12 results about "Hexamethyldiamine" patented technology

This invention relates to a method for preparing hexamethylenediamine by hydrogenation of adiponitrile in the presence of a Raney nickel catalyst, wherein a Raney nickel catalyst modified by treatment with carbon monoxide or carbon dioxide in a liquid medium is used.

The present disclosure relates generally to polypeptides capable of hydrolyzing amido linkages in polyamides, and more particularly to polypeptides comprising the amino acid sequence of amino acid residues 2-398 of SEQ ID NO: 2 or an amino acid sequence having at least 70% sequence identity thereto; or a polypeptide comprising the amino acid sequence of amino acid residues 2-394 of SEQ ID NO: 88 or an amino acid sequence having at least 75% sequence identity thereto. The disclosure also extends to methods of using the polypeptides. In another embodiment, the disclosed polypeptides are capable of hydrolyzing nylon 6, 6 oligomers to produce adipic acid and hexamethylenediamine.

This invention discloses a method for preparing hexamethylenediamine, comprising the following steps: (1) under ammoniation reaction conditions, optionally in the presence of a solvent, subjecting hexanediol and ammonia to an ammoniation reaction to obtain an ammoniation reaction product; (2) separating and obtaining from the ammoniation reaction product a stream containing hexamethyleneimine and water, dehydrating the stream containing hexamethyleneimine and water to obtain a dehydrated stream containing hexamethyleneimine, and returning at least part of the dehydrated stream containing hexamethyleneimine as a circulating stream to the step (1), wherein a water content in the dehydrated stream containing hexamethyleneimine is less than 3 wt %, preferably less than 1.5 wt %. The invention can not only improve the yield of hexamethylenediamine but can also prolong the service life of the catalyst.

The invention relates to the technical field of plastics, in particular to an ultrathin micro-texture mobile phone rear cover plate and a preparation method thereof. The method comprises the following steps: carrying out end group regulation on polyhexamethylene adipamide resin through hexamethylene diamine, and carrying out melt blending on the polyhexamethylene adipamide resin, tetraethyl orthosilicate and hydroxyl-terminated polydimethylsiloxane through a sol-gel reaction to obtain hybrid inorganic powder; hydroxyl-terminated polydimethylsiloxane and hexamethylene diisocyanate are sequentially added by adopting a step-by-step feeding strategy for modification. And then molding in a mold with micro textures through an injection molding-compression molding process, and carrying out limited annealing treatment. According to the invention, the problems of incomplete micro-texture copying, easy scratching and poor thermal dimensional stability of the ultrathin plate are effectively solved, and high-precision texture transfer, excellent surface scratch resistance and long-term flatness of the plate with the thickness of 320-380 microns are realized.

The invention relates to the field of petrochemicals, in particular to the preparation of organic complexes of hexamethylenediamine amide of oleic acid and their use as bactericidal-inhibitors against sulfate-reducing bacteria. The organic complexes of hexamethylenediamine amide of oleic acid, having the general formula: [C17H33CONH(CH2)6NH3] + [COOR] – where R=H or R=CH3, are claimed as bactericidal-inhibitors.

The present application relates to the technical field of metal corrosion inhibitor, in particular to a MXene composite corrosion inhibitor, a preparation method and application thereof.The preparation method of the MXene composite corrosion inhibitor is as follows: MXene powder and hexamethylene diamine are mixed and then added into anhydrous ethanol for stirring, and ultrasonic treatment to obtain a MXene powder mixture; the MXene powder mixture is mixed with double distilled water, and reacted in a reaction kettle to obtain a MXene mixture solution, which is then mixed with an additive and subjected to ultrasonic treatment to obtain a MXene composite corrosion inhibitor intermediate solution; the MXene composite corrosion inhibitor intermediate solution is mixed with double distilled water, and then hydrochloric acid solution is added to obtain the MXene composite corrosion inhibitor.The preparation method is simple, low in cost, and the obtained MXene composite corrosion inhibitor can not only realize efficient and rapid etching of zinc element in hot galvanizing layer, but also effectively prevent etching of iron element in steel plate.

The invention relates to a polyamide composition. The present invention addresses the problem of providing a polyamide composition in which carbon footprint (CFP) is suppressed, the polyamide composition comprising (A) a polyamide that contains a structural unit derived from (B) hexamethylenediamine, and (B) a polyamide that contains a structural unit derived from (B) hexamethylenediamine. The hexamethylenediamine (B) contains a hexamethylenediamine produced from a saccharide using a microorganism.

A solvent composition for carbon capture according to a preferred embodiment comprises at least two of the following: diethylaminoethanol (DEAE), hexamethylenediamine (HMDA), and polyethylenimine (PEI). Another embodiment includes a method of performing carbon capture using the carbon capture solvent compositions described herein. Another embodiment provides an apparatus for performing carbon capture using the carbon capture compositions described herein and / or the carbon capture methods described herein.

A non-naturally occurring microbial organism having a 6-aminocaproic acid, caprolactam, hexamethylenediamine or levulinic acid pathway is provided.SOLUTION: The microbial organism contains at least one exogenous nucleic acid encoding an enzyme in a 6-aminocaproic acid, caprolactam, hexamethylenediamine or levulinic acid pathway, respectively. The invention further provides methods for producing 6-aminocaproic acid, caprolactam, hexamethylenediamine or levulinic acid. The method includes culturing a 6-aminocaproic acid, caprolactam or hexamethylenediamine producing microbial organism, wherein the microbial organism expresses at least one exogenous nucleic acid encoding a 6-aminocaproic acid, caprolactam, hexamethylenediamine or levulinic acid pathway enzyme in a sufficient amount, under conditions and for a sufficient period of time to produce the respective product.SELECTED DRAWING: None

A solvent composition for carbon capture according to a preferred embodiment comprises at least two of the following: diethylaminoethanol (DEAE), hexamethylenediamine (HMDA), and polyethylenimine (PEI). Another embodiment includes a method of performing carbon capture using the carbon capture solvent compositions described herein. Another embodiment provides an apparatus for performing carbon capture using the carbon capture compositions described herein and / or the carbon capture methods described herein.

The application discloses a kind of thiol chelate denitrification biological fillers and its preparation method and application, belong to sewage treatment field, the application will hexamethylene diamine with sulfur at high temperature reaction, form polysulfide long chain structure, the thiol generated is chelated with ferrous ion, nickel ion and cobalt ion, obtain the polymer loaded with metal ion;The product is granulated, and the final denitrification biological filler is obtained.The advantage of the denitrification biological filler prepared by the application is that it can provide the nutrients necessary for microbial growth, which is also a key component of hemoglobin and anaerobic ammonia oxidation protease, promotes the growth and reproduction of anaerobic ammonia oxidation bacteria, and provides sulfur source for sulfur autotrophic denitrifying bacteria, realizes sulfur autotrophic denitrification and anaerobic ammonia oxidation coupling denitrification, has excellent mechanical strength, stability and high-efficiency denitrification capacity, and is very suitable for long-term application in sulfur autotrophic denitrification and anaerobic ammonia oxidation coupling process.

A method of concurrent oil extraction and carbon dioxide (CO2) mineralization includes treating a subterranean rock with hexamethylenediamine-containing solution to improve CO2 uptake and oil recovery rate.