197results about How to "Shorten the hydrolysis time" patented technology

The invention provides a method for synthesizing a tin-silicon molecular sieve. The method comprises: (1) hydrolyzing an organic silicon source, a tin source and an alkali source template agent to obtain a mixture A and carrying out first crystallization on the obtained mixture A; and (2) mixing the material obtained by first crystallization with an inorganic silicon source to obtain a mixture B and carrying out second crystallization on the obtained mixture B. The invention provides the tin-silicon molecular sieve synthesized through the method and an application of the molecular sieve. The invention provides a phenol hydroxylation method. By taking the inorganic silicon source which is relatively low in price as a part of, or even, a main silicon source, the use level of organosilicone esters is reduced, and the synthetic benefit is improved to a great extent. Moreover, the synthesized tin-silicon molecular sieve is high in relative crystallinity, high in catalytic oxidation activity and high in selectivity, and shows the characteristics of being high in catalytic oxidation activity and high in selectivity on hydroquinone in a probe reaction, i.e. a phenol hydroxylation reaction.

The invention relates to the field of processing of agricultural products, in particular to short fiber food waste residue-based nano cellulose and a preparation method thereof. The preparation method comprises three parts of pretreatment of short fiber food waste residues, acid hydrolysis of food residue fibers and homogenization. The nano cellulose prepared by the method has the granularity of 50-300nm, is short bar-shaped or microsphere-shaped and can be widely used for preparing a food additive or medicament excipient, and the like. In the method, acid hydrolysis is combined with high-pressure homogenization, thus the acid consumption and hydrolysis time are reduced, the granularity uniformity of the nano cellulose is improved; and the invention is suitable for mass production.

The invention discloses a method for efficiently preparing a monocyanamide solution, and is used for solving the problems of high equipment investment, high energy consumption, long production period, high production cost, high requirement on concentration of carbon dioxide, high content of calcium ions and incomplete filtration of cyanamide waste residue of an existing production process of the 50% monocyanamide solution. The method comprises the steps of performing a hydrolytic decalcification process step, adding phosphoric acid to regulate pH value, and performing microporous filtration, and evaporation concentration to obtain a monocyanamide product. The monocyanamide solution is prepared by improving a gas inlet way of kiln gas and applying a microporous filtration method, an ion exchange resin decalcification technology and a rotary thin film scraper steam method. Compared with a domestic traditional process, by adopting the method, the requirement of the traditional process on the concentration of carbon dioxide is reduced, the content of the calcium ions in the monocyanamide product is strictly controlled, the product quality is improved, the production period is shortened, the energy consumption is reduced, and the production cost is reduced, so that the method is suitable for industrial large-scale production and has good social and economic benefits.

The invention discloses a method for pre-treating a lignocelluloses raw material for enzyme hydrolysis in combination of strong phosphoric acid and hydrogen peroxide. The method comprises the following steps: using strong phosphoric acid as a solvent and hydrogen peroxide as a catalyst to remove lignin and hemicellulose in the lignocelluloses raw material, adding water in the solution to regenerate cellulose in the solution so as to obtain regenerated cellulose which is low in crystalline and polymerization degree and suitable for enzyme hydrolysis, using the regenerated cellulose after filtering and separating for the enzyme hydrolysis to produce fermentable carbohydrate, wherein the hydrolysis efficiency is 75-100%. The method is suitable for lignocelluloses raw materials in different types such as crop stalks, woods and bamboos, wild herbs or woody and the like, the method is simple in operation, low in energy consumption, clean and non-pollution, low in requirement on grain size of raw materials, and strong in raw material adaptability, and the pre-treatment effect is perfect.

A method for preparing an odor-free delicious amino acid through combination of acid hydrolysis and enzymatic hydrolysis of salted egg white belongs to the field of deep processing of bird egg by-products. According to the invention, the salted egg white is taken as a raw material and is then subjected to homogenization, combined action of acid hydrolysis and enzymatic hydrolysis, neutralization and filtering to obtain the odor-free delicious amino acid. The method combining acid hydrolysis and enzymatic hydrolysis replaces a method of direct acid hydrolysis and enzymatic hydrolysis on protein of animals and plants in the traditional process, not only are harmful byproducts and extraneous odor well controlled in the acid hydrolysis process due to the subsequent enzymatic hydrolysis, but also the hydrolysis time is effectively shortened, the pollution to the neighboring environment is reduced, and the state environmental protection requirement is met; the salted egg white whose fat content is about 0.25% is used as the raw material, so that the production of trichloropropanol is inhibited in the process of acid hydrolysis, and then an odor-free amino acid hydrolysate product containing no trichloropropanol is obtained, wherein the degree of hydrolysis of the product is 52%-54%, delicate amino acids (glutamic acid and aspartic acid) and sweet amino acids (alanine, glycine, proline, serine and threonine) account for about 60% of the total amino acids.

The invention relates to a process for preparing corn peptides by taking corn starch sugar residues as raw materials. The process comprises the following steps of: crushing corn starch sugar residues, adding absolute ethyl alcohol to extract a yellow pigment, drying the materials subjected to complete pigment extraction, crushing and sieving, adding water, adjusting the pH value, and respectively adding alkaline protease and flavourzyme to hydrolyze; adjusting the pH value by using hydrochloric acid and adding active carbon to decolor and remove bitter; desalting the obtained feed liquid by using a membrane system, and freezing and drying in vacuum to prepare corn peptides powder. According to the process, the corn starch sugar residues are used as the materials to prepare the corn peptides, and the process is low in cost, material consumption and energy consumption, and is beneficial to the improvement of resource utilization of by-products.

Disclosed is an improvement in a conventional process for C5 and C6 sugar recovery from lignocellulosic biomass for fermentation to ethanol, which process including the conventional steps of pretreatment of the biomass with steam at elevated temperature and pressure, collection of C5 sugars from hemicellulose breakdown, cellulose hydrolysis and collection of C6 sugars from cellulose breakdown. The improvement includes conditioning of the biomass prior to the pretreatment step by heating the biomass with steam for a time period between 5 minutes to 60 minutes to achieve a steam treated biomass having a temperature of about 80 to 100° C.; and adjusting a moisture content of the steam treated biomass to about 45% to 80%. An increased recovery of C5 and C6 sugars is achieved compared to the conventional process.

The invention discloses a production method of furfural, and particularly a novel environmentally-friendly production process for furfural. The method comprises process steps, namely smashing raw materials, adding diluted acid for stirring, exchanging heat and distilling, exchanging heat, dehydrogenating and washing with water, distilling, exchanging heat, discharging a finished product and the like. The process has the advantages that a small amount of waste water is produced in a production process, environmental protection is facilitated, the amount of vapor is reduced, the hydrolyzation time is shortened, the yield is high, the washing process of the finished product is free from neutralization, sodium bicarbonate is saved, the labor intensity of staffs is lowered, waste gas and dust are not produced in the production process, and the like.