201 results about "Phenolphtaleine" patented technology

Disclosed herein is a method for producing a 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine. The method comprises forming a reaction mixture comprising at least one substituted or unsubstituted phenolphthalein compound, at least one substituted or unsubstituted primary hydrocarbyl amine, and an acid catalyst; and heating the reaction mixture to form 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine. An adduct of the 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine is formed either by using an excess of the primary hydrocarbyl amine in the first heating step, or by isolating crude 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine after the heating step and then reacting with a further amount of the primary hydrocarbyl amine. The 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine has a formula:where R1 is selected from the group consisting of a hydrogen and a hydrocarbyl group, and R2 is selected from the group consisting of a hydrogen, a hydrocarbyl group, and a halogen.

The invention discloses a bifidobacterium bifidum capable of significantly alleviating constipation and an application thereof, belonging to the technical field of microbes. Bifidobacterium bifidum CGMCC NO.13632 provided by the present invention can well tolerate simulated gastrointestinal fluid, can well adhere to colon cancer cell HT‑29, and can significantly improve the feces water content and Shorten the time of the first black stool; in terms of improving the propulsion rate of the small intestine, Bifidobacterium bifidum CGMCC NO.13632 of the present invention is superior to the laxative phenolphthalein, showing the best effect, while significantly improving the pathological indicators of constipation, it also regulates the The secretion of constipation-related gastrointestinal regulatory peptides in serum does not have the toxic and side effects of drugs for treating constipation, so it is the first choice for the prevention and treatment of constipation. The bifidobacterium bifidum CGMCC NO.13632 is used to prepare a medicinal composition and fermented food for relieving constipation, and has very broad application prospects.

The invention discloses a hydrophilic polyaryletherketone blended hollow fiber ultrafilter membrane and a preparation method thereof. The preparation method comprises that phenolphthalein polyaryl ether ketone and high-molecular weight polyvinylpyrrolidone are used as main membrane-preparation materials; a membrane casting liquid is prepared by a solution blending method; a hollow fiber ultrafilter membrane is prepared by a dry-wet phase inversion technology; and the hydrophilic polyaryletherketone blended hollow fiber ultrafilter membrane having lasting hydrophily is prepared by hydrophilic effect-persistence aftertreatment. The preparation method has simple processes, is convenient for operation, does not need special equipment and is conducive to industrial production and application. The hydrophilic polyaryletherketone blended hollow fiber ultrafilter membrane obtained by the preparation method has high temperature resistance, chemical solvent resistance, acid and basic corrosion resistance, and lasting, stable and excellent hydrophily. In oil-containing waste water treatment, the hydrophilic polyaryletherketone blended hollow fiber ultrafilter membrane has high membrane flux, obvious oil removal effects and strong oil pollution resistance and is suitable for high-efficiency treatment on oil-containing waste water.

This invention relates to a curative composition and its use in curing epoxy resins and prepregs, adhesives and moulded materials derived therefrom. The curative composition comprises a clathrate comprising a host component and a guest component, the host comprising a carboxylic acid or ester compounds as defined or phenolphthalin and the guest comprising an imidazole or imidazoline component.