乙酸钙

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The rosuvastatin potassium salt obtained is further treated with mixture of toluene and ethyl acetate followed by treatment with suitable calcium source like calcium chloride, calcium acetate, calcium hydroxide and the like. In particular, calcium acetate is used to obtain rosuvastatin calcium salt. The isolated rosuvastatin calcium is in amorphous form.

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a 25 ml Erlenmeyer flask, equipped with a magnetic stirrer, was added 0.5 g L-galactose, 5 ml water, 0.2 g calcium hydroxide, and 22 mg calcium acetate. The mixture was stirred. After 2 hours, the solution was filtered to collect the calcium hydroxide-L-tagatose complex that had formed. The sticky complex was resuspended in 5 mL of H2O, and CO2 was bubbled through the slurry until the pH was below 7. The solution, after filtering off the calcium carbonate, was deionized as in Example 1 and concentrated in vacuo to a syrup which, after seeding with a few L-tagatose crystals, provided 0.22 g of pure L - tagatose, a 44 % yield. To a 25 ml Erlenmeyer flask, equipped with a magnetic stirrer the solution was filtered to collect the calcium hydroxide-L-tagatose complex that had formed CO2 was bubbled through the slurry until the pH was below 7 The solution, after filtering off the calcium carbonate concentrated in vacuo to a syrup which

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: After precisely 4 minutes, 150 μl. of starting reagent, consisting of 1.1 mmole/litre Chromozym® TH (Tos-Gly-ProArg-pNA) and 100 mmole/litre calcium acetate, are added thereto and at 405 nm there is determined in a photometer the time until a definite amount of substrate is reacted by newly formed thrombin to give Tos-Gly-Pro-Arg and p-nitroaniline (pNA). The amount of reacted substrate, which is measured, is defined by a threshold extinction value (for example ΔE=0.2). are added is reacted by newly formed thrombin

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Catalyst A was prepared by adding an aqueous solution of dipotassium hydrogen phosphate (1.0 mole) with vigorous stirring to an aqueous solution of calcium acetate (1.67 moles) to obtain a calcium phosphate gel having a Ca/P atomic ratio of 1.67. After standing overnight, the gel was recovered by filtration and washed by slurrying in a 3500 ml portion of water and filtered. The wash treatment was done three times. Finally, the filter cake was additionally washed by pulling 10 liters of distilled water through it. About 1/4 of the wet cake was reslurried in 1000 ml of distilled water and to the stirred slurry was added 16 g of barium nitrate dissolved in 300 ml of distilled water. The mixture was allowed to stand for 2 days with occasional stirring. Then to the well-stirred slurry was slowly added a mixture of 145 g nickel nitrate and 16 g barium nitrate dissolved in 600 ml of hot distilled water and 100 g potassium carbonate dissolved in 250 ml of distilled water. The resulting mixture was filtered to obtain a cake which was reslurried in about 3500 ml of distilled water and filtered. This operation was repeated and finally about 3 liters of distilled water was pulled through the filter cake. The cake was dried overnight at 220° F, crushed to pass a 40 mesh screen and calcined in air at 800° F for 3 hours. The cooled product was mixed with 3 weight percent polyethylene powder and pilled to 1/8-inch size at 100 psig. The pills were heated at about 800° F in hydrogen for about 20 minutes to obtain the finished catalyst. This invention catalyst, as analyzed, contained 16.3 weight percent barium and 26.9 weight percent nickel based on the total weight of the catalyst composite. The surface area of the catalyst was about 80 square meters per gram, as determined by nitrogen absorption, the pore volume was about 0.2 ml per gram as determined by water absorption, and the apparent bulk density was 0.94 gram per ml.

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 290.8 g (0.5 mol) stearyl monocitrate (obtained as described in 1) were dissolved in 650 ml acetone and 88 g (0.5 mol) calcium acetate were dissolved in 650 ml water. The two solutions were combined and treated as described in 1). 278.3 g (88.6% of the theoretical) of the calcium soap were obtained in the form of a colorless powder. Elemental analysis: treated

反应条件: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A solution of 313.5 g (1.98 mol) calcium acetate in 1000 ml water was added to a solution of 570 g (1.98 mol) dodecenyl succinic anhydride in 1000 ml isopropanol. The mixture was then heated to 90° C., left at that temperature for 1.5 h and then concentrated in a water jet vacuum. The residue was dried in vacuo in a drying cabinet at 100° C. 680 g of the calcium soap were obtained in the form of a colorless powder. concentrated in a water jet vacuum The residue was dried in vacuo in a drying cabinet at 100° C

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: In formulae (XVII), (XVIII), (XIX), (XX) and (VII), Ar1, Ar2, Ar3, Ar4, R1, a and n have the same meaning as described above. A 2-acetylformylbenzofuran compound represented by formula (XVII) (1.0 equivalent) and a hydrazine reagent represented by formula (XVIII) (0.95 to 1.00 equivalent) are heated and stirred in an organic solvent, such as ethanol, methanol, tetrahydrofuran, 1,4-dioxane and acetonitrile, to which a catalyst (0.001 to 0.01 equivalent), such as acetic acid, potassium acetate, calcium acetate and sodium acetate, is added, at about 40 to 50° C. for about 3 to 10 hours, so as to obtain a 2-acetylbenzofuran-monohydrazone compound represented by formula (XIX). are heated

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: This invention relates to a process for recovering calcium formate, propionate or acetate from biomass. According to the invention, a cellulose-, hemicellulose- or starch-containing biomass is subjected to rapid pyrolysis to obtain a crude product containing an aqueous phase and an organic phase. The product obtained, preferably as the aqueous phase, is then distilled to produce a distillate containing at least one acid selected from acetic acid, formic acid and propionic acid as well as their esters and formaldehyde. An alkaline source of calcium is added to this distillate to adjust the pH to an alkaline level sufficient to hydrolyze the esters, cause at least partial oxidation of the formaldehyde and prevent volatilization of acetate, formate or propionate ions as acetic acid, formic acid or propionic acid respectively. For this purpose, the pH is adjusted to a level sufficient to prevent volatilization of acetate, formate or propionate as acetic acid, formic acid or propionic acid respectively. The pH is preferably above 7, but preferably sufficiently low as to avoid residual unreacted alkaline calcium in the calcium salt. A pH range of 7.8 to 8.0 is particularly preferred. This pH adjusted alkaline liquid is then subjected to a further distillation to remove water and volatile organic components and produce at least one of calcium acetate, calcium formate and calcium propionate as solid residue. containing an aqueous phase The product obtained, preferably as the aqueous phase is then distilled to produce a distillate containing at least one acid is then subjected to a further distillation to remove water and volatile organic components

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: This invention relates to a process for recovering calcium formate, propionate or acetate from biomass. According to the invention, a cellulose-, hemicellulose- or starch-containing biomass is subjected to rapid pyrolysis to obtain a crude product containing an aqueous phase and an organic phase. The product obtained, preferably as the aqueous phase, is then distilled to produce a distillate containing at least one acid selected from acetic acid, formic acid and propionic acid as well as their esters and formaldehyde. An alkaline source of calcium is added to this distillate to adjust the pH to an alkaline level sufficient to hydrolyze the esters, cause at least partial oxidation of the formaldehyde and prevent volatilization of acetate, formate or propionate ions as acetic acid, formic acid or propionic acid respectively. For this purpose, the pH is adjusted to a level sufficient to prevent volatilization of acetate, formate or propionate as acetic acid, formic acid or propionic acid respectively. The pH is preferably above 7, but preferably sufficiently low as to avoid residual unreacted alkaline calcium in the calcium salt. A pH range of 7.8 to 8.0 is particularly preferred. This pH adjusted alkaline liquid is then subjected to a further distillation to remove water and volatile organic components and produce at least one of calcium acetate, calcium formate and calcium propionate as solid residue. containing an aqueous phase The product obtained, preferably as the aqueous phase is then distilled to produce a distillate containing at least one acid is then subjected to a further distillation to remove water and volatile organic components

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Calcium salts, such as calcium acetate, calcium formate or calcium proprionate, are obtained from aqueous liquors derived from the pyrolysis of lignocellulosic biomass containing cellulose, hemicelluloses or starch. The above biomass is subjected to rapid pyrolysis to obtain a crude product containing an aqueous phase and an organic phase. The product obtained, preferably as the aqueous phase, is then distilled to produce a distillate containing at least one acid selected from acetic acid, formic acid and propionic acid as well as their esters and formaldehyde. An alkaline source of calcium is added to this distillate to adjust the pH to an alkaline level sufficient to hydrolyze the esters, cause at least partial oxidation of the formaldehyde and prevent volatilization of acetate, formate or propionate ions as acetic acid, formic acid or propionic acid respectively. This pH adjusted alkaline liquid is then subjected to a further distillation to remove water and volatile organic components and produce at least one of calcium acetate, calcium formate and calcium propionate as solid residue. to obtain a crude product containing an aqueous phase The product obtained, preferably as the aqueous phase is then distilled to produce a distillate containing at least one acid is then subjected to a further distillation to remove water and volatile organic components

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: Calcium salts, such as calcium acetate, calcium formate or calcium proprionate, are obtained from aqueous liquors derived from the pyrolysis of lignocellulosic biomass containing cellulose, hemicelluloses or starch. The above biomass is subjected to rapid pyrolysis to obtain a crude product containing an aqueous phase and an organic phase. The product obtained, preferably as the aqueous phase, is then distilled to produce a distillate containing at least one acid selected from acetic acid, formic acid and propionic acid as well as their esters and formaldehyde. An alkaline source of calcium is added to this distillate to adjust the pH to an alkaline level sufficient to hydrolyze the esters, cause at least partial oxidation of the formaldehyde and prevent volatilization of acetate, formate or propionate ions as acetic acid, formic acid or propionic acid respectively. This pH adjusted alkaline liquid is then subjected to a further distillation to remove water and volatile organic components and produce at least one of calcium acetate, calcium formate and calcium propionate as solid residue. to obtain a crude product containing an aqueous phase The product obtained, preferably as the aqueous phase is then distilled to produce a distillate containing at least one acid is then subjected to a further distillation to remove water and volatile organic components

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A calcium acetate salt dispersion was prepared by mixing 11.9 parts of acetic acid, 1316.3 parts of water, and 263.2 parts hydrated lime at 20° C. The resulting dispersion had a beige color and separated upon standing, i.e. without agitation. separated