47results about How to "Avoid or reduce pollution" patented technology

The invention relates to the field of organic chemistry, in particular to a method for processing and recovering contacts in the synthetic process of methyl chlorosilane, which is characterized by comprising the following steps: adding an intermediate storage tank of the contacts in the process of synthesizing the methyl chlorosilane; when the selectivity of a target product is reduced to between70 and 90 percent, transferring the contacts in the reaction system to the intermediate storage tank; re-adding new contacts to react in a fluidized bed, and mixing the transferred contacts with fresh silicon powder; and returning the mixture to the fluidized bed to use the mixture as new contacts to be added to the reaction. In the invention, the production method is used to not only ensure the stability of the selectivity for dimethyl dichlorosilane in the synthetic process of the methyl chlorosilane, and prolong the synthetic cycle of organochlorosilane simultaneously. The effective production time of the production device can be up to over 50 days.

The invention discloses an apparatus and a method for determining high temperature wettability. The apparatus comprises a heater body, a heating portion, an extruding dripping portion, a sample supporting portion and an image acquisition and processing portion. The heater body is comprised of a stainless steel cavity, a furnace lid and a No. 3 fluorine rubber ring bolt connecting together. A shielding layer in the heating portion is arranged in the center of a furnace bottom in the heater body, and a heating member is placed at the center of the shielding layer. The extruding dripping portion is perpendicularly arranged on an upper end of the heater body, and a lower end of a thermocouple in the heating portion, a lower end of the extruding dripping portion and an upper end of a sample bench are placed in the heater body. A substrate is placed at top of the sample bench. Two sets of CCD digital cameras or CMOS high speed cameras in the image acquisition and processing portion and a light source are respectively placed at the front and rear and the left and right of the heater body, and are in a same horizontal line with a symmetric axis of a quartz glass observation window, a wall through hole on the shielding layer and a heating member through hole on the heating member. The invention also provides a method for determining high temperature wettability.

The present invention discloses one kind of cigarette filter tip with natural protein fiber silk as the main filter material, which is coated and high temperature and high humidity steam treated to get certain hardness, elasticity and moisture absorbing capacity. Test shows that the cigarette filter tip can block and filter out harmful cigarette smoke matter. The cigarette filter tip made of natural long protein fiber has no toxicity, no inhalation hazard, no environmental pollution, simple preparation process, low cost and wide market foreground.

The invention discloses a wastewater reuse method combining magnetic loading coagulation clarification and membrane separation. The method comprises the following steps: (1) a coagulant is added into a reaction tank to form small flocs; (2) the small flocs enter a loading and mixing tank to generate magnetic coagulation cores with magnetic carriers; (3) after the magnetic coagulation cores enter a flocculation tank, a flocculant is added to generate large-particle magnetic floccules; (4) after the magnetic floccules are stirred and dispersed strongly by a high-speed dispersion machine, magnetic carriers which are recycled via a magnetic drum separator return to the step (2), supernatant liquor enters a middle water tank via the collection by a water collecting pipe, after being pressurized by a water pump, the supernatant liquor enters membrane separating equipment for fine filtration, and filtered water is discharged for reusing. The method is used for removing particulate matters, colloid and a part of dissolved organic matters in advance before membrane filtration, so that membrane pollution degrees can be effectively avoided or reduced, and the cleaning period and the service life of membrane components are increased. The method can be used for the resource reutilization of the wastewater in industries of printing and dyeing, electroplating, paper-making and the like, as well as the upgrading and reconstruction and the tail water reuse of sewage treatment plants.

The invention belongs to the technical field of microorganism gene engineering, and particularly relates to and discloses application of coded chloroplast carbonic anhydrase genes in establishing industrial engineering microalgae capable of resisting high-concentration CO2 and growing quickly. A method disclosed by the invention provides a basis and a practicable method for the industrial microalgae in fixing industrial CO2 waste gas.

Building parts in the moist / wet region of cooling towers prepared from synthetic plastics to which are added additives in suitable amount to prevent subsequent growth of microorganisms.

The invention relates to a method for preparing polyisobutylene amine. The method comprises the following steps: dissolving polyisobutylene with more than or equal to 85% of alpha olefinic bonds in a functional solvent, reacting the solution with hydrogen peroxide at 70-95 DEG C in the presence of acetic acid so as to obtain an intermediate product with epoxy polyisobutylene content of more than or equal to 60% after the reaction, and recycling the acetic acid in the mixed solution by virtue of rectification or membrane separation; adding acid, water or alcohol into the epoxy polyisobutylene, and reacting with ammonia or amine substance at 120-200 DEG C so as to obtain the polyisobutylene amine; recycling volatile matters steamed out from a rotary liquid, wherein the mass ratio of the polyisobutylene, the acetic acid and the hydrogen peroxide is 1:(0.02-0.3):(0.1-0.6); the molar ratio of the epoxy polyisobutylene, the catalytic solvent and the amine substance added in the aminolysis process is 1:(1-10):(2-20); the method is environment-friendly in preparation process, obvious in energy-saving effect and capable of avoiding or reducing resource waste or possible environmental pollution and realizing a recycling economic development mode.

A bimetal spiral steel pipe comprising a pipe body (100), the surface of the pipe body (100) extending outwards to form a rib (102) which is spirally arranged around the outer wall of the pipe body. A groove (103) and an auxiliary inner steel band (200) capable of covering the notch of the groove are provided on the rib (102) and the surface of the pipe body (100). A hollow cavity (300) is formed between the groove (103) and the auxiliary inner steel band (200), and is filled with concrete (400). Also disclosed is a manufacturing method for a bimetal spiral steel pipe. By means of the bimetal spiral steel pipe and the manufacturing method therefor, the rib on the outer wall of the pipe body and the pipe body are integrally formed, and can resist the dynamic load fatigue when bearing dynamic load; the corrosion resistance and wear resistance of the steel pipe are enhanced; further, the thickness of the steel pipe main body is reduced, and material costs are reduced.