104results about How to "Eliminate environmental pollution" patented technology

A clean process for preparing 16-dehydropregnenolone and its analog includes cracking steroid sapogenin to obtain pseudo-steroid sapogenin, reacting on H2O2 in organic solvent under existance of metallic catalyst and acid, and reacting on alkali to obtain 16-dehydropregneno / one or its analog and 3R (or S)- methyl-4-hydroxy-valerate. Its advantages are high output rate and no environmental pollution.

Apparatus (20) for safely casting a fishing hook (500) and fishing line includes a float (22) having a cavity (28) for receiving the bait (501), fishing hook (500), leader (506), and sinker (24). The sinker is slidably received in the mouth (34) of the cavity (28) which is at the front end (30) of the float. The main fishing line (502) is tied to the front of the sinker and passes through a secondary tube (42) inside the float exiting the rear end (32) to the fisherman. Float (22) and installed sinker (24) have a streamlined configuration. The fisherman casts the apparatus over the water (510) using a fishing rod. Upon impact of the apparatus with the water, the sinker continues due to inertia pulling the leader, fishing hook, and bait out of the cavity allowing them to sink into the water.

The invention discloses an anti-theft system of a mobile phone, and belongs to the technical field of telecommunication. The anti-theft system of the mobile phone comprises a primary machine and a secondary machine. The primary machine is communicated with the secondary machine through wireless electric signals. The anti-theft system of the mobile phone has the advantages that after an anti-theft device is turned on, if the mobile phone is stolen, the mobile phone can give an alarm in 1s-2s, rings all the time and is free of influences when turned on or turned off; the large alarm sound can help a user determine the position of the mobile phone; the anti-theft device has the anti-lost function, and when the user places the mobile phone at a certain place and forgets to take the mobile phone, the mobile phone can give an alarm to remind the user when the mobile phone is more than 8m away from the user; a battery lock can automatically lock the mobile phone when the mobile phone is turned on, and the battery lock can not unlock the mobile phone under the situation that fingerprints of the user do not exist, so that a thief is prevented from disassembling a battery to forcefully break off the alarm after stealing the mobile phone; due to the use of a fingerprint identification board, the anti-theft device of the mobile phone is safer and more convenient to use; in addition, the fingerprint identification board of the anti-theft device of the mobile phone can be shared with other functions of the mobile phone, and the functions of the mobile phone are added; the price of the anti-theft device of the mobile phone is only 170 RMB, and the anti-theft device of the mobile phone is excellent in quality and reasonable in price from the point of view of the cost performance.

A method is provided for preparing a particulate phase toner for use in an electrophotographic image forming apparatus. The method uses fractional dissolution rather than pulverization and chemical preparation. Accordingly, it is easy to control the size and the shape of toner particles. The fluidity of the toner particles according to the invention is improved. The method of the invention also reduces or eliminate the environmental pollution. A particulate phase toner prepared by the method is also provided.

The invention discloses a wastewater zero discharge method in a manufacturing process of island superfine fiber synthetic leather. The method comprises the following steps: merging an alkali-minimization wastewater and a dyeing wastewater into a wastewater regulating reservoir, or merging the alkali-minimization wastewater into the wastewater regulating reservoir; adding acid to the wastewater regulating reservoir to form a solid matter; transferring the wastewater after the solid matter is cleaned into a turntable solid-liquid separator; adding a polyacrylamide flocculant and a polyaluminium chloride flocculant; evaporating the solid matter and the sludge obtained by solid-liquid separation in an evaporation tank, and simultaneously collecting distilled water in a condensation manner; transferring the wastewater from solid-liquid separation into a multi-effect evaporator to evaporate, and collecting distilled water by condensation; merging the residual residue in the evaporator into a sludge concentrating tank to continue to process. The production of the island superfine fiber synthetic leather is taken as a basic system, and is combined with collection, treatment and comprehensive utilization technologies of the production wastewater and the solid matter, the technical bottlenecks of wastewater zero discharge in the production process is solved, and the island superfine fiber synthetic leather which is friendly to environment and high in quality can be produced.

The invention discloses a method for producing two-layer transfer coating leather by aqueous polyurethane dry-method transfer coating process. The method comprises the following steps of: firstly coating a bottom-closing foamed coating material on the surface of the split leather by use of a roll coating machine in leather production, and drying and then ironing by use of a drum-type ironing machine to form a bottom-closing foamed coating; then blade coating a top coating material and an adhesive coating material on release paper by use of a dry-method production line in synthetic leather production process; and finally, bonding the split leather with the bottom-closing foamed coating and the release paper with the adhesive coating, drying in a drying channel, cooling, separating, and transferring the coatings on the release paper onto the bottom-closing foamed coating, to obtain the two-layer transfer coating leather. The method produces the two-layer transfer coating leather by aqueous polyurethane dry-method transfer coating process and replaces the solvent-type polyurethane production system by the aqueous polyurethane production system, so as to eliminate pollution caused by solvents and solve the problem of MDF residues in the two-layer transfer coating leather. Besides, the method can enhance water permeability and vapor permeability of the coatings and improve health performance of the two-layer transfer coating leather final product.

The invention discloses a lead connection device and connection method. The lead connection device comprises a power source, a top electrode, a bottom electrode, a switch and a metal wrapping piece. The top electrode is connected with the power source and can move vertically. The bottom electrode is located below the top electrode and connected with the power source. The switch is arranged on a circuit where the top electrode is connected with the power source or on a circuit where the bottom electrode is connected with the power source. The metal wrapping piece is an annular piece provided with a notch, the metal wrapping piece is arranged between the top electrode and the bottom electrode so that the power source, the top electrode, the bottom electrode and the metal wrapping piece can form a current loop, and the top electrode drives the metal wrapping piece to deform when moving vertically so that the upper end and the lower end of the notch can make contact with each other. The lead connection device can greatly reduce labor cost and labor intensity of operation staff, greatly improve production efficiency, eliminate potential quality hazards such as faulty soldering and fusion welding incompletion caused by human factors in the prior art, and avoid environmental pollution caused by burn-in.

The invention discloses a tea leaf residue modified oxidized cellulose composite film, and a preparation method and an application thereof. The tea leaf residue modified oxidized cellulose composite film is obtained by an imine chemical reaction of an aldehyde group in a selectively oxidized cellulose molecule and an amino group in tea leaf residue. The tea leaf residue modified oxidized cellulosecomposite film prepared in the invention has good mechanical strength, biodegradability and anti-oxidation performance, is safe and sanitary, can be used for fresh-keeping of fresh pork at room temperature, and can prolong the shelf life of foods.