43results about "Pretreatment with oxygen-generating compounds" patented technology

The present invention relates to a process for preparing a high-yield pulp comprising a) treating a lignocellulose containing material chemically by means of an oxidising system comprising at least one non-enzymatic oxidant substantially free from ozone and chlorine dioxide and an activator at a pH from about 2 to about 6.5; and b) treating the lignocellulose containing material mechanically for a time sufficient to produce a high-yield pulp, wherein the lignocellulose containing material is chemically treated prior to and / or during any mechanical treatment stage, and wherein the lignocellulose containing material is not chemically treated at a pH from about 11.5 to about 14 between stages a) and b).

The present invention relates to a process for preparing a high-yield pulp comprisinga) treating a lignocellulose containing material chemically by means of an oxidizing system comprising at least one non-enzymatic oxidant substantially free from ozone and chlorine dioxide and an activator at a pH from about 2 to about 6.5; andb) treating the lignocellulose containing material mechanically for a time sufficient to produce a high-yield pulp, wherein the lignocellulose containing material is chemically treated prior to and / or during any mechanical treatment stage, and wherein the lignocellulose containing material is not chemically treated at a pH from about 11.5 to about 14 between stages a) and b).

The present invention relates to a process for the production of microfibrillated cellulose wherein the process comprises the steps of, providing a slurry comprising fibers, adding the slurry to an extruder, treating the slurry in the extruder so that the fibers are defibrillated and microfibrillated cellulose is formed. The invention further relates to a microfibrillated cellulose produced.

The present invention relates to one kind of paper pulp making biologically catalyzed degradation process. Paper pulp material after being wetted with ozone water is biologically catalyzed degraded under the action of the composite biologically catalyzed degrading agent comprising whiterot fungus, cellulose, pectase, yeast and water, so as to produce slurry. The process has a production period as short as 2 hr, produces no organic compound and sewage, and is environment friendly, simple and low in power consumption.

The invention relates to a co-production preparation method of bamboo biomass fuel and bamboo pulp, and the method comprises the following steps: (1) performing hot-water extraction for getting a hemicellulose extract liquid; (2) extruding and rubbing cellulose, and extruding for removing a hemicellulose and lignin extract liquid and further getting a filamentous material; (3) performing depth extraction on the cellulose and preparing the bamboo pulp: adding alkali into the filamentous material, performing heating-up treatment, washing, and filtering out a hemicellulose and lignin degradation solution, thus getting the bamboo pulp; (4) preparing biomass fuel ethanol: separating hemicellulose, performing saccharification conversion, further inoculating microzyme for fermentation, and performing distillation and concentration to get the biomass fuel ethanol; and (5) preparing biomass fuel particles: smashing slender bamboo tails, branches and leaves, then mixing with sludge and residual liquid after separating the hemicellulose in the step (4), and performing extrusion forming and drying for getting the biomass fuel particles. The process is advanced; and furthermore, on the premise of not increasing the production cost, the utilization rate of bamboo resources is improved, the economic benefits are increased and the environmental pollution is reduced.

The invention relates to a low energy consumption clean paper pulp extracting method and a papermaking process thereof, solving the problems that fibrous raw materials need to be boiled at high temperature and pressure in the pulp preparing and papermaking processes and chemical solutions produce a large quantity of black or red liquid in the pulp preparing and papermaking processes to cause great waste to resources and great pollution to the environment in the prior art. The invention adopts the following technical scheme: the low energy consumption clean paper pulp extracting method is realized by removing impurities from biomass raw materials rich of fiber, crushing, softening and soaking, separating organic matters, grinding and pulping, wherein a softening and soaking solution contains the following components in percent by weight: 10-20 sodium oxide, 3-5 sodium carbonate, 0.5-2.5 penetrating agent T, 0.5 magnesium oxide and 0.05-0.15 chelating agent EDTA. The papermaking process matched with the method comprises the following steps: getting materials ready, rubbing to devillicate, soaking to react, separating liquid medicine, spirally squeezing pulp, refining with high consistency, removing slag, coarsely screening and making paper. The pulp preparing process has simple course, no high requirements on environment and equipment condition, easily popularized technology, no requirement on the scale of production, low costs for building production lines and purchasing equipment and less running expense.

A pretreated biomass is subjected to high frequency pulses and shear forces without denaturing and / or degrading the individual components of the biomass. The biomass is then subjected to compressive force to separate a first liquid fraction from a first fractionated biomass. The first fractionated biomass may again then be subjected to the same high frequency pulses and shear forces as previously, particularly if there are hemicellulose and / or sugars still present in the first fractionated biomass. Compressive forces are used to separate a second liquid fraction from a second fractionated biomass. The second fractionated biomass is subjected to oxidation. The second fractioned biomass is then subjected to compressive forces to separate out one or more water insoluble components of the biomass in water soluble form and to provide cellulose that has not been denatured and / or degraded and has a lignin contact of less than 7 percent.

Sugarcane bagasse consists of mainly three polymeric components, namely cellulose (40-45%), hemicellulose (xylan) (28-30%), and lignin (19-21%). A process is herein disclosed for fractionating sugarcane bagasse into cellulose, hemicellulose and lignin with high purity a-cellulose, which is a useful raw material for preparing cellulose esters like cellulose triacetate and other high value-added cellulose plastics. Co-production and recovery of hemicellulose (xylan) and lignin in high yields and high purities, along with a-cellulose, is another important feature of this process. Sugarcane bagasse consists of a material known as pith which constitutes 30-35% by weight of bagasse. Pith contains cellulose, hemicellulose, and lignin, in addition to various other ingredients and cell mass. The process described herein discloses the use of partially depithed bagasse as a preferred raw material for fractionation. Use of sugarcane bagasse containing pith leads to a product which is lower in yield as well as poorer in color.

Sugarcane bagasse consists of mainly three polymeric components, namely cellulose (40-45%), hemicellulose (xylan) (28-30%), and lignin (19-21%). A process is herein disclosed for fractionating sugarcane bagasse into cellulose, hemicellulose and lignin with high purity α-cellulose, which is a useful raw material for preparing cellulose esters like cellulose triacetate and other high value-added cellulose plastics. Co-production and recovery of hemicellulose (xylan) and lignin in high yields and high purities, along with α-cellulose, is another important feature of this process. Sugarcane bagasse consists of a material known as pith which constitutes 30-35% by weight of bagasse. Pith contains cellulose, hemicellulose, and lignin, in addition to various other ingredients and cell mass. The process described herein discloses the use of partially depithed bagasse as a preferred raw material for fractionation. Use of sugarcane bagasse containing pith leads to a product which is lower in yield as well as poorer in color.

This invention discloses a pulping process with mulberry bough as raw material, which comprises the following steps: slicing, steaming before scouring, scouring, steaming after scouring, first squeeze, second squeeze, steeping, reaction, post-treatment, and these steps are sequential. The invention improves percent of pass of slicing mulberry bough and availability ratio of pulp in the core, and has good dust collection efficiency. With mixing pulping of mulberry bough, the bore rod with short fibre and large content can be used fully, and the finished pulp can be used in top grade paper. With fully using resource is, the process settles said technical matters, and it is suit for use in commercial manufacture.

Methods for facilitating sugar release from lignocellulosic biomass and for utilizing the sugars for microbial lipid (e.g. biofuel) production are provided. The methods involve pretreating lignocellulosic biomass using various oxidizing agents (ozone, peroxone, etc.) at a temperature not higher than 50° C. and pressure no higher than 1.5 atm to render the biomass more accessible to enzymatic hydrolytic degradation into sugars and utilizing soluble sugars for fermenting oleaginous microorganism to produce microbial lipids.

The present disclosure comprises methods, apparatus, components, and techniques for pretreatment of biomaterials using targeted wet oxidation. The targeted wet oxidation pretreatment is an upstream method for converting solid biomass into fuels and / or specialty chemicals. Embodiments of the present disclosure comprise methods carried out on biomaterials to selectively oxidize lignin components of the biomass, thereby resulting in bio accessible / digestible biomass fibers. In embodiments of the present disclosure, such methods may comprise pretreatment processes to prepare the biomaterials for a subsequent fermentation or other like conversion may be carried out to result in useful bio fuels or other bioproducts.

The present disclosure comprises methods, apparatus, components, and techniques for pretreatment of biomaterials using targeted wet oxidation. The targeted wet oxidation pretreatment is an upstream method for converting solid biomass into fuels and / or specialty chemicals. Embodiments of the present disclosure comprise methods carried out on biomaterials to selectively oxidize lignin components of the biomass, thereby resulting in bio accessible / digestible biomass fibers. In embodiments of the present disclosure, such methods may comprise pretreatment processes to prepare the biomaterials for a subsequent fermentation or other like conversion may be carried out to result in useful bio fuels or other bioproducts.

The invention discloses a method for producing poach paper slurry in an oxygen free radical remove / poach reaction kettle via bamboo grass, comprising that rotating an electric accelerator in the kettle to transmit electrons in an organic solution, to supply the electrons to basic oxygen, to generate the ultra-oxygen anion free radical (O2-. / HOO.) in the oxidization reaction kettle to transform and separate lignin, to change the color group of the plant cell layer, to obtain slurry. The invention can be applied on hard plants as bamboo, reed or the like. The invention completely changes the chemical slurry technique with serious pollutions as acid, alkali or the like, which avoids recycling alkali to save cost, and avoids boiling process and poaching tower with serious pollution, to utilize abundant resource, save water and reduce cost.

A method for treating cellulosic biomass feed stock including: feeding the feed stock to an upper inlet of a vertical reactor vessel, wherein the feed stock is deposited on a pile of feed stock within the vertical reactor vessel; adding heat energy to heat the feed stock by injecting steam to an upper region of the vertical reactor vessel; propelling the feed stock through an outlet in a lower region of the vertical reactor vessel by injecting steam into the biomass at, near or after the bottom outlet of the vertical reactor vessel, and moving the propelled feed stock through an expansion device, such as a steam explosion device, to subject the feed stock to a steam explosion process.

A short oxygen delignification method employs a mixing assembly including a mixing chamber having an interior wall which is generally symmetrical about a central longitudinal axis. At least one inlet is used to introduce paper pulp, a basic compound, optional steam and an oxygen-containing gas into the mixing chamber. At least one axial baffle is connected to and extends along the interior wall. At least one transverse baffle is connected to and extends from the interior wall transverse to the axis. A rotatable agitator includes at least one agitator baffle extending transverse to the axis at a location in alignment with a respective transverse baffle. This forms at least one gap between the at least one agitator baffle and the at least one respective transverse baffle. The paper pulp fluid is forced to travel through the at least one gap. A short delignification reaction occurs inside the mixing chamber. Delignified paper pulp fluid leaves the mixing chamber through at least one outlet of the mixing chamber.

A method of de-inking cellulosic fibrous materials comprising:a. admixing an alkaline reagent selected from the group consisting of ammonium hydroxide and hydrogen peroxide and mixtures thereof with an aqueous suspension of inked cellulosic fibrous material such that they react at the ink particle / cellulosic fiber interfaces to dislodge ink particles from the cellulosic materials; andb. removing the dislodged ink particles from the aqueous suspension.

The invention discloses a method for generating poach paper slurry in an oxygen free radical remove / poach reaction kettle via dry banana stems, comprising that rotating an electric accelerator in the kettle to transmit electrons in an organic solution, to supply the electrons to basic oxygen, to generate the ultra-oxygen anion free radical (O2-. / HOO.) in the oxidization reaction kettle to transform and separate lignin, to change the color group of the plant cell layer, to obtain slurry. The invention can be applied on tropical plant as tropical plant or the like. The invention completely changes the chemical slurry technique with serious pollutions as acid, alkali or the like, which avoids recycling alkali to save cost, and avoids boiling process and poaching tower with serious pollution, to utilize abundant resource, save water and reduce cost.

A method of de-inking cellulosic fibrous materials comprising: 1) admixing an alkaline reagent with hydrogen peroxide and an aqueous suspension of inked cellulosic fibrous material in amounts whereby the alkaline reagent and hydrogen peroxide react at the ink particle / cellulosic fiber interfaces to dislodge the ink particles from the cellulosic materials; and, 2) removing the dislodged ink particles from the aqueous suspension, wherein the alkaline reagent comprises sodium carbonate or a mixture of sodium carbonate and a) ammonium hydroxide, b) sodium bicarbonate or c) mixtures of sodium carbonate and ammonium hydroxide.

Methods for producing lipids from lignocellulosic biomass are provided. Sugars produced by pretreatment of lignocellulosic biomass are utilized by heterotrophic oleaginous fungi or yeast to increase their biomass and to produce lipids without prior detoxification of the pretreated biomass. After the fungi / yeast are cultured with the sugars, solid residues from the pretreated biomass are combined with the fungi / yeast under conditions which allow simultaneous 1) enzymatic degradation of cellulose and / or hemicellulose to produce sugars and 2) fermentation of the sugars for further increases in biomass and lipid production.

The invention relates to a cellulose solution manufacturing method including: performing an ozonation treatment to bring a cellulose-containing material and ozone into contact with each other; and performing an alkali treatment to bring the obtained treated material and an alkali aqueous solution into contact with each other, thereby dissolving at least cellulose in the cellulose-containing material brought into contact with the ozone in the alkali aqueous solution. According to the invention, it is possible to provide a method of manufacturing a cellulose solution in which cellulose can be dissolved in a more simple manner, a method of manufacturing a cellulose precipitate in which cellulose can be recovered from the cellulose solution, and a method of saccharifying cellulose which uses the cellulose precipitate.

Compositions including treated Kraft pulp, useful for making rayon fibers, having a lower degree of polymerization, a high R18, a low hemicellulose content, and high reactivity, are described. Methods of making the compositions are also described.

The invention discloses a method of oxidation rubbing high yield making straw pulp and equipment thereof, comprising the following process steps: firstly, straw is input into a feeding port (2) after being cut off and dust removed; secondly, promoter is prepared; thirdly, after the prepared promoter is diluted by water, material is injected when heated to 60-80 degree centigrade, then 2-4 percent of the total weight of the promoter and the material are stirred uniformly and input into an oxygen impregnating machine (1) for reacting; fourthly, the material after being oxygen impregnated is input into a rubbing machine (8) through a first feed screw (7) for vertically separating into wires; fifthly, the rubbed material is input into an oxygen dissolving machine (11) for oxygen dissolving. Processing equipment used by the method is orderly combined by the oxygen impregnating machine (1), the feed screw (7), the rubbing machine (8), a second feed screw (7), a hoist (10) and the oxygen dissolving machine (11). The invention can reserve most lignin, parenchyma cell and hemicellulose, has high pulp yield, and reduces environmental pollution.

The invention relates to a low energy consumption clean paper pulp extracting method and a papermaking process thereof, solving the problems that fibrous raw materials need to be boiled at high temperature and pressure in the pulp preparing and papermaking processes and chemical solutions produce a large quantity of black or red liquid in the pulp preparing and papermaking processes to cause great waste to resources and great pollution to the environment in the prior art. The invention adopts the following technical scheme: the low energy consumption clean paper pulp extracting method is realized by removing impurities from biomass raw materials rich of fiber, crushing, softening and soaking, separating organic matters, grinding and pulping, wherein a softening and soaking solution contains the following components in percent by weight: 10-20 sodium oxide, 3-5 sodium carbonate, 0.5-2.5 penetrating agent T, 0.5 magnesium oxide and 0.05-0.15 chelating agent EDTA. The papermaking processmatched with the method comprises the following steps: getting materials ready, rubbing to devillicate, soaking to react, separating liquid medicine, spirally squeezing pulp, refining with high consistency, removing slag, coarsely screening and making paper. The pulp preparing process has simple course, no high requirements on environment and equipment condition, easily popularized technology, norequirement on the scale of production, low costs for building production lines and purchasing equipment and less running expense.

Sugarcane bagasse consists of mainly three polymeric components, namely cellulose (40-45%), hemicellulose (xylan) (28-30%), and lignin (19-21%). A process is herein disclosed for fractionating sugarcane bagasse into cellulose, hemicellulose and lignin with high purity α-cellulose, which is a useful raw material for preparing cellulose esters like cellulose triacetate and other high value-added cellulose plastics. Co-production and recovery of hemicellulose (xylan) and lignin in high yields and high purities, along with α-cellulose, is another important feature of this process. Sugarcane bagasse consists of a material known as pith which constitutes 30-35% by weight of bagasse. Pith contains cellulose, hemicellulose, and lignin, in addition to various other ingredients and cell mass. The process described herein discloses the use of partially depithed bagasse as a preferred raw material for fractionation. Use of sugarcane bagasse containing pith leads to a product which is lower in yield as well as poorer in color.