45results about How to "Retain chemical activity" patented technology

The invention provides an enzymolysis lignin epoxy resin and a preparation method thereof. The raw materials include: an enzymolysis lignin-dianhydride prepolymer, a glycidol ether, a catalyst, a curing agent and a filler. The preparation method comprises the following steps that: under the action of the catalyst, an etherification of a hydroxyl group contained in the enzymolysis lignin or a derivative of the enzymolysis lignin and dianhydride is carried to synthesize a prepolymer of enzymolysis lignin-dianhydride; then the prepolymer reacts with the glycidol ether and undergoes etherification and ring closing reaction to obtain an enzymolysis lignin--polyester type epoxy resin. The enzymolysis lignin adopted by the method is natural macromolecular material extracted from the residues which is produced in the preparation of alcohol through the fermentation of wood chips, bamboo and stalk, thereby not only effectively utilizing biological resources, but also replacing petrochemical raw materials. The enzymolysis lignin epoxy resin which can be used as a modifier for engineering materials, adhesives, paints and macromolecular materials has a broad application prospect.

This invention provides a method for preparing cellulolytic enzyme lignin polyurethane and its raw materials. The raw materials comprise: cellulolytic enzyme lignin or its derivative, polyisocyanate, polyol oligomer, chain extension and crosslinking agent, organic solvent and additive. The method comprises: (1) dissolving cellulolytic enzyme lignin or its derivative in the organic solvent, mixing with polyol or a mixture of polyol and organic solvent, and heating or stirring to mix uniformly; (2) adding polyisocyanate, heating, adding conventional additives or fillers, heating to react completely, and vacuum-distilling to obtain brown solid; (3) washing the solid with water, and drying to obtain cellulolytic enzyme lignin polyurethane. The cellulolytic enzyme lignin is a natural polymeric material extracted from wood, bamboo and straw, thus can effectively utilize biomass resources and replace petrochemical raw materials. The method largely improves the process for preparing cellulolytic enzyme lignin polyurethane, which has a better modification effect than traditional sulfonated lignin, and lower cost than high-boiling-point alcohol lignin.

The present invention provides an enzymolysis lignin or enzymolysis derivant modified asphalt composite material and a preparation method. The raw materials include the enzymolysis lignin or the enzymolysis lignin derivant, the asphalt and other modification assistant agents. The preparation steps: the enzymolysis lignin or the enzymolysis lignin derivant, other modification assistant agents and filling agent are mixed in advance to the melted asphalt substrate to be uniformly mixed, and then the mixture is displaced for solidification. The present invention makes full use of the renewable living resource, and not only resolves the problem of the present polymer modified asphalt that depends on the synthesis of the petrochemical raw materials, but also can reduced the use cost of the polymer modified asphalt; appropriate enzymolysis additive can be selected according to different requirements of the modified asphalt product to substitute partial petrochemical raw materials, thus improving the anti-aging performance of the polymer asphalt product; moreover, the craftwork is simple and is easy to implement, thereby can reduce the production cost and improve the competition strength of the product.

The invention relates to a preparation method for a solvent-based lignin-cyanamide derivative flame retardant. The method is characterized in that: after being subjected to a hydroxymethylation reaction, solvent-based lignin is subjected to a condensation polymerization with cyanamide and urea to prepare the solvent-based lignin-cyanamide derivative flame retardant. The solvent-based lignin-cyanamide derivative flame retardant has characteristics of high performance, halogen free, low cost, simple preparation method, and good flame-retardant effect, and can be widely applicable for the modified fields of polymers such as rubber, plastic and the like, and has good economic benefit and social benefit.

The invention provides a method for preparing a water-coal-slurry additive taking enzymatic hydrolysis lignin as a raw material. In the method, the chemical activity of the enzymatic hydrolysis lignin is utilized to directly perform polycondensation with sodium hydrogen sulfite, sodium metabisulfite, acetone and methanal to a prepare enzymatic hydrolysis lignin-sulphonated acetone-methanal condensation polymer (LSAF); the enzymatic hydrolysis lignin-sulphonated acetone-methanal condensation polymer (LSAF) is compatible with other types of surfactants, and is compounded with the surfactants, such as sodium dodecyl benzene sulfonate, PVA, carboxymethyl cellulose sodium and the like to prepare the water coat slurry which has higher stability and lower viscosity; and the liquidity of the water coat slurry is improved. The enzymatic hydrolysis lignin replaces the partial petrochemical raw materials to prepare modified high molecular materials, which not only lowers the cost of high molecular materials, but also can save the consumption of the petrochemical materials, and can generate significant social benefit; and the processing technique for preparing the water-coal-slurry additive taking the enzymatic hydrolysis lignin as a raw material is simple, is easy to implement and has good effect.

The present invention is preparation process of epoxy resin with high-boiling alcohol lignin and its derivative. High-boiling alcohol lignin or its derivative is dissolved in chloropropylene oxide solution or the mixed solution of chloropropylene oxide and organic solvent through stirring and heating, and the mixture is reacted completely via adding catalyst and heating to prepare epoxy resin. The preparation process is simpler compared with traditional lignin epoxy resin, and the present invention has low cost, simple preparation process and high product performance.

Rosin modified resin of high-boiling point alcohol lignin and its derivative and its production are disclosed. The procedure is carried out by mixing high-boiling point alcohol lignin or its derivative with rosin, adding into polylol, phenols and aldehyde, heating, smelting, agitating while mixing homogeneously, adding into catalyst, heating, reacting to generate high-boiling point alcohol lignin modified rosin resin, vacuum supplying and dewatering. It has less consumption and improves softening point and viscosity. It can be used for modified additive or paint of rubber, polyurethane or unsaturated polyester.

The invention discloses an emulsified bitumen and a preparation method thereof. Solvent-type lignin, aldehyde, cyanamide and amine carry out condensation reaction to prepare cyanamide and amine derivative of solvent-type lignin; and the cyanamide and amine derivative of solvent-type lignin are used as emulsifier and treated with emulsification to prepare emulsified bitumen. The method has low cost; and the prepared emulsified bitumen has excellent performance and can be used in road paving or as building material, so as to fully utilize reproducible resource, reduce consumption of petroleum chemicals and gain substantial economic and social benefits.

The invention provides a lignin modified high molecular compatible additive and a preparation method thereof, belonging to the technical field of high molecular compatilizer. The lignin modified highmolecular compatible additive is chloridized lignin or derivatives thereof obtained by modifying lignin by chlorine or the derivatives thereof. Compared with the lignin extracted by other methods, thesolvent-type lignin contains abundant phenolic hydroxyls in structure and maintains various active groups better as well as has higher chemical activity. Active hydrogen in the benzene ring of the solvent-type lignin provides a basis for reacting with chlorine. Using the chloridized lignin derivatives as high molecular compatilizers ensures the full use of the regenerative biological resource oflignin, thereby overcoming a deficiency that an original lignin molecular structure has no enough polar groups, is difficult to be compatible with polar polymers so as to influence the performance oflignin-polar high polymer composite material, and further reducing the cost of high polymer composite material; the lignin modified high molecular compatible additive has simple processing technique,and is easy to implement with favorable modifying effect.