Method for synthesizing primary fatty acid amide and device of ammonia gas recovery and circulation

A technology of fatty acid amide and synthesis method, which is applied in the field of synthesis of oil fine chemicals, can solve the problems of high price, environmental pollution, low catalytic activity, etc., achieve strong adaptability, reduce processing difficulty and cost, and have good activity and stability Effect

Active Publication Date: 2008-10-22
江西威科油脂化学有限公司
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

② Urethane method: using fatty acid methyl ester and ammonia as raw materials, the reaction temperature is 170-185°C, the reaction time is 10-16h, and the yield is about 85%. However, because the product contains fatty acid methyl ester, it becomes soft and hairy Viscous, and contains trans isomers, the product purity is difficult to meet the requirements, and the synthetic waste gas (waste liquid) contains methanol, which is easy to cause environmental pollution
③Amination method: fatty acid and ammonia are used as raw materials, and the ammoniation reaction is carried out under the catalysis of a catalyst. This is the easiest route for the synthesis of primary fatty acid amid...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for synthesizing primary fatty acid amide and device of ammonia gas recovery and circulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: the synthesis of oleic acid amide

[0019] First add 1700kg of oleic acid (1818 type) to the ammoniation reactor (3m from the fatty acid feeding port of the ammoniation reactor) 3 ), then open the agitator and the dehydration vacuum pump of the ammoniation reactor, heat up to 100-110° C., dehydrate for 30 minutes, close the dehydration vacuum pump, and add a type A catalyst (60 mesh chromatography silica gel 87%, activated carbon 5% , amidation catalyst NC-3018%) 30kg, continue to heat up to about 165 ° C, open the ammonia valve to feed ammonia into the ammoniation reactor, adjust the ammonia return valve and the ammonia valve, and open the ammonia recovery and circulation device , control the reaction pressure at 0.35-0.4Mpa, control the ammonia flow at 0.75-1.5m 3 / h, and control the reaction temperature between 185-188°C. After reacting for 18-20h, take a sample to analyze the acid value of free fatty acid. If the acid value is qualified (AV≤1.0mgKOH / g...

Embodiment 2

[0020] Embodiment 2: the synthesis of erucamide

[0021] Add 1800kg of erucic acid (type 90) that has melted to the ammoniation reactor (3m 3 ), then open the agitator and dehydration vacuum pump of the ammoniation reactor, heat up to 100-110°C, dehydrate for 15min, close the dehydration vacuum pump, and add B-type catalyst (200 mesh chromatography silica gel 20% and amidation catalyst NC-301 80%) 30kg, continue to heat up to about 165°C, open the ammonia valve to feed ammonia into the ammoniation reactor, adjust the ammonia return valve and the ammonia valve, open the ammonia recovery and circulation device, reduce the reaction pressure Controlled at 0.32-0.4Mpa, ammonia flow controlled at 1.0-1.8m 3 / h, and control the reaction temperature between 186-190°C. After 15 hours of reaction, take a sample and analyze the free fatty acid (acid value). If the acid value is qualified (AV≤0.8mgKOH / g), stop the ammonia reaction, and then filter and separate the catalyst , to obtain e...

Embodiment 3

[0022] Embodiment 3: the synthesis of stearylamide

[0023] Add 1600kg of molten stearic acid (1801 type) to the ammoniation reactor (3m from the fatty acid feeding port of the ammoniation reactor) 3 ), then open the agitator and dehydration vacuum pump of the ammoniation reactor, heat up to 105-115°C, dehydrate for 20min, turn off the dehydration vacuum pump, and add C-type catalyst (100 mesh chromatography silica gel 85%; trisodium phosphate 5%; active aluminum oxide 10%) 28kg, continue to heat up to about 165°C, open the ammonia valve to feed ammonia into the ammoniation reactor, adjust the ammonia return valve and the ammonia valve, and start ammonia recovery and circulation device, the reaction pressure is controlled at 0.2-0.36Mpa, and the flow rate of ammonia gas is controlled at 0.8-1.5m 3 / h, and control the reaction temperature between 190-195°C. After 18 hours of reaction, take a sample to analyze the free fatty acid (acid value), if the acid value is qualified (AV≤...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Acid valueaaaaaaaaaa
Login to view more

Abstract

The invention discloses a synthetic method of a primary fat amide and an ammonia recovery and cycle device thereof. The steps of the synthetic method of the primary fat amide are as follows: a fatty acid and the ammonia are taken as raw materials, and an amination is carried out by the catalysis of a catalyst at the reaction temperature of 160 DEG C to 210 DEG C, the reaction pressure is 0.1 to 0.4 MPa, the ammonia gas flow is 0.5 to 3.0m<3>/h and the reaction time is 8 hours to 26 hours; samples are taken out to analyze until the acid value of the free fatty acid is qualified (the acid value is less than 1.0 mgKOH/g); and the catalyst is filtered and separated by a filter, so as to obtain the primary fat amide. The ammonia recovery and cycle device consists of an ammoniation reactor, an ammonia arrestor, a condenser, a separator, an ammonia compressor, a tank, a dryer, a buffer, a flow meter and the filter. The method and the device lead the consumption of the ammonia per ton to be less than 110 kg, which is greatly lower than the ammonia consumption of the traditional technology (more than 1200 kilograms per ton), and the consumption of the ammonia per ton is close to the theoretical consumption, and a clean production can be realized. The synthetic method for the primary fat amide and the ammonia recovery and cycle device thereof are suitable for oleamide, erucyl amide, stearic amide, behenamide, lauramide, palm acid amide, peanut acid amide and 12-hydroxy stearic amide.

Description

technical field [0001] The present invention relates to the synthetic method of oil fine chemicals, relate in particular to a kind of primary fatty acid amide (RCONH 2 ) synthesis method and ammonia gas recovery and recycling device. Background technique [0002] Primary fatty acid amide (RCONH 2 ) is a high-efficiency, excellent, non-toxic, safe, environmentally friendly and sustainable polymer functional additive, which has the functions of smoothness, lubrication, antistatic, mold release, anti-corrosion and anti-aging. In the plastic industry, it is used as a slip agent, antistatic agent and release agent for films, engineering plastics and polymer alloys; in the pharmaceutical industry, it is used as a reliever and lubricant for pharmaceutical preparations; in the coating and ink industry , used as additives for leveling, slipping, anti-adhesive and dispersing; also used as penetrating agent and gloss slip agent for paper and cardboard coating, metal rust inhibitor, fu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C07C231/02
Inventor 吴贵岚
Owner 江西威科油脂化学有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap