阅读说明：本技术 环保溶剂制备方法 (Preparation method of environment-friendly solvent ) 是由 钱立新 章学军 张保宏 于 2021-08-23 设计创作，主要内容包括：本发明公开了环保溶剂制备方法,按重量份数称取原料,基础油45-70份、抗氧剂5-13份、表面活性剂10-15份、乙醇5-10份、促溶剂1-5份、防冻剂1-5份；所述基础油采用回收的地沟油；原料预处理,回收的地沟油先进行过滤；过滤后将地沟油与脂肪酶混合,进行水解处理,得到脂肪酸和甘油；步骤3得到的产物再进行酸化和酯化处理,所述酸化处理采用酸性催化剂,酯化处理后得到脂肪酸正辛脂；将其余原料与步骤4的产物,加入混合釜中搅拌均匀；自然冷却后,成品检测后灌装入库。制备简单,通过协同配合,将地沟油回收,进行过滤、水解、酸化、酯化等处理,然后通过搅拌调制出环保溶剂,该溶剂对农药具有良好的溶解度,环境友好,适合推广。(The invention discloses a preparation method of an environment-friendly solvent, which comprises the following steps of weighing 45-70 parts of base oil, 5-13 parts of antioxidant, 10-15 parts of surfactant, 5-10 parts of ethanol, 1-5 parts of dissolution accelerator and 1-5 parts of anti-freezing agent by weight; the base oil is recovered swill-cooked dirty oil; pretreating raw materials, and filtering the recovered swill-cooked dirty oil; filtering, mixing the illegal cooking oil with lipase, and performing hydrolysis treatment to obtain fatty acid and glycerol; carrying out acidification and esterification treatment on the product obtained in the step 3, wherein an acidic catalyst is adopted in the acidification treatment, and fatty acid n-octyl ester is obtained after the esterification treatment; adding the rest raw materials and the product obtained in the step (4) into a mixing kettle, and uniformly stirring; and after natural cooling, finished products are filled and put in storage after being detected. The environment-friendly solvent is prepared by recycling the illegal cooking oil through synergistic cooperation, filtering, hydrolyzing, acidifying, esterifying and the like, and stirring.)

1. The preparation method of the environment-friendly solvent is characterized by comprising the following steps:

step 1: weighing raw materials, 45-70 parts of base oil, 5-13 parts of antioxidant, 10-15 parts of surfactant, 5-10 parts of ethanol, 1-5 parts of dissolution promoter and 1-5 parts of antifreezing agent according to parts by weight;

the base oil is recycled swill-cooked dirty oil, the antioxidant is tea polyphenol or tocopherol, and the surfactant is polyoxyethylene sorbitan monooleate;

step 2: pretreating raw materials, filtering the recovered swill-cooked dirty oil to remove solid impurities, suspended matters and the like contained in the swill-cooked dirty oil;

and step 3: filtering, mixing the illegal cooking oil with lipase, and performing hydrolysis treatment to obtain fatty acid and glycerol;

and 4, step 4: carrying out acidification and esterification treatment on the product obtained in the step 3, wherein an acidic catalyst is adopted in the acidification treatment, and fatty acid n-octyl ester is obtained after the esterification treatment;

and 5: adding the rest raw materials and the product obtained in the step (4) into a mixing kettle, and uniformly stirring, wherein the heating temperature is 35-55 ℃;

step 6: and after natural cooling, finished products are filled and put in storage after being detected.

2. The method for preparing an environmentally friendly solvent according to claim 1, wherein: the base oil is derived from swill-cooked dirty oil produced in fast food restaurants, school canteens, and residential kitchens.

3. The method for preparing an environmentally friendly solvent according to claim 1, wherein: the hydrolysis condition of the step 3 is ph7.5, the hydrolysis temperature is 50-60 ℃, and the hydrolysis time is 5-8 h.

4. The method for preparing an environmentally friendly solvent according to claim 1, wherein: the acidic catalyst is sulfuric acid, methanesulfonic acid, p-toluenesulfonic acid, acidic resin or solid acid.

5. The method for preparing an environmentally friendly solvent according to claim 1, wherein: the antifreezing agent is one or more of n-butanol, ethylene glycol, propylene glycol, glycerol, polyethylene glycol and sorbitol.

6. The method for preparing an environmentally friendly solvent according to claim 1, wherein: the cosolvent comprises chloromethyl, epoxy soybean oleic acid-2-methyl hexyl ester, n-hexyl alcohol and n-heptyl alcohol.

7. The method for preparing an environmentally friendly solvent according to claim 1, wherein: the weight ratio of the acidized illegal cooking oil to the acid catalyst is 10:1, and the acidized illegal cooking oil and the acid catalyst are stirred and heated to 80-120 ℃.

Technical Field

The invention relates to the technical field of pesticide preparations, in particular to a preparation method of an environment-friendly solvent.

Background

Generally, pesticide formulations mainly include emulsifiable concentrates, aqueous emulsions, microemulsions and soluble liquid solutions, and a large amount of organic solvents are used as solvents in the production process, and the large amount of application of the organic solvents causes many problems. In the application process of the pesticide preparation product, the organic solvent has larger residues in the prevention and treatment of crops and the environment, and poses great threat to the safety of agricultural production and the environmental safety. Secondly, the organic solvents of methanol, xylene, toluene and benzene are used as the solvents to produce pesticide products, a great amount of safety risks exist in the production and transportation processes, the solvents can threaten the health of workers in the production and application processes, and producers and users are easy to frequently contact with each other to cause benzene poisoning and air pollution. An environment-friendly and safe pesticide solvent with small harm to the environment and crops is urgently needed. And the existing solvent has poor dissolving effect.

CN 201010559942.5A substitute for benzene solvent in pesticide emulsifiable solution, which adopts vegetable oil to replace organic solvent in the prior art, CN 201210407288.5A preparation method of Jatropha curcas source pesticide solvent, wherein Jatropha curcas oil is matched with methanol to dissolve pesticide, and vegetable oil is used to substitute for related methanol, xylene and toluene, thereby reducing the use of harmful substances, but the source of the vegetable oil can increase the cost of pesticide solvent, and the vegetable oil can be used after related treatment, and the process is complex. The waste oil is a waste biomass resource in the catering industry.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the technical defects and provide an environment-friendly solvent preparation method.

In order to achieve the purpose of the invention, the invention adopts the technical scheme that:

the preparation method of the environment-friendly solvent comprises the following steps:

step 1: weighing raw materials, 45-70 parts of base oil, 5-13 parts of antioxidant, 10-15 parts of surfactant, 5-10 parts of ethanol, 1-5 parts of dissolution promoter and 1-5 parts of antifreezing agent according to parts by weight;

the base oil is recycled swill-cooked dirty oil, the antioxidant is tea polyphenol or tocopherol, and the surfactant is polyoxyethylene sorbitan monooleate;

step 2: pretreating raw materials, filtering the recovered swill-cooked dirty oil to remove solid impurities, suspended matters and the like contained in the swill-cooked dirty oil;

and step 3: filtering, mixing the illegal cooking oil with lipase, and performing hydrolysis treatment to obtain fatty acid and glycerol;

and 4, step 4: carrying out acidification and esterification treatment on the product obtained in the step 3, wherein an acidic catalyst is adopted in the acidification treatment, and fatty acid n-octyl ester is obtained after the esterification treatment;

and 5: adding the rest raw materials and the product obtained in the step (4) into a mixing kettle, and uniformly stirring, wherein the heating temperature is 35-55 ℃;

step 6: and after natural cooling, finished products are filled and put in storage after being detected.

Further, the base oil is derived from swill-cooked dirty oil produced in fast food restaurants, school cafeterias, and residential kitchens.

Further, the hydrolysis condition of the step 3 is ph7.5, the hydrolysis temperature is 50-60 ℃, and the hydrolysis time is 5-8 h.

Further, the acidic catalyst is sulfuric acid, methanesulfonic acid, p-toluenesulfonic acid, acidic resin or solid acid.

Further, the antifreezing agent is one or a combination of more of n-butyl alcohol, ethylene glycol, propylene glycol, glycerol, polyethylene glycol and sorbitol.

Further, the cosolvent comprises chloromethyl, epoxidized soybean oleic acid-2-methyl hexyl ester, n-hexyl alcohol and n-heptyl alcohol.

Further, the weight ratio of the acidized illegal cooking oil to the acid catalyst is 10:1, and the mixture is stirred and heated to 80-120 ℃.

The invention has the beneficial effects that: the preparation method is simple, the illegal cooking oil is recovered through synergistic cooperation, the processes of filtering, hydrolyzing, acidifying, esterifying and the like are carried out, and then the environment-friendly solvent is prepared through stirring, has good solubility on pesticides, is environment-friendly and is suitable for popularization; the illegal cooking oil is adopted, the raw materials are easy to obtain, the cost is low, the production and use cost is reduced, the illegal cooking oil needs to be treated and used for manufacturing the solvent, the illegal cooking oil is changed into valuable, great social benefit and economic benefit are generated, the pesticide can be dissolved, the environment is more protected, toxic and benzene solvents in the traditional pesticide are replaced, and the harm to users and the environment is reduced; the surfactant is used for increasing the emulsification effect, reducing the surface tension of the solvent and having a solubilizing effect on the pesticide; the components are stirred and mixed under warm conditions, so that the mutual solubility effect can be improved, and the emulsifying effect of the surfactant can be improved; the antioxidant effectively inhibits the oxidation rancidity phenomenon of oil and prolongs the validity period of the pesticide; the dissolution promoter has higher efficiency on the dissolution promotion of the pesticide, and the antifreeze enables the storage effect of the solvent to be better.

Detailed Description

In order to make the content of the present invention more clearly understood, the technical solutions in the embodiments of the present invention are clearly and completely described below.

Example one

The preparation method of the environment-friendly solvent comprises the following steps:

step 1: weighing raw materials, 45 parts of base oil, 5 parts of antioxidant, 10 parts of surfactant, 5 parts of ethanol, 1 part of dissolution promoter and 1 part of antifreeze according to parts by weight;

the base oil is recycled gutter oil, the antioxidant is tea polyphenol, and the surfactant is polyoxyethylene sorbitan monooleate; the base oil is derived from swill-cooked dirty oil produced in fast food restaurants, school canteens and residential kitchens; the antifreezing agent is n-butyl alcohol; the cosolvent comprises chloromethyl, epoxy soybean oleic acid-2-methyl hexyl ester, n-hexyl alcohol and n-heptyl alcohol;

step 2: pretreating raw materials, filtering the recovered swill-cooked dirty oil to remove solid impurities, suspended matters and the like contained in the swill-cooked dirty oil;

and step 3: filtering, mixing the illegal cooking oil with lipase, and performing hydrolysis treatment to obtain fatty acid and glycerol; the hydrolysis condition of the step 3 is ph7.5, the hydrolysis temperature is 50 ℃, and the hydrolysis time is 5 hours;

and 4, step 4: carrying out acidification and esterification treatment on the product obtained in the step 3, wherein an acidic catalyst is adopted in the acidification treatment, and fatty acid n-octyl ester is obtained after the esterification treatment; the acid catalyst is sulfuric acid, methanesulfonic acid, p-toluenesulfonic acid, acid resin or solid acid; the weight ratio of the acidized illegal cooking oil to the acid catalyst is 10:1, and the acidized illegal cooking oil and the acid catalyst are stirred and heated to 80 ℃;

and 5: adding the rest raw materials and the product obtained in the step (4) into a mixing kettle, and uniformly stirring, wherein the heating temperature is 35 ℃;

step 6: and after natural cooling, finished products are filled and put in storage after being detected.

Example two

The preparation method of the environment-friendly solvent comprises the following steps:

step 1: weighing raw materials, 70 parts of base oil, 13 parts of antioxidant, 15 parts of surfactant, 10 parts of ethanol, 5 parts of dissolution promoter and 5 parts of antifreezing agent according to parts by weight;

the base oil is recycled swill-cooked dirty oil, the antioxidant is tocopherol, and the surfactant is polyoxyethylene sorbitan monooleate; the base oil is derived from swill-cooked dirty oil produced in fast food restaurants, school canteens and residential kitchens; the antifreezing agent is n-butyl alcohol and ethylene glycol; the cosolvent comprises chloromethyl, epoxy soybean oleic acid-2-methyl hexyl ester, n-hexyl alcohol and n-heptyl alcohol;

step 2: pretreating raw materials, filtering the recovered swill-cooked dirty oil to remove solid impurities, suspended matters and the like contained in the swill-cooked dirty oil;

and step 3: filtering, mixing the illegal cooking oil with lipase, and performing hydrolysis treatment to obtain fatty acid and glycerol; the hydrolysis condition of the step 3 is ph7.5, the hydrolysis temperature is 60 ℃, and the hydrolysis lasts for 8 hours;

and 4, step 4: carrying out acidification and esterification treatment on the product obtained in the step 3, wherein an acidic catalyst is adopted in the acidification treatment, and fatty acid n-octyl ester is obtained after the esterification treatment; the acid catalyst is sulfuric acid, methanesulfonic acid, p-toluenesulfonic acid, acid resin or solid acid; the weight ratio of the acidized illegal cooking oil to the acid catalyst is 10:1, and the mixture is stirred and heated to 120 ℃;

and 5: adding the rest raw materials and the product obtained in the step (4) into a mixing kettle, and uniformly stirring, wherein the heating temperature is 55 ℃;

step 6: and after natural cooling, finished products are filled and put in storage after being detected.

EXAMPLE III

The preparation method of the environment-friendly solvent comprises the following steps:

step 1: weighing raw materials, 60 parts of base oil, 8 parts of antioxidant, 12 parts of surfactant, 8 parts of ethanol, 3 parts of dissolution promoter and 3 parts of antifreezing agent according to parts by weight;

the base oil is recycled gutter oil, the antioxidant is tea polyphenol, and the surfactant is polyoxyethylene sorbitan monooleate; the base oil is derived from swill-cooked dirty oil produced in fast food restaurants, school canteens and residential kitchens; the antifreezing agent is glycerol and polyethylene glycol; the cosolvent comprises chloromethyl, epoxy soybean oleic acid-2-methyl hexyl ester, n-hexyl alcohol and n-heptyl alcohol;

step 2: pretreating raw materials, filtering the recovered swill-cooked dirty oil to remove solid impurities, suspended matters and the like contained in the swill-cooked dirty oil;

and step 3: filtering, mixing the illegal cooking oil with lipase, and performing hydrolysis treatment to obtain fatty acid and glycerol; the hydrolysis condition of the step 3 is ph7.5, the hydrolysis temperature is 55 ℃, and the hydrolysis time is 7 h;

and 4, step 4: carrying out acidification and esterification treatment on the product obtained in the step 3, wherein an acidic catalyst is adopted in the acidification treatment, and fatty acid n-octyl ester is obtained after the esterification treatment; the acid catalyst is sulfuric acid, methanesulfonic acid, p-toluenesulfonic acid, acid resin or solid acid; the weight ratio of the acidized illegal cooking oil to the acid catalyst is 10:1, and the mixture is stirred and heated to 100 ℃;

and 5: adding the rest raw materials and the product obtained in the step (4) into a mixing kettle, and uniformly stirring, wherein the heating temperature is 45 ℃;

step 6: and after natural cooling, finished products are filled and put in storage after being detected.

The preparation method is simple, the illegal cooking oil is recovered through synergistic cooperation, the processes of filtering, hydrolyzing, acidifying, esterifying and the like are carried out, and then the environment-friendly solvent is prepared through stirring, has good solubility on pesticides, is environment-friendly and is suitable for popularization; the illegal cooking oil is adopted, the raw materials are easy to obtain, the cost is low, the production and use cost is reduced, the illegal cooking oil needs to be treated and used for manufacturing the solvent, the illegal cooking oil is changed into valuable, great social benefit and economic benefit are generated, the pesticide can be dissolved, the environment is more protected, toxic and benzene solvents in the traditional pesticide are replaced, and the harm to users and the environment is reduced; the surfactant is used for increasing the emulsification effect, reducing the surface tension of the solvent and having a solubilizing effect on the pesticide; the components are stirred and mixed under warm conditions, so that the mutual solubility effect can be improved, and the emulsifying effect of the surfactant can be improved; the antioxidant effectively inhibits the oxidation rancidity phenomenon of oil and prolongs the validity period of the pesticide; the dissolution promoter has higher efficiency on the dissolution promotion of the pesticide, and the antifreeze enables the storage effect of the solvent to be better.

The present invention and the embodiments thereof have been described above, but the description is not limited to the embodiments, but only one of the embodiments of the present invention, and the actual embodiments are not limited thereto. In conclusion, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.