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

A process for the preparation of mixed ethoxylated alkyl phenol / alkyl phenol ethoxy sulfate surfactants, such surfactants, and detergent formulations incorporating the same. The mixed surfactants are more tolerant of sodium carbonate, allowing greater amounts of sodium carbonate to be used so that the amount of surfactant can be reduced resulting in overall cost savings in the resultant laundry product.

The invention discloses a method for preparing dissolving pulp from whole cotton stalks. The method comprises the steps of extracting hemicellulose and removing fat and waxy substances through pretreatment with organic alcohol and alkali; removing lignin and pulping through an organic alcohol assisted sulphate cooking method; and carrying out organic acid post-treatment to remove residual ash inorganic salt and the like. The method comprises the following steps: A, pretreating cotton stalks prepared before; B, stewing pretreated cotton stalk pulp by an ethanol-assisted sulfate method; C, carrying out organic acid post-treatment to remove residual ash; D, carrying out chelation treatment and bleaching. The method has the beneficial effects that with the organic alcohol assisted alkali pretreatment, organic alcohol improved sulfate stewing method and organic acid post-treatment process, the reaction conditions are mild, the temperature is low, the time is short and the production efficiency is high; the cotton stalk dissolving pulp has good performance, and the quality requirements of the dissolving pulp for viscose fiber are met; the content of alpha-cellulose is higher than 90%, the content of pentosan is less than 1.39%, and the ash content is less than 0.06%.

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 relates to a preparation method of hydrothermal melon seed shell activated carbon and belongs to the technical field of biochar adsorption materials. Melon seed shells are taken, subjected to ball milling and sieved, and ball-milled melon seed shell powder is obtained; the ball-milled melon seed shell powder is dried, and dried ball-milled powder is obtained; the dried ball-milled powder and hydrogen peroxide are put in a beaker and subjected to ultrasonic filtration, and modified ball-milled powder is obtained; the modified ball-milled powder is poured into a high-pressure reaction kettle, a potassium permanganate solution is added, the mixture is stirred, left to stand and cooled to the room temperature, and a modified mixed solution is obtained; the modified mixed solution is filtered, filter residues are poured into an acetone solution, taken out after being soaked and then washed with deionized water, and modified filter residues are obtained; macroporous adsorbent resin is taken and subjected to ball milling, macroporous adsorbent resin powder is obtained, the macroporous adsorbent resin powder and the modified filter residues are stirred in a stirrer, added to a blocky mold in a filling manner, put in a cooling chamber and then put in a freezing dryer to be freeze-dried, and a cured material is obtained; the cured material is put in a sintering furnace to be sintered, and the hydrothermal melon seed shell activated carbon is obtained.

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.