26mm or more
Rh, Ir, P not more than 0.30 mm and excluding pt
25 wt% or more of one or more of the platinum group elements d
A platinum catalyst member for a combustion appliance using a platinum alloy wire containing 0 wt% or less .