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

The invention relates to a composition comprising a plant-derived cellulose particulate material comprising less than 30 wt% extractable glucose; and extractable xylose in an amount of at least 3 % of the amount of extractable xylose in the starting plant material, and an agent selected from the group comprising natural ionic polymersor natural non-ionic polymers; synthetic water dispersible polymers, and / or associative thickeners, and its various uses, including as a drilling fluid.

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.

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 DEC 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.

A method for catalytic oxidation of cellulose using a heterocyclic nitroxyl radical as catalyst, main oxidant acting as oxygen source, and an activator of the heterocyclic nitroxyl radical, comprises—a preliminary activation step of the heterocyclic nitroxyl radical with hypochlorite to activated catalyst, and after the preliminary activation step, a cellulose oxidation step using the activated catalyst and hypochlorite as the main oxidant to oxidize cellulose. In the cellulose oxidation step, fibrous starting material is subjected to the oxidation to oxidize the cellulose, whereafter the oxidized fibrous raw material is disintegrated to nanofibrillar cellulose (NFC).

The invention relates to a biocatalytic pulping process, which uses a composite biocatalyst composed of white rot fungus, cellulase, pectinase, yeast and water to process pulping raw materials wetted by ozone water. Biocatalyzed to produce slurry. The biocatalytic pulping process of the present invention only needs about 2 hours to catalyze the pulping raw material into papermaking slurry, no organic compound is generated during the degradation process, no washing of the slurry is required, no sewage is generated, and pollution is completely eliminated. Moreover, the process is simple, the production cycle is short, the energy consumption is small, and the invention is convenient for popularization.