Catalyst quantifying device for preparing catechol from phenol

Abstract

The catalyst quantifying device comprises a quantifying cylinder, an inlet and outlet nozzle is arranged at the front end of the quantifying cylinder, a sealing plate is arranged in the quantifying cylinder and is in sliding fit with the inner wall of the quantifying cylinder, a sliding rod is fixedly connected to the end, away from the inlet and outlet nozzle, of the sealing plate, and the end, away from the inlet and outlet nozzle, of the sealing plate is fixedly connected with the sliding rod. According to the device, the adjusting lead screw is driven to rotate by rotating the rotating piece, so that the sliding rod is controlled to move in the axial direction of the sliding rod, and then the position of the sealing plate is adjusted; the catalyst in the storage tank can be extracted through pressure difference by controlling the movement of the sealing plate, and the volume of the catalyst sucked in the quantitative cylinder is measured in real time through the arranged pointer and observation scales, so that quantitative feeding of the catalyst can be realized every time when catechol is prepared.

Description

Technical Field

[0001] The utility model relates to the field of catechol production technology, in particular to a catalyst quantitative device for preparing catechol from phenol. Background Art

[0002] Catechol, also known as catechol, is an organic compound with the chemical formula C6H6O2. It is a white crystalline powder and an important chemical intermediate. It can be used as a rubber hardener, electroplating additive, skin preservative and bactericidal agent, hair dye, photographic developer, color photography antioxidant, etc.

[0003] When preparing catechol, a catalyst needs to be added, and the amount of catalyst added has strict standards. Too little or too much catalyst will affect the quality of the final catechol. The common and lowest-cost quantitative device is the traditional syringe. However, when this quantitative device is used, the amount of catalyst extracted is controlled by pulling the handle of the syringe. This pulling method cannot control the moving distance of the handle well, and the handle extending outward is also easily disturbed by the outside, which causes the sealing plug inside the syringe to shift in position. For this reason, a catalyst quantitative device for preparing catechol from phenol is proposed. Utility Model Content

[0004] The utility model aims to provide a catalyst quantitative device for preparing catechol from phenol, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a catalyst metering device for preparing catechol from phenol, comprising a metering cylinder, an inlet and outlet nozzle being provided at the front end of the metering cylinder, a sealing plate being provided inside the metering cylinder, the sealing plate being slidably fitted with the inner wall of the metering cylinder, a sliding rod being fixedly connected to one end of the sealing plate away from the inlet and outlet nozzle, the other end of the sliding rod slidingly passing through the metering cylinder and extending to the outside of the metering cylinder, and an adjusting mechanism being connected to the protruding end of the sliding rod.

[0006] As a further preferred embodiment of the present technical solution, the sliding rod is a rectangular structure.

[0007] As a further preferred embodiment of the present technical solution, the adjusting mechanism is composed of an adjusting part, a rotating part and an adjusting screw. The adjusting part and the metering cylinder are fixedly connected by a plurality of connecting rods. The protruding end of the sliding rod is slidably inserted into the interior of the adjusting part. A sliding groove that slidably fits with the sliding rod is provided in the interior of the adjusting part. An adjusting screw is rotatably installed on the inner wall of the sliding groove away from the metering cylinder. The other end of the adjusting screw is inserted into the interior of the sliding rod and is connected to the sliding rod by threaded fitting. The end of the adjusting part away from the metering cylinder is rotatably connected to a rotating part, and the rotating part is fixedly connected to the adjusting screw.

[0008] As a further preferred embodiment of the present technical solution, a movable block is fixedly connected to the upper end of the sliding rod, a movable groove extending to the sliding groove is opened on the upper surface of the adjusting member, the movable groove is slidingly fitted with the movable block, a pointer is fixedly connected to the side wall of the movable block, and an observation scale is provided on the upper surface of the adjusting member.

[0009] As a further preferred embodiment of the present technical solution, a plurality of anti-slip slits are provided on the outer wall of the rotating member, and the plurality of anti-slip slits are arranged in a ring array.

[0010] As a further preferred embodiment of the present technical solution, the length of the sliding rod is greater than the length of the metering cylinder.

[0011] As a further preferred embodiment of the present technical solution, reinforcement rods are provided at two adjacent positions of the four side walls of the adjusting member.

[0012] The utility model provides a catalyst quantitative device for preparing catechol from phenol, which has the following beneficial effects:

[0013] The utility model drives the adjusting screw to rotate by rotating the rotating part, thereby controlling the slide rod to move along its axial direction, and then adjusting the position of the sealing plate. The movement of the sealing plate can be controlled to extract the catalyst in the storage tank by using the pressure difference, and the volume of the catalyst absorbed in the metering cylinder can be measured in real time through the provided pointer and observation scale, thereby ensuring that the quantitative delivery of the catalyst can be achieved every time when preparing catechol. Compared with the traditional syringe, the quantitative device controls the movement of the sealing plate by rotating the rotating part, so that the sealing plate can move more slowly and steadily, ensuring that the volume of the extracted catalyst is more accurate, and there is no need to worry that the slide rod connected to the sealing plate will be moved by external force, so that the sealing plate has a stronger anti-interference ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of a part of the structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the dissection of the adjusting member in the utility model;

[0017] Figure 4 It is a structural schematic diagram of the rotating member and the adjusting screw in the utility model;

[0018] In the figure: 1. dosing cylinder; 2. adjusting part; 3. connecting rod; 4. inlet and outlet nozzles; 5. rotating part; 6. anti-slip joint; 7. movable groove; 8. movable block; 9. pointer; 10. observation scale; 11. sealing plate; 12. sliding rod; 13. sliding groove; 14. adjusting screw; 15. reinforcement rod. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] The utility model provides a technical solution: Figures 1 to 4 As shown, in this embodiment, a catalyst quantitative device for preparing phenol to catechol comprises a quantitative cylinder 1, the front end of the quantitative cylinder 1 is provided with an inlet and outlet nozzle 4, the interior of the quantitative cylinder 1 is provided with a sealing plate 11, the sealing plate 11 is slidably fitted with the inner wall of the quantitative cylinder 1, and the end of the sealing plate 11 away from the inlet and outlet nozzle 4 is fixedly connected with a slide rod 12, the slide rod 12 is a rectangular structure, the other end of the slide rod 12 slides through the quantitative cylinder 1 and extends to the outside of the quantitative cylinder 1, the protruding end of the slide rod 12 is connected with an adjustment mechanism, and the adjustment mechanism is composed of an adjustment member 2, a rotating member 5 and an adjustment member. The adjusting member 2 and the metering cylinder 1 are fixedly connected by a plurality of connecting rods 3. The protruding end of the slide rod 12 is slidably inserted into the adjusting member 2. A slide groove 13 slidably fitted with the slide rod 12 is provided in the adjusting member 2. An adjusting screw 14 is rotatably installed on the inner wall of the slide groove 13 away from the metering cylinder 1. The other end of the adjusting screw 14 is inserted into the slide rod 12 and is connected to the slide rod 12 by threaded fitting. The end of the adjusting member 2 away from the metering cylinder 1 is rotatably connected to a rotating member 5, and the rotating member 5 is fixedly connected to the adjusting screw 14.

[0021] Among them, the upper end of the sliding rod 12 is fixedly connected with a movable block 8, the upper surface of the adjusting member 2 is provided with a movable groove 7 extending to the sliding groove 13, the movable groove 7 is slidingly fitted with the movable block 8, the side wall of the movable block 8 is fixedly connected with a pointer 9, and the upper surface of the adjusting member 2 is provided with an observation scale 10.

[0022] The volume of the catalyst absorbed in the metering cylinder 1 can be measured in real time by means of the pointer 9 and the observation scale 10, thereby ensuring that the catalyst can be quantitatively added each time when preparing catechol.

[0023] A plurality of anti-slip slits 6 are provided on the outer wall of the rotating member 5 , and the plurality of anti-slip slits 6 are arranged in a ring array.

[0024] The anti-slip groove 6 can increase the friction between the user's hand and the rotating member 5 .

[0025] The length of the sliding rod 12 is greater than the length of the metering cylinder 1 . This arrangement can ensure that the sealing plate 11 can move from the head end to the end end of the metering cylinder 1 .

[0026] Wherein, reinforcement rods 15 are arranged at two adjacent positions of the four side walls of the adjusting member 2 .

[0027] The reinforcement rod 15 can improve the structural stability of the adjusting member 2 and also make it easier for the user to grip the adjusting member 2 .

[0028] The utility model provides a catalyst quantitative device for preparing catechol from phenol, and the specific working principle is as follows:

[0029] When in use, the rotating member 5 is rotated to drive the adjusting screw 14 to rotate, while the slide bar 12 is a rectangular structure and cannot rotate in the slide groove 13. When the adjusting screw 14 is rotated, the slide bar 12 will move along its axial direction, thereby adjusting the position of the sealing plate 11, controlling the sealing plate 11 to move to the front end of the quantitative cylinder 1, and exhausting the air in the quantitative cylinder 1. Then, the inlet and outlet nozzle 4 at the front end of the quantitative cylinder 1 is inserted into the catalyst storage tank, and the sealing plate 11 is controlled to move toward the rear end of the quantitative cylinder 1, so that the catalyst in the storage tank can be drawn into the quantitative cylinder 1, and the amount of catalyst absorbed in the quantitative cylinder 1 can be measured in real time through the provided pointer 9 and the observation scale 10. The volume of the catalyst taken can ensure that the quantitative dosage of the catalyst can be achieved every time when preparing catechol. After the catalyst enters the metering cylinder 1, since the internal pressure of the metering cylinder is much lower than the external pressure, the catalyst will not flow out from the inlet and outlet nozzles 4 without external interference. Compared with the traditional syringe, the quantitative device controls the movement of the sealing plate 11 by rotating the rotating part 5, which can make the sealing plate 11 move more slowly and steadily, ensuring that the volume of the extracted catalyst is more accurate, and there is no need to worry about the sliding rod 12 connected to the sealing plate 11 being touched by external force and moved, so that the sealing plate 11 has a stronger anti-interference ability.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A catalyst metering device for preparing phenol to catechol, comprising a metering cylinder (1), characterized in that: The front end of the metering cylinder (1) is provided with an inlet and outlet nozzle (4), and the interior of the metering cylinder (1) is provided with a sealing plate (11), the sealing plate (11) is slidably engaged with the inner wall of the metering cylinder (1), and one end of the sealing plate (11) away from the inlet and outlet nozzle (4) is fixedly connected to a sliding rod (12), and the other end of the sliding rod (12) slides through the metering cylinder (1) and extends to the outside of the metering cylinder (1), and the protruding end of the sliding rod (12) is connected to an adjustment mechanism.

2. A catalyst quantitative device for preparing phenol to catechol according to claim 1, characterized in that: The sliding rod (12) is a rectangular structure.

3. The catalyst quantitative device for preparing phenol to catechol according to claim 1, characterized in that: The adjusting mechanism comprises an adjusting member (2), a rotating member (5) and an adjusting screw (14); the adjusting member (2) and the metering cylinder (1) are fixedly connected via a plurality of connecting rods (3); the protruding end of the sliding rod (12) is slidably inserted into the interior of the adjusting member (2); a sliding groove (13) is provided in the interior of the adjusting member (2) and is slidably engaged with the sliding rod (12); an adjusting screw (14) is rotatably mounted on an inner wall of the sliding groove (13) away from the metering cylinder (1); the other end of the adjusting screw (14) is inserted into the interior of the sliding rod (12) and is connected to the sliding rod (12) via a threaded fit; one end of the adjusting member (2) away from the metering cylinder (1) is rotatably connected to the rotating member (5); and the rotating member (5) is fixedly connected to the adjusting screw (14).

4. A catalyst quantitative device for preparing phenol to catechol according to claim 3, characterized in that: The upper end of the slide rod (12) is fixedly connected to a movable block (8); the upper surface of the adjusting member (2) is provided with a movable groove (7) extending to the slide groove (13); the movable groove (7) is slidably engaged with the movable block (8); a pointer (9) is fixedly connected to the side wall of the movable block (8); and an observation scale (10) is provided on the upper surface of the adjusting member (2).

5. The catalyst quantitative device for preparing phenol to catechol according to claim 3, characterized in that: A plurality of anti-slip slits (6) are provided on the outer wall of the rotating member (5), and the plurality of anti-slip slits (6) are arranged in a ring array.

6. A catalyst quantitative device for preparing catechol from phenol according to claim 3, characterized in that: The length of the sliding rod (12) is greater than the length of the metering cylinder (1).

7. The catalyst quantitative device for preparing catechol from phenol according to claim 3, characterized in that: Reinforcement rods (15) are provided at two adjacent positions on each of the four side walls of the adjusting member (2).

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