Alkyl glycoside decolorization device

Abstract

The utility model wants to solve the problem that the existing alkyl glycoside decoloring device has high risk of foam overflow, poor decoloring effect and low production efficiency, and the technical scheme is: alkyl glycoside decoloring device, the device includes original glycoside entrance (12), water entrance (13), liquid alkali entrance (24), hydrogen peroxide entrance (35), vacuum (53) and finished product outlet (41).

Description

Technical Field

[0001] This utility model relates to an alkyl glycoside decolorization device. Background Technology

[0002] Alkyl glycosides are environmentally friendly, mild, low-irritant, and readily biodegradable nonionic surfactants. They produce rich, fine foam, have strong emulsifying and wetting properties, high surface activity, do not gel when diluted, and possess strong detergency. They are resistant to strong acids, alkalis, and high-concentration electrolytes, and are widely used in personal care and household cleaning products such as baby bath washes, shampoos, hand soaps, facial cleansers, and facial cleansers. Due to their unique properties, they also have good applications in agricultural chemicals, fire protection, textile printing and dyeing, and industrial cleaning. Alkyl glycosides are produced by the dehydration condensation of anhydrous glucose and fatty alcohols under high temperature and high vacuum. Their raw materials are derived from natural green crops such as coconut, palm kernels, corn, and wheat, and the production process generates virtually no waste, aligning with the concept of green and environmentally friendly development. In recent years, with the increasing market penetration of green, environmentally friendly, mild, and low-irritant concepts, alkyl glycosides, as a nonionic surfactant, have gained significant popularity.

[0003] Currently, the production of alkyl glycosides is mainly divided into one-step and two-step methods. The two-step method, due to its complex process, strong odor, poor quality, and significant safety and environmental issues, is gradually being replaced by the one-step method, which offers a simpler process, superior quality, and is cleaner and more energy-efficient. The one-step method involves the direct dehydration condensation of glucose with fatty alcohols under high temperature and high vacuum conditions to produce alkyl glycosides. Glucose has very low solubility in long-chain fatty alcohols, and to prevent the self-polymerization of sugars, the amount of fatty alcohol added is often significantly excessive. Since long-chain alcohols have relatively high boiling points, they need to be removed under high temperature and high vacuum. During the de-alcoholization process, unreacted glucose and a small amount of alkyl glycosides are prone to caramelization and decomposition at high temperatures for extended periods, leading to a darker product color. Therefore, further bleaching and refining treatment is required.

[0004] According to relevant literature, the decolorization of alkyl glycosides is mainly divided into physical decolorization and chemical decolorization. Physical decolorization mainly relies on activated carbon, diatomaceous earth, etc. to adsorb the coloring substances. Although it can achieve a certain decolorization and deodorization effect, it is still difficult to meet market demand. In terms of chemical decolorization, hydrogen peroxide decomposes into water and oxygen without toxic residues and is green and environmentally friendly, so it has become the first choice for chemical decolorization. At present, most companies on the market use hydrogen peroxide as a decolorizing agent, and the main method is intermittent static decolorization process, that is, adding hydrogen peroxide in batches, stirring evenly, and then letting it stand for decolorization. However, there are problems such as excessive foaming and easy boiling, long defoaming time and difficulty in quickly replenishing hydrogen peroxide, difficulty in evenly adding hydrogen peroxide to the foam surface, resulting in a decrease in bleaching effect, large fluctuations in product color during the testing process, long bleaching time, and low production efficiency. Utility Model Content

[0005] The present invention addresses the problems of high risk of foam overflow, poor decolorization effect, and low production efficiency in existing alkyl glycoside decolorization devices. It provides a new alkyl glycoside decolorization device that overcomes the risk of foam overflow, significantly improves the decolorization effect, and greatly increases production efficiency.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] An alkyl glycoside decolorization device, the device comprising a raw glycoside inlet 12, a water inlet 13, a liquid alkali inlet 24, a hydrogen peroxide inlet 35, a vacuum port 53, and a finished product outlet 41.

[0008] The presence of vacuum port 53 allows decolorization to proceed under negative pressure, overcoming the risk of foam overflow from the decolorization container that is prone to occur in atmospheric pressure decolorization kettles. It also avoids the disadvantage of having to wait for the foam height to drop to a certain level before continuing to feed material in atmospheric pressure decolorization kettles, thus improving the efficiency of alkyl glycoside decolorization production.

[0009] In the above technical solution, it is preferable to set the original glycoside inlet 12 with an original glycoside inlet valve 12v.

[0010] In the above technical solution, it is preferable to install a water inlet valve 13v on the water inlet 13.

[0011] In the above technical solution, it is preferable to install a liquid alkali inlet valve 24v at the liquid alkali inlet 24.

[0012] In the above technical solution, it is preferable to install a hydrogen peroxide inlet valve 35v at the hydrogen peroxide inlet 35.

[0013] In the above technical solution, it is preferable to install a vacuum port valve on the vacuum port 53.

[0014] In the above technical solution, it is preferable to install a finished product outlet valve 41v at the finished product outlet 41.

[0015] In the above technical solution, the preferred device includes a glycoside mixing tank 10 and a decolorizer 50; the original glycoside inlet 12 and the water inlet 13 are located in the glycoside mixing tank 10; the glycoside mixing tank outlet 17 is fed into the top of the decolorizer 50 through the transfer channel 54.

[0016] In the above technical solution, it is preferable to install a transfer pump 70 in the transfer channel 54.

[0017] In the above technical solution, it is preferable to provide a transfer channel valve 54v in the transfer channel 54.

[0018] In the above technical solution, the preferred material transfer channel valve 54v is located downstream of the material transfer pump 70.

[0019] In the above technical solution, the vacuum port 53 is preferably located at the top of the decolorizer 50.

[0020] In the above technical solution, the liquid alkali inlet 24 and the hydrogen peroxide inlet 35 can be independently and optionally set at the top of the decolorizer 50 and / or the transfer channel 54.

[0021] In the above technical solution, the preferred embodiment of the device is to provide a material circulation channel that takes out the material from the bottom of the decolorizer 50 and returns the material to the top of the decolorizer 50.

[0022] In the above technical solution, a circulating pump 60 is preferably installed in the material circulation channel.

[0023] In the above technical solution, it is preferable to set a circulation channel valve 61v in the circulation channel, and the circulation channel valve 61v is located downstream of the circulation pump 60.

[0024] In the above technical solution, the preferred position for taking out the material from the bottom of the decolorizer 50 is the decolorizer outlet 55.

[0025] In the above technical solution, it is preferable to set a decolorizer discharge valve 55v at the decolorizer discharge port 55.

[0026] The circulation channel allows the alkyl glycoside decolorization process to proceed dynamically and continuously, overcoming the static and intermittent nature of existing alkyl glycoside decolorization processes and improving decolorization efficiency and productivity.

[0027] In the above technical solution, the preferred circulation channel includes a front section and a rear section; the front section of the circulation channel starts from the bottom of the decolorizer 50 where the material is taken out and ends at the junction with the transfer channel 54; the rear section of the circulation channel starts from the junction and is input into the decolorizer via the transfer channel 54.

[0028] In the above technical solution, the circulating pump 60 and the circulating channel valve 61v are preferably located in the front section of the circulating channel, and the circulating channel valve 61v is located downstream of the circulating pump 60.

[0029] In the above technical solution, it is preferred that the circulation channel is provided with a circulation branch 62, the circulation branch including a front section and a rear section; the front section of the circulation branch starts between the circulation pump 60 and the circulation channel valve 61v and ends at the point where it merges with the transfer channel 54; the rear section of the circulation branch starts from the point where it merges and is input to the decolorizer by using the transfer channel 54.

[0030] In the above technical solution, it is preferable to install a circulation branch valve 62V at the front end of the circulation branch.

[0031] In the above technical solution, the preferred location for the convergence of the circulation channel and the transfer channel 54 is downstream of the transfer pump 70, and the location for the merging of the circulation branch 62 and the transfer channel 54 is upstream of the transfer pump 70.

[0032] In the above technical solution, the liquid alkali inlet 24 and hydrogen peroxide inlet 35 are preferably located downstream of the junction of the circulation branch 62 and the transfer channel 54, and upstream of the transfer pump 70. This design allows for the initial mixing of liquid alkali and hydrogen peroxide with the material from the circulation branch before the transfer pump, with further mixing occurring at the transfer pump 70. A higher degree of mixing is more beneficial to the decolorization reaction.

[0033] In the above technical solution, the finished product outlet 41 is preferably located in the material circulation channel.

[0034] In the above technical solution, when the circulation channel includes a front section and a rear section, it is further preferred that the finished product outlet 41 is located in the front section of the circulation channel; when the circulation pump 60 and the circulation channel valve 61v are located in the front section of the circulation channel, it is more preferable that the finished product outlet 41 is located between the circulation pump 60 and the circulation channel valve 61v. The finished product outlet 41 is located in the front section of the circulation channel, or the finished product outlet 41 is located in the front section of the circulation branch, when the following conditions are met: the circulation channel is provided with a circulation branch 62, the circulation branch includes a front section and a rear section; the front section of the circulation branch starts between the circulation pump 60 and the circulation channel valve 61v and ends at the point where it merges with the transfer channel 54; the rear section of the circulation branch starts from this point and inputs into the decolorizer via the transfer channel 54; preferably, the front section of the circulation branch is provided with a circulation branch valve 62v.

[0035] Compared with the finished product outlet 41 being located in the transfer channel, or in the later section of the circulation channel, or in the later section of the circulation branch, the finished product outlet 41 being located in the earlier section of the circulation channel or the earlier section of the circulation branch is more conducive to reducing the residue of hydrogen peroxide in the finished product and reducing the color of the finished product.

[0036] In the above technical solution, the decolorizer 50 is preferably equipped with a material mixing component.

[0037] In the above technical solution, the preferred material mixing component is the slinger 52.

[0038] In the above technical solution, preferably, the opening for feeding material into the decolorizer 50 is partially or entirely oriented towards the upper surface of the swivel disc 52. For example, but not limited to, the opening for feeding material into the decolorizer 50 includes:

[0039] The material transfer channel 54 enters the inlet of the decolorizer 50;

[0040] Liquid alkali inlet 24 is located at the top of decolorizer 50;

[0041] The hydrogen peroxide inlet 35 is located at the top of the decolorizer 50.

[0042] In the above technical solution, the preferred device includes a finished product tank 40 and a finished product outlet 41 that enters the inlet of the finished product tank 40.

[0043] In the above technical solution, the preferred device includes a liquid alkali storage tank 20, and the outlet of the liquid alkali storage tank 20 is connected to the material feeding end of the liquid alkali inlet 24.

[0044] In the above technical solution, the preferred device includes a hydrogen peroxide storage tank 30 with its outlet connected to a hydrogen peroxide inlet 35 for material intake.

[0045] The alcohols used to produce alkyl glycosides are typically fatty alcohols with 6 to 18 carbon atoms, such as, but not limited to, at least one selected from the group consisting of C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17, and C18 fatty alcohols. Different fatty alcohols yield different types of alkyl glycosides. For example, but not limited to, using hexanol to obtain n-hexylalkyl glycoside (APG06), using isooctanol to obtain isooctylalkyl glycoside (APG08), using a mixture of n-octanol and n-decanol to obtain n-octyl-n-decyl mixed alkyl glycoside (APG0810), using a mixture of n-dodecyl and n-tetradecyl alcohol to obtain n-dodecyl-n-tetradecyl mixed alkyl glycoside (APG1214), using a mixture of n-hexadecyl and n-octadecyl alcohol to obtain n-hexadecyl-n-octadecyl mixed alkyl glycoside (APG1618), etc. Alkyl glycosides that can be decolorized using the apparatus of this invention include, but are not limited to, the above-mentioned alkyl glycosides, and all can achieve comparable decolorization effects. For comparison only, the embodiments in the specific implementation of this invention all use APG0810.

[0046] The color of the finished product shall be measured in accordance with the provisions of Section 5.2 of GB / T 19464-2014 "Alkyl glycosides".

[0047] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the first embodiment of the present invention;

[0049] Figure 2 This is a schematic diagram of the second embodiment of the present invention;

[0050] Figure 3 This is a schematic diagram of the third embodiment of the present invention;

[0051] Figure 4 This is a schematic diagram of an existing decolorization device.

[0052] Figures 1-4 middle:

[0053] 1 is a decolorization kettle;

[0054] 2 and 12 are the original glycoside inlets;

[0055] 3 and 13 are water inlets;

[0056] 4 and 24 are the liquid alkali inlets;

[0057] 5 and 35 are the hydrogen peroxide inlets;

[0058] 6 and 16 are stirring devices;

[0059] 7 is the outlet of the decolorization kettle.

[0060] 10 is a glycoside preparation vessel;

[0061] 12V is the original glycoside inlet valve;

[0062] 13V is the water inlet valve;

[0063] 17 is the outlet of the glycoside preparation reactor;

[0064] 17V glycoside mixing kettle outlet valve;

[0065] 20 is a liquid alkali storage tank;

[0066] 24V is the inlet valve for liquid alkali;

[0067] 30 is a hydrogen peroxide storage tank;

[0068] 35V is the hydrogen peroxide inlet valve;

[0069] 40 is a finished glycoside container;

[0070] 41 represents finished product exports;

[0071] 41V is the finished product outlet valve;

[0072] 50 is a decolorizer;

[0073] 51 is an insulation jacket;

[0074] 52 is a sell order;

[0075] 53 is the vacuum port;

[0076] 54 is the material transfer channel;

[0077] 54V is the material transfer channel valve;

[0078] 55 is the discharge port of the decolorizer;

[0079] 55V is the discharge valve of the decolorizer;

[0080] 60 is a circulating pump;

[0081] 61V is the circulation channel valve;

[0082] 62 is a cyclic branch;

[0083] 62V is the circulation branch valve;

[0084] 70 is a transfer pump. Detailed Implementation

[0085] In the specific implementation, the original glycoside is a pure alkyl glycoside obtained by scraper evaporation and de-alcoholization in the glycoside production device; the liquid alkali is an aqueous solution of sodium hydroxide with a weight content of 32%; and the hydrogen peroxide has a weight concentration of 27%.

[0086] 1. First implementation method

[0087] 1.1 Technical Solution of the First Implementation Method

[0088] See Figure 1 .

[0089] An alkyl glycoside decolorization device, the device comprising a raw glycoside inlet 12, a water inlet 13, a liquid alkali inlet 24, a hydrogen peroxide inlet 35, a vacuum port 53, and a finished product outlet 41.

[0090] The original glycoside inlet 12 is equipped with an original glycoside inlet valve 12v.

[0091] Water inlet 13 is equipped with water inlet valve 13v.

[0092] A liquid alkali inlet valve 24v is installed at the liquid alkali inlet 24.

[0093] A hydrogen peroxide inlet valve 35V is installed at the hydrogen peroxide inlet 35.

[0094] A vacuum port valve is installed at vacuum port 53.

[0095] Finished product outlet 41 is equipped with finished product outlet valve 41v.

[0096] The device includes a glycoside mixing tank 10 and a decolorizer 50; the original glycoside inlet 12 and the water inlet 13 are located in the glycoside mixing tank 10; the glycoside mixing tank outlet 17 is fed into the top of the decolorizer 50 through the transfer channel 54.

[0097] The material transfer channel 54 is equipped with a material transfer pump 70.

[0098] The transfer channel 54 is equipped with a transfer channel valve 54v.

[0099] The transfer channel valve 54v is located downstream of the transfer pump 70.

[0100] Vacuum port 53 is located at the top of decolorizer 50.

[0101] The liquid alkali inlet 24 and the hydrogen peroxide inlet 35 are located at the top of the decolorizer 50.

[0102] The device is provided with a material circulation channel that takes out material from the bottom of the decolorizer 50 and returns material to the top of the decolorizer 50. The material circulation channel is equipped with a circulation pump 60 and a circulation channel valve 61v, which is located downstream of the circulation pump 60.

[0103] The position where the material is taken out from the bottom of the decolorizer 50 is the decolorizer outlet 55, and the decolorizer outlet 55 is equipped with a decolorizer outlet valve 55v.

[0104] The circulation channel includes a front section and a rear section; the front section starts from the bottom of the decolorizer 50 where the material is taken out and ends at the junction with the transfer channel 54; the rear section starts from the junction and enters the decolorizer through the transfer channel 54.

[0105] The circulation pump 60 and the circulation channel valve 61v are located at the front of the circulation channel.

[0106] The junction of the circulation channel and the transfer channel 54 is located downstream of the transfer pump 70.

[0107] The finished product outlet 41 is located at the front of the circulation channel, specifically between the circulation pump 60 and the circulation channel valve 61v.

[0108] The decolorizer 50 is equipped with a material mixing component; the material mixing component is a spinning disc 52, and the openings for feeding material into the decolorizer 50 all face the upper surface of the spinning disc 52:

[0109] The material transfer channel 54 enters the inlet of the decolorizer 50, the liquid alkali inlet 24 and the hydrogen peroxide inlet 35.

[0110] The device includes a finished product tank 40 and a finished product outlet 41 that enters the inlet of the finished product tank 40.

[0111] The device includes a liquid alkali storage tank 20, the outlet of which is connected to the liquid alkali inlet 24 for material intake.

[0112] The device includes a hydrogen peroxide storage tank 30 with its outlet connected to a hydrogen peroxide inlet 35 for material intake.

[0113] 1.2, Example of the First Implementation Method

[0114] 1.2.1 Main Equipment Parameters

[0115] Glycoside mixing vessel 10: The main body is a vertical cylindrical structure with a diameter of DN2000 mm and a height of 2500 mm. Both the top and bottom are equipped with standard elliptical heads, and the vessel has an internal cooling coil and an external heating pipe. It is stirred by a paddle.

[0116] Decolorizer 50: The main body is a vertical cylindrical structure with a diameter of DN1500 mm and a height of 4000 mm. A rotating disc is installed at the upper 1 / 3 of the height of the main body, and the bottom adopts a conical design with a height of 1500 mm.

[0117] 1.2.2 Operational Status

[0118] Confirm that the outlet valve 17V of the glycoside preparation vessel is closed. Open the water inlet valve 13V and add 1800kg of pure water to the glycoside preparation vessel 10. Start stirring and heat to and maintain 75±5℃. Open the original glycoside inlet valve 12V and add 4200kg of original glycoside to the glycoside preparation vessel 10 to dissolve and obtain the glycoside preparation solution.

[0119] Close the water inlet valve 13V and the original glycoside inlet valve 12V. Open the vacuum port 53 to control the vacuum degree in the decolorizer between -0.08MPa and -0.095MPa. Turn on the swivel plate 52, open the glycoside preparation vessel outlet valve 17V and the transfer channel valve 54V, and turn on the transfer pump 70 to feed the glycoside preparation solution into the decolorizer 50 at a rate of 12000kg / h. At the same time as feeding the glycoside preparation solution, open the liquid alkali inlet valve 24V and the hydrogen peroxide inlet valve 35V. The liquid alkali flow rate is 240kg / h and the addition amount is 120kg. The hydrogen peroxide flow rate is 180kg / h and the addition amount is 90kg. When the material in the mixing tank is emptied, close the outlet valve 17V, liquid alkali inlet valve 24V, hydrogen peroxide inlet valve 35V, and transfer pump 70 of the glycoside mixing tank. Open the outlet valve 55V, circulation channel valve 61V, and circulation pump 60 of the decolorizer to circulate the material. Maintain the temperature inside the decolorizer 50 at 75±5℃ and the flow rate of circulation pump 60 at 12000kg / h for 6 hours.

[0120] Then, replenish the solution while maintaining continuous circulation: open the liquid alkali inlet valve 24V and the hydrogen peroxide inlet valve 35V, add 60kg of liquid alkali at a flow rate of 240kg / h, add 90kg of hydrogen peroxide at a flow rate of 180kg / h, close the liquid alkali inlet valve 24V and the hydrogen peroxide inlet valve 35V, and continue the circulation for 6 hours.

[0121] Then, close the vacuum port 53. After venting, sequentially open the finished product outlet valve 41v and close the circulation channel valve 61v, transferring the material to the finished product reactor via the circulation pump 60. Samples of the alkyl glycoside finished product were taken for testing; the color was 35 Hazen.

[0122] 2. Second implementation method

[0123] 2.1 Technical Solution of the Second Implementation Method

[0124] See Figure 2 .

[0125] An alkyl glycoside decolorization device, the device comprising a raw glycoside inlet 12, a water inlet 13, a liquid alkali inlet 24, a hydrogen peroxide inlet 35, a vacuum port 53, and a finished product outlet 41.

[0126] The original glycoside inlet 12 is equipped with an original glycoside inlet valve 12v.

[0127] Water inlet 13 is equipped with water inlet valve 13v.

[0128] A liquid alkali inlet valve 24v is installed at the liquid alkali inlet 24.

[0129] A hydrogen peroxide inlet valve 35V is installed at the hydrogen peroxide inlet 35.

[0130] A vacuum port valve is installed at vacuum port 53.

[0131] Finished product outlet 41 is equipped with finished product outlet valve 41v.

[0132] The device includes a glycoside mixing tank 10 and a decolorizer 50; the original glycoside inlet 12 and the water inlet 13 are located in the glycoside mixing tank 10; the glycoside mixing tank outlet 17 is fed into the top of the decolorizer 50 through the transfer channel 54.

[0133] The material transfer channel 54 is equipped with a material transfer pump 70.

[0134] The transfer channel 54 is equipped with a transfer channel valve 54v.

[0135] The transfer channel valve 54v is located downstream of the transfer pump 70.

[0136] Vacuum port 53 is located at the top of decolorizer 50.

[0137] The liquid alkali inlet 24 and the hydrogen peroxide inlet 35 are located in the material transfer channel 54.

[0138] The device is provided with a material circulation channel that takes out material from the bottom of the decolorizer 50 and returns material to the top of the decolorizer 50. The material circulation channel is equipped with a circulation pump 60 and a circulation channel valve 61v, which is located downstream of the circulation pump 60.

[0139] The position where the material is taken out from the bottom of the decolorizer 50 is the decolorizer outlet 55, and the decolorizer outlet 55 is equipped with a decolorizer outlet valve 55v.

[0140] The circulation channel includes a front section and a rear section; the front section starts from the bottom of the decolorizer 50 where the material is taken out and ends at the junction with the transfer channel 54; the rear section starts from the junction and enters the decolorizer through the transfer channel 54.

[0141] The circulation pump 60 and the circulation channel valve 61v are located at the front of the circulation channel, and the circulation channel valve 61v is located downstream of the circulation pump 60.

[0142] The circulation channel is provided with a circulation branch 62, which includes a front section and a rear section. The front section of the circulation branch starts between the circulation pump 60 and the circulation channel valve 61v and ends at the point where it merges with the transfer channel 54. The rear section of the circulation branch starts from the point where it merges and is input to the decolorizer via the transfer channel 54.

[0143] A 62V circulation branch valve is installed at the front end of the circulation branch.

[0144] The junction of the circulation channel and the transfer channel 54 is located downstream of the transfer pump 70, and the junction of the circulation branch 62 and the transfer channel 54 is located upstream of the transfer pump 70.

[0145] The liquid alkali inlet 24 and hydrogen peroxide inlet 35 are located downstream of the junction of the circulation branch 62 and the transfer channel 54, and upstream of the transfer pump 70.

[0146] The finished product outlet 41 is located in the material circulation channel.

[0147] The circulation channel includes a front section and a rear section, with the finished product outlet 41 located in the front section; the circulation pump 60 and the circulation channel valve 61v are located in the front section, with the finished product outlet 41 located between the circulation pump 60 and the circulation channel valve 61v.

[0148] The decolorizer 50 is equipped with a material mixing component; the material mixing component is a swivel disc 52, and the material transfer channel 54 enters the decolorizer 50 through an inlet facing the upper surface of the swivel disc 52.

[0149] The device includes a finished product tank 40 and a finished product outlet 41 that enters the inlet of the finished product tank 40.

[0150] The device includes a liquid alkali storage tank 20, the outlet of which is connected to the liquid alkali inlet 24 for material intake.

[0151] The device includes a hydrogen peroxide storage tank 30 with its outlet connected to a hydrogen peroxide inlet 35 for material intake.

[0152] 2.2, Example of the second implementation method

[0153] 2.2.1 Main Equipment Parameters

[0154] Same as 1.2.1.

[0155] 2.2.2 Operational Status

[0156] Confirm that the outlet valve 17V of the glycoside preparation vessel is closed. Open the water inlet valve 13V and add 1800kg of pure water to the glycoside preparation vessel 10. Start stirring and heat to and maintain 75±5℃. Open the original glycoside inlet valve 12V and add 4200kg of original glycoside to the glycoside preparation vessel 10 to dissolve and obtain the glycoside preparation solution.

[0157] Close the water inlet valve 13V and the original glycoside inlet valve 12V. Open the vacuum port 53 to control the vacuum degree in the decolorizer between -0.08MPa and -0.095MPa. Turn on the swivel plate 52, open the glycoside preparation vessel outlet valve 17V and the transfer channel valve 54V, and turn on the transfer pump 70 to feed the glycoside preparation solution into the decolorizer 50 at a rate of 12000kg / h. At the same time as feeding the glycoside preparation solution, open the liquid alkali inlet valve 24V and the hydrogen peroxide inlet valve 35V. The liquid alkali flow rate is 240kg / h and the addition amount is 120kg. The hydrogen peroxide flow rate is 180kg / h and the addition amount is 90kg. Once the material in the mixing tank is empty, close the outlet valve 17V, liquid alkali inlet valve 24V, hydrogen peroxide inlet valve 35V, and transfer pump 70 of the glycoside mixing tank. Open the outlet valve 55V, circulation channel valve 61V, and circulation pump 60 of the decolorizer to circulate the material. Maintain the temperature inside the decolorizer 50 at 75±5℃ and the flow rate of circulation pump 60 at 12000kg / h for 6 hours.

[0158] Then, replenish the solution while maintaining continuous circulation: sequentially open the circulation branch valve 62V, open the transfer pump 70, close the circulation channel valve 61V, then open the liquid alkali inlet valve 24V and the hydrogen peroxide inlet valve 35V, with the liquid alkali flow rate at 240kg / h and the addition amount at 60kg, and the hydrogen peroxide flow rate at 180kg / h and the addition amount at 90kg. Then, open the circulation channel valve 61V, and close the liquid alkali inlet valve 24V, the hydrogen peroxide inlet valve 35V, the circulation branch valve 62V, and the transfer pump 70, and continue circulating for 6 hours.

[0159] Then, close the vacuum port 53. After venting, sequentially open the finished product outlet valve 41v and close the circulation channel valve 61v, transferring the material to the finished product reactor via the circulation pump 60. Samples of the alkyl glycoside finished product were taken for testing; the color was 25 Hazen.

[0160] 3. Third implementation method

[0161] 3.1 Technical Solution of the Third Implementation Method

[0162] See Figure 3 .

[0163] An alkyl glycoside decolorization device, the device comprising a raw glycoside inlet 12, a water inlet 13, a liquid alkali inlet 24, a hydrogen peroxide inlet 35, a vacuum port 53, and a finished product outlet 41.

[0164] The original glycoside inlet 12 is equipped with an original glycoside inlet valve 12v.

[0165] Water inlet 13 is equipped with water inlet valve 13v.

[0166] A liquid alkali inlet valve 24v is installed at the liquid alkali inlet 24.

[0167] A hydrogen peroxide inlet valve 35V is installed at the hydrogen peroxide inlet 35.

[0168] A vacuum port valve is installed at vacuum port 53.

[0169] Finished product outlet 41 is equipped with finished product outlet valve 41v.

[0170] The device includes a glycoside mixing tank 10 and a decolorizer 50; the original glycoside inlet 12 and the water inlet 13 are located in the glycoside mixing tank 10; the glycoside mixing tank outlet 17 is fed into the top of the decolorizer 50 through the transfer channel 54.

[0171] The material transfer channel 54 is equipped with a material transfer pump 70.

[0172] The transfer channel 54 is equipped with a transfer channel valve 54v, which is located downstream of the transfer pump 70.

[0173] Vacuum port 53 is located at the top of decolorizer 50.

[0174] The liquid alkali inlet 24 and the hydrogen peroxide inlet 35 are located in the material transfer channel 54.

[0175] The device is provided with a material circulation channel that takes out material from the bottom of the decolorizer 50 and returns material to the top of the decolorizer 50. The material circulation channel is equipped with a circulation pump 60 and a circulation channel valve 61v, which is located downstream of the circulation pump 60.

[0176] The position where the material is taken out from the bottom of the decolorizer 50 is the decolorizer outlet 55, and the decolorizer outlet 55 is equipped with a decolorizer outlet valve 55v.

[0177] The circulation channel includes a front section and a rear section; the front section starts from the bottom of the decolorizer 50 where the material is taken out and ends at the junction with the transfer channel 54; the rear section starts from the junction and enters the decolorizer through the transfer channel 54.

[0178] The circulation pump 60 and the circulation channel valve 61v are located at the front of the circulation channel.

[0179] The circulation channel is provided with a circulation branch 62, which includes a front section and a rear section. The front section of the circulation branch starts between the circulation pump 60 and the circulation channel valve 61v and ends at the point where it merges with the transfer channel 54. The rear section of the circulation branch starts from the point where it merges and is input to the decolorizer via the transfer channel 54.

[0180] A 62V circulation branch valve is installed at the front end of the circulation branch.

[0181] The junction of the circulation channel and the transfer channel 54 is located downstream of the transfer pump 70, and the junction of the circulation branch 62 and the transfer channel 54 is located upstream of the transfer pump 70.

[0182] The liquid alkali inlet 24 and hydrogen peroxide inlet 35 are located downstream of the junction of the circulation branch 62 and the transfer channel 54, and upstream of the transfer pump 70.

[0183] The finished product outlet 41 is located in the material circulation channel.

[0184] The finished product outlet 41 is located at the front end of the circulation channel; the finished product outlet 41 is located between the circulation pump 60 and the circulation channel valve 61v.

[0185] The decolorizer 50 is equipped with a material mixing component; the material mixing component is a swivel disc 52, and the material transfer channel 54 enters the decolorizer 50 through an inlet facing the upper surface of the swivel disc 52.

[0186] The device includes a finished product tank 40 and a finished product outlet 41 that enters the inlet of the finished product tank 40.

[0187] The device includes a liquid alkali storage tank 20, the outlet of which is connected to the liquid alkali inlet 24 for material intake.

[0188] The device includes a hydrogen peroxide storage tank 30 with its outlet connected to a hydrogen peroxide inlet 35 for material intake.

[0189] 3.2. Third Implementation Example

[0190] 3.2.1 Main Equipment Parameters

[0191] Same as 1.2.1.

[0192] 3.2.2 Operational Status

[0193] Confirm that the outlet valve 17V of the glycoside preparation vessel is closed. Open the water inlet valve 13V and add 1800kg of pure water to the glycoside preparation vessel 10. Start stirring and heat to and maintain 75±5℃. Open the original glycoside inlet valve 12V and add 4200kg of original glycoside to the glycoside preparation vessel 10 to dissolve and obtain the glycoside preparation solution.

[0194] Close the water inlet valve 13V and the original glycoside inlet valve 12V. Open the vacuum port 53 to control the vacuum degree in the decolorizer between -0.08MPa and -0.095MPa. Turn on the swivel plate 52, open the glycoside preparation vessel outlet valve 17V and the transfer channel valve 54V, and turn on the transfer pump 70 to feed the glycoside preparation solution into the decolorizer 50 at a rate of 12000kg / h. At the same time as feeding the glycoside preparation solution, open the liquid alkali inlet valve 24V and the hydrogen peroxide inlet valve 35V. The liquid alkali flow rate is 240kg / h and the addition amount is 120kg. The hydrogen peroxide flow rate is 180kg / h and the addition amount is 90kg. When the material in the mixing tank is emptied, close the outlet valve 17V, liquid alkali inlet valve 24V, hydrogen peroxide inlet valve 35V, and transfer pump 70 of the glycoside mixing tank. Open the outlet valve 55V, circulation channel valve 61V, and circulation pump 60 of the decolorizer to circulate the material. Maintain the temperature inside the decolorizer 50 at 75±5℃ and the flow rate of circulation pump 60 at 12000kg / h for 6 hours.

[0195] Then, replenish the solution while maintaining continuous circulation: sequentially open the circulation branch valve 62V, open the transfer pump 70, close the circulation channel valve 61V, then open the liquid alkali inlet valve 24V and the hydrogen peroxide inlet valve 35V, with the liquid alkali flow rate at 240kg / h and the addition amount at 60kg, and the hydrogen peroxide flow rate at 180kg / h and the addition amount at 90kg. Then, open the circulation channel valve 61V, and close the liquid alkali inlet valve 24V, the hydrogen peroxide inlet valve 35V, the circulation branch valve 62V, and the transfer pump 70, and continue circulating for 6 hours.

[0196] Then, close the vacuum port 53. After venting, sequentially open the finished product outlet valve 41v and close the circulation channel valve 61v, transferring the material to the finished product reactor via the circulation pump 60. Samples of the alkyl glycoside finished product were taken for testing; the color was 20 Hazen.

[0197] 4. Existing Technology Implementation Methods

[0198] 4.1 Existing Technology Implementation Methods

[0199] See Figure 4 .

[0200] The existing decolorization device is a decolorization kettle 1, which is a stirred kettle. The top of the kettle is equipped with a raw glycoside inlet 2, a water inlet 3, a liquid alkali inlet 4, and a hydrogen peroxide inlet 5, and the bottom of the kettle is equipped with a decolorization kettle outlet 7.

[0201] 4.2. Examples of Existing Technology Implementation Methods

[0202] 4.2.1 Main Equipment Parameters

[0203] Decolorization kettle 1: The main body is a vertical cylindrical structure with a diameter of DN3200 mm and a height of 3200 mm. Both the upper and lower parts are equipped with standard elliptical heads, and have built-in cooling coils and external heating pipes. It adopts paddle stirring.

[0204] 4.2.2 Operational Status

[0205] Confirm that the outlet 7 of the decolorizing kettle is closed. Add 1800 kg of pure water to the decolorizing kettle 1 through the water inlet 3, start stirring, heat to and maintain 75±5℃, and add 4200 kg of raw glycoside to the decolorizing kettle 1 through the raw glycoside inlet 2 to dissolve and obtain a glycoside solution.

[0206] 120 kg of liquid alkali was added to decolorizing vessel 1 through liquid alkali inlet 4 and stirred for 20 minutes. Then, hydrogen peroxide was added at a rate of 180 kg / h while stirring until the amount added was 90 kg. When the foam in the vessel reached 2 / 3 of the vessel height, the stirring was immediately turned off, and the reaction was allowed to stand until the foam decreased. The reaction was allowed to stand for a total of 8 hours until the foam decreased to 1 / 3 of the vessel height. Then, the first addition of liquid alkali and hydrogen peroxide was started.

[0207] Initial addition of liquid alkali and hydrogen peroxide: Add 30 kg of liquid alkali, start stirring, and after stirring for 20 minutes, start adding hydrogen peroxide at a rate of 180 kg / h. When 90 kg has been added, the foam height in the reactor is close to 2 / 3 of the reactor height. Immediately stop stirring, let the reaction stand and wait for the foam to decrease. After 8 hours of standing reaction, when the foam height in the reactor has decreased to 1 / 3, start adding liquid alkali and hydrogen peroxide again.

[0208] Add liquid alkali and hydrogen peroxide again: Add 60 kg of liquid alkali, start stirring, and after stirring for 20 minutes, add 60 kg of hydrogen peroxide at a rate of 180 kg / h. Then let it stand for 8 hours, stir for 20 minutes, and take a sample to test the finished glycoside product in the reactor. The color is 40 Hazen.

[0209] As can be seen from the above embodiments of the present invention and the prior art, the advantages of the present invention in decolorizing in a decolorizing device compared with the prior art in decolorizing in a decolorizing kettle are: the volume of the decolorizing device is only 1 / 3 of that of the decolorizing kettle, which greatly reduces the size of the decolorizing unit equipment; when the glycoside solution is 6000kg, the decolorizing time of the decolorizing device is shorter, the hydrogen peroxide consumption is lower, and the color of the finished product is lower.

Claims

1. An alkyl glycoside decolorization device, characterized in that: The device includes a raw glycoside inlet (12), a water inlet (13), a liquid alkali inlet (24), a hydrogen peroxide inlet (35), a vacuum port (53), and a finished product outlet (41); the raw glycoside inlet (12) is equipped with a raw glycoside inlet valve (12v), the water inlet (13) is equipped with a water inlet valve (13v), the liquid alkali inlet (24) is equipped with a liquid alkali inlet valve (24v), the hydrogen peroxide inlet (35) is equipped with a hydrogen peroxide inlet valve (35v), the vacuum port (53) is equipped with a vacuum port valve, and the finished product outlet (41) is equipped with a finished product outlet valve (41v); The device includes a glycoside mixing tank (10) and a decolorizer (50); the original glycoside inlet (12) and water inlet (13) are located in the glycoside mixing tank (10); the outlet (17) of the glycoside mixing tank is fed into the top of the decolorizer (50) through a transfer channel (54), the transfer channel (54) is equipped with a transfer pump (70), and the transfer channel (54) is equipped with a transfer channel valve (54v); the vacuum port (53) is located at the top of the decolorizer (50); the liquid alkali inlet (24) and the hydrogen peroxide inlet (35) are independently located at the top of the decolorizer (50) and / or the transfer channel (54); The device is provided with a material circulation channel that takes out material from the bottom of the decolorizer (50) and returns material to the top of the decolorizer (50). The material circulation channel is provided with a circulation pump (60) and a circulation channel valve (61v). The circulation channel valve (61v) is located downstream of the circulation pump (60). The position where the material is taken out from the bottom of the decolorizer (50) is the decolorizer outlet (55). The decolorizer outlet (55) is provided with a decolorizer outlet valve (55v).

2. The apparatus according to claim 1, characterized in that: The circulation channel includes a front section and a rear section; the front section starts from the bottom of the decolorizer (50) where the material is taken out and ends at the junction with the transfer channel (54); the rear section starts from the junction and enters the decolorizer through the transfer channel (54); the circulation pump (60) and the circulation channel valve (61v) are located in the front section of the circulation channel, and the circulation channel valve (61v) is located downstream of the circulation pump (60).

3. The apparatus according to claim 2, characterized in that: The circulation channel is provided with circulation branches (62), which include a front section and a rear section; the front section of the circulation branch starts between the circulation pump (60) and the circulation channel valve (61v) and ends at the point where it merges with the transfer channel (54); the rear section of the circulation branch starts from the point where it merges and is fed into the decolorizer via the transfer channel (54); the front section of the circulation branch is provided with a circulation branch valve (62v).

4. The apparatus according to claim 3, characterized in that: The junction of the circulation channel and the transfer channel (54) is located downstream of the transfer pump (70), and the junction of the circulation branch (62) and the transfer channel (54) is located upstream of the transfer pump (70).

5. The apparatus according to claim 4, characterized in that: The liquid alkali inlet (24) and hydrogen peroxide inlet (35) are located downstream of the junction of the circulation branch (62) and the transfer channel (54) and upstream of the transfer pump (70).

6. The apparatus according to claim 1, characterized in that: The finished product outlet (41) is located in the material circulation channel.

7. The apparatus according to claim 2, characterized in that: The finished product outlet (41) is located at the front of the circulation channel.

8. The apparatus according to claim 7, characterized in that: The finished product outlet (41) is located between the circulation pump (60) and the circulation channel valve (61v).

9. The apparatus according to claim 3, characterized in that: The finished product outlet (41) is located at the front section of the circulation channel, or the finished product outlet (41) is located at the front section of the circulation branch.

10. The apparatus according to claim 1, characterized in that: The decolorizer (50) is equipped with a material mixing component.

11. The apparatus according to claim 10, characterized in that: The material mixing component is a shovel (52).

12. The apparatus according to claim 10, characterized in that: The material is fed into the decolorizer (50) through an opening, which is partially or entirely oriented toward the upper surface of the swivel disc (52).

13. The apparatus according to claim 1, characterized in that: The device includes a finished product tank (40) with a finished product outlet (41) at the inlet of the finished product tank (40); and / or the device includes a liquid alkali storage tank (20) with the outlet of the liquid alkali storage tank (20) connected to the liquid alkali inlet (24) at the material collection end; and / or the device includes a hydrogen peroxide storage tank (30) with the inlet of the hydrogen peroxide inlet (35) at the material collection end.

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