The invention relates to a compound of following formula (I):

##STR00001##

a preparation process, uses thereof and compositions containing the same, wherein R.sub.1 and R.sub.2, represent, independently of one another, a linear, branched or cyclic, saturated or unsaturated hydrocarbon-based group comprising from 1 to 6 carbon atoms, where the sum of the carbon atoms of the groups R.sub.1 and R.sub.2 ranges from 2 to 7, and where R.sub.1 and R.sub.2 may also form, together and with the carbon atom bearing them, a 6-, 7-, or 8-membered ring; n is an integer of between 1 and 100, limits included; A represents a sequence of one or more units chosen from ethylene oxide, propylene oxide, butylene oxide units and mixtures thereof; the group formed by R.sub.1, R.sub.2 and the carbon atom to which R.sub.1 and R.sub.2 are attached has a degree of branching equal to 0, 1 or 2.

Embodiments relate to a method of producing a modified double metal cyanide complex, a method of producing a monol or polyol that includes providing the modified double metal cyanide complex, an alkylene oxide polymerization process that includes providing the modified double metal cyanide complex, a batch, semi-batch, or continuous manufacturing process that includes providing the modified double metal cyanide complex, and a polyether polyol prepared using the batch, semi-batch, or continuous manufacturing process that includes providing the modified double metal cyanide complex.

Embodiments relate to a method of producing a modified double metal cyanide complex, a method of producing a monol or polyol that includes providing the modified double metal cyanide complex, an alkylene oxide polymerization process that includes providing the modified double metal cyanide complex, a batch, semi-batch, or continuous manufacturing process that includes providing the modified double metal cyanide complex, and a polyether polyol prepared using the batch, semi-batch, or continuous manufacturing process that includes providing the modified double metal cyanide complex.

The present invention relates to a process for preparing a double metal cyanide catalyst (DMC) comprising the reaction of an aqueous solution of a cyanide-free metal salt, an aqueous solution of a metal cyanide salt, an organic complex ligand and a complex-forming component, to form a dispersion, wherein the reaction is effected using a mixing nozzle and wherein the process temperature of the dispersion during the reaction is between 26° C. and 49° C. The subject matter of the invention further encompasses double metal cyanide catalysts (DMC) obtained in accordance with the process according to the invention and also the use of the DMC catalysts for the preparation of polyoxyalkylene polyols.

The present invention relates to a process for preparing a double metal cyanide catalyst (DMC) comprising the reaction of an aqueous solution of a cyanide-free metal salt, an aqueous solution of a metal cyanide salt, an organic complex ligand and a complex-forming component, to form a dispersion, wherein the reaction is effected using a mixing nozzle and wherein the process temperature of the dispersion during the reaction is between 26° C. and 49° C. The subject matter of the invention further encompasses double metal cyanide catalysts (DMC) obtained in accordance with the process according to the invention and also the use of the DMC catalysts for the preparation of polyoxyalkylene polyols.

The disclosure provides a double metal cyanide catalyst, a preparation method and a application method thereof. Besides impurities, there are only two metal elements consisted of zinc and cobalt in the catalyst. The catalyst is obtained by reacting water-soluble metal salts of zinc and cobalt in water-soluble solvents. The catalyst is modified by a mixed acid during synthesis of the catalyst, the mixed acid comprising at least one organic acid and at least one water-soluble inorganic acid. the water-soluble inorganic acid is selected from the group consisting of diluted sulfuric acid and diluted hydrochloric acid, with a pH value being in the range of 0 to 5; and the organic acid is any one or more selected from the group consisting of succinic acid, glutaric acid, phthalic acid, iminodiacetic acid, pyromellitic acid, and 1,2,3,4-butanetetracarboxylic acid.

The disclosure provides a double metal cyanide catalyst, a preparation method and a application method thereof. Besides impurities, there are only two metal elements consisted of zinc and cobalt in the catalyst. The catalyst is obtained by reacting water-soluble metal salts of zinc and cobalt in water-soluble solvents. The catalyst is modified by a mixed acid during synthesis of the catalyst, the mixed acid comprising at least one organic acid and at least one water-soluble inorganic acid. the water-soluble inorganic acid is selected from the group consisting of diluted sulfuric acid and diluted hydrochloric acid, with a pH value being in the range of 0 to 5; and the organic acid is any one or more selected from the group consisting of succinic acid, glutaric acid, phthalic acid, iminodiacetic acid, pyromellitic acid, and 1,2,3,4-butanetetracarboxylic acid.

Prussian blue analog derived catalysts having a composition of highly porous transition metal (“TM”) oxides with nano particle size. Such OER catalysts are synthesized from the PBA, containing cobalt, iron, nickel, copper, manganese, zinc, magnesium etc., as secondary building units (“SBUs”) coordinated by hexacyano-based ligands. Furthermore, the PBA-derived catalysts may also integrated into a highly graphitized carbon network to further improve the conductivity, mass transport and durability against oxidative corrosion.

Prussian blue analog derived catalysts having a composition of highly porous transition metal (“TM”) oxides with nano particle size. Such OER catalysts are synthesized from the PBA, containing cobalt, iron, nickel, copper, manganese, zinc, magnesium etc., as secondary building units (“SBUs”) coordinated by hexacyano-based ligands. Furthermore, the PBA-derived catalysts may also integrated into a highly graphitized carbon network to further improve the conductivity, mass transport and durability against oxidative corrosion.

The present disclosure provides a synthesis method of a g-C.sub.3N.sub.4/C composite material based on a hollyhock stalk, including the following steps: (1) pretreatment of hollyhock stalks; and (2) fabrication of the g-C.sub.3N.sub.4/C composite material. In this method, with the hollyhock stalk as a carbon skeleton, g-C.sub.3N.sub.4 is spread on a template surface to form a laminated layer, and a composite system with a special structure is constructed. Compared with pure phase g-C.sub.3N.sub.4, the composite material substantially increases specific surface area and has a clear interface; the carbon skeleton not only functions as a rigid support, but also increases the electron transfer efficiency of the composite material, thereby improving the separation efficiency of photogenerated carriers and the utilization rate of visible light. Raw materials used in the method are inexpensive and environmentally friendly, which can be used for industrial production and bulk production of eco-friendly materials for harnessing environmental organic pollutants.