59 results about "Formaldehyde product" patented technology

The invention belongs to the technical field of functional polypeptides and discloses a collagen polypeptide rich in glycine and a formaldehyde scavenger prepared therefrom. The collagen polypeptide is prepared from the following steps: extracting collagens by means of a hot water extraction method; and then preparing the collagen polypeptide rich in glycine by enzymolysis of the collagens by means of protease by taking Tilapia mossambica waste as a raw material. By being combined with plant polyphenol compounds, the quick, long-acting, safe and edible formaldehyde scavenger is prepared. The formaldehyde removal rate of the formaldehyde scavenger can reach 95% or above within 10 min, so that the problem that a single amino acid is not ideal in removing formaldehyde is solved. A colloid film which is 2-10 microns can be formed on the surface of an object such as furniture if being dried to inhibit further release of formaldehyde. The formaldehyde removal rate can be kept at 95% or abovewithin three months, an effect of removing formaldehyde for a long time is achieved, and the problem that existing formaldehyde removal products are rebound in effect and short in effective period issolved.

An apparatus to co-produce formaldehyde and UFC (urea-formaldehyde concentrate) by iron-molybdenum process comprises a methanol evaporator, a methanol oxidizer and an absorbing column; fresh air and methanol vapor are mixed in the methanol evaporator, and formaldehyde is generated in the methanol oxidizer; formaldehyde vapor enters the absorbing column via the methanol evaporator; in the absorbingcolumn, the formaldehyde vapor is liquefied, and a liquid formaldehyde product is attained from the bottom; urea and an alkali liquid are added into the absorbing column to react with the formaldehyde to obtain UFC. The apparatus has the advantages that consumption indexes are good, single consumption of formaldehyde is 0.422-0.426 t, byproduct vapor specification is high, up to 22 bar 0.75 t / t,oxidation temperature is controlled to 245-380 DEG C, the methanol oxidizer has designed life up to 20 years and longer, the whole apparatus has designed life of not shorter than 35 years, the apparatus is suitable for flexibly producing formaldehyde products having a concentration of 37-55%, UFC can be produced just by proportionally adding an alkali liquid, and in order to further increase absorbing efficiency of process water, sodium hydroxide solution can be injected into the system to remove the byproduct, formic acid.

The invention provides an environmental-protection cleaning technology for producing hydrocyanic acid derivatives by comprehensive utilization of coke oven gas. The environmental-protection cleaning technology is characterized in that 1, through the environmental-protection cleaning technology, coke oven gas is processed into relatively concentrated methane gas having relatively-low quality requirements by separation processes of pressure swing adsorption and the like, and the methane gas as a raw material is used for production of hydrocyanic acid derivatives; and 2, the environmental-protection cleaning technology concretely comprises the following steps that coke oven gas is separated by the separation processes of pressure swing adsorption and the like so that methane gas, hydrogen, carbon monoxide and tail gas are obtained; methane gas is synthesized into hydrocyanic acid mixed gas by ammonium oxidation or ammoniation dehydrogenation, and the hydrocyanic acid mixed gas reacts with a sodium hydroxide aqueous solution to produce sodium cyanide for synthesis of downstream hydrocyanic acid derivatives, or the hydrocyanic acid mixed gas and formaldehyde or other aldehydes are synthesized into hydroxyacetonitrile or other derivatives for synthesis of downstream hydrocyanic acid derivatives, or the hydrocyanic acid mixed gas is absorbed by water or other solvents and the solution is purified into high-purity hydrocyanic acid for synthesis of downstream hydrocyanic acid derivatives; hydrogen is used for synthesis of ammonia; and carbon monoxide and tail gas are used for synthesis of methanol and the synthesized methanol can be further oxidized into a formaldehyde product.

The invention relates to a production method for producing low-alcohol and high-concentration formaldehyde. This method is an improvement on the traditional silver method. It uses the higher-temperature product gas after recovering heat from the waste heat boiler as a heat source to dealcoholize and dehydrate the formaldehyde in the first absorption tower, and then utilizes the gradual decrease in the temperature of the absorption system. Part of the alcohol-containing dilute formaldehyde extracted from a certain part of the absorption tower is returned to the evaporator to realize the cycle process of dealcoholization-reuse. According to the actual situation of formaldehyde production, the present invention skillfully integrates the rectification method into the formaldehyde production process. The process is simple, the unit consumption of methanol is low, the investment is low, and the energy utilization is reasonable. The method can be used to produce alcohol with low content and low alcohol content at a relatively low cost. Formaldehyde products with high formaldehyde concentration are suitable for popularization and application.

The invention relates to a controllable natural biological odour removing and formaldehyde removing product, as well as a preparation method and application thereof. A plant protein enzyme is obtained by placing a plant on ice, adding a solvent into the plant, grinding the plant in a mortar by using liquid nitrogen, adding the plant into an extracting solution after the plant is ground, standing the mixture on the ice for three to four hours, centrifuging the mixture at 11,100 rpm / 20 minutes / 4 DEG C at a low temperature, and extracting to obtain supernate. The protein enzyme and water are prepared, are added into a plastic bottle, are adsorbed through a cylindrical 7mm*70mm porous enamel rod, and are continuously evaporated at a certain controllable temperature through a top heater, so that the effects of removing the odour and removing the formaldehyde indoors are achieved; 95 percent of carbon monoxide, 99 percent of the formaldehyde, 95 percent of nitrogen peroxide, 90 percent of benzene and 92 percent of trichloroethylene are removed.

The invention discloses a method for electrocatalytic oxidation treatment of industrial wastewater containing methanol and formaldehyde. An active oxide coating electrode with electrocatalytic function is used for electrocatalytic oxidation treatment of industrial wastewater containing methanol and formaldehyde. Operating process conditions: the operating voltage is 3~100V, current 0.01A / cm2~2.60A / cm2. The invention has the advantages of simple treatment process, convenient operation, stable performance, high efficiency, low power consumption, less investment and low cost. The coating electrode has stable properties and has a good application prospect in the field of treating such industrial wastewater and recycling. The COD content in the water after wastewater treatment in the production of methanol and formaldehyde series products can be reduced to less than 30 mg / L, and the pH value after treatment is neutral, which can make the wastewater treatment in the production of methanol and formaldehyde series products reach recycling recycling The quality requirements stipulated by the national and chemical industry standards used.