133results about How to "Fast hydrolysis" patented technology

The invention provides a method for intensive processing of straw-type materials or wastes of agriculture and forestry. The method has the following steps: the straw-type materials or the wastes of agriculture and forestry are first ground and then soaked in hot water; hydrolyzation is carried out by diluted acid or monopotassium phosphate solution, the hydrolyzate is used for producing furfural or xylose, solid content after the hydrolyzation is washed and added with alkali substances for neutralization, then cellulase and feruloyl esterase are added to synergetically hydrolyze cellulose in solid content, the cellulose is broken down into 6-carbon monosaccharide and exists in sugar liquor; adsorption filtration is carried out on the sugar liquor by activated carbon, then high-temperature sterilization and cooling are carried out on the sugar liquor before inoculation of fermentation strain to produce acetone, butanol and ethanol by fermentation; the method of the invention maximizes the application of the straw-type materials or the wastes of agriculture and forestry, thus turning existing wastes into the valuables while finding new raw material sources and a new method for producing acetone, butanol and ethanol and bringing more economic and social benefits to the enterprises and the society.

The invention discloses a method of preparing acellular matrixes by using phospholipase. The method of the invention is characterized in that stand-by organ tissue is first pre-treated and then added into solution containing the phospholipase to prepare the acellular matrixes under a controlled condition; the prepared acellular matrixes are then washed. By adopting the preparation method of the invention, the obtained acellular matrix can have good physical property and biological function. Therefore, the preparation method in the invention is not only a great breakthrough in the tissue engineering, but also opens a new way for clinical treatment of diseases. The preparation method of the invention has the advantages of reliable theory, simple and flexible process technique, good product reproducibility and is very easy to be industrialized.

The invention relates to a method for comprehensively extracting oat polypeptide and oat glucan, which comprises the following steps: dissolving oat flour into deionixed water with certain temperature, centrifugally filtering and filtering by a diatomite plate frame for multiple times and separating the mixed solution to obtain an oat protein solid and filtrate; treating the filtrate obtained by separating with low-temperature alpha-amylase under a certain condition and filtering the mixed solution by the diatomite plate frame to obtain supernatant liquid; filtering the supernatant liquid by using an ultrafiltration membrane the cut-off molecular weight of which is 50,000Da-100,000Da and obtaining cut-off solution which is oat glucan solution; and repeatedly dissolving the separated oat protein solid with deionized water the pH value of which is 9-11, adding alkali protease for hydrolyzing, adjusting the pH value, standing and settling and filtering by using the diatomite plate frame to obtain oat polypeptide solution. By using the invention, raw materials are fed for one step, oat polypeptide and oat glucan can be simultaneously obtained and organic solvent is not used. In addition, the invention has the advantages of low operation temperature, energy saving, environmental protection and high safety.

The invention relates to a method for hydrolyzing chitosan and chitin to prepare monosaccharide and oligosaccharide by using ionic liquid as a reaction medium and using protonic acid as a catalyst under the condition of heating. Particularly, the method comprises the following steps: dissolving the chitosan or the chitin into the ionic liquid, adding acid and water into the solution, and heating the solution to perform reaction so as to obtain a hydrolysis product of which the yield reaches up to 70 percent based on total reducing sugar. The method has the advantages of mild operation condition, high reaction speed, reusability of the ionic liquid, low cost, simple process, environmental friendliness and the like, provides a new method for efficiently degrading the chitosan and the chitin, and develops a new path for preparing general oceanic chemicals and medicinal health-care products in large scale.

The present invention discloses preparation process of high concentration polymerized aluminum sulfate flocculant. The preparation process includes two steps of preparing high concentration stable sodium metaaluminate solution and polymerization reaction. During the preparation of high concentration stable sodium metaaluminate solution, sodium gluconate is added into sodium hydroxide solution at 100-120 deg.c, aluminum hydroxide, stabilizer and initiator ammonium persulfate are also added. The polymerization reaction includes dissolving sodium carbonate in small amount of water, adding sodium silicate solution and sodium metaaluminate solution to obtain alkali intermediate product, high speed dispersing aluminum sulfate solution in a water bath and adding the alkali intermediate product slowly, mixing, stirring at 55-60 deg.c to mature and obtain high concentration polymerized aluminum sulfate flocculant. The flocculant has high stability, alumina content of 8.21-10.84 % and basicity of 65.90-72.93 %.

The invention relates to a method for preparing an important chemical raw material TDA (Toluene Diamine) by carrying out chemical treatment at ordinary pressure on residues and wastes formed in the preparation process of TDI (Toluene Diisocyanate). The method comprises the steps of heating a mixture of crushed TDI residues and ethylene glycol at ordinary pressure till boiling reflux; then adding triethylenetetramine and a NaOH water solution, continuously reacting at 100 DEG C, and finally adding water to a system for cooling to obtain a primary hydrolysis product; carrying out salting-out on the hydrolysis product through a saturated sodium chloride solution, carrying out fractional extraction on the hydrolysis product through dichloromethane, and then carrying out reduced pressure distillation on an extract to prepare the TDA. According to the invention, the yield of the TDA accounts for 60% of the weight of added TDI solid residues, and the purity of the TDA is 95%. The method disclosed by the invention carries out hydrolysis on the TDI residues at ordinary pressure without needing a high-pressure reaction kettle, thereby greatly reducing the cost of production equipment; the method disclosed by the invention is outstanding in economic benefit.

The invention discloses a full-polyester fabric printing and dyeing process and a method. The method comprises the following steps of preparation before printing and dyeing of full-polyester fabric, and preparation of clean water in the whole printing and dyeing process; putting the full-polyester fabric onto a goods checking station, and mainly checking the abnormalities of yarn drawing-out, pirnbarre, yellow spot, mildew spot and the like in a fabric blank; checking whether the fabric variety is matched with the required fabric variety or not; under the normal condition, checking each batch. The method has the advantages that by feeding potassium hydroxide into the softened clean water, the alkaline reduction treatment is performed on the full-polyester fabric; the concentration of thepotassium hydroxide in the clean water is effectively increased via the clean water with the temperature of 90 to 100 DEG C; by adding the full-polyester fabric, the alkaline reduction treatment can be effectively performed, so as to solve the problem of influence to the dyeing treatment of the full-polyester fabric due to higher concentration of alkaline in the existing full-polyester fabric; byusing the clean water to flush, the alkaline dirt at the outer surface of the fully-polyester fabric is cleared, thereby avoiding the influence to the treatment of bleaching due to bringing of the alkaline dirt into a reaction kettle.

The invention relates to a modified acrylic resin varnish for anti-corrosion paint, belonging to the field of applied chemistry. The invention overcomes the shortages that the traditional varnish commonly has short preserving time, cannot effectively control the seepage speed of copper ions, cannot control the self-polishing speed and cannot prevent pollution for a long time. In the invention, the preparation process of the modified acrylic resin varnish is divided into two steps of: firstly, adding bimetal salt used as a catalyst to a certain amount of xylene and n-butyl alcohol solvent, and then adding ethylene oxide at certain temperature to finish polymerization reaction; secondly, adding a certain amount of xylene and n-butyl alcohol solvent to the reaction liquid again, and then dropwise adding methyl methacrylate, butyl acrylate, acrylic acid and initiator azodiisobutyronitrile at certain temperature, adding cupric oxide and oleic acid after finishing the polymerization reaction, and then refluxing and shunting so as to obtain the modified acrylic resin varnish. The invention is applied to pollution prevention of an underwater structure and has the characteristics of long varnish endurance, no cracks and self-polishing performance.

The present invention discloses technological process and apparatus for hydrolyzing methyl acetate as the side product of refined terephthalic acid production. The technological process includes the following steps: the mixing between methyl acetate through active catalyst protecting column and methyl acetate through eliminating organic impurity and the catalytic hydrolysis reaction in the reaction area filled into cationic exchange resin inside the catalytic rectification tower; refluxing the un-hydrolyzed reactant in controlled ratio to the reaction area; and pumping out the liquid hydrolysate. The corresponding hydrolysis apparatus is one cylindrical tower in the diameter greater than 0.5 m and height greater than 20-24 m, and its catalytic rectification section has one catalyst bed layer in 6 m over thickness and comprising intersected catalyst structure units. The present invention can realize industrial scale hydrolysis of methyl acetate in required hydrolysis rate within 50-80 wt%.