The present disclosure relates to a preparation method for removing triuret causing turbidity in a urea solution and to a urea solution prepared using the method, and more particularly, to a preparation method, in which urea is introduced to ultrapure water at 15 C. to 24 C. in a magnetic tank with a size of 1 m.sup.3 to 20 m.sup.3, and the mixture is stirred by using a magnetic mixer and filtered through a hollow-fiber type ultrafiltration membrane (having a pore size in a range of 0.01 m to 0.3 m) such that a 32.5% automotive urea solution has a turbidity of 0.02 NTU to 0.2 NTU, and the triuret causing turbidity in a urea solution and reducing conversion efficiency to NH.sub.3 in selective catalytic reduction (SCR) is removed. To achieve the purpose of the present disclosure, there is provided a method of preparing a urea solution by dissolving urea in ultrapure water, wherein the 32.5% automotive urea solution is provided by a preparation method including the steps of: a step of preparing ultrapure water at 15 C. to 24 C.; a step of moving the ultrapure water into a magnetic mixer tank; a step of introducing urea to the ultrapure water contained in the magnetic mixer tank; a step of operating a magnetic mixer to induce vortex effect for mixing and stirring the ultrapure water with urea to prepare a urea solution; and a step of filtering by passing the urea solution including triuret through a hollow-fiber type ultrafiltration filter (U/F) to filtrate 20 L of triuret and impurities per 1,000 L of the urea solution, while maintaining a low temperature of the urea solution resulting from the stirring (S5).

A blender for blending foodstuff comprises a base enclosing a motor, a jar for containing foodstuff that is removably mountable to the base, and a lid removably mountable to the jar to selectively close off the top end. The lid comprises a main body having an opening defined therein, and a cap removably mountable to the main body to selectively close off the opening. When the cap is mounted to the main body and the lid is mounted to the jar, a tortuous airflow path is provided between the main body and cap to allow airflow into or out of the jar.

Disclosed is an electric stirring cup, where one end of a hollow cup body is connected with a cup cover through threaded connection; one end of the hollow cup body far from the cup cover is connected with a base; a connecting end is integrally formed on the base; an inner wall of the one end of the hollow cup body far from the cup cover forms a connecting cavity, the connecting cavity is in threaded connection with the connecting end; a stirring mechanism is installed in the base; and a drinking mechanism is installed on the cup cover. A drink that needs to be stirred is poured in, and after being directly stirred and mixed through the stirring mechanism, the drink may be consumed after the cup cover is unscrewed, whereby the electric stirring cup is easy to use. The hollow cup cavity and the stirring mechanism may be directly cleaned after disassembling the base, whereby the electric stirring cup is easy to clean.

Disclosed is an electric stirring cup, where one end of a hollow cup body is connected with a cup cover through threaded connection; one end of the hollow cup body far from the cup cover is connected with a base; a connecting end is integrally formed on the base; an inner wall of the one end of the hollow cup body far from the cup cover forms a connecting cavity, the connecting cavity is in threaded connection with the connecting end; a stirring mechanism is installed in the base; and a drinking mechanism is installed on the cup cover. A drink that needs to be stirred is poured in, and after being directly stirred and mixed through the stirring mechanism, the drink may be consumed after the cup cover is unscrewed, whereby the electric stirring cup is easy to use. The hollow cup cavity and the stirring mechanism may be directly cleaned after disassembling the base, whereby the electric stirring cup is easy to clean.

A mixing device includes a container for receiving mixing material, with an emptying opening being arranged in the bottom thereof, and a closure cover for closing the emptying opening. The mixing device includes an emptying opening that can be easily and space-savingly opened and closed. The closure cover includes two closure cover portions which can be reciprocated relative to each other between a closed position in which the two closure cover portions are in contact with each other and together form the closure cover and an opened position in which the two closure cover portions are spaced from each other so that an opening is formed between the two closure cover portions for removal of the mixing material from the container.

A mixing apparatus (1) for mixing slaughter offal with a preservative agent, the apparatus comprising an offal collection tank (3) with a bottom (4) provided with a discharge opening (5) connectable to a closable discharge, an agitator (8) extending into the offal collection tank, and a pump unit (9) operatively connectable to the discharge, wherein the apparatus further comprises a preservative reservoir (7) mounted on top of the collection tank (3). A collection and preservation system is provided, wherein the addition of preservation agent can be strictly controlled, can easily and quickly be installed and connected when it is to be used. After use, the system is easily removed and cleaned.

Aerator device for introducing gas bubbles into a liquid and comprising a base member with a gas supply and an elastic perforated membrane attached to the base member, and further with a UV protecting cover member, said UV protecting cover member or at least a part thereof being arranged above the membrane to protect the membrane against UV radiation during shipping and storage.

A lid (1) for closing a can having a collar, the lid having a bottom face (2) provided with an annular sealing gasket (4) bearing against said collar when the lid (1) is in the closed state, and being provided with fastener means (14) for fastening the lid (1) to the can, which fastener means (14) comprise at least two catches (141, 142, 143) disposed about the sealing gasket (4) and having an active fastener portion (1411, 1421, 1431) that projects towards the center of the lid (1), and that is positionable under an external radial peripheral rim of the can when a movable one (143) of the catches is in a closer position in which it is closer to the other catches (141, 142). The movable catch (143) is mounted to move about an axis (XX) or in a plane that is substantially parallel to a circumferential plane of the annular gasket (4), and the lid (1) is provided with locking means (19) for locking said movable catch (143) in the closer position in which its active fastener portion is closer to the active fastener portions of the other catches (141, 142), these locking means (19) being unlockable.

A pouring shield for a stand mixer includes an upper collar for mounting to a mixer head of the stand mixer in a friction-fit manner without the need for clamps or other mounting accessories. The stand mixer is configured to receive a mixing bowl with an open top, and the pouring shield is configured to cover the open top of the mixing bowl at an upper rim of the mixing bowl using a seal member which is disposed around an outer perimeter of the pouring shield. The seal member is a flexibly resilient member configured to close the open top of the mixing bowl when the stand mixer is in a closed position, and includes a wide surface for accommodating mixing bowls of various sizes.

Disclosed is an agitator lid suitable for different paint pot openings, comprising a paint outlet mechanism for controlling paint pouring, and at least two compression mechanisms compressing a paint pot with the agitator lid, each compression mechanism involving: a through-hole provided on the agitator lid, a compression rod passing through the through-hole, a sealing sleeve sheathed on the outside of the compression rod, an up-turned edge of the sealing sleeve pressing on the agitator lid, the periphery of the compression rod between the up-turned edge of the sealing sleeve and a handle on an upper end of the compression rod being sheathed with a compression spring, a lower end of the compression rod being a presser foot, a face of the presser foot being a fan ring shape, a vertical face being provided on a connecting line between two arc-shaped lines along the fan ring shape, and the vertical face dividing a fan ring face into two step-shaped presser foot faces of different heights.