Method for producing biodiesel capable of being applied for industrial production

Abstract

The invention relates to the technical field of a bio-diesel manufacturing method. The method for manufacturing the bio-diesel that is applicable to the industrial production consists of the procedures that: a. pre-processing stage: waste oil removed of mechanical impurities is added into a raw material tank, heated and reserved after vacuum dehydration in a dehydrator; b. spiriting stage: the pre-processed raw material is pumped into a reactor, with the weight proportion of the raw material to methyl alcohol being 1: 0.15-0.35 and the weight percent of the raw material to catalyst being 1 to 3 percent and is heated to 60-75 DEG C; water produced in the reaction and the batching methyl alcohol then enters a recovery tower in gas phase, and the water is separated, while the pure methyl alcohol refluxes into the reactor for further reaction; The catalyst is removed when the reaction finishes, and the excessive methyl alcohol that is not involved in the reaction is purified in a methyl alcohol recovery tower and recollected; The produced crude methyl ester enters a precipitation tank, and then enters a distillation tower with a small amount of water removed for constant distillation under a decompressing condition, and is the finished product can be achieved after the distillation is cooled.

Description

technical field [0001] The invention relates to the technical field of a biodiesel production method. Background technique [0002] As the storage of mineral diesel oil decreases year by year, all countries are looking for renewable bio-energy sources. Since fatty acid methyl esters are the closest to mineral diesel oil in terms of combustion performance and characteristics, and some indicators exceed mineral diesel oil, developed countries such as Europe and the United States All countries have developed biodiesel production using vegetable oil as raw material. Biodiesel was successfully developed in Germany in 1988. Biodiesel was produced from rapeseed oil, and it was officially put on the market in 1989. After three years of practical proof, using B30 biodiesel (30% biodiesel + 70% petrochemical diesel) machines for various The performance is good, and the emission of harmful gases is greatly reduced without reducing the power. In 1991, German legislation promoted the ap...

AI Technical Summary

Problems solved by technology

my country also has someone to carry out work in this respect, as Chinese patent application 92114795.3, is to produce biodiesel with natural oils and fats, can't be widely used because of the high raw material price; The method of mixing fatty acids", but because of its immature production technology, poor product quality and high energy consumption, industrial production cannot be realized