34 results about "Nadroparin calcium" patented technology

The invention discloses a production method for nadroparin calcium. Accoding to the production method, heparin sodium is adopted as raw material and subjected to degradation, deoxidation, ethanol precipitation, ion exchange resin calcium conversion, oxidation, filtration, precipitation and dehydration to obtain nadroparin calcium; the one-pot boiling technology is realized through oxidation, sterile filtration, precipitation and dehydration and the simplified operation is realized; compared with the disclosed methods, steps adopted in the heparin sodium preparation technology are fewer, the operation is simpler and more convenient, the calcium conversion is more complete and the yield is higher.

The invention discloses low-molecular-weight heparin derived from sheep, including sheep dateparin sodium, sheep nadroparin calcium, sheep tinzaparin sodium, sheep betaparin sodium and sheep bemiparin sodium. The low molecular weight heparins of sheep origin above all have common provenance characteristics. In terms of chemical structure, the content of the main disaccharide ΔUA2S‑GlcNS6S (ΔIS) is between 66%‑74%. Sheep low-molecular-weight heparin and pig-derived low-molecular-weight heparin have similar physical and chemical properties and biological activities, which expands the source of low-molecular-weight heparin drugs. The preparation method of sheep low-molecular-weight heparin introduced by the invention is simple and easy, and the process is stable. The obtained product is refined and can fully meet the requirements of various pharmacopoeias for the current low-molecular-weight heparin. Sheep low-molecular-weight heparin also has halal properties that porcine-derived low-molecular-weight heparin does not have. It has a huge market in the majority of Muslim populations, countries and regions, and can be used in anticoagulant, antithrombotic, anti-inflammatory, anticancer and halal drugs.

The invention relates to a preparation and purification process for nadroparin calcium. The process comprises the following steps: depolymerization; reduction; recrystallization; chromatography; and filtration. According to the invention, the process can effectively extract a fragment with a narrow molecular weight distribution range; nadroparin calcium is obtained through improvement of a preparation process for low-molecular-weight heparin calcium, an out-dated solvent fractional precipitation method is changed, conditions for anion exchange chromatography are optimized, and the fragment both meeting requirements for molecular weight of LMWH in China and according with molecular weight distribution of nadroparin calcium are obtained through gradient?elution.

The invention relates to the field of medicine synthesis and discloses a preparation method of nadroparin calcium. The method of the invention firstly uses the sodium nitrite method to prepare the low-molecular-weight heparin sodium degradation liquid, and then obtains the reducing liquid through reduction. The reducing solution is filtered, the obtained filtrate is stirred evenly with calcium chloride solution and ultrafiltered, the ultrafiltrate is added with ethanol to precipitate, the precipitate is redissolved with water, filtered, the obtained filtrate is sterilized and freeze-dried to obtain the finished product of nadroparin calcium. The preparation process of the present invention provides a brand-new preparation idea, discards the hydrogen peroxide oxidation in the existing method and the calcium and sodium replacement of the cation exchange resin, integrates the ultrafiltration method and calcium chloride stirring to calcium, and cooperates with other optimizations steps, the ratio of anti-Xa / anti-IIa of nadroparin calcium is improved as a whole, the ratio of weight loss on drying of nadroparin calcium and the ratio of fractions with a molecular weight less than 2000 are improved, the process steps are greatly reduced, and the preparation efficiency is improved.

The invention discloses a method for producing nadroparin calcium from crude heparin sodium. The method uses crude heparin sodium as raw material, pretreatment by salt solution process, oxidation, ion exchange resin adsorption, washing, elution, and finally ultrafiltration and freeze-drying to obtain heparin sodium fine product, which is then depolymerized , reduction, graded alcohol precipitation, calcium transfer, and freeze-drying to obtain nadroparin calcium. The invention has the advantages of controlling the quality of nadroparin calcium from source and process, short production cycle, low production energy consumption and high product quality, and is suitable for large-scale industrial production.

The invention discloses solution concentration of nadroparin calcium determined by phenanthroline-zinc sulfate ultraviolet spectroscopy. Under the environment of buffered solution, Ultraviolet absorbance degrees of mixed solution which includes Zn2+ions, phenanthroline and the nadroparin calcium are determined, and then the concentration of the nadroparin calcium is determined by quantity. According to the solution concentration of the nadroparin calcium determined by the phenanthroline-zinc sulfate ultraviolet spectroscopy, a phenanthroline-zinc sulfate ultraviolet spectroscopy test system is applied, quick quantitative determination of the solution concentration of the nadroparin calcium can be achieved. The linear range of an analytical method of the solution concentration of the nadroparin calcium determined by the phenanthroline-zinc sulfate ultraviolet spectroscopy is 1.184%-16.33%, meanwhile, the analytical method of the solution concentration of the nadroparin calcium determined by the phenanthroline-zinc sulfate ultraviolet spectroscopy has good anti-jamming capability and can be applied in the practical production process of nadroparin calcium medicines and capable of carrying out concentration determination to intermediate product solution or finished product solution.