JPS61222981A - Fuel for generating colored flame - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a fuel that generates a colored flame useful for viewing, illumination, signaling, and the like.

(Prior Art) Various attempts have been made to color the flames of candles, lamps, etc. for the purpose of aesthetic effects.

In this case, in order to color the flame, a flame coloring agent such as an alkali metal salt is dissolved in these fuels to generate a flame color reaction unique to the metal elements that accompanies combustion. ing.

However, in the case of candles, candle raw materials such as paraffin, stearic acid, and beeswax generally have difficulty dissolving flame coloring agents.
Another drawback is that the strong yellow light emitted by the large amount of active carbon produced in the flame hinders the flame color effect.

On the other hand, alcohol can dissolve various flame coloring agents, and alcohol itself has a pale flame color, so it has the advantage of not interfering with the flame coloring effect of the flame coloring agent. Crystals of the flame coloring agent and solid combustion residue adhere to the wick, reducing the capillary effect of the wick and making it difficult to absorb alcohol, causing the flame to gradually become smaller and lose its color, eventually stopping combustion. There were drawbacks.

(Problems to be Solved by the Invention) The present invention eliminates this drawback and uses fuel components that do not form or adhere to the wick etc. during combustion, allowing for steady combustion and flame color. The aim is to further improve this.

(Means for Solving the Problems) The present invention is a colored flame-generating fuel comprising a liquid fuel containing an aliphatic lower alcohol as a main ingredient, a flame coloring agent, and a eutectic agent for the flame coloring agent.

The aliphatic lower alcohol which is the main ingredient of the fuel used in the present invention is methyl alcohol, ethyl alcohol, propyl alcohol, isopropyl alcohol, ethylene glycol, etc., and preferably has a small number of carbon atoms so as not to inhibit the color of the flame during combustion. .

In addition, the flame coloring agent that colors the flame by a flame color reaction is preferably a compound of a metal that causes a flame color reaction, such as an alkali metal, an alkaline earth metal, or copper, and is soluble in the main alcohol. Examples include lithium chloride, strontium chloride, calcium chloride, indium chloride, copper chloride, potassium fluoride, potassium iodide, lithium nitrate,
Examples include cesium carbonate, etc., and mixtures thereof.

There is no particular limit to its blending amount, but it is usually 1 to 1 part of the fuel.
It may be about 0%. The fuel used in the present invention may contain various solvents, such as water, /'% halogenated hydrocarbons, aliphatic polyhydric alcohols, etc., for the purpose of improving the solubility of the flame coloring agent and the color development during combustion. They may be mixed.

The present inventors discovered that when a eutectic agent for the flame coloring agent is added to a fuel consisting of a liquid fuel mainly composed of an aliphatic lower alcohol and a flame coloring agent, the fuel can be burned using a wick like an alcohol lamp. It was discovered that even if the flame colorant crystals and solid combustion particles remain in the upper part of the wick, the problem of reduced capillary action caused by flame coloring agent crystals and solid residues is reduced, and as a result, combustion continues for a long time, and the flame color and luminous intensity are improved. Ta.

Here, the eutectic agent of the flame coloring agent referred to in the present invention refers to the eutectic agent of the flame coloring agent, which when it is sucked up by the wick together with the flame coloring agent and heated by the heat of combustion, causes a eutectic phenomenon with the flame coloring agent, etc., and has a lower melting point. Refers to substances that form a mixture.

The present inventors used urea as a eutectic agent for this flame coloring agent.
It has been found that guanidine and its salts and derivatives are particularly effective against flame coloring agents such as lithium nitrate. The blending amount of these eutectic agents depends on the type and blending amount of the flame colorant used together, but is generally 0.1 to 0.1 to the flame colorant.
The weight ratio may be in the range of 10% by weight.

The colored flame-generating fuel of the present invention can be burned for a long time in a wick-based combustion device like a conventional alcohol lamp. It is not clear why there are fewer troubles due to reduced capillarity when the fuel of the present invention is burned, but the flame coloring agent, its eutectic agent, alcohol, and their reaction products are heated and eutectic to form a liquid. It is presumed that this is because the liquid is sucked up smoothly. For example, urea is thought to have this effect because it generally tends to form a eutectic mixture with inorganic nitrates and the like, remains liquid at relatively low temperatures, and has fluidity.

The colored flame generating fuel of the present invention can be used in various types of combustion tools, including alcohol lamps for physical and chemical experiments, as well as those in which a fibrous wick is filled in a cylindrical container, such as glass wool, asbestos, cotton thread, etc. It may also be one filled with nonwoven fabric or the like.

(Example 1) When the fuel of the present invention, which was prepared by dissolving 1.6 g of lithium nitrate and 1.6 g of urea in 80 ml of methyl alcohol, was added to an alcohol lamp for physical and chemical experiments with a 90 ml piece and a cotton thread wick, the lamp lit beautifully. It produced a bright red flame and continued burning until the last of its fuel was consumed. During this time, a lump of liquid eutectic material that boiled or decomposed was observed at the top of the wick.

(Reference example) When 80 ml of fuel prepared by dissolving 1.6 g of lithium nitrate as a flame coloring agent in 80 ml of methyl alcohol was put into the same alcohol lamp as in Example 1 and ignited, a red flame was generated and burned, but the wick A solid substance gradually forms at the top of the
The flame was small 1) The combustion was interrupted after 30 minutes. Fuel consumption stopped at 20ml.

(Effects) In the colored flame generating fuel of the present invention, the flame coloring agent stays in liquid form at the top of the wick, so the density of the flame color increases and the luminous intensity also increases. In other words, less flame colorant can be used than with conventional fuels to provide the same flame color effect.

In addition, the colored flame generating fuel of the present invention burns steadily for a long period of time even when burned in a combustion tool using a wick, and the flame color is deep and the luminous intensity is improved, so it can be used for various displays, mood lighting in restaurants, etc. It can be used for.

Claims (1)

[Claims] A colored flame-generating fuel consisting of a liquid fuel whose main ingredient is an aliphatic lower alcohol, a flame coloring agent, and a eutectic agent for the flame coloring agent.