53results about How to "Increase ash content" patented technology

The invention discloses a method for modifying paper filler-calcium carbonate, comprising the following steps of: firstly, preparing precipitated calcium carbonate (PCC) dispersion; secondly, controlling reaction conditions of PCC and cationic styrene-acrylic emulsion; and thirdly, obtaining modified PCC after cooling and precipitation. During the modifying process, the mass ratio of the PCC to the cationic styrene-acrylic emulsion is 75:1, the reaction temperature is 70 DEG C, and the embedding degree of cationic styrene-acrylic modified PCC approximates to 99 percent. The modified PCC as paper filler has a filling quantity ranging from 10 to 45 percent which is based on oven dry stock, and is filled at papermaking wet parts combined with two-element retention aid cationic polyacrylamide and cationic starch, thereby not only increasing the ash content of paper, but also improving the optical performance and the physical performance of the paper. The method for modifying paper filler-calcium carbonate is simple, has easy operation and lower treatment cost, and effectively reduces the original fiber consumption and the production cost.

The invention discloses a method for improving the ash content of paper-making process reconstituted tobaccos. The method includes the steps that after tobacco raw materials are extracted, solid-liquid separation is carried out, tobacco liquid is partially refined, concentrated and charged and then is manufactured into coating liquid, pulping treatment is partially conducted on the tobacco solid part, so that tobacco slurry fibers are obtained, CaCO3 is added into the tobacco slurry fibers, and the CaCO3 is filled into cell cavities of the tobacco slurry fibers through pits of the tobacco slurry fibers; afterwards, the tobacco slurry fibers and additional fiber slurry are mixed according to the weight ratio of 4 to 1, and then paper manufacturing with pulp is carried out to manufacture reconstituted tobacco sheets; the coating liquid is made to coat the reconstituted tobacco sheets, so that the paper-making process reconstituted tobaccos are manufactured. According to the method, the technology that the CaCO3 is filled into the cell cavities of the tobacco slurry fibers is applied to the preparation technology of the paper-making process reconstituted tobaccos, any chemical agent such as a high-molecular polymer is not added, and the purposes that the ash content is improved and meanwhile the strength performance of the paper-making process reconstituted tobacco sheets is improved can be achieved.

The invention belongs to the field of plant extraction and relates to high value-added utilization technology of reeds, in particular to a method for extracting xylose by steam explosion of reeds to prepare furfural co-production fiberboards. The method comprises the following steps: 1) the reed raw material is subjected to fracturing and sectioning; 2) impurity removal; 3) steam explosion treatment, and the treated material is washed with water; 4) the washing liquid enters a fractionation tower, and the formic acid and acetic acid are collected at the top of the tower. and furfural aqueous solution, and then use electrodialysis to separate formic acid, acetic acid and furfural aqueous solution; the reducing sugar mixture is obtained at the bottom of the tower; 5) microfiltration removes glucose after adding yeast and fermentation, and obtains a mixed solution containing xylose and arabinose; 6) reverse osmosis membrane Concentration; 7) system furfural. The remaining material was used to prepare fiberboard. The method degrades the pentosan in the raw material reed into xylose by steam explosion without adding acid, and recovers it by water extraction, which avoids acid pollution and has obvious economic benefits; the obtained xylose aqueous solution is obtained by solvent method The production of furfural has high yield, steam saving and less pollution.

The invention discloses a propylene polymer and a preparation method thereof. The method comprises polymerizing propylene or a mixture of propylene and ethylene and / or alpha-olefins selected from C4-C8 in the presence of a catalyst comprising a solid component, an alkylaluminum compound and any Optionally an external electron donor compound, the solid component contains the reaction product of the following components: (i) a magnesium-containing compound; (ii) a titanium-containing compound; and (iii) an internal electron donor; wherein the internal electron donor It is a combination of internal electron donor compound a, internal electron donor compound b and internal electron donor compound c, the internal electron donor compound a is a glycol ester compound shown in formula I, and the internal electron donor compound b is The diether compound represented by formula II, the internal electron donor compound c is an alkylene oxide compound represented by formula III. The propylene polymer obtained by the method provided by the present invention has a high isotactic index and a low ash content.