The presence of certain impurities in diphenyl sulfone have a deleterious effect on the properties of the poly(aryletherketone)s produced therein, including one or more of color, melt stability, molecular weight, crystallinity, etc. and here identify those impurities and provide processes for the recovery of the diphenyl sulfone.

The presence of certain impurities in diphenyl sulfone have a deleterious effect on the properties of the poly(aryletherketone)s produced therein, including one or more of color, melt stability, molecular weight, crystallinity, etc. and here identify those impurities and provide processes for the recovery of the diphenyl sulfone.

A process for recovering alkali from power boiler ash is provided. The power boiler ash is first contacted with Na.sub.2CO.sub.3 to produce a mixture containing settling and non-settling solid particles. A fraction of the settling particles is then separated from the mixture to produce a first clarified alkaline solution. The first clarified alkaline solution contains species such as NaOH and KOH depending upon the power boiler ash characteristics. The non-settling solid particles may optionally be further separated from the first clarified alkaline solution to obtain a second clarified alkaline solution. This process is also applicable for the extraction of alkali from other oxide/hydroxide containing materials.

Disclosed are thermal energy storage systems and methods that utilize metal carbonate eutectics that can undergo high temperature reversible reactions to form mixtures of metal oxides. The metal oxides undergo an exothermic reaction with carbon dioxide to form the molten metal carbonate eutectics, and the molten metal carbonate eutectics undergo an endothermic decarbonization reaction to form the metal oxides and carbon dioxide. By carrying out the reversible reactions at a temperature above the melting point of the carbonate eutectic, the systems provide high thermal conductivity and reversible stability for thermal energy storage.

Disclosed are thermal energy storage systems and methods that utilize metal carbonate eutectics that can undergo high temperature reversible reactions to form mixtures of metal oxides. The metal oxides undergo an exothermic reaction with carbon dioxide to form the molten metal carbonate eutectics, and the molten metal carbonate eutectics undergo an endothermic decarbonization reaction to form the metal oxides and carbon dioxide. By carrying out the reversible reactions at a temperature above the melting point of the carbonate eutectic, the systems provide high thermal conductivity and reversible stability for thermal energy storage.

Effluent water is combined with carbon dioxide sourced from a carbon dioxide-containing emission stream to produce a reaction solution. The pH of the reaction solution is controlled to induce precipitation of a carbonate salt from the reaction solution.

Disclosed are an additive raw material composition and an additive for superhard material product, a composite binding agent, a superhard material product, a self-sharpening diamond grinding wheel and a method for manufacturing the same. The raw material composition consisting of components in following mass percentage: Bi.sub.2O.sub.3 25%˜40%, B.sub.2O.sub.3 25%˜40%, ZnO 5%˜25%, SiO.sub.2 2%˜10%, Al.sub.2O.sub.3 2%˜10%, Na.sub.2CO.sub.3 1%˜5%, Li.sub.2CO.sub.3 1%˜5%, MgCO.sub.3 0%˜5%, and CaF.sub.2 1%˜5%. The composite binding agent is prepared from the additive and a metal composite binding agent. The self-sharpening diamond grinding wheel prepared from the composite binding agent has high self-sharpness, high strength, and fine texture, is uniformly consumed during the grinding process, does not need to be trimmed during the process of being used, and maintains good grinding force all the time, fundamentally solving the problems of long trimming time and high trimming cost of the diamond grinding wheel (FIG. 1).

Disclosed are an additive raw material composition and an additive for superhard material product, a composite binding agent, a superhard material product, a self-sharpening diamond grinding wheel and a method for manufacturing the same. The raw material composition consisting of components in following mass percentage: Bi.sub.2O.sub.3 25%˜40%, B.sub.2O.sub.3 25%˜40%, ZnO 5%˜25%, SiO.sub.2 2%˜10%, Al.sub.2O.sub.3 2%˜10%, Na.sub.2CO.sub.3 1%˜5%, Li.sub.2CO.sub.3 1%˜5%, MgCO.sub.3 0%˜5%, and CaF.sub.2 1%˜5%. The composite binding agent is prepared from the additive and a metal composite binding agent. The self-sharpening diamond grinding wheel prepared from the composite binding agent has high self-sharpness, high strength, and fine texture, is uniformly consumed during the grinding process, does not need to be trimmed during the process of being used, and maintains good grinding force all the time, fundamentally solving the problems of long trimming time and high trimming cost of the diamond grinding wheel (FIG. 1).

The present invention relates to a diluted solution for measuring free steroids in blood and a method for measuring free steroids using the same, and more particularly, to a method for preparing a diluted blood sample for measuring free steroids in blood and a composition for blood sample dilution solution.

In the method for preparing a diluted blood sample for measuring free steroids in blood of the present invention, it was confirmed that physiologically active free cortisol could be evaluated with the cortisol enzyme immunoreaction detection kit without additional sample pretreatment by removing cortisol which is present by binding to excess albumin and cortisol-specific corticosteroid-binding globulin (CBG) contained in serum using a protein precipitation and neutralizing agent. In addition, by selectively removing the protein in the blood sample, it is possible to measure low molecular weight compounds, including steroids, which are strongly bound to proteins in the blood, such as cortisol, in free form.

Therefore, the method of the present invention can be applied simply and effectively to medical sites requiring blood tests for disease diagnosis, monitoring of free cortisol before and after surgery, and emergency patients.

The present invention relates to a diluted solution for measuring free steroids in blood and a method for measuring free steroids using the same, and more particularly, to a method for preparing a diluted blood sample for measuring free steroids in blood and a composition for blood sample dilution solution.

In the method for preparing a diluted blood sample for measuring free steroids in blood of the present invention, it was confirmed that physiologically active free cortisol could be evaluated with the cortisol enzyme immunoreaction detection kit without additional sample pretreatment by removing cortisol which is present by binding to excess albumin and cortisol-specific corticosteroid-binding globulin (CBG) contained in serum using a protein precipitation and neutralizing agent. In addition, by selectively removing the protein in the blood sample, it is possible to measure low molecular weight compounds, including steroids, which are strongly bound to proteins in the blood, such as cortisol, in free form.

Therefore, the method of the present invention can be applied simply and effectively to medical sites requiring blood tests for disease diagnosis, monitoring of free cortisol before and after surgery, and emergency patients.