JPS5811033A - Coagulation preventing agent for neutral inorganic salts - Google Patents

Abstract

PURPOSE:To prevent the coagulation of neutral inorg. salts effectively by combining >=2 kinds of moisture absorbing and deliquescing agents of different properties as a coagulation preventing agent for said salts. CONSTITUTION:The agents prepd. by adding and compounding >=2 kinds of moisture absorbing and deliquescing agents such as ammonium iron citrate, neopentyl glycol and the like which differ in moisture absorption time, coagulation time, etc. are used for a coagulation preventing agent for neutral inorg. salts such as rock salt, calciun chloride and the like. Then the migration of water between the moisture absorbing agents and the deliquescing agents takes place and the coagulation of the neutral inorg. salts is prevented extremely effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anti-caking agent that prevents various neutral inorganic salts from coagulating.

Neutral inorganic salt cubes, even if they are pure substances, contain various kinds of moisture such as free water and hygroscopic water on their surfaces, and if left undisturbed, these moistures will act as a binder and cause a condensation phenomenon. . This tendency is particularly remarkable when the neutral inorganic salt is unrefined and contains impurities (particularly calcium salts and magnesium salts).

For example, rock salt, which is often used as a raw material for the production of potassium chloride, caustic potash, and potassium carbonate, and also as a non-slip material on frozen roads in winter, need not be taken as an example of unprocessed rock salt. Neutral inorganic salt cubes that are crushed and packed in bags have free water or hygroscopic water on their surface. In these cases, water naturally acts as a binder, causing condensation when the bags are piled up. Furthermore, the coagulation of these salts is affected by the particle size distribution and pattern, and if they reach a close-packed state, the degree of coagulation of the salts will be in the hundreds to 9/cm2, making them extremely difficult to handle. Workability is significantly reduced due to inconvenient lumps. For example, if you leave a 1,000 kg bag of rock salt with a moisture content of 0.4% undisturbed, the longer the days, the more it will solidify. It is well known that even if this rock salt is taken out of the bag and put into the hopper of a processing device, a bridging phenomenon occurs in the hopper.

In other words, if neutral inorganic salts (e.g., rock salt, common salt, calcium chloride, magnesium chloride) used as raw materials for manufacturing inorganic industrial chemicals or reaction test chestnuts have condensed, they must be crushed again, and the inorganic It takes a lot of effort to handle industrial chemicals at a manufacturing plant, leading to high costs.

In addition, when these salts, such as table salt, salt calcined salt, and salt mugs, are spread on frozen roads in winter to melt ice and snow on the road surface, when these salts are spread with a material spreader, etc. If the salt solidifies, the spraying operation will have to stop immediately. In particular, since these spraying operations are often carried out outdoors during snowfall, they are exposed to the influence of outdoor moisture, which further accelerates the coagulation and condensation of salts. It was especially coveted.

The present invention was made in order to meet the needs of the industry and to develop a means for preventing the condensation of neutral inorganic salts. In order to achieve this objective, the inventor of the present invention made extensive research and found that it is possible to mix two or more types of hygroscopic deliquescent agents with different properties such as moisture absorption time and consolidation time with neutral heat (3) machine salts. It was discovered that coagulation of the salts was extremely effectively prevented, and based on this new knowledge, further research was conducted and the present invention was completed.

Although the details of the mechanism are unknown, hygroscopic deliquescent agents enter different states depending on the time it takes to reach water saturation and the conditions after reaching saturation, such as temperature and humidity pressure. When mixed, moisture constantly moves between the moisture absorbent and the deliquescent agent, and it is presumed that this principle is applied to prevent the neutral inorganic salts from coagulating.

The hygroscopic deliquescent agent used in the present invention is any substance that has hygroscopic, adsorbent and/or deliquescent properties, and does not react with or adversely affect neutral inorganic salts. is used as appropriate. Examples include, for example, silica gel, sulfates (e.g. aluminum sulfate), ferrous ammonium citrate, choline chloride, choline bitartrate, choline dihydrogen citrate, choline gluconate, glycols (e.g. neopentyl glycol). Equal alkyl glycol; ethylene glycol, ) (4) Ropylene glycol, trimethylene glycol, 1.4
Alkylene glycols such as -butanediol, 1.5-butanediol; cycloalkyl diols such as cyclopentane 1゜2-diol, cyclohexane 1.2-:)ol, activated carbon, charcoal, etc. It is not limited. If these hygroscopic deliquescent agents are used alone, the intended purpose cannot be achieved, and it is necessary to use two or more of them having different properties such as moisture absorption time and solidification time.

The desiccant deliquescent agent described above can sufficiently achieve the intended purpose when added alone to salts as an anti-caking agent, but an even better effect can be achieved if it is further treated with a surfactant. This treatment is carried out by blending it with a moisture absorbent, mixing it, or coating it. The details of this mechanism will require further research, but as a result of moisture absorption by the desiccant deliquescent agent, the surfactant leaches out to the surface, forming a film of neutral inorganic salts, and this phenomenon further prevents caking. It is estimated that the effect will be stronger.

As the surfactant, various anionic, cationic, amphoteric, and nonionic surfactants, whether synthetic or natural, can be widely used, but natural oil-based surfactants are particularly suitable. . Examples include higher fatty acid alkali salts, alkyl sulfates, alcohol sulfates (e.g. Sannol LPF, LL-103
), polyethylene glycol fatty acid ester, sorbitan fatty acid ester, fatty acid monoglyceride, and the like.

The anticaking agent according to the present invention includes all neutral inorganic salts, such as rock salt, common salt, calcium chloride, magnesium chloride,
It can be widely applied to ammonium chloride, sodium nitrate, sodium sulfate, etc.

According to the present invention, when removing ice and snow from a road surface in winter by removing it from a bag and putting it into a material spreader or the like to spread salt potash, salt mug, table salt, rock salt, etc.,
Due to the high humidity and poor weather conditions, the work process of adding neutral inorganic salts to the material sludge and the process of adding them to the material sludge often require a lot of manual labor. The machine often stops, but this is no longer the case, and the spraying work can be carried out smoothly. The amount of salt to be sprayed in this case will vary depending on the purple color of the snow, but in the case of snow covering about 5 gardens, it is appropriate to spray about 40 y-/m2 of granular salts of about 3 square meters.
According to the present invention, since the salts do not coagulate, the above-mentioned spraying interval can be maintained at all times, and the spraying amount can be freely controlled as needed, and the spraying rate can be uniform and uniform.
can be dispersed. In addition, when these salts are used as raw materials or other materials in the inorganic chemistry industry, fertilizer industry, etc., they do not coagulate in plant pipes or reaction tanks, and reactions occur smoothly. Undesirable phenomena such as ringing and ratholing can also be prevented. Moreover, even if these salts (d) are stored in moisture-proof bags, the storage capacity is
, J04 is long: FL inevitably solidifies in the bag, but the present invention (7) has the remarkable effect of preventing this from happening.

Example 1: 14'5 parts by weight of ferrous ammonium citrate and 628 parts of neopentyl glycol are mixed and coated with 25.9 parts of alcohol sulfate dissolved in 6 parts of water.

Then, it is dried, dehydrated, and pulverized to obtain a powdery anti-caking agent of 80 to 150 mesh.

Here you get: Take 1 part of anti-caking agent, 0.4%~4%
About 85y of 0 parts of water-containing intermediate pulverized food tg I CI O was stirred and mixed in a mixer, and 40#l/c
It is molded into a cylinder of 35φ x 75~80 mm with the soil quality of In2.

Comparative products were prepared using 4% to 4% salt. 0 hours, 24 hours, and 2 weeks after withdrawal of 7g 1
．． The breaking strength was as follows.

(8) Table 1 Example 2 An anti-caking agent was obtained in the same manner as in Example 1 except that 1000 parts of magnesium chloride and hexahydrate were used instead of common salt. This showed excellent results similar to Example 1, but
Furthermore, the amount of anti-caking agents used is decreasing.
6.6 parts of aluminum acid was mixed and coated with 1.60 parts of alcohol sulfur dissolved in 6 parts of water. The results were shown.

Agent Patent Attorney 1) Parent Male

Claims (1)

[Scope of Claims] 1. An anti-caking agent of neutral inorganic salts, characterized by comprising two or more types of hygroscopic deliquescent agents having different properties. 2. The anti-caking agent according to claim 1, wherein the moisture-absorbing deliquescent agent is treated with a surfactant. 6. The anti-caking agent according to claim 2, wherein the surfactant is a natural oil-based surfactant.