Showa Denko K.k.

Keisuke Kishida

Yoshihiro Watanabe

Yoshikuni Okumura

A separating material superior to conventional separating materials, and a separation method are provided, with which 1,3-butadiene is selectively separated and recovered from a mixed gas including 1,3-butadiene and C4 hydrocarbons other than 1,3-butadiene. A metal complex, which comprises a dicarboxylic acid compound (I) (see (I) below) represented by general formula (I), an ion of a metal such as beryllium, and a dipyridyl compound (II) represented by general formula (II), namely L-Z-L (II) (see L below), is characterized by including, as the dipyridyl compound (II), at least two different dipyridyl compounds (II). The metal complex is used as a 1,3-butadiene separating material. Formula (I) L is represented by any of the compounds below.

Metal complex, adsorbent, separating material, and 1, 3-butadiene separation method

A separating material superior to conventional separating materials, and a separation method are provided, with which 1,3-butadiene is selectively separated and recovered from a mixed gas including 1,3-butadiene and C4 hydrocarbons other than 1,3-butadiene. A metal complex, which comprises a dicarboxylic acid compound (I) (see (I) below) represented by general formula (I), an ion of a metal such as beryllium, and a bipyridyl compound (II) represented by general formula (II), namely L-Z-L (II) (see (L) below), is characterized by including, as the dicarboxylic acid compound (I), at least two different dicarboxylic acid compounds (I). The metal complex is used as a 1,3-butadiene separating material. Formula (I) L is represented by any of the compounds below. Formula (L).

1, 3-butadiene separating material, and separation method using said separating material

The invention separating material and separation method make it possible to separate and collect 1,3-butadiene selectively from a mixed gas containing 1,3-butadiene and a Chydrocarbon other than 1,3-butadiene. A separating material capable of adsorbing 1,3-butadiene selectively includes: a dicarboxylic acid compound (I) represented by formula (I) (wherein R, R, Rand Rindependently represent a hydrogen atom, an alkyl group or the like); a metal ion such as a zinc ion and a cobalt ion; and a metal complex having such a structure that multiple pseudo-diamondoid frameworks are intruded mutually, wherein each of the pseudo-diamondoid frameworks comprises an organic ligand (II) that is represented by formula (II) (wherein X represents &#x2014;CH&#x2014;, &#x2014;CH&#x2014;CH&#x2014;, &#x2014;CH&#x2550;CH&#x2014; or the like; and R, R, R, R, R, R, Rand Rindependently represent a hydrogen atom, an alkyl group or the like) and is capable of being bidentately coordinated with the metal ion.

1, 3-butadiene-separating material, and separation method using said separating material

A separation material and method for separating and recovering a target gas from a mixed gas including the target gas and a hydrocarbon gas that has the same number of carbon atoms as the target gas, the target gas being a hydrocarbon gas having 2 or 4 carbon atoms and a carbon-carbon double bond. This gas separation material includes: a metal complex containing a 2,3-pyrazinedicarboxylic acid; an ion of at least one type of metal (M); and an organic ligand (B) capable of bidentate coordination to the metal ion represented by general formula (1) or general formula (2), where (M), formula (1) and formula (2) are as defined herein. The metal complex has a composition represented by MAB where Mis the ion of the metal (M), Ais a 2,3-pyrazinedicarboxylate dianion and B is the organic ligand (B) capable of bidentate coordination to the metal ion.

Gas separation material using metal complex and gas separation method

Provided is a molded article for hydrocarbon adsorption, in which a porous metal complex, the structure of which may vary with adsorption and desorption of gases, can exhibit to a sufficient degree the adsorption and desorption capabilities inherent to the complex. This molded article for hydrocarbon adsorption is characterized by including (A) a metal complex constituted by metal ions, and organic ligands capable of bonding to the metal ions, and (B) a polymer binder component containing within its molecules a total of 0.3 mmol/g to 8.0 mmol/g, inclusive, of at least one functional group selected from group consisting of the carboxyl group, the hydroxyl group, amino groups, the mercapto group, epoxy groups, and the sulfo group.

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Oita, Japan

Keisuke Kishida