aleic anhydride (C08F22/06)

Improved solvent for extraction of maleic anhydride from gas stream // 2607762
FIELD: chemistry.SUBSTANCE: invention relates to methods of producing raw maleic anhydride. In particular, method includes steps where: reactor output stream, containing maleic anhydride, is fed into bottom part of absorption column, where it comes into contact with a non-cyclic solvent, that is fed close to its upper part and is a diester, having a boiling point under normal conditions between 250C and 350C, solubility of fumaric acid at least 0.06 wt% at temperature of 60C, solubility of maleic anhydride at least 10 wt% at temperature of 60C, water solubility not higher than 100 mg/l, density, different from water density at least to 0.020 g/ml, and a water-soluble hydrolysis product with molecular weight not higher than that of pentanol, with transfer of maleic anhydride of outlet stream of reactor into a solvent, wherein gas stream to be extracted is blown off from absorption column, and enriched solvent, containing maleic anhydride, is removed from absorption column near bottom of absorber and directed into flash tower near its middle part, untreated maleic anhydride is removed from stripping column near its middle or upper part.EFFECT: methods make it possible to use cheaper solvent than phthalates.11 cl, 1 dwg, 1 tbl

Platinum nanocompounds and methods of applying thereof // 2538199
FIELD: chemistry.SUBSTANCE: invention relates to bio-compatible conjugated polymer nanoparticle, dicarbonyl-lipid compound, compound in form of vesicles, micelles or liposomes, containing multitude of nanoparticles, including said dicarbonyl-lipid compound, method of treating cancer or metastases, biocompatible polymer, as well as to conjugate. Biocompatible conjugated polymer nanoparticle includes main chain of copolymer, with at least one polymer monomer containing two side chains, selected from the group, consisting of carboxylic acid, amide and ester, and sad side chains are separated from each other by 1-1- carbon atoms, oxygen atoms or sulphur atoms, or their any combinations. Said nanoparticle further contains multitude of side chains, covalently bound with said main chain, with said side chains being selected from the group, consisting of monosaccharides, dicarboxylic acids, polyethyleneglycol and their combinations; and multitude of platinum compounds, dissociatedly bound with said main chain. Multiple platinum compounds are connected with said main chain via at least one coordination bond between carbonyl oxygen of carbonyl or amide group of main chain and platinum atom of platinum compound. Said platinum compound is selected from Pt(II) compounds, Pt(IV) compounds and any their combinations. Invention is also aimed at dicarbonyl-lipid compounds, in which platinum compound is dissociatedly bound with dicarbonyl compound. Invention is also aimed at method of treating cancer and metastases. Methods include selection of subject, requiring treatment of cancer or metastases, and introduction to subject of effective amount of nanoparticles, compounds or compositions of the invention.EFFECT: obtaining biocompatible conjugated polymer nanoparticles for chemotherapeutic platinum-based preparation.40 cl, 1 tbl, 29 dwg, 12 ex

Adhesive additive for bitumen compositions // 2500699
FIELD: chemistry.SUBSTANCE: maleinised tall oil-based adhesive additive contains 10-30 wt % bound maleic anhydride. The tall oil used for maleinisation contains resin and fatty acids in weight ratio of 1.0:0.6-5.0, respectively. The adhesive additive is characterised by dynamic viscosity of 0.3-1.0 Pas. The additive can be easily batched and has good distribution in the polymer-bitumen composition. Use of the additive does not require premixing thereof with a thermoplastic elastomer, enabling preparation of the polymer-bitumen composition in a single step.EFFECT: polymer-bitumen composition containing an adhesive additive, characterised by high adhesion to both alkaline and acidic mineral filler.2 tbl, 12 ex