35results about How to "Reduce the cost of waste treatment" patented technology

The invention relates to an industrial preparation method of cisatracurium besylate. The preparation method simplifies the refinement operation process, and obtains the high-purity cisatracurium besylate in a non-chromatographic column chromatography preparation mode under the condition of not changing the salt base for the first time. The preparation method can greatly shorten the production cycle, enhance the productivity and increase the yield to 45% above. In the product, the content of cisatracurium besylate is not lower than 98%, the content of total impurities does not exceed 2%, the content of mono quaternary ammonium salts does not exceed 0.2%, the content of other maximum individual impurities does not exceed 0.3%, and the content of isomers does not exceed 0.1%.

A re-utilizing treatment of calcium carbide furnace tail gas is carried out by preparing synthetic ammonia, desulfurizing, denitrifying and obtaining ammonia sulfate by-product. Its advantages include low cost, simple process, no secondary-environmental pollution and waste circulating utilization.

The invention relates to a continuous production system of lithium hexafluorophosphate. The continuous production system comprises a phosphorus pentafluoride generator (2), a micro-channel reactor A (3), a gas-liquid separator A (4), a micro-channel reactor B (6) and a gas-liquid separator B (7), the gas generated by the phosphorus pentafluoride generator (2) is introduced into the micro-channel reactor A (3), the material output by the micro-channel reactor A (3) enters the gas-liquid separator A (4), the gas separated by the gas-liquid separator A (4) enters the micro-channel reactor B (6),and is used as a reaction raw material so as to continuously react, the material output by the micro-channel reactor B (6) enters the gas-liquid separator B (7), and a liquid component is separated out by the gas-liquid separator B (7) and is conveyed into the micro-channel reactor A (3). According to the invention, the raw materials and the by-products are recycled, so that the conversion rate and the utilization rate of the raw materials are improved, and the cost is reduced.

The invention relates to a 5-fluctyosine preparation method suitable for industrial production, belonging to the technical field of pharmaceutical chemical synthesis. The method comprises the following steps: by using 2-methoxy-5-fluorouracil as a raw material, chlorinating with phosphorous pentachloride to obtain 2-methoxy-4-chloro-5-fluoropyrimidine, and concentrating the acidic water phase obtained by after-treatment for later use; carrying out amination reaction on the 2-methoxy-4-chloro-5-fluoropyrimidine and an aminating agent to obtain 2-methoxy-4-amido-5-fluoropyrimidine; and carrying out acidic hydrolysis on the 2-methoxy-4-amido-5-fluoropyrimidine by using the concentrated acidic water phase recycled from chlorination to obtain the 5-fluctyosine. The 5-fluctyosine preparation method provided by the invention has the advantages of high yield, convenient after-treatment and fewer three-waste pollutants, solves the problems of high virulent product consumption, difficulty in acidic waste gas treatment, high pollution, high cost and the like in the traditional technique, and is suitable for industrial production application. The total mole yield is up to 70% or above.

The invention relates to an antimonial ammoxidation catalyst which mainly solves the problem that in the prior art the catalyst is difficult to adapt for the requirement of a fluidized bed and requires raw materials with higher price and the target outcome m-phthalonitrile has low yield. The antimonial ammoxidation catalyst comprises a catalyst active component which is a combination with the following chemical formula by atomic ratio: V1.0SbaAbBcCdOx, wherein A is at least one type of metal out of lithium, sodium, kalium or rubidium or cesium; B is at least one type of metal out of magnesium, calcium, barium, chrome, tungsten, molybdenum, manganese, iron, cobalt, nickel or tin; and C is at least one type of metal out of boron or phosphor. The technical scheme better solves the problem and can be used for industrial production.

The invention provides a vacuum infusion epoxy resin system and a preparation method and application thereof. The vacuum infusion epoxy resin system of the present invention uses epoxy diluent raw materials including polyepoxy tar containing cyclododecane structure, and can obtain A vacuum infusion epoxy resin system with above-moderate initial mix viscosity, low midpoint peak exotherm temperature and long workability time. The present invention provides a vacuum infusion epoxy resin system, the epoxy resin system is prepared by mixing A component and B component, wherein the A component includes bisphenol A epoxy resin and epoxy diluent, The B component includes a polyetheramine curing agent and an alicyclic amine; the epoxy diluent includes a polyepoxy tar containing a cyclododecane structure, and optionally other epoxy diluents.

The invention relates to a processing method of a low-salt chopped pepper blank. The processing method comprises the following steps of chopping peppers at source, adding 5%-7% of salt, 0.05%-0.15% of citric acid, 0.05%-0.10% of calcium chloride and 0.03%-0.05% of potassium sorbate into the chopped pepper, uniformly mixing, and packaging into a multi-layer plastic bag, tightening a bag opening together with an inflating-deflating mechanism, then inflating the multi-layer plastic bag until the pressure intensity reaches 0.5MPa-1.0MPa, and locally storing the multi-layer plastic bag. The low-salt chopped pepper blank prepared by virtue of the processing method can be preserved for 6-12 months; the processing method is easy and convenient to operate; the quality of the preserved pepper blank is close to that of a high-salt pepper blank; additives are accordant with a national food safety standard; a washing desalination process is omitted in a secondary seasoning processing process of the chopped pepper, so that not only are nutrients and flavor quality of the peppers preserved, but also the environmental pollution caused during the desalination is reduced.

The invention relates to a coprocessing method for wastewater of flaw detection by colouring and acid washing wastewater, and belongs to the technical field of environment protection engineering. The method includes: subjecting the wastewater of flaw detection by colouring to ozone oxidation to obtain a first solution, adding the acid washing wastewater to obtain a second solution, adding a NaOH solution to adjust the pH value to obtain a third solution, performing solid-liquid separation to obtain a fourth solution, adsorbing by activated carbon to obtain a fifth solution, adding hydrochloric acid to adjust the pH value to be 7, and discharging. The method fully utilizes characteristics of the wastewater of flaw detection by colouring and the acid washing wastewater which are produced in detection and maintenance processes of metal workpieces, treats waste by using waste, reduces processing devices, reduces the cost for construction and operation, and is simple in operation and management.

The invention discloses a preparation method of methyl p-methoxycinnamate. Add methyl acetate, methanol, sodium methoxide and cyclic ether into the condensation reactor, and react at reflux temperature; then add p-methoxybenzaldehyde, and circulate the reaction solution through the reaction bed filled with catalyst, After the addition of benzaldehyde is completed, the reaction is continued by reflux and insulation, and the water generated by the reaction is separated and removed. By adding methanol and cyclic ether and removing the generated water, the amount of catalyst used can be reduced to a very low level. By circulating the reaction solution through the reaction bed equipped with metal oxide catalysts, the 3 generated in the reaction process ‑Methoxy‑3‑methyl p-methoxyphenylpropionate is converted into methyl p-methoxy cinnamate in time, which improves the purity and yield of the product, and at the same time does not require acid-base neutralization process, and does not generate excess waste water and Compared with traditional processes, other solid wastes have equivalent or higher conversion rates and selectivity, lower production costs, and are more environmentally friendly.

The invention provides a method for extracting pectin from fermented hawthorn wine pomace. The method comprises the following steps: distilling fermented hawthorn pomace with the ratio of the fermented hawthorn pomace to water being (1-2):2; leaching the distilled residue at 85-95 DEG C for an hour; decolorizing by using granular activated carbon (washed by 1%-5% (m / v) deionized water) at 80 DEG C for 30-90 minutes, carrying out low-temperature alcohol participation by using alcohol of which the concentration is 55% (V / V) at 5 DEG C for 12 hours and carrying out room-temperature alcohol washing by using the alcohol of which the concentration is 70% (V / V) for 1 hour; further hydrolyzing protopectin in the pomace into soluble pectin and transferring the soluble pectin into water, and carrying out filter pressing to obtain a filtrate; merging the filtrate with distilled raffinate, and centrifuging, so as to obtain a clear and transparent pectin solution; and carrying out decolorizing by utilizing granular activated carbon washed by deionized water and alcohol participation on the pectin solution, drying and crushing to obtain hawthorn pectin powder. Compared with an acid hydrolysis method, no acid is added to the pectin extraction process, a new acid substance is prevented from being introduced to the system, and the difficulty is reduced for development and utilization of the residue after pectin extraction.

The invention discloses a method for preparing diacetylacyclovir with 7-bit diacetylacyclovir. The 7-bit diacetylacyclovir, 2-oxa-1, 4-butanediol diethyl ester and acetic anhydride react in organic solvents at the controlled temperature of 30-150 DEG C for 1-30h under the action of trifluoromethanesulfonic acid ammonium salt catalysts, and the target product of diacetylacyclovir is obtained by means of separation and purification after reaction. The method is moderate in reaction condition, short in cycle and simple and convenient in operation, the reaction process is easy to control, the 7-bit diacetylacyclovir can be converted into the diacetylacyclovir, the conversion rate is high, and the product with high purity can be obtained by means of simple operation after conversion. By the aid of the conversion process, the cost for treating waste gas, waste water and waste residues is reduced, resource utilization rate is increased, and the method is suitable for industrial production.

The invention discloses a new green industrial preparation method of highly pure dutasteride. The method is realized through a synthetic route represented by a figure shown in the specification. The preparation method is adopted to construct a steroid 1,2-olefinic bond in order to avoid raw materials being harmful to environment and having large toxicity, and use of a severely toxic oxidant DDQ is thoroughly avoided from a reaction principle; and the method has the advantages of high efficiency, high purity, greenization, clean industrialization, strong maneuverability and high yield, and the total yield of a two-step reaction is greater than 80%. An iodo intermediate is purified to easily control the quality of finished dutasteride, the purity of the obtained dutasteride product is not smaller than 99.5%, the content of any single impurity does not exceed 0.1%, and medicinal demands are completely met.