JPS63167198A - Conveying method for carbon monoxide - Google Patents

Abstract

PURPOSE:To convey a large amount of carbon monoxide under the normal pressure or the pressure equal to or below 10 atmospheric pressure, by transporting a vessel, which is charged with a solid adsorbent adsorbing and storing carbon monoxide under a normal pressure or under the pressurized state, by means of an ordinary conveying means. CONSTITUTION:A solid carbon monoxide adsorbent (called 'dsorbent' hereinafter) activated beforehand is charged in a carbon monoxide conveying vessel (called 'vessel' hereinafter) without losing its activity. Following this, high purity carbon monoxide is fed into the vessel to be adsorbed by adsorbent. The adsorption is operated in the vessel inside under the normal pressure or pressurized state. When carbon monoxide adsorption by the adsorbent reaches a balanced state, charging of carbon monoxide is ceased. The vessel adsorbing and storing this carbon monoxide is transported by means of an ordinary conveying means to a place where the carbon monoxide is used. In this manner, a large amount of carbon monoxide is transported under the normal pressure or pressure equal to or below 10 atmospheric pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for transporting carbon monoxide.

[Conventional technology]

Carbon monoxide is a basic raw material for synthetic chemistry, and when it is transported from the production site to any location, except when transported by pipeline, it is usually the same as for oxygen, nitrogen, and hydrogen. High-pressure containers (cylinders) are filled with high pressures of tens of atmospheres or more and transported.However, this method involves handling high-pressure gas, which not only increases the weight of the container but also poses dangers to the work. Therefore, it is subject to regulations under the High Pressure Gas Control Law.

[Problem that the invention seeks to solve]

If carbon monoxide can be transported at a pressure of 10 atmospheres or less, which is not subject to the High Pressure Gas Control Law, the container will be lighter and easier to transport. However, it is impossible to transport a large amount of carbon monoxide simply by lowering the pressure.

In general, as a method of transporting gas, in addition to the transport method using a high-pressure container, it is possible to transport the gas by lowering it into a liquid such as propane gas. Without it, it would not liquefy and would not be of practical use.

[Means for solving problems]

As a result of repeated studies on means of transporting large amounts of carbon monoxide gas at normal pressure or at a low pressure of 10 atmospheres or less, the present inventors developed a solid adsorbent that has the property of adsorbing and desorbing carbon monoxide in a container. A method has been developed for transporting carbon monoxide gas by filling the container, adsorbing and storing carbon monoxide under normal pressure or under pressurized pressure of 10 atmospheres or less, and transporting the container using ordinary transport means.

[Structure of the invention]

The present invention involves filling a container with a solid adsorbent that has the property of adsorbing and desorbing carbon monoxide, adsorbing and storing carbon monoxide under normal pressure or under pressure of 10 atmospheres or less, and transporting the container by ordinary transportation means. This is a method of transporting carbon monoxide gas by transporting it.

That is, a solid carbon oxide adsorbent (hereinafter referred to as "adsorbent") activated in advance is filled into a carbon monoxide transport container (hereinafter referred to as "container") without being deactivated. The container is provided with an adsorbent filling port, which is normally closed, and a gas inlet and outlet, which can be opened and closed by a valve or the like.

When filling with carbon monoxide gas, high-purity carbon monoxide is fed into the container from the gas inlet and adsorbed onto the adsorbent. This adsorption operation is carried out under normal pressure or pressurization inside the container. In order to increase the amount of carbon monoxide filled in the container, it is preferable to operate under pressure, but if the pressure is 10 atmospheres or more, it will be regulated by the High Pressure Gas Control Law, so it is preferable to set the pressure to 10 atmospheres or less. Of course, if a container that complies with the High Pressure Gas Control Law is used, it is possible to transport several times the amount of carbon monoxide compared to conventional methods.

When the adsorption of carbon monoxide by the adsorbent reaches equilibrium, the supply of carbon monoxide is stopped and the valve at the inlet of the container is closed.

The container in which the carbon oxide is adsorbed and stored is transported to the place where the carbon monoxide is used by a normal transportation method. - When using carbon oxide, depressurize the inside of the container, heat the container, or lower the partial pressure of carbon monoxide in the container to desorb the carbon monoxide adsorbed by the adsorbent and remove it from the container. Take it out and use it.

In the present invention, the adsorbent filled in the container has the ability to adsorb carbon oxide, and has the ability to desorb carbon monoxide in a nearly reversible state by reducing pressure, heating, or lowering the partial pressure of carbon monoxide. Any adsorbent can be used.

In particular, as an adsorbent having a high ability to adsorb carbon oxide, a complex adsorbent in which metal ions having coordination ability are dispersedly supported on a carrier is preferable. Such metals include Cu, AI,
Ag, Ni, Mn, Rh.

There are Fe, etc., and it is halogenated! (1), halogenated steel (
II) or their combination with aluminum halides, especially copper(I) chloride, steel(II) chloride or their combination with aluminum chloride. On the other hand, as carriers, activated carbon such as charcoal, caking coal, and coconut shell charcoal, crosslinked polystyrene made by copolymerizing styrene and styrene derivatives with divinylbenzene, and 1,2° tertiary amino Ion exchange resins into which substituents having groups have been introduced, as well as zeolites, activated alumina, etc. 1 can be used. Among them, chloride steel(I)-activated carbon system, copper(II) chloride-activated carbon system, copper chloride CI) aluminum-activated carbon system, copper(I) chloride-aluminum-crosslinked polystyrene system, copper(I) chloride-ion exchange resin system Adsorbents such as the following are particularly preferred because they have excellent adsorption and desorption properties.

An example of a method for manufacturing these adsorbents is to combine the above metal compounds with water, an inorganic solvent such as hydrochloric acid, nitric acid, or ammonia, or with formic acid, acetic acid, methylene chloride, carbon disulfide, toluene, chloroform, carbon tetrachloride, dichloroethane, or trichloroethane. , tetrachloroethane, tetrachloroethylene, cyclohexane, decalin, acetonitrile, or other organic solvent to prepare a solution. Next, a carrier is introduced into this solution, and the solution is impregnated into the carrier under normal pressure or reduced pressure, preferably 100 Torr or less. After impregnation, the solvent is distilled off by a method such as passing pressure or heating to obtain an adsorbent, and if necessary, an activation treatment can be performed after this. In the activation treatment, the adsorbent from which the solvent has been distilled off is heated with He or Ar.

N2. N2. In an atmosphere of an inert gas such as Co or a reducing gas, the temperature is 80°C or higher, preferably 150-3
This is done by heating at a temperature of 00°C.

(Example〕 The present invention will be explained in more detail with reference to Examples below.

Example 1 120 g of copper chloride (I) and 500 g of 3N hydrochloric acid in a glass container
ml was added and dissolved with stirring under a nitrogen atmosphere to prepare a copper chloride hydrochloric acid solution. Next, use commercially available activated carbon in the heating distillation equipment.
200 g of 10 mesh crushed product was loaded and degassed at 3 Torr using a vacuum pump. The prepared copper chloride hydrochloric acid solution was injected into this distillation apparatus, and the inside of the apparatus was heated for 3 hours.
After maintaining the mixture under reduced pressure of Torr, it was heated to 160° C. to remove hydrochloric acid, thereby obtaining a black granular copper (I) chloride-activated carbon adsorbent.

Solid adsorbent 1 prepared in a container filled with content f4245ml
60 g of the container was loaded and activated at 250''C in a nitrogen stream for 1 hour, then air-cooled to maintain the inside of the container at 25°C.

Next, carbon monoxide with a purity of 99% or higher was passed into the container, and when the pressure inside the container reached 9 Kg/cm2 (gauge pressure), the supply of carbon monoxide was temporarily stopped. After a while, the pressure inside the container gradually decreased, so carbon oxide was supplied each time to maintain the pressure inside the container. In this way, the supply of carbon monoxide was stopped when the internal pressure reached equilibrium at 9 Kg/cm2-G. Thereafter, carbon monoxide was desorbed under each desorption condition shown in Table 1, and the amount of -carbon oxide recovered was determined.

Comparative Example 1 A filled container with an internal volume of 245 m1 kept at 25°C was filled with carbon monoxide at a pressure of 9 Kg/cm2-G without loading a solid adsorbent, and then carbon monoxide was recovered at 70°C and 100 Torr. I did it. The results are also shown in Table 1.

Example 2 140 g of aluminum chloride 105 g of copper(I) chloride 1 polystyrene resin (80 mo1% styrene and 20 m of divinylbenzene) while flowing dry nitrogen into a glass container
20-50 mesh beads of o1% copolymer) 13
0 g of carbon disulfide was added thereto, and 500 ml of carbon disulfide was added thereto, and the mixture was heated to reflux with occasional stirring. Thereafter, the pressure was reduced to 4 Torr for 8 hours while stirring at room temperature to sufficiently remove carbon disulfide to obtain a reddish-brown adsorbent.

140 g of the prepared adsorbent was loaded into a filled container with an internal capacity of 245 ml while flowing dry nitrogen. Next, after purging the nitrogen gas in the vessel with carbon monoxide, adsorption and desorption of carbon monoxide was performed under the same conditions as in Example 1. The results are shown in Table 2.

Example 3 Chlorinated steel (I) 120 in a glass container under dry nitrogen flow
100 g of an ion exchange resin having primary and primary and secondary amino groups and 10,100 O of a water-acetonitrile mixed solvent at a volume ratio of 1:1 were added and stirred for 6 hours. Thereafter, the pressure inside the vessel was reduced to 5 Torr and heated to 80°C, and the liquid phase was sufficiently removed to obtain a white-green adsorbent.

140 g of the prepared adsorbent was loaded into a container with an internal capacity of 245 ml while flowing dry nitrogen. Next, after purging the nitrogen gas in the vessel with carbon monoxide, carbon monoxide was adsorbed and desorbed under the conditions shown in Table 3.

〔Effect of the invention〕

According to the method for transporting carbon monoxide using a container filled with the carbon monoxide adsorbent of the present invention, the amount of carbon monoxide in Example 1 is 6 times that of the case where no solid adsorbent is filled, and the amount of carbon monoxide is 5 times that of Example 2. of carbon monoxide can be transported under the same conditions. Even in Example 3, which had a relatively low amount of desorption, it was possible to transport an amount of 140 g of adsorbent, demonstrating the superiority of the method of the present invention.

representative patent applicant Kyushu Firebrick Co., Ltd.

Claims (1)

[Claims] A container is filled with a solid adsorbent that has the property of adsorbing and desorbing carbon monoxide, and carbon monoxide is adsorbed and stored under normal pressure or pressurization, and the container is transported by ordinary transportation means. How to transport carbon monoxide.