CN102786560A - Preparation method of lauryl glucopyranoside - Google Patents
Preparation method of lauryl glucopyranoside Download PDFInfo
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- CN102786560A CN102786560A CN2011101304087A CN201110130408A CN102786560A CN 102786560 A CN102786560 A CN 102786560A CN 2011101304087 A CN2011101304087 A CN 2011101304087A CN 201110130408 A CN201110130408 A CN 201110130408A CN 102786560 A CN102786560 A CN 102786560A
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Abstract
The invention relates to a preparation method of lauryl glucopyranoside. Lauryl alcohol and glucopyranoside as raw materials are prepared into a lauryl glucopyranoside aqueous solution. The preparation method comprises the following steps of 1, glucose liquid preparation, 2, pre-heating for temperature increasing, 3, a condensation reaction, 4, reduced pressure flashing, 5, pH value adjustment, 6, solid-liquid separation, 7, evaporation alcohol-removal, 8, decoloration purification, and 9, blending. The preparation method has the advantages that a process flow is reasonable; reaction time is short; a production cost is low; quality is stable; a yield is high; reaction processes are safe and reliable; favorable conditions of separation and refining of chemical reaction products are provided; conditions of process industrialization are provided; and the preparation method is simple, convenient and fast.
Description
Technical field
The present invention relates to a kind of method of nonionogenic tenside preparation; Being particularly related to a kind of is that raw material passes through sugar fluid configuration, pre-heating temperature elevation, condensation reaction, vacuum flashing, adjusting pH value, evaporation dealcoholysis, decolouring removal of impurities, allocates the method that is mixed with the bay alkyl-glucoside with glucose and lauryl alcohol, belongs to the fine chemical technology field.
Background technology
The APG APG for short by the pure and mild glucose synthetic of renewable resources natural fat, is the more comprehensive new non-ionic surfactants of a kind of performance; Have very good ecology and toxicology character and outstanding physicochemical property and excellent compatibility ability, surface tension is low, moistening, strong detergency; Foam is abundant and fine and smooth; Can with any kind surfactant compound, synergistic effect is obvious, and nontoxic, harmless, non-stimulated; Biological degradability is superior to any one type of tensio-active agent now, is internationally recognized first-selection " green " functional surface promoting agent.APG can be used as the main raw material of daily-use chemical industries such as shampoo, body wash, cleansing milk, washing liquid, Liquid soap, dishwashing detergent liquid, vegetable and fruit clean-out system; Also be used in the synthetic detergents such as soap powder, free phosphate detergent, non-phosphide detergent; Also can be used as the emulsifying dispersant of food, agricultural chemicals, silicone oil, the synergistic agent of Insecticides (tech) & Herbicides (tech), plastic sheeting for farm use antifogging agent, additives for plastics; Also can be used for medicine, biotechnology, fire-fighting medicament, textile auxiliary agent, coating, sensitive materials, process hides, oil recovery, ore dressing, rubber and plastic, multiple field such as the energy is with a wide range of applications.Therefore, need a kind of process method and gordian technique for preparing APG of exploitation in a hurry.
Bay alkyl-glucoside (lauryl glucopyranoside, dodecyl glucopyranoside), molecular formula is C
18H
36O
6, molecular weight is 348.48, is white or faint yellow solid, and its softening temperature is 75 ℃, and decomposition point is 285 ℃, and the HLB value is 9, and is water-soluble, is soluble in alkaline solution.
Lauryl alcohol (dodecanol) has another name called lauryl alcohol (lauryl alcohol), and molecular formula is C
12H
26O, molecular weight are 186.38, and fusing point is 24 ℃, and boiling point is 255-259 ℃, for white solid or colourless liquid, has flowery odour, and its water insoluble, glycerine is dissolved in organic solvents such as Ucar 35, ethanol, benzene, chloroform, ether.Lauryl alcohol is an important chemical material, is mainly used in the raw material of preparation tensio-active agent, also can be used for making high duty detergent and weaving, leather processing auxiliary agent.
Glucose (glucose), molecular formula are C
6H
12O
6, molecular weight is 180, is white crystal, 146 ℃ of fusing points, and it is soluble in water, and it is sweet to distinguish the flavor of, and is a kind of monose that nature widely exists.Glucose is widely used in food-processing and medication chemistry, also in the printing and dyeing tanning industry, is used as reductive agent, in industry of system mirror and the glass liner of a thermos flask silver plating process, is used as reductive agent.
The method of industrial production bay alkyl-glucoside has two kinds at present, and a kind of is " two-step approach ", promptly with glucose and butanols glycosylation reaction takes place under acid catalysis earlier and generates the fourth glycosides; With lauryl alcohol and fourth glycosides glycosylation reaction takes place to change again, generate the bay alkyl-glucoside, the technical process of two-step approach is numerous and diverse; And the extra adding butanols of needs; Increased reaction times and energy expenditure greatly, production cost is high, and this kind working method is superseded basically at present.Another kind is " single stage method ", promptly directly carries out condensation reaction with lauryl alcohol with glucose, after neutralization, distillation and decolouring bleaching, obtains the bay alkyl-glucoside then, and this method is the main stream approach for preparing production bay alkyl-glucoside at present.
To be raw material prepare the subject matter that bay alkyl-glucoside product exists through single stage method is with glucose and lauryl alcohol:
(1) because glucose does not dissolve, form solid-liquid two phases in lauryl alcohol, the condensation reaction of being carried out is a solid-liquid reaction, and speed of response is slow, and long reaction time, and also caking easily of glucose make the glucose can not complete reaction, and reaction is difficult to carry out thoroughly.
(2) because condensation reaction time is long, in condensation reaction system, have acid catalyst simultaneously, dehydration condensation and gluconate dehydratase between the glucose take place easily, make that impurity contains height in the product, color is dark.
(3) method that the single stage method of reporting at present prepares the bay alkyl-glucoside all adopts the dextrose anhydrous microparticle as raw material, and preparation cost is high.
(4) process operation, control difficulty, production efficiency is low, and yield is low.
(5) decolouring employing ydrogen peroxide 50 is an oxygenant, and the decolouring bleaching effect is poor, the decolouring poor stability.
Summary of the invention
The objective of the invention is deficiency, the novel method for preparing the bay alkyl-glucoside that a kind of preparation technology is rationally convenient, production cost is low, safe preparation process is reliable, reaction is thorough, the preparing product quality is good, yield is high is provided to prior art.
Realize that the above-mentioned purpose technical scheme is: a kind of method for preparing the bay alkyl-glucoside is to be the method for the feedstock production bay alkyl-glucoside aqueous solution with lauryl alcohol and glucose, and said method steps is following:
(1) sugar fluid configuration: in whipping device, add entry, add glucose and dissolve, the mass ratio of glucose and water is 0.9～1.5:1.0;
(2) pre-heating temperature elevation: will go up the liquid glucose material that obtains of step and carry out heat temperature raising to 80～110 ℃, insulation then;
(3) condensation reaction: liquid glucose that above-mentioned pre-heating temperature elevation is good and the alkyd mixture through pre-heating temperature elevation to 140～220 ℃ are squeezed in the condensation reactor through HPP respectively, and dehydration condensation takes place, and the alkyd mixture is lauryl alcohol and catalyst acid;
(4) vacuum flashing: the last material that obtains of step directly gets in the vacuum flashing equipment, further carries out glycosylation reaction, and gas-phase product utilizes through condensing and recycling again, and liquid product is dissolved in and forms homogeneous phase solution in the lauryl alcohol and get into next step;
(5) regulate pH value: will go up the material that a step obtains and be cooled to 80～90 ℃, and carry out neutralizing treatment to wherein adding mineral alkali, adjusting pH value is 8～10;
(6) solid-liquid separates: will go up the material that a step obtains and separate through solid-liquid, liquid phase gets into next step, and solid phase is handled the back and used as the raw material of the first step configuration liquid glucose;
(7) evaporation dealcoholysis: will go up the liquid phase material that obtains of step and put into evaporation dealcoholysis equipment and evaporate dealcoholysis, and steam lauryl alcohol, and obtain the glucosides bullion, and get into next step and carry out aftertreatment, the raw material that lauryl alcohol directly returned as the 3rd step uses;
(8) decolouring removal of impurities: will go up the material that obtains of step and put into electrochemical reactor and carry out electrochemical oxidation-reduction-decolor removal of impurities;
(9) allotment mixes: will go up the material that a step obtains and put into the allotment mixing equipment, and to wherein adding clear water, be mixed with bay alkyl-glucoside aqueous solution finished product.
Further, the service temperature of the 3rd step condensation reaction is 120 ℃～180 ℃.
Further, the condensation reactor in the 3rd step condensation reaction is any one in injection stream reaction apparatus, percussion flow reaction apparatus, plug flow reaction apparatus, tubular chemical reactor or the static mixer.
Further, the catalyst acid described in the 3rd step is any in sulfuric acid, hydrochloric acid, phosphoric acid, Witco 1298 Soft Acid, tosic acid, the alkyl naphthalene sulfonic acid.
Further, in the 3rd step condensation reaction, glucose: lauryl alcohol: the mass ratio of catalyst acid is 1:2～8:0.01～0.03.
Further, the mineral alkali described in the 5th step pH value is regulated is any in sodium hydroxide, Pottasium Hydroxide, ammoniacal liquor, yellow soda ash or the salt of wormwood.
Further, in the evaporation dealcoholysis of the 7th step, the operation absolute pressure is 60～150Pa.
Further, the electrochemical reactor of the 8th step decolouring removal of impurities is any in plate electrochemical reactor, fixed bed electrochemical reactor or the fluidized bed electrochemical reactor drum.
Principal reaction principle of the present invention is:
Technical scheme of the present invention is mainly innovated in the following areas: (1) adopts glucose solution to add, and has avoided the preparation of microparticle sugar; (2) make pure sugar carry out liquid-liquid reactions, the carrying out of the reaction of being used in arranged, and can be through adding speed and control reaction temperature, the quality of control reaction product; (3) adopt electrochemical oxidation-reduction technique, carry out degree of depth decolouring removal of impurities; (4) process operation security, safety height.
Realize that the main technique equipment that the present invention needs is: whipping device, condensation reactor, vacuum flashing equipment, neutralization reactor, evaporation dealcoholysis equipment, solid-liquid separating device, decolouring impurity removing equipment electrochemical reactor, allotment mixing equipment etc.Safety is high.
The present invention adopts the advantage of technique scheme to be:
(1) in the process of lauryl alcohol and glucose generation condensation reaction; Making full use of the reaction under acid catalysis of glucose and Fatty Alcohol(C12-C14 and C12-C18) is characteristics reversible, thermo-negative reaction, and the glucosides that generates not only had been dissolved in higher alcohols but also water-soluble characteristics, and the speed of response of glucose and higher alcohols is than very fast; Be thermo-negative reaction; But heat effect is very not big, can the water that generate in the reaction in time be removed through vacuum flashing, to improve the transformation efficiency and the speed of reaction; Glucose is mixed with liquid glucose, avoided the preparation of present microparticle sugar, and the process control of technology is simple; Simultaneously, condensation reaction is become liquid-liquid reactions by solid-liquid reaction, help improving speed of reaction and reaction yield, adopt liquid-liquid high-efficiency mixing device to improve the dispersiveness of liquid-liquid system; Liquid glucose and Fatty Alcohol(C12-C14 and C12-C18) are carried out preheating before hybrid reaction,, further improve the speed of reaction for the moisture evaporation in later stage provides condition.
(2) glucose is made into the aqueous solution; Liquid glucose joins in alcohol, the sour mixing system, can protect the autohemagglutination of sugar, and the side reaction that reduces sugar takes place; And through the mobile method of shearing of liquid at high speed; Can improve the concentration of system response thing, help the carrying out that react, and improve the rate of heat transfer in the reaction process.
(3) material after the condensation reaction is handled and is adopted reduced pressure distillation technique, further removes the moisture that produces in the condensation reaction, and reaction is carried out thoroughly, simultaneously, adopts flash evaporation technology that the reacting rear material that obtains is cooled off rapidly.
(4) the pH value of reacting rear material is adjusted to alkalescence after, adopt the solid-liquid stripping technique to carry out removal of impurities, to reduce the foreign matter content in the last handling process.
(5) adopt underpressure distillation to recycle intact raw material lauryl alcohol and the byproduct of reaction of unreacted after the condensation reaction, reach the purpose of product removal of impurities simultaneously.
(6) adopt electrochemical oxidation-reduction technique, carry out degree of depth decolouring removal of impurities, process operation security, safety height.The decolouring impurity-eliminating effect is very good.
Preparation technology of the present invention is reasonable, and product purity is high, steady quality; Yield is high, has guaranteed that also the safe reliability of reaction process improves greatly simultaneously, and advantageous conditions is provided for the separation and purification of product; For process serialization suitability for industrialized production provides condition; Preparing method of the present invention is simple, and preparation is fast convenient, and process is safe and reliable.Therefore, preparation technology of the present invention is rationally convenient, and safe preparation process is reliable, and production cost is low, and reaction is thorough, and the preparing product quality is good, and yield is high.
Description of drawings
Accompanying drawing is a process flow sheet of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
Embodiment one
Main technique equipment is: whipping device, condensation reactor, the anti-equipment of vacuum flashing, neutralization reactor, dealcoholization device, decolouring impurity removing equipment, solid-liquid separating equipment, allotment mixing equipment etc.; Wherein condensation reactor is the injection stream reaction apparatus; Vacuum flashing equipment is the flash distillation still; Neutralization reactor stirs reaction apparatus for the still formula, and evaporation dealcoholysis equipment is vaporizer, and the decolouring impurity removing equipment is plate electrochemical reactor; Whipping device is a tank reactor, and the allotment mixing equipment is the allotment mixing kettle.
As shown in the figure, a kind of method for preparing the bay alkyl-glucoside is to be the method for the feedstock production bay alkyl-glucoside aqueous solution with lauryl alcohol and glucose, and said method steps is following:
(1) sugar fluid configuration: 10 kg water are added in the tank reactor, and to wherein adding glucose 10 kg, the mass ratio of glucose and water is 1.0:1.0 then;
(2) pre-heating temperature elevation: will go up the liquid glucose material that obtains of step and carry out heat temperature raising to 105 ℃, insulation then;
(3) condensation reaction: will go up a good liquid glucose of step pre-heating temperature elevation and remove solid impurity through strainer respectively through the alkyd mixture of pre-heating temperature elevation to 220 ℃; Squeeze into the injection stream reaction apparatus through HPP; The alkyd mixture is lauryl alcohol and catalyst acid, and catalyst acid is a sulfuric acid, carries out the product that the condensation dehydration reaction obtains and is dissolved in the lauryl alcohol; Glucose: lauryl alcohol: the mass ratio of catalyst acid is 1:2:0.01, and the service temperature of condensation reaction is 180 ℃;
(4) vacuum flashing: the material that a last step obtains directly gets into the flash distillation still; Further remove the water that generates in the condensation reaction through vacuum flashing; Glycosylation reaction is further carried out thoroughly; Gas-phase product utilizes through condensing and recycling again, and liquid product is dissolved in the lauryl alcohol and forms homogeneous phase solution and get into next step;
(5) regulate pH value: will go up the material that a step obtains and be cooled to 85 ℃, and carry out neutralizing treatment to wherein adding mineral alkali sodium hydroxide, adjusting pH value is 9;
(6) solid-liquid separation: will go up the material that obtains of step and separate through solid-liquid, liquid phase gets into next step, and solid phase is handled the back and used as the raw material of the first step configuration liquid glucose;
(7) evaporation dealcoholysis: will go up the material that obtains of step and squeeze in the vaporizer, and under the condition of absolute working pressure 60Pa, steam lauryl alcohol, and obtain the glucosides bullion, and get into next step and carry out aftertreatment, the raw material that lauryl alcohol directly returned as the 3rd step uses;
(8) decolouring removal of impurities: will go up the material that obtains of step and put into electrochemical reactor and carry out electrochemical oxidation-reduction-decolor removal of impurities.
(9) allotment mixes: will go up the material that a step obtains and put into the allotment mixing kettle, and to wherein adding clear water, be mixed with 50% bay alkyl-glucoside aqueous solution finished product.
Embodiment two
Main technique equipment is: basic identical with embodiment one, different is that condensation reactor is the percussion flow reaction apparatus, and the decolouring impurity removing equipment is the fixed bed electrochemical reactor.
As shown in the figure, a kind of method for preparing the bay alkyl-glucoside is to be the method for the feedstock production bay alkyl-glucoside aqueous solution with lauryl alcohol and glucose, and said method steps is following:
(1) sugar fluid configuration: 10 kg water are added in the tank reactor, and to wherein adding glucose 10 kg, the mass ratio of glucose and water is 1.0:1.0 then;
(2) pre-heating temperature elevation: will go up the liquid glucose material that obtains of step and carry out heat temperature raising to 90 ℃, insulation then;
(3) condensation reaction: will go up a good liquid glucose of step pre-heating temperature elevation and remove solid impurity through strainer respectively through the alkyd mixture of pre-heating temperature elevation to 170 ℃; Squeeze into the percussion flow reaction apparatus through HPP; The alkyd mixture is lauryl alcohol and catalyst acid, and catalyst acid is a hydrochloric acid, carries out the product that the condensation dehydration reaction obtains and is dissolved in the lauryl alcohol; Glucose: lauryl alcohol: the mass ratio of catalyst acid is 1:4:0.02, and the service temperature of condensation reaction is 150 ℃;
(4) vacuum flashing: the material that a last step obtains directly gets into the flash distillation still; Further remove the water that generates in the condensation reaction through vacuum flashing; Glycosylation reaction is further carried out thoroughly; Gas-phase product utilizes through condensing and recycling again, and liquid product is dissolved in the lauryl alcohol and forms homogeneous phase solution and get into next step;
(5) regulate pH value: will go up the material that a step obtains and be cooled to 85 ℃, and carry out neutralizing treatment to wherein adding mineral alkali Pottasium Hydroxide, adjusting pH value is 9;
(6) solid-liquid separation: will go up the material that obtains of step and separate through solid-liquid, liquid phase gets into next step, and solid phase is handled the back and used as the raw material of the first step configuration liquid glucose;
(7) evaporation dealcoholysis: will go up the material that obtains of step and squeeze in the vaporizer, and under the condition of absolute working pressure 100Pa, steam lauryl alcohol, and obtain the glucosides bullion, and get into next step and carry out aftertreatment, the raw material that lauryl alcohol directly returned as the 3rd step uses;
(8) decolouring removal of impurities: will go up the material that obtains of step and put into electrochemical reactor and carry out electrochemical oxidation-reduction-decolor removal of impurities.
(9) allotment mixes: will go up the material that a step obtains and put into the allotment mixing kettle, and to wherein adding clear water, be mixed with 50% bay alkyl-glucoside aqueous solution finished product.
Embodiment three
Main technique equipment is: basic identical with embodiment one, different is that condensation reactor is the plug flow reaction apparatus, and the decolouring impurity removing equipment is the fluidized bed electrochemical reactor drum.
As shown in the figure, a kind of method for preparing the bay alkyl-glucoside is to be the method for the feedstock production bay alkyl-glucoside aqueous solution with lauryl alcohol and glucose, and said method steps is following:
(1) sugar fluid configuration: 10 kg water are added in the tank reactor, and to wherein adding glucose 9 kg, the mass ratio of glucose and water is 0.9:1.0 then;
(2) pre-heating temperature elevation: will go up the liquid glucose material that obtains of step and carry out heat temperature raising to 100 ℃, insulation then;
(3) condensation reaction: will go up a good liquid glucose of step pre-heating temperature elevation and remove solid impurity through strainer respectively through the alkyd mixture of pre-heating temperature elevation to 185 ℃; Squeeze into the plug flow reaction apparatus through HPP; The alkyd mixture is lauryl alcohol and catalyst acid, and catalyst acid is a phosphoric acid, carries out the product that the condensation dehydration reaction obtains and is dissolved in the lauryl alcohol; Glucose: lauryl alcohol: the mass ratio of catalyst acid is 1:5:0.03, and the service temperature of condensation reaction is 160 ℃;
(4) vacuum flashing: the material that a last step obtains directly gets into the flash distillation still; Further remove the water that generates in the condensation reaction through vacuum flashing; Glycosylation reaction is further carried out thoroughly; Gas-phase product utilizes through condensing and recycling again, and liquid product is dissolved in the lauryl alcohol and forms homogeneous phase solution and get into next step;
(5) regulate pH value: will go up the material that a step obtains and be cooled to 80 ℃, and carry out neutralizing treatment to wherein adding mineral alkali ammoniacal liquor, adjusting pH value is 8;
(6) solid-liquid separation: will go up the material that obtains of step and separate through solid-liquid, liquid phase gets into next step, and solid phase is handled the back and used as the raw material of the first step configuration liquid glucose;
(7) evaporation dealcoholysis: will go up the material that obtains of step and squeeze in the vaporizer, and under the condition of absolute working pressure 120Pa, steam lauryl alcohol, and obtain the glucosides bullion, and get into next step and carry out aftertreatment, the raw material that lauryl alcohol directly returned as the 3rd step uses;
(8) decolouring removal of impurities: will go up the material that obtains of step and put into electrochemical reactor and carry out electrochemical oxidation-reduction-decolor removal of impurities.
(9) allotment mixes: will go up the material that a step obtains and put into the allotment mixing kettle, and to wherein adding clear water, be mixed with 50% bay alkyl-glucoside aqueous solution finished product.
Embodiment four
Main technique equipment is: basic identical with embodiment one, different is that condensation reactor is a tubular chemical reactor.
As shown in the figure, a kind of method for preparing the bay alkyl-glucoside is to be the method for the feedstock production bay alkyl-glucoside aqueous solution with lauryl alcohol and glucose, and said method steps is following:
(1) sugar fluid configuration: 10 kg water are added in the tank reactor, and to wherein adding glucose 15 kg, the mass ratio of glucose and water is 1.5:1.0 then;
(2) pre-heating temperature elevation: will go up the liquid glucose material that obtains of step and carry out heat temperature raising to 110 ℃, insulation then;
(3) condensation reaction: will go up a good liquid glucose of step pre-heating temperature elevation and remove solid impurity through strainer respectively through the alkyd mixture of pre-heating temperature elevation to 150 ℃; Squeeze into tubular chemical reactor through HPP; The alkyd mixture is lauryl alcohol and catalyst acid, and catalyst acid is a Witco 1298 Soft Acid, carries out the product that the condensation dehydration reaction obtains and is dissolved in the lauryl alcohol; Glucose: lauryl alcohol: the mass ratio of catalyst acid is 1:7:0.03, and the service temperature of condensation reaction is 140 ℃;
(4) vacuum flashing: the material that a last step obtains directly gets into the flash distillation still; Further remove the water that generates in the condensation reaction through vacuum flashing; Glycosylation reaction is further carried out thoroughly; Gas-phase product utilizes through condensing and recycling again, and liquid product is dissolved in the lauryl alcohol and forms homogeneous phase solution and get into next step;
(5) regulate pH value: will go up the material that a step obtains and be cooled to 90 ℃, and carry out neutralizing treatment to wherein adding mineral alkali yellow soda ash, adjusting pH value is 10;
(6) solid-liquid separation: will go up the material that obtains of step and separate through solid-liquid, liquid phase gets into next step, and solid phase is handled the back and used as the raw material of the first step configuration liquid glucose;
(7) evaporation dealcoholysis: will go up the material that obtains of step and squeeze in the vaporizer, and under the condition of absolute working pressure 150Pa, steam lauryl alcohol, and obtain the glucosides bullion, and get into next step and carry out aftertreatment, the raw material that lauryl alcohol directly returned as the 3rd step uses;
(8) decolouring removal of impurities: will go up the material that obtains of step and put into electrochemical reactor and carry out electrochemical oxidation-reduction-decolor removal of impurities.
(9) allotment mixes: will go up the material that a step obtains and put into the allotment mixing kettle, and to wherein adding clear water, be mixed with 50% bay alkyl-glucoside aqueous solution finished product.
Embodiment five
Main technique equipment is: basic identical with embodiment one, different is that condensation reactor is a static mixer, and the decolouring impurity removing equipment is the fixed bed electrochemical reactor.
As shown in the figure, a kind of method for preparing the bay alkyl-glucoside is to be the method for the feedstock production bay alkyl-glucoside aqueous solution with lauryl alcohol and glucose, and said method steps is following:
(1) sugar fluid configuration: 10 kg water are added in the tank reactor, and to wherein adding glucose 12 kg, the mass ratio of glucose and water is 1.2:1.0 then;
(2) pre-heating temperature elevation: will go up the liquid glucose material that obtains of step and carry out heat temperature raising to 80 ℃, insulation then;
(3) condensation reaction: will go up a good liquid glucose of step pre-heating temperature elevation and remove solid impurity through strainer respectively through the alkyd mixture of pre-heating temperature elevation to 140 ℃; Squeeze into static mixer through HPP; The alkyd mixture is lauryl alcohol and catalyst acid, and catalyst acid is a tosic acid, carries out the product that the condensation dehydration reaction obtains and is dissolved in the lauryl alcohol; Glucose: lauryl alcohol: the mass ratio of catalyst acid is 1:8:0.03, and the service temperature of condensation reaction is 120 ℃;
(4) vacuum flashing: the material that a last step obtains directly gets into the flash distillation still; Further remove the water that generates in the condensation reaction through vacuum flashing; Glycosylation reaction is further carried out thoroughly; Gas-phase product utilizes through condensing and recycling again, and liquid product is dissolved in the lauryl alcohol and forms homogeneous phase solution and get into next step;
(5) regulate pH value: will go up the material that a step obtains and be cooled to 88 ℃, and carry out neutralizing treatment to wherein adding mineral alkali salt of wormwood, adjusting pH value is 9;
(6) solid-liquid separation: will go up the material that obtains of step and separate through solid-liquid, liquid phase gets into next step, and solid phase is handled the back and used as the raw material of the first step configuration liquid glucose;
(7) evaporation dealcoholysis: will go up the material that obtains of step and squeeze in the vaporizer, and under the condition of absolute working pressure 80Pa, steam lauryl alcohol, and obtain the glucosides bullion, and get into next step and carry out aftertreatment, the raw material that lauryl alcohol directly returned as the 3rd step uses;
(8) decolouring removal of impurities: will go up the material that obtains of step and put into electrochemical reactor and carry out electrochemical oxidation-reduction-decolor removal of impurities.
(9) allotment mixes: will go up the material that a step obtains and put into the allotment mixing kettle, and to wherein adding clear water, be mixed with 50% bay alkyl-glucoside aqueous solution finished product.
Embodiment six
Main technique equipment is: basic identical with embodiment one, different is that the decolouring impurity removing equipment is the fluidized bed electrochemical reactor drum.
As shown in the figure; A kind of method for preparing the bay alkyl-glucoside; Be to be the method for the feedstock production bay alkyl-glucoside aqueous solution with lauryl alcohol and glucose, said method steps and embodiment one are basic identical, and different is: the catalyst acid in the 3rd step condensation reaction is an alkyl naphthalene sulfonic acid.
Except that the foregoing description, each item numerical value of the present invention can be chosen arbitrarily in optimal values scope of the present invention.
Remove above-mentioned each embodiment, embodiment of the present invention also have a lot, can't be exhaustive, and the technical scheme that all employings are equal to or equivalence is replaced is all within protection scope of the present invention.
Claims (8)
1. method for preparing the bay alkyl-glucoside is to be the method for the feedstock production bay alkyl-glucoside aqueous solution with lauryl alcohol and glucose, it is characterized in that said method steps is following:
(1) sugar fluid configuration: in whipping device, add entry, add glucose and dissolve, the mass ratio of glucose and water is 0.9～1.5:1.0;
(2) pre-heating temperature elevation: will go up the liquid glucose material that obtains of step and carry out heat temperature raising to 80～110 ℃, insulation then;
(3) condensation reaction: liquid glucose that above-mentioned pre-heating temperature elevation is good and the alkyd mixture through pre-heating temperature elevation to 140～220 ℃ are squeezed in the condensation reactor through HPP respectively, and dehydration condensation takes place, and the alkyd mixture is lauryl alcohol and catalyst acid;
(4) vacuum flashing: the last material that obtains of step directly gets in the vacuum flashing equipment, further carries out glycosylation reaction, and gas-phase product utilizes through condensing and recycling again, and liquid product is dissolved in and forms homogeneous phase solution in the lauryl alcohol and get into next step;
(5) regulate pH value: will go up the material that a step obtains and be cooled to 80～90 ℃, and carry out neutralizing treatment to wherein adding mineral alkali, adjusting pH value is 8～10;
(6) solid-liquid separates: will go up the material that a step obtains and separate through solid-liquid, liquid phase gets into next step, and solid phase is handled the back and used as the raw material of the first step configuration liquid glucose;
(7) evaporation dealcoholysis: will go up the liquid phase material that obtains of step and put into evaporation dealcoholysis equipment and evaporate dealcoholysis, and steam lauryl alcohol, and obtain the glucosides bullion, and get into next step and carry out aftertreatment, the raw material that lauryl alcohol directly returned as the 3rd step uses;
(8) decolouring removal of impurities: will go up the material that obtains of step and put into electrochemical reactor and carry out electrochemical oxidation-reduction-decolor removal of impurities;
(9) allotment mixes: will go up the material that a step obtains and put into the allotment mixing equipment, and to wherein adding clear water, be mixed with bay alkyl-glucoside aqueous solution finished product.
2. according to the said method for preparing the bay alkyl-glucoside of claim 1, it is characterized in that: the service temperature of the 3rd step condensation reaction is 120 ℃～180 ℃.
3. according to the said method for preparing the bay alkyl-glucoside of claim 1, it is characterized in that: the condensation reactor in the 3rd step condensation reaction is any one in injection stream reaction apparatus, percussion flow reaction apparatus, plug flow reaction apparatus, tubular chemical reactor or the static mixer.
4. according to the said method for preparing the bay alkyl-glucoside of claim 1, it is characterized in that: the catalyst acid described in the 3rd step is any in sulfuric acid, hydrochloric acid, phosphoric acid, Witco 1298 Soft Acid, tosic acid, the alkyl naphthalene sulfonic acid.
5. according to the said method for preparing the bay alkyl-glucoside of claim 1, it is characterized in that: in the 3rd step condensation reaction, glucose: lauryl alcohol: the mass ratio of catalyst acid is 1:2～8:0.01～0.03.
6. according to the said method for preparing the bay alkyl-glucoside of claim 1, it is characterized in that: the mineral alkali described in the 5th step pH value is regulated is any in sodium hydroxide, Pottasium Hydroxide, ammoniacal liquor, yellow soda ash or the salt of wormwood.
7. according to the said method for preparing the bay alkyl-glucoside of claim 1, it is characterized in that: in the evaporation dealcoholysis of the 7th step, the operation absolute pressure is 60～150Pa.
8. according to the said method for preparing the bay alkyl-glucoside of claim 1, it is characterized in that: the electrochemical reactor of the 8th step decolouring removal of impurities is any in plate electrochemical reactor, fixed bed electrochemical reactor or the fluidized bed electrochemical reactor drum.
Priority Applications (1)
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| CN103319549A (en) * | 2013-07-18 | 2013-09-25 | 扬州大学 | Synthetic method of alkyl glycoside |
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| CN1061434A (en) * | 1990-11-09 | 1992-05-27 | 亨克尔两合股份公司 | The surface active paste of stability |
| WO1999003869A2 (en) * | 1997-07-18 | 1999-01-28 | Henkel Kommanditgesellschaft Auf Aktien | Method for producing alkyl glycosides |
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| CN1061434A (en) * | 1990-11-09 | 1992-05-27 | 亨克尔两合股份公司 | The surface active paste of stability |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103319549A (en) * | 2013-07-18 | 2013-09-25 | 扬州大学 | Synthetic method of alkyl glycoside |
| CN103319549B (en) * | 2013-07-18 | 2015-08-19 | 扬州大学 | A kind of synthetic method of alkyl glycoside |
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