3 results about "Hemicellulose" patented technology

The invention discloses a new method for extracting plant essential oil by an aqueous enzymatic method. The new method comprises the following steps: (a) selecting berries, roots, stems or leaves of allspice, weighing and then cleaning; (b) crushing allspice plant tissues to be 50-70 meshes, and sieving; (c) adding a certain amount of mixed enzyme into the crushed plant tissues to carry out hydrolysis for 18-30 hours at the temperature of 2-8 DEG C, wherein the mixed enzyme is a mixture of cellulase, hemicellulase, pectinase and protease; (d) after enzymolysis is finished, carrying out separation on solid and liquid, wherein the liquid phase is a mixture of oil and water; further concentrating the liquid phase for 8-15 hours and separating to obtain allspice oil. The new method disclosed by the invention has the beneficial effects that the prepared allspice oil is high in purity, the utilization rate of raw materials is high, the production cost is reduced, and the industrial needs arefully met, so that the application prospect is wide.

The invention discloses a straw pretreatment method for extracting hemicellulose. The straw pretreatment method comprises the steps of soaking and wetting straws by virtue of pretreatment liquid, sending the obtained mixture into a pulping machine, pulping until the particle sizes of obtained materials are smaller than or equal to 1.0mm, carrying out solid-liquid separation on the obtained materials, collecting solids, washing the solids with water, and extracting the hemicelluloses by virtue of the solids, wherein the pretreatment liquid is an alkali solution with the concentration of 1g/L-20g/L. According to the straw pretreatment method, straw fiber is wetted and softened by virtue of alkali liquid with a relatively low concentration, and the pulping machine is utilized for pulping the wetted straws, so that the contact area between the fiber in the straws and the pretreatment liquid is greatly improved, impurities such as acetyl, pigments and the like in the straw fiber are beneficially removed, the content of impurities in the subsequent hemicellulose extraction liquid is decreased without losing hemicelluloses in the straws, the extraction rate of the hemicellulose is increased, and furthermore, the consumption of treatment power of the materials is low.

The invention discloses a biomass continuous depolymerization device and method capable of taking materials on line. The device comprises a first reactor and a second reactor, a feeding port is formedin the first reactor, the first reactor is used for depolymerizing hemicellulose in biomasses, a residue outlet and a hydrolysate outlet are formed in the second reactor, the initiating end of the second reactor is serially connected with the tail end of the first reactor, and the second reactor is used for depolymerizing remained cellulose after the hemicellulose is depolymerized. According to the device, by the aid of a reciprocating type continuous feeder and two serially connected rectors, continuous feeding and depolymerization of the biomasses can be achieved, the utilization efficiencyof the biomasses is improved, and hydrolysis products are easily separated.