High-stability hydrobromic acid and a device for preparing the same

Abstract

This invention provides a highly stable hydrobromic acid and its preparation device. The highly stable hydrobromic acid comprises (I) a homogeneous liquid composed of hydrogen bromide gas and a preparation agent, wherein the ratio of hydrogen bromide gas to preparation agent is 10–35:65–90; or (II) a homogeneous liquid composed of an aqueous solution of hydrogen bromide or hydrogen bromide gas, a preparation agent, and water; wherein the mass percentage of the aqueous solution of hydrogen bromide or hydrogen bromide gas, the preparation agent, and water is 20–47:0.5–65:1.0–79.5; the preparation agent is at least one selected from oxalic acid, ascorbic acid, hydrazine hydrate, acetaldehyde, formaldehyde, formic acid, and glacial acetic acid. This preparation device achieves preparation in a closed system, effectively avoiding the emission of harmful substances and environmental pollution; the device is reasonably designed, highly practical, and easy to operate; using this device, a hydrobromic acid product with high consistency in quality can be obtained; and the obtained hydrobromic acid has high stability.

Description

Technical Field

[0001] This invention relates to the field of hydrobromic acid preparation technology, specifically to a highly stable hydrobromic acid and its preparation apparatus. Background Technology

[0002] Hydrogen bromide is a colored gas with a pungent odor, readily soluble in water, and its aqueous solution is hydrobromic acid. Hydrobromic acid is a widely used raw material, used in medicine for the synthesis of sedatives, in industry as a solvent and catalyst for metal minerals, and in the petroleum industry as an alkylation catalyst.

[0003] During the manufacturing, transportation, and use of hydrobromic acid, bromide ions are easily oxidized to elemental bromine, causing the hydrobromic acid solution to turn yellow. The presence of free elemental bromine in the solution increases the corrosiveness of hydrobromic acid, affecting the safety of transportation equipment. In addition, when the amount of free bromine in hydrobromic acid increases, its use as a catalyst will lead to a decrease in catalyst activity and selectivity.

[0004] The instability of hydrobromic acid is mainly due to the inherent instability of the prepared hydrobromic acid and the oxidation of hydrobromic acid caused by equipment factors during the preparation process. Therefore, providing a stable method and equipment for preparing hydrobromic acid is of great significance to its stability. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a highly stable hydrobromic acid and its preparation device. The hydrobromic acid is composed of hydrogen bromide gas and a preparation agent; or of an aqueous solution of hydrogen bromide or hydrogen bromide gas, a preparation agent, and water. This preparation device enables preparation within a closed system, effectively preventing the emission of harmful substances and environmental pollution. The device is rationally designed, highly practical, and easy to operate. Using this device, a hydrobromic acid product with high consistency in quality can be obtained, and the obtained hydrobromic acid exhibits high stability.

[0006] The technical solution of the present invention is as follows:

[0007] A highly stable hydrobromic acid, comprising:

[0008] (I) A homogeneous liquid composed of hydrogen bromide gas and a conditioning agent, wherein the ratio of hydrogen bromide gas to conditioning agent is 10-35:65-90;

[0009] or

[0010] (II) A homogeneous liquid composed of aqueous solution or gaseous hydrogen bromide, a conditioning agent and water; wherein the mass percentage of aqueous solution or gaseous hydrogen bromide, a conditioning agent and water is 20–47:0.5–65:1.0–79.5.

[0011] The formulation agent is at least one of oxalic acid, ascorbic acid, hydrazine hydrate, acetaldehyde, formaldehyde, formic acid, and glacial acetic acid.

[0012] Highly stable hydrobromic acid is obtained by uniformly mixing hydrogen bromide gas and a blending agent using a blending device, or by uniformly mixing hydrogen bromide aqueous solution, hydrogen bromide gas, a blending agent, and water.

[0013] Preferably, the hydrogen bromide solution contains 48-60% hydrogen bromide; the hydrogen bromide gas is high-purity hydrogen bromide gas or a mixture of hydrogen bromide and hydrogen, wherein the hydrogen bromide content is 80-99.8%.

[0014] The aforementioned equipment for preparing highly stable hydrobromic acid includes a container, a pump, a buffer tank, and a waste gas absorber.

[0015] The container is equipped with a weighing module, a discharge port, and an air inlet at the bottom, and a feed inlet and a gas outlet at the top.

[0016] The pump has two inlets, one connected to the outlet and the other to the liquid storage tank; the pump also has two outlets, one connected to the inlet and the other to the transport tank.

[0017] The gas port is connected to a breather valve, which can automatically release pressure when the pressure inside the container is too high; the breather valve is connected to an inert gas pipe and an exhaust pipe, the exhaust pipe is connected to the waste gas absorber, and the waste gas absorber is connected to the buffer tank.

[0018] The inert gas pipe is equipped with a self-regulating valve, which can automatically replenish inert gas according to the pressure inside the container when the pressure inside the container decreases.

[0019] During use, the weighing module weighs the liquid in the container to achieve accurate measurement. The mixing device adopts a closed mixing process, and the pressure in the container can be controlled through an inert gas pipe and an vent pipe during the mixing process to minimize the entry of air into the container and oxidize the hydrobromic acid, thus ensuring the quality of the hydrobromic acid during the preparation process. In addition, after the mixing is completed, the mixing device uses a pump to directly send the mixed hydrobromic acid into the transport tank, reducing the entry of air and ensuring the quality of the hydrobromic acid during transportation.

[0020] Preferably, the container has legs at the bottom, and the weighing module is mounted on the legs.

[0021] Preferably, a level gauge is installed on the side of the container to further measure the liquid level.

[0022] Preferably, for pressure control in the container, a balance port is provided at the top of the container, the balance port is connected to a balance pipe, and the balance pipe is connected to a buffer tank for pressure control in the container.

[0023] Preferably, a sampling pipe is installed on the connecting pipeline between the discharge port and the pump, and a valve A is installed on the sampling pipe to facilitate sampling and monitoring of the prepared hydrobromic acid.

[0024] Preferably, valve B is installed on the connecting pipeline between the pump and the liquid storage tank, and valve C is installed on the connecting pipeline between the pump and the discharge port, with valves B and C connected in parallel; valve D is installed on the connecting pipeline between the pump and the transport tank, and valve E is installed on the connecting pipeline between the pump and the inlet, with valves D and E connected in parallel; when liquid needs to be delivered into the container, valves B and E are opened, and valves C and D are closed; when liquid needs to be emptied from the container, valves C and D are opened, and valves B and E are closed.

[0025] Preferably, the waste gas absorber is equipped with an absorbent liquid inlet, through which the absorbent liquid enters the waste gas absorber to absorb the waste gas discharged from the container, thereby preventing the gas from causing pollution and harm to the environment after it is discharged.

[0026] Preferably, the exhaust gas absorber is provided with an exhaust port, which relieves pressure on the exhaust gas absorber.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1. The mixing device provided by the present invention has a container equipped with a weighing module, which can ensure accurate material delivery and thus ensure the raw material composition of hydrobromic acid; the breather valve can depressurize the container to ensure safe use of the instrument; and the self-regulating valve on the inert gas tube can maintain the pressure in the container, effectively preventing air from entering the container and oxidizing the hydrobromic acid, thus ensuring product quality.

[0029] 2. The hydrobromic acid provided by the present invention, when prepared using the above-mentioned mixing device, yields products with high consistency in quality and high stability.

[0030] 3. In the mixing device provided by the present invention, when feeding material into the container, the vent pipe connected to the breather valve discharges the hydrobromic acid waste gas in the container into the waste gas absorber, where the water in the waste gas absorber absorbs it; when the pH in the waste gas absorber reaches the preset value or the absorption is saturated, the absorbent is discharged into the buffer tank, which is conducive to the absorption of hydrobromic acid waste gas entering the waste gas absorber next time.

[0031] 4. The mixing device provided by this invention realizes mixing in a closed system, effectively avoiding the emission of harmful substances and environmental pollution; the mixing device has the advantages of reasonable design, strong practicality and easy operation; using the mixing device, a hydrobromic acid product with high quality consistency can be obtained; and the obtained hydrobromic acid has high stability. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the mixing device.

[0034] In the diagram, 1-container, 2-pump, 3-buffer tank, 4-waste gas absorber, 5-support leg, 6-weighing module, 7-air inlet, 8-level gauge, 9-discharge port, 10-feed inlet, 11-gas port, 12-balance port, 13-liquid storage tank, 14-transport tank, 15-sampling tube, 16-valve A, 17-valve B, 18-valve C, 19-valve D, 20-valve E, 21-breathing valve, 22-inert gas pipe, 23-vent pipe, 24-self-regulating valve, 25-absorbent inlet, 26-exhaust port. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0036] Example 1

[0037] like Figure 1 As shown, the present invention provides a preparation device for highly stable hydrobromic acid, including a container 1, a pump 2, a buffer tank 3, and a waste gas absorber 4;

[0038] The bottom of container 1 is provided with support legs 5, and a weighing module 6 is installed on the support legs 5; an air inlet 7 is also provided at the bottom of container 1; hydrogen bromide gas is introduced into container 1 through the air inlet 7.

[0039] A level gauge 8 is installed on the side of container 1, which can observe the amount of liquid inside container 1.

[0040] A discharge port 9 is provided at the bottom of container 1, and a feed port 10 and a gas port 11 are provided at the top of container 1.

[0041] To control the pressure in container 1, a balance port 12 is provided at the top of container 1. The balance port 12 is connected to a balance pipe, which is connected to a buffer tank 3 for controlling the pressure in container 1.

[0042] The pump 2 has two inlets, one connected to the outlet 9 and the other connected to the liquid storage tank 13; the pump 2 has two outlets, one connected to the inlet 10 and the other connected to the transport tank 14.

[0043] A sampling pipe 15 is installed on the connecting pipe between the discharge port 9 and the pump 2. A valve A16 is installed on the sampling pipe 15 to facilitate sampling and monitoring of the prepared hydrobromic acid.

[0044] A valve B17 is installed on the connecting pipeline between pump 2 and liquid storage tank 13, and a valve C18 is installed on the connecting pipeline between pump 2 and sampling pipe 14. Valves B17 and C18 are connected in parallel. A valve D19 is installed on the connecting pipeline between pump 2 and transport tank 14, and a valve E20 is installed on the connecting pipeline between pump 2 and inlet 10. Valves D19 and E20 are connected in parallel. When it is necessary to deliver liquid to container 1, valves B17 and E20 are opened, and valves C18 and D19 are closed. When it is necessary to drain the liquid from container 1, valves C18 and D19 are opened, and valves B17 and E20 are closed.

[0045] The gas port 11 is connected to a breathing valve 21, which can automatically release pressure when the pressure inside the container 1 is too high; the breathing valve 21 is connected to an inert gas pipe 22 and an exhaust pipe 23, the exhaust pipe 23 is connected to the waste gas absorber 4, and the waste gas absorber 4 is connected to the buffer tank 12 and the buffer tank 123.

[0046] The inert gas pipe 22 is equipped with a self-regulating valve 24, which can automatically replenish inert gas according to the pressure inside the container 1 when the pressure inside the container 1 decreases.

[0047] The waste gas absorber 4 is equipped with an absorbent liquid inlet 25. The absorbent liquid enters the waste gas absorber 4 through the absorbent liquid inlet 25 to absorb the waste gas discharged from the container 1, so as to avoid pollution and harm to the environment after the gas is discharged.

[0048] The exhaust gas absorber 4 is provided with an exhaust port 26, which relieves pressure on the exhaust gas absorber 4.

[0049] During use, the weighing module 6 weighs the liquid in container 1 to achieve accurate measurement. The mixing device adopts a closed mixing process, and the pressure in container 1 can be controlled through the inert gas pipe 22 and the vent pipe 23 during the mixing process, so as to avoid air entering container 1 and oxidizing hydrobromic acid, thus ensuring the quality of hydrobromic acid during the preparation process. In addition, the mixing device mixes hydrogen bromide gas, mixing agent, or hydrogen bromide aqueous solution, or hydrogen bromide gas, mixing agent and water. The mixing process uses pump 2 for circulation mixing. After the mixing is completed, the mixing device directly sends the mixed hydrobromic acid into the transport tank 14 through pump 2, reducing the entry of air and ensuring the quality of hydrobromic acid during transportation.

[0050] Example 2

[0051] A highly stable hydrobromic acid is composed of hydrogen bromide gas and glacial acetic acid, wherein the mass percentage of hydrogen bromide gas to glacial acetic acid is 32:68; the hydrobromic acid solution is prepared using the preparation device of Example 1.

[0052] Example 3

[0053] A highly stable hydrobromic acid is composed of hydrogen bromide gas and acetaldehyde, wherein the mass percentage of hydrogen bromide gas and acetaldehyde is 20:80; the hydrobromic acid solution is prepared using the preparation device of Example 1.

[0054] Example 4

[0055] A highly stable hydrobromic acid is composed of hydrogen bromide gas and oxalic acid, wherein the mass percentage of hydrogen bromide gas and oxalic acid is 10:90; the hydrobromic acid solution is prepared using the preparation device of Example 1.

[0056] Example 5

[0057] A highly stable hydrobromic acid is composed of hydrogen bromide gas and ascorbic acid, wherein the mass percentage of hydrogen bromide gas and ascorbic acid is 35:65; the hydrobromic acid solution is prepared using the preparation device of Example 1.

[0058] Example 6

[0059] A highly stable hydrobromic acid is composed of hydrogen bromide gas and hydrazine hydrate, wherein the mass percentage of hydrogen bromide gas and hydrazine hydrate is 20:80; the hydrobromic acid solution is prepared using the preparation device of Example 1.

[0060] Example 7

[0061] A highly stable hydrobromic acid is composed of hydrogen bromide gas and formaldehyde, wherein the mass percentage of hydrogen bromide gas and formaldehyde is 25:75; the hydrobromic acid solution is prepared using the preparation device of Example 1.

[0062] Example 8

[0063] A highly stable hydrobromic acid is composed of hydrogen bromide gas and formic acid, wherein the mass percentage of hydrogen bromide gas and formic acid is 25:75; the hydrobromic acid solution is prepared using the preparation device of Example 1.

[0064] Example 9

[0065] A highly stable hydrobromic acid is composed of hydrogen bromide gas, glacial acetic acid, and water, wherein the mass percentages of hydrogen bromide gas, glacial acetic acid, and water are 33:64:3.0; the hydrobromic acid solution is prepared using the preparation apparatus of Example 1.

[0066] Example 10

[0067] A highly stable hydrobromic acid is composed of hydrogen bromide gas, oxalic acid, and water, wherein the mass percentages of hydrogen bromide gas, oxalic acid, and water are 20:0.5:79.5; the hydrobromic acid solution is prepared using the preparation apparatus of Example 1.

[0068] Example 11

[0069] A highly stable hydrobromic acid is composed of hydrogen bromide gas, ascorbic acid, and water, wherein the mass percentages of hydrogen bromide gas, ascorbic acid, and water are 47:23:30; the hydrobromic acid solution is prepared using the preparation apparatus of Example 1.

[0070] Example 12

[0071] A highly stable hydrobromic acid is composed of hydrogen bromide gas, hydrazine hydrate, and water, wherein the mass percentages of hydrogen bromide gas, hydrazine hydrate, and water are 20:65:15; the hydrobromic acid solution is prepared using the preparation apparatus of Example 1.

[0072] Example 13

[0073] A highly stable hydrobromic acid is composed of hydrogen bromide gas, acetaldehyde, and water, wherein the mass percentages of hydrogen bromide gas, acetaldehyde, and water are 47:0.5:52.5; the hydrobromic acid solution is prepared using the preparation apparatus of Example 1.

[0074] Example 14

[0075] A highly stable hydrobromic acid is composed of hydrogen bromide gas, formaldehyde, and water, wherein the mass percentages of hydrogen bromide gas, formaldehyde, and water are 30:30:40; the hydrobromic acid solution is prepared using the preparation apparatus of Example 1.

[0076] Example 15

[0077] A highly stable hydrobromic acid is composed of hydrogen bromide gas, formic acid, and water, wherein the mass percentages of hydrogen bromide gas, formic acid, and water are 25:25:50; the hydrobromic acid solution is prepared using the preparation apparatus of Example 1.

[0078] In the above embodiments, the hydrogen bromide gas used in Examples 2-5 and Examples 9-12 was high-purity hydrogen bromide gas; the hydrogen bromide gas used in Examples 6 and 13 was a mixture of hydrogen bromide and hydrogen, wherein the hydrogen bromide content was 93%; the hydrogen bromide gas used in Examples 7 and 14 was a mixture of hydrogen bromide and hydrogen, wherein the hydrogen bromide content was 80%; and the hydrogen bromide gas used in Examples 8 and 15 was a mixture of hydrogen bromide and hydrogen, wherein the hydrogen bromide content was 99.8%.

[0079] Example 16

[0080] A highly stable hydrobromic acid is composed of an aqueous solution of hydrogen bromide, glacial acetic acid, and water, wherein the mass percentages of hydrogen bromide gas, glacial acetic acid, and water are 33:64:3.0; the hydrobromic acid solution is prepared using the preparation apparatus of Example 1.

[0081] Example 17

[0082] A highly stable hydrobromic acid is composed of an aqueous solution of hydrogen bromide, oxalic acid, and water, wherein the mass percentages of hydrogen bromide gas, oxalic acid, and water are 20:0.5:79.5; the hydrobromic acid solution is prepared using the preparation apparatus of Example 1.

[0083] Example 18

[0084] A highly stable hydrobromic acid is composed of an aqueous solution of hydrogen bromide, ascorbic acid, and water, wherein the mass percentages of hydrogen bromide gas, ascorbic acid, and water are 47:23:30; the hydrobromic acid solution is prepared using the preparation apparatus of Example 1.

[0085] Example 19

[0086] A highly stable hydrobromic acid is composed of an aqueous solution of hydrogen bromide, hydrazine hydrate, and water, wherein the mass percentages of hydrogen bromide gas, hydrazine hydrate, and water are 20:65:15; the hydrobromic acid solution is prepared using the preparation apparatus of Example 1.

[0087] Example 20

[0088] A highly stable hydrobromic acid is composed of an aqueous solution of hydrogen bromide, acetaldehyde, and water, wherein the mass percentages of hydrogen bromide gas, acetaldehyde, and water are 47:0.5:52.5; the hydrobromic acid solution is prepared using the preparation apparatus of Example 1.

[0089] Example 21

[0090] A highly stable hydrobromic acid is composed of an aqueous solution of hydrogen bromide, formaldehyde, and water, wherein the mass percentages of hydrogen bromide gas, formaldehyde, and water are 30:30:40; the hydrobromic acid solution is prepared using the preparation apparatus of Example 1.

[0091] Example 22

[0092] A highly stable hydrobromic acid is composed of an aqueous solution of hydrogen bromide, formic acid, and water, wherein the mass percentages of hydrogen bromide gas, formic acid, and water are 25:25:50; the hydrobromic acid solution is prepared using the preparation apparatus of Example 1.

[0093] In Examples 16-20, the hydrogen bromide aqueous solution contained 55% hydrogen bromide; in Example 21, the hydrogen bromide aqueous solution contained 48% hydrogen bromide; and in Example 22, the hydrogen bromide aqueous solution contained 60% hydrogen bromide.

[0094] The hydrobromic acid obtained in Examples 2-22 was of consistent quality and had a high degree of color consistency.

[0095] Although the present invention has been described in detail with reference to preferred embodiments, it is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and essence of the invention, and such modifications or substitutions should all be within the scope of the present invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should also be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope of the claims.

Claims

1. A highly stable hydrobromic acid, characterized in that, This hydrobromic acid includes: (I) A homogeneous liquid composed of hydrogen bromide gas and a conditioning agent, wherein the mass percentage of hydrogen bromide gas to conditioning agent is 10~35:65~90; or (II) A homogeneous liquid composed of aqueous solution or gaseous hydrogen bromide, a conditioning agent and water; wherein the mass percentage of aqueous solution or gaseous hydrogen bromide, a conditioning agent and water is 20~47:0.5~65:1.0~79.5; The formulation agent is at least one of oxalic acid, ascorbic acid, hydrazine hydrate, acetaldehyde, formaldehyde, formic acid, and glacial acetic acid. Highly stable hydrobromic acid is obtained by uniformly mixing hydrogen bromide gas and a mixing agent using a mixing device, or by uniformly mixing hydrogen bromide aqueous solution, hydrogen bromide gas, a mixing agent, and water. The aqueous solution of hydrogen bromide contains 48-60% hydrogen bromide; the hydrogen bromide gas is high-purity hydrogen bromide gas or a mixture of hydrogen bromide and hydrogen, wherein the hydrogen bromide content is 80-99.8%. The preparation device for the above-mentioned highly stable hydrobromic acid includes a container, a pump, a buffer tank, and a waste gas absorber. The container is equipped with a weighing module, a discharge port, and an air inlet at the bottom, and a feed inlet and a gas outlet at the top. The pump has two inlets, one connected to the outlet and the other to the liquid storage tank; the pump also has two outlets, one connected to the inlet and the other to the transport tank. The gas port is connected to a breather valve; the breather valve is connected to an inert gas pipe and an exhaust pipe, the exhaust pipe is connected to an exhaust gas absorber, and the exhaust gas absorber is connected to a buffer tank. A self-regulating valve is installed on the inert gas pipe.

2. The highly stable hydrobromic acid as described in claim 1, characterized in that, The container is equipped with legs at the bottom, and the weighing module is mounted on the legs.

3. The highly stable hydrobromic acid as described in claim 1, characterized in that, A balance port is also provided at the top of the container, which is connected to a balance pipe, which is connected to a buffer tank; a level gauge is installed on the side of the container.

4. The highly stable hydrobromic acid as described in claim 1, characterized in that, A sampling pipe is installed on the connecting pipeline between the discharge port and the pump, and valve A is installed on the sampling pipe.

5. The highly stable hydrobromic acid as described in claim 1, characterized in that, Valve B is installed on the connecting pipeline between the pump and the liquid storage tank, and valve C is installed on the connecting pipeline between the pump and the discharge port. Valve B and valve C are connected in parallel. Valve D is installed on the connecting pipeline between the pump and the transport tank, and valve E is installed on the connecting pipeline between the pump and the inlet. Valve D and valve E are connected in parallel.

6. The highly stable hydrobromic acid as described in claim 1, characterized in that, The waste gas absorber is equipped with an absorbent liquid inlet and an exhaust port.

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