8 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.

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.

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.

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.