Method for direct conversion of plant soapstock into fatty acid

Abstract

The invention relates to a method for direct conversion of plant soapstock into fatty acid. The method includes: heating plant soapstock by a preheater and conveying it into a high-speed stirring reactor, and fully stirring the plant soapstock with quantitative sulfuric acid, then conducting secondary mixing through a static mixer, then carrying out stirring reaction in a reaction kettle, then performing deslagging and dehydration through a reaction precipitation tank to obtain high yield fatty acid. And the discharged water is returned to a raw material tank to carry out acid-base reaction with plant soapstock raw material, and part of the generated fatty acid enters the next cycle. The invention is a new approach for direct generation of fatty acid by continuous acidification of plant soapstock, and avoids the procedure of producing soapstock into acid oil and then performing hydrolysis. The method provided by the invention has the characteristics of easy technological operation, complete reaction of plant soapstock and sulfuric acid, small sulfuric acid dosage, thorough acidification and direct generation of fatty acid, large device treatment capacity, stable quality, no odor, low energy consumption, low cost, no wastewater production, and energy saving and environmental protection.

Description

technical field [0001] The invention relates to a method for directly converting plant soapstock into fatty acids. Background technique [0002] Vegetable oil foot is the main raw material for domestic production of fatty acid series products. At present, domestic soapstock basically uses soapstock to enter the acidification tank, add 8-10% sulfuric acid, and then heat and stir with steam to carry out acidification reaction, drain the waste water after precipitation, and obtain acidified oil, which then enters the hydrolysis tower for heating , pressurized, and hydrolyzed with water to obtain fatty acids. The process consumes a lot of energy and acid, and produces a large amount of waste water. During the acidification production process, the odor is mostly discharged in an unorganized manner, and the environmental pollution is very serious. The acidified oil produced needs to be hydrolyzed for the second time. The amount of water added is 30%, and it is heated. Temperatur...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for directly converting plant soapstock into fatty acid, which solves the technical problems of high energy consumption, large amount of acid, generation of a large amount of waste water and waste gas, and serious environmental pollution in the fatty acid production process. Easy to operate, full reaction between plant soapstock and sulfuric acid, less sulfuric acid consumption, thorough acidification and direct generation of fatty acids, large processing capacity, stable quality, odorless, low energy consumption, low cost, no waste water generation, energy saving and environmental protection

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