53 results about "Trituration" patented technology

Disclosed herein is a method for producing a purified 2-aryl-3,3-bis(4-hydroxyaryl) phthalimidine of formula (I)wherein R1 is hydrogen or a C1-25 hydrocarbyl group and R2 is a hydrogen, a C1-25 hydrocarbyl group, or a halogen, and wherein the method comprises dissolving a crude phthalimidine compound in an aqueous base solution; precipitating the dissolved, crude phthalimidine compound from the aqueous base solution by adding an acid in an amount effective to lower the pH of the solution to 9.0 to 12.0, to provide a semicrude phthalimidine compound; and isolating the semicrude phthalimidine compound from the aqueous base solution, to provide the purified 2-aryl-3,3-bis(4-hydroxyaryl)phthalimidine of formula (I), and having a phenolphthalein compound content of less than 2,500 ppm, based on the weight of the purified 2-aryl-3,3-bis(4-hydroxyaryl)phthalimidine. Subsequent trituration with aqueous methanol and recrystallization from isopropanol can result in product having levels of phenolphthalein derivatives that are not detectable.

Disclosed herein is a method comprising reacting a phenolphthalein material and a primary hydrocarbyl amine in the presence of an acid catalyst to form a reaction mixture comprising 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine, wherein the phenolphthalein material comprises greater than or equal to 95 weight percent phenolphthalein, based on the total weight of phenolphthalein material; quenching the reaction mixture and treating the quenched reaction mixture to obtain a first solid. The first solid is then triturated with a trituration solvent and washed to obtain a second solid, wherein the second solid comprises greater than or equal to 97 weight percent 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine, based on the total weight of the second solid. The second solid may be polymerized to form a polycarbonate.

There is provided a sample trituration vessel that even when the sample is relatively hard, enables triturating of the sample easily and with high efficiency. The sample trituration vessel includes a tubular body having an opening at one end and having a bottom part at the other end thereof. The tubular body is furnished with a rugged portion there-inside so as to be able to meet another rugged port formed on a trituration rod. The sample trituration vessel itself can exert shearing effect on the sample. The tubular body is formed of flexible material, and upon application of external force from outside of the tubular body, the tubular body is deformed, thereby breaking down the sample held within the tubular body.

The invention relates to a method for building a konjak finger print; the method adopting a high efficiency liquid phase chromatography includes the following steps: (a) the preparation of a sample: konjak tissues are taken for deactivation of enzymes, drying and trituration and then weighed in a test tube, and the constant volume and filter of the konjak tissues are made by purified water, and the sample undergoes the pre column derivation according to the analysis method for plant amide acids; (b) chromatogram conditions: the high efficiency liquid phase chromatograph or the amino acid analyzer is used, and the chromatographic column uses the octadecylsilane chemically bonded silica as fillers; (c) the detection: the sampling solution is precisely sucked and injected in the high efficiency liquid phase chromatograph, and the finger print is detected and obtained according to the high efficiency liquid phase chromatography. By analyzing the relation between characteristic peaks in the finger print and the breed, the quality, the resistance, the output and the growth state, etc. of the konjak, the invention can provide technical directions for scientific efforts such as the collection and classification of the konjak resource, the breeding selection of new breeds and the research of novel amino acid pesticides for controlling konjak diseases, etc.