Abstract: The present invention discloses a method of separating C8 aromatic hydrocarbon isomers.

Abstract: The present invention provides a method for the adsorptive separation of C2H4 and C2H6 using ultramicroporous metal-organic framework material, comprising the following steps that (1) C2H4/C2H6 mixture is contacted with the ultramicroporous metal-organic framework material; (2) C2H4 is preferentially adsorbed and the separation of C2H4/C2H6 is realized. The described “ultramicroporous metal-organic framework material” has a formula of [M3L3A]?, wherein M represents the metal cation being any one of Cu2+, Zn2+, Co2+, and Ni2+; L represents the organic linker being any one of 1,2,4-triazole and its derivatives; A represents the oxygen-containing inorganic anion being any one of PO43? and VO43?.

Abstract: A method for the separation of C4 olefin mixtures using anion-pillared hybrid porous materials as physical adsorbents is provided. The anion-pillared hybrid porous material was constructed by metal ions (M), organic ligand (L), and inorganic anion (A), forming a three-dimensional structure (A-L-M). C4 olefin mixtures contact with hybrid porous materials in certain ways, then each single C4 olefin monomer can be obtained. The pore size of anion-pillared hybrid porous materials and the spatial configurations of the anions within the pores can be fine-tuned and pre-designed. C4 olefins with different size and shape can be efficiently separated by the anion-pillared hybrid porous materials through shape recognition and size-sieving mechanism.

Abstract: A method of separating acetylene from a gas mixture comprising acetylene is provided. The method involves the use of a hybrid porous material with an affinity for acetylene adsorption. The hybrid porous material comprises a three-dimensional structure of metal species (M) and first and second linker groups (L1 and L2), wherein the metal species (M) are linked together in a first and second direction by first linker groups (L1) and are linked together in a third direction by second linker groups (L2) to form the three-dimensional structure. The hybrid porous materials may have a high selectivity for acetylene and/or a high capacity for acetylene adsorption. The method may be particularly useful for the purification of ethylene gas contaminated with acetylene during an ethylene production/purification process. The method may be particularly useful for the large scale separation of acetylene from other gases such as ethylene and carbon dioxide, during an acetylene production/purification process.

Abstract: A method for the separation of C4 olefin mixtures using anion-pillared hybrid porous materials as physical adsorbents is provided. The anion-pillared hybrid porous material was constructed by metal ions (M), organic ligand (L), and inorganic anion (A), forming a three-dimensional structure (A-L-M). C4 olefin mixtures contact with hybrid porous materials in certain ways, then each single C4 olefin monomer can be obtained. The pore size of anion-pillared hybrid porous materials and the spatial configurations of the anions within the pores can be fine-tuned and pre-designed. C4 olefins with different size and shape can be efficiently separated by the anion-pillared hybrid porous materials through shape recognition and size-sieving mechanism.

Abstract: A method for the adsorption separation of propylene and propyne, comprising selectively adsorbing propyne from a mixed gas of propylene and propyne using an anion-containing metal-organic framework material as an adsorbing agent so as to obtain a purified propylene gas. The anion-containing metal-organic framework material is used as an adsorbing agent in the method, and the adsorbing agent is a kind of highly ordered microporous organic-inorganic hybrid material, with the pore size thereof being adjustable within the range of 0.4-1.2 nm, and the pore volume thereof being adjustable within the range of 0.1-1.2 cm3/g. A large number of anionic active sites and a highly ordered spatial arrangement thereof allow the adsorbing agent to exhibit excellent propyne adsorption properties. Thus, the adsorbing agent has a very high propyne selectivity and adsorption volume.

Abstract: The present invention discloses a process for preparing L-arabinose from Gum Arabic comprising the steps of catalytical hydrolysis of L-arabinose from gum arabic followed by the purification steps including neutralization using alkali, adsorption bleaching, electrodialysis desalination, adsorption separation of impurities and crystallization, with the absolute purity of L-arabinose up to 98% and the recovery as high as 25%˜29% of material weight. The disclosed process has such advantages as low cost, environmental-friendliness and simple operation, showing promising in industrial production.

Abstract: The present invention discloses a process for preparing high-purity raffinose from defatted wheat germ comprising the steps of percolate extraction of raffinose from defatted wheat germ, decoloration by extraction from the abstraction liquid, electrodialysis desalination, impurity removal by simulated moving bed, concentration and crystallization, with the absolute purity of raffinose as high as 98% and the recovery up to 75%. The process is not only reliable and easy to operate, but also easy to realize industrial production and control the parameters.

Abstract: A method of separating acetylene from a gas mixture comprising acetylene is provided. The method involves the use of a hybrid porous material with an affinity for acetylene adsorption. The hybrid porous material comprises a three-dimensional structure of metal species (M) and first and second linker groups (L1 and L2), wherein the metal species (M) are linked together in a first and second direction by first linker groups (L1) and are linked together in a third direction by second linker groups (L2) to form the three-dimensional structure. The hybrid porous materials may have a high selectivity for acetylene and/or a high capacity for acetylene adsorption. The method may be particularly useful for the purification of ethylene gas contaminated with acetylene during an ethylene production/purification process. The method may be particularly useful for the large scale separation of acetylene from other gases such as ethylene and carbon dioxide, during an acetylene production/purification process.

Abstract: A method for the adsorption separation of propylene and propyne, comprising selectively adsorbing propyne from a mixed gas of propylene and propyne using an anion-containing metal-organic framework material as an adsorbing agent so as to obtain a purified propylene gas. The anion-containing metal-organic framework material is used as an adsorbing agent in the method, and the adsorbing agent is a kind of highly ordered microporous organic-inorganic hybrid material, with the pore size thereof being adjustable within the range of 0.4-1.2 nm, and the pore volume thereof being adjustable within the range of 0.1-1.2 cm3/g. A large number of anionic active sites and a highly ordered spatial arrangement thereof allow the adsorbing agent to exhibit excellent propyne adsorption properties. Thus, the adsorbing agent has a very high propyne selectivity and adsorption volume.

Abstract: The present invention discloses a process for preparing high-purity raffinose from defatted wheat germ comprising the steps of percolate extraction of raffinose from defatted wheat germ, decoloration by extraction from the abstraction liquid, electrodialysis desalination, impurity removal by simulated moving bed, concentration and crystallization, with the absolute purity of raffinose as high as 98% and the recovery up to 75%. The process is not only reliable and easy to operate, but also easy to realize industrial production and control the parameters.

Abstract: The present invention discloses a process for preparing L-arabinose from Gum Arabic comprising the steps of catalytical hydrolysis of L-arabinose from gum arabic followed by the purification steps including neutralization using alkali, adsorption bleaching, electrodialysis desalination, adsorption separation of impurities and crystallization, with the absolute purity of L-arabinose up to 98% and the recovery as high as 25%˜29% of material weight. The disclosed process has such advantages as low cost, environmental-friendliness and simple operation, showing promising in industrial production.