Solid composite bactericidal scale inhibitor

Abstract

The invention belongs to the field of scale inhibitors, particularly relates to a solid composite bactericidal scale inhibitor, and provides the following scheme aiming at the problems of uncontrollable release speed and poor performance of the existing scale inhibitor: the solid composite bactericidal scale inhibitor comprises the following raw materials in parts by weight: 30-50 parts of a slow-release scale inhibitor, 10-20 parts of a structural adhesive and 1-10 parts of a bactericidal complexing agent; the bactericidal complexing agent comprises benzalkonium bromide and benzoic acid; by adjusting the ratio of the slow-release scale inhibitor to the structural adhesive, the composite slow-release solid scale inhibitor with controllable release speed can be prepared, and meanwhile, the bactericidal complexing agent is added, so that the bactericidal effect can be improved, and the use performance is further improved.

Description

Technical Field

[0001] The present invention relates to the field of scale inhibitors, and particularly to a solid composite bactericidal scale inhibitor. Background Art

[0002] Scale inhibitor: It is a type of chemical agent that can disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on the metal surface, and maintain good heat transfer efficiency of metal equipment. Scale inhibitors can remove scale and prevent the formation of scale, improve heat exchange efficiency, reduce power consumption or fuel consumption; water treatment can also reduce sewage discharge, improve water utilization rate, generally saving more than 60%, which is in line with China's new policy of energy conservation and emission reduction.

[0003] The release rate of the existing scale inhibitors is uncontrollable and their performance is poor. Therefore, we propose a solid composite bactericidal scale inhibitor to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the prior art that the release rate of scale inhibitors is uncontrollable and their performance is poor, and to propose a solid composite bactericidal scale inhibitor.

[0005] A solid composite bactericidal scale inhibitor proposed by the present invention comprises the following raw materials in parts by weight: 30 - 50 parts of a slow-release scale inhibitor, 10 - 20 parts of a structural adhesive, and 1 - 10 parts of a bactericidal composite.

[0006] The bactericidal composite includes benzalkonium bromide and benzoic acid.

[0007] The structural adhesive is a polycondensation product of epichlorohydrin and bisphenol A or polyol. Due to the chemical activity of the epoxy group, it can be ring-opened by various compounds containing active hydrogen, and cured and crosslinked to form a network structure. The network structure can slow down the dissolution of the slow-release scale inhibitor, thereby achieving the purpose of controllable release rate.

[0008] Preferably, it comprises the following raw materials in parts by weight: 32 - 48 parts of a slow-release scale inhibitor, 11 - 19 parts of a structural adhesive, and 2 - 9 parts of a bactericidal composite.

[0009] Preferably, it comprises the following raw materials in parts by weight: 35 - 45 parts of a slow-release scale inhibitor, 12 - 18 parts of a structural adhesive, and 3 - 8 parts of a bactericidal composite.

[0010] Preferably, it comprises the following raw materials in parts by weight: 40 parts of a slow-release scale inhibitor, 15 parts of a structural adhesive, and 5 parts of a bactericidal composite.

[0011] Preferably, the ratio of benzalkonium bromide to benzoic acid is 6:4.

[0012] Preferably, its preparation method comprises the following steps:

[0013] S1. Mix the materials of the bactericidal composite agent evenly to obtain a composite additive;

[0014] S2. Mix the composite additive and the slow-release scale inhibitor evenly to obtain a mixture;

[0015] S3. Add structural glue to the mixture and mix evenly, then extrude and form;

[0016] S4. Heat-treat the extruded product to obtain a solid composite bactericidal and scale-inhibiting agent.

[0017] Preferably, in S1, the preparation method of the bactericidal composite agent is as follows: Put benzalkonium bromide and benzoic acid into a mixing container in proportion, stir and mix evenly, and the stirring speed is 300 - 400 r / min.

[0018] Preferably, in S1, mix the materials of the bactericidal composite agent evenly to obtain a composite additive, and the stirring speed is 400 - 500 r / min.

[0019] Preferably, in S1, the mixing time is 30 - 60 min.

[0020] Preferably, in S2, mix the composite additive and the slow-release scale inhibitor evenly, the stirring speed is 400 - 500 r / min, and the mixing time is 40 - 60 min to obtain a mixture.

[0021] Benzalkonium bromide is an organic compound with the chemical formula C21H38BrN. It is a colorless or light yellow solid or colloid, slightly soluble in ethanol, and is mainly used as a disinfection and antiseptic drug, mainly for skin, mucosa, wounds, surface of articles and indoor environment disinfection;

[0022] Benzoic acid is an aromatic carboxylic acid organic compound and also the simplest aromatic acid, with the chemical formula C7H6O2. It was originally prepared from benzoin gum, so it is called benzoic acid. The melting point is 122.13 °C, the boiling point is 249.2 °C, and the relative density (15 / 4 °C) is 1.2659. The appearance is white needle-like or scaly crystals. It will sublime above 100 °C. Slightly soluble in cold water and hexane, soluble in hot water, ethanol, ether, chloroform, benzene, carbon disulfide and turpentine, etc.

[0023] Benzoic acid exists widely in nature in the form of free acid, ester or its derivatives. It is mainly used for preparing sodium benzoate preservative, and is also used in the synthesis of drugs, dyes, and is also used in the manufacture of plasticizers, mordants, bactericides and spices, etc. It can be directly oxidized from toluene in the presence of manganese dioxide, or prepared by decarboxylating phthalic anhydride with steam;

[0024] The beneficial effects of the present invention are:

[0025] By adjusting the ratio of the slow-release scale inhibitor to the structural adhesive, the present invention can prepare a composite slow-release solid scale inhibitor with a controllable release rate. At the same time, adding a bactericidal composite agent can improve the bactericidal effect and thus enhance the service performance. Detailed implementation manners

[0026] The present invention will be further illustrated below in conjunction with specific embodiments.

[0027] Example 1

[0028] The present invention provides a solid composite bactericidal and scale inhibitor, which comprises the following raw materials in parts by weight: 30 parts of slow-release scale inhibitor, 10 parts of structural adhesive, and 1 part of bactericidal composite agent.

[0029] The bactericidal composite agent includes benzalkonium bromide and benzoic acid.

[0030] The slow-release scale inhibitor is obtained by reacting a mixed acid with calcium hydroxide, and the mixed acid includes a polycarboxylic acid copolymer and citric acid.

[0031] In this example, the ratio of benzalkonium bromide to benzoic acid is 6:4.

[0032] In this example, its preparation method includes the following steps:

[0033] S1. Mix the materials of the bactericidal composite agent evenly to obtain a composite additive.

[0034] S2. Mix the composite additive with the slow-release scale inhibitor evenly to obtain a mixture.

[0035] S3. Add the structural adhesive to the mixture and mix evenly, then extrude into a shape.

[0036] S4. Heat-treat the extruded product to obtain the solid composite bactericidal and scale inhibitor.

[0037] In this example, in S1, the preparation method of the bactericidal composite agent is as follows: Put benzalkonium bromide and benzoic acid into a mixing container according to the ratio, stir and mix evenly, and the stirring speed is 300 r / min.

[0038] In this example, in S1, mix the materials of the bactericidal composite agent evenly to obtain a composite additive, and the stirring speed is 400 r / min.

[0039] In this example, in S1, the mixing time is 30 min.

[0040] In this example, in S2, mix the composite additive with the slow-release scale inhibitor evenly, the stirring speed is 400 r / min, and the mixing time is 40 min to obtain a mixture.

[0041] Example 2

[0042] The present invention provides a solid composite bactericidal and scale inhibitor, which comprises the following raw materials in parts by weight: 35 parts of a slow-release scale inhibitor, 12 parts of a structural adhesive, and 2 parts of a bactericidal composite agent;

[0043] The bactericidal composite agent comprises benzalkonium bromide and benzoic acid.

[0044] In this embodiment, the ratio of benzalkonium bromide to benzoic acid is 6:4.

[0045] In this embodiment, its preparation method comprises the following steps:

[0046] S1. Mix the materials of the bactericidal composite agent evenly to obtain a composite additive;

[0047] S2. Mix the composite additive with the slow-release scale inhibitor evenly to obtain a mixture;

[0048] S3. Add the structural adhesive to the mixture and mix evenly, then extrude into a shape;

[0049] S4. Perform heat treatment on the extruded product to obtain the solid composite bactericidal and scale inhibitor.

[0050] In this embodiment, in S1, the preparation method of the bactericidal composite agent is as follows: Put benzalkonium bromide and benzoic acid into a mixing container according to the ratio, stir and mix evenly, and the stirring speed is 320 r / min.

[0051] In this embodiment, in S1, mix the materials of the bactericidal composite agent evenly to obtain a composite additive, and the stirring speed is 420 r / min.

[0052] In this embodiment, in S1, the mixing time is 35 min.

[0053] In this embodiment, in S2, mix the composite additive with the slow-release scale inhibitor evenly, the stirring speed is 420 r / min, and the mixing time is 45 min to obtain a mixture.

[0054] Example 3

[0055] The present invention provides a solid composite bactericidal and scale inhibitor, which comprises the following raw materials in parts by weight: 40 parts of a slow-release scale inhibitor, 15 parts of a structural adhesive, and 5 parts of a bactericidal composite agent;

[0056] The bactericidal composite agent comprises benzalkonium bromide and benzoic acid.

[0057] In this embodiment, the ratio of benzalkonium bromide to benzoic acid is 6:4.

[0058] In this embodiment, its preparation method comprises the following steps:

[0059] S1. Mix the materials of the bactericidal composite agent evenly to obtain a composite additive;

[0060] S2. Mix the composite additive and the slow-release scale inhibitor evenly to obtain a mixture.

[0061] S3. Add structural adhesive to the mixture and mix evenly, then extrude into shape.

[0062] S4. Perform heat treatment on the extruded product to obtain the solid composite bactericidal and scale inhibitor.

[0063] In this embodiment, in S1, the preparation method of the bactericidal composite agent is as follows: Put benzalkonium bromide and benzoic acid into the mixing container according to the proportion, stir and mix evenly, and the stirring speed is 350 r / min.

[0064] In this embodiment, in S1, mix the materials of the bactericidal composite agent evenly to obtain the composite additive, and the stirring speed is 450 r / min.

[0065] In this embodiment, in S1, the mixing time is 45 min.

[0066] In this embodiment, in S2, mix the composite additive and the slow-release scale inhibitor evenly, with a stirring speed of 450 r / min and a mixing time of 50 min to obtain a mixture.

[0067] Example 4

[0068] The present invention provides a solid composite bactericidal and scale inhibitor, which comprises the following raw materials in parts by weight: 45 parts of slow-release scale inhibitor, 18 parts of structural adhesive, and 7 parts of bactericidal composite agent.

[0069] The bactericidal composite agent includes benzalkonium bromide and benzoic acid.

[0070] In this embodiment, the ratio of benzalkonium bromide to benzoic acid is 6:4.

[0071] In this embodiment, its preparation method includes the following steps:

[0072] S1. Mix the materials of the bactericidal composite agent evenly to obtain the composite additive.

[0073] S2. Mix the composite additive and the slow-release scale inhibitor evenly to obtain a mixture.

[0074] S3. Add structural adhesive to the mixture and mix evenly, then extrude into shape.

[0075] S4. Perform heat treatment on the extruded product to obtain the solid composite bactericidal and scale inhibitor.

[0076] In this embodiment, in S1, the preparation method of the bactericidal composite agent is as follows: Put benzalkonium bromide and benzoic acid into the mixing container according to the proportion, stir and mix evenly, and the stirring speed is 380 r / min.

[0077] In this embodiment, in S1, the materials of the bactericidal composite agent are mixed evenly to obtain a composite additive, and the stirring speed is 480 r / min.

[0078] In this embodiment, in S1, the mixing time is 55 min.

[0079] In this embodiment, in S2, the composite additive and the slow-release scale inhibitor are mixed evenly, the stirring speed is 480 r / min, and the mixing time is 55 min to obtain a mixture.

[0080] Example Five

[0081] The present invention provides a solid composite bactericidal and scale inhibitor, comprising the following raw materials in parts by weight: 50 parts of slow-release scale inhibitor, 20 parts of structural adhesive, and 10 parts of bactericidal composite agent;

[0082] The bactericidal composite agent includes benzalkonium bromide and benzoic acid.

[0083] In this embodiment, the ratio of benzalkonium bromide to benzoic acid is 6:4.

[0084] In this embodiment, its preparation method includes the following steps:

[0085] S1. Mix the materials of the bactericidal composite agent evenly to obtain a composite additive;

[0086] S2. Mix the composite additive and the slow-release scale inhibitor evenly to obtain a mixture;

[0087] S3. Add the structural adhesive to the mixture and mix evenly, then extrude and form;

[0088] S4. Heat-treat the extruded product to obtain a solid composite bactericidal and scale inhibitor.

[0089] In this embodiment, in S1, the preparation method of the bactericidal composite agent is as follows: Put benzalkonium bromide and benzoic acid into the mixing container according to the ratio, stir and mix evenly, and the stirring speed is 400 r / min.

[0090] In this embodiment, in S1, the materials of the bactericidal composite agent are mixed evenly to obtain a composite additive, and the stirring speed is 500 r / min.

[0091] In this embodiment, in S1, the mixing time is 60 min.

[0092] In this embodiment, in S2, the composite additive and the slow-release scale inhibitor are mixed evenly, the stirring speed is 500 r / min, and the mixing time is 60 min to obtain a mixture.

[0093] For the solid composite bactericidal and scale inhibitor prepared in Examples 1 to 5, during use, it is sprayed on the inner wall of the pipeline to form a protective film on the surface of the pipeline, so that corrosive ions will not corrode the pipeline. Compared with the conventional scale inhibitor, the experimental data are shown in the following table:

[0094] Table 1

[0095] Example Sustained-release detection standard Result One HG / T 5039-2011 Qualified Two HG / T 5039-2011 Qualified Three HG / T 5039-2011 Qualified Four HG / T 5039-2011 Qualified Five HG / T 5039-2011 Qualified

[0096] First, prepare the water efficiency spiked water according to GB34914-2017. After boiling it, scale (white floating matter) is visually observed to be generated. Then, the scale inhibition performance test is carried out in a four-stage ultrafiltration water purifier by adopting a ten-minute on-off test. Among them, the ten-minute on-off test means stopping for 10 minutes after water is supplied for 10 minutes, repeating the above operation, stopping the test every night, and taking the corresponding points to determine the total phosphorus content and conduct a boiling water test to observe whether scale appears. The results are as follows:

[0097] Table 2

[0098] Example Scaling phenomenon One None Two None Three None Four None Five None

[0099] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A solid composite bactericidal and scale inhibitor, characterized in that, it comprises the following raw materials in parts by weight: 30 - 50 parts of a slow-release scale inhibitor, 10 - 20 parts of a structural adhesive, and 1 - 10 parts of a bactericidal composite; The bactericidal composite comprises benzalkonium bromide and benzoic acid.

2. The solid composite bactericidal and scale inhibitor according to claim 1, characterized in that, it comprises the following raw materials in parts by weight: 32 - 48 parts of a slow-release scale inhibitor, 11 - 19 parts of a structural adhesive, and 2 - 9 parts of a bactericidal composite.

3. The solid composite bactericidal and scale inhibitor according to claim 1, characterized in that, it comprises the following raw materials in parts by weight: 35 - 45 parts of a slow-release scale inhibitor, 12 - 18 parts of a structural adhesive, and 3 - 8 parts of a bactericidal composite.

4. The solid composite bactericidal and scale inhibitor according to claim 1, characterized in that, it comprises the following raw materials in parts by weight: 40 parts of a slow-release scale inhibitor, 15 parts of a structural adhesive, and 5 parts of a bactericidal composite.

5. The solid composite bactericidal and scale inhibitor according to claim 1, characterized in that, the ratio of benzalkonium bromide to benzoic acid is 6:

4.

6. The solid composite bactericidal and scale inhibitor according to claim 1, characterized in that, its preparation method comprises the following steps: S1. Mix the materials of the bactericidal composite evenly to obtain a composite additive; S2. Mix the composite additive with the slow-release scale inhibitor evenly to obtain a mixture; S3. Add the structural adhesive to the mixture and mix evenly, then extrude into a shape; S4. Perform heat treatment on the extruded product to obtain the solid composite bactericidal and scale inhibitor.

7. The solid composite bactericidal and scale inhibitor according to claim 6, characterized in that, in S1, the preparation method of the bactericidal composite is as follows: Put benzalkonium bromide and benzoic acid into a mixing container according to the ratio, stir and mix evenly, and the stirring speed is 300 - 400 r / min.

8. The solid composite bactericidal and scale inhibitor according to claim 6, characterized in that, in S1, mix the materials of the bactericidal composite evenly to obtain a composite additive, and the stirring speed is 400 - 500 r / min.

9. The solid composite bactericidal and scale inhibitor according to claim 6, characterized in that, in S1, the mixing time is 30 - 60 min.

10. The solid composite bactericidal and scale inhibitor according to claim 6, characterized in that, in S2, mix the composite additive with the slow-release scale inhibitor evenly, the stirring speed is 400 - 500 r / min, and the mixing time is 40 - 60 min to obtain a mixture.