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A kind of production method of stearic acid

A production method and technology of stearic acid, applied in the field of oil deep processing, can solve the problems of high product price and unstable quality, and achieve the effects of low product price, stable product quality and low production volume.

Active Publication Date: 2014-10-29
丰益油脂科技(天津)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the stearic acid currently on the market generally has the problems of high product price and unstable quality.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] like figure 1 Shown, a kind of production method of stearic acid comprises the steps:

[0025] The raw material oil is refined palm stearin (RPS). The indicators of refined palm stearin are as follows: free fatty acid (calculated as palmitic acid) ≤ 0.2%, moisture and volatile matter ≤ 0.15%, iodine value ≤ 48gI 2 / 100g, color ≤3R, fatty acid content (C18:0+C18:1+C18:2) ≥36, melting point 50-56°C, saponification value 193-205mgKOH / g, unsaponifiable matter ≤1%.

[0026] In the drying tank DR2101, the raw material oil is dried and degassed. The pressure of the drying tank DR2101 is about 110mbar and the temperature is 105-110°C. Bring the Dryer DR2101 to a sufficient temperature.

[0027] The degassed and dehydrated raw oil is continuously sent to the bottom of the hydrolysis tower, the amount of water added is 60% of the mass of the raw oil, the reaction temperature of the hydrolysis is controlled at about 250°C, and the pressure of the hydrolysis is guaranteed to be 5...

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Abstract

The invention relates to a production method of stearic acid, comprising the following steps: hydrolysis, hydrogenation, and distillation, wherein the hydrolysis step is characterized by selecting palm oil or other grease as raw oil, according to the weight ratio of the raw oil to water being 95-105:55-65, controlling the reaction temperature of hydrolysis to be 245-260 DEG C, and guaranteeing the pressure of hydrolysis to be 48-55bar. According to the invention, the production method disclosed herein has the advantages of low cost, high utilization rate of raw materials, stable product quality, and low product price, the competitiveness of the product in the market is raised, thus the product can be widely popularized in the market.

Description

technical field [0001] The invention relates to the technical field of oil deep processing, in particular to a production method of stearic acid. Background technique [0002] Stearic acid is currently widely used in petrochemical, daily chemical, rubber, plastic, medicine, paint and other industries, mainly in the plastics industry, stearic acid can be used to produce hard salt as a heat stabilizer for polyvinyl chloride, and can also be used to synthesize hard Fatty acid amide (EBS), used as a lubricant for ABS engineering plastics. In the rubber industry, stearic acid is used as a vulcanizing agent and emulsifier. These two industries have achieved an average growth rate of 10% in recent years, so the increase in stearic acid is also about 10%, which does not include other The rate of growth in the field, and fatty amines are made from stearic acid, and AKD is synthesized in papermaking additives; it is used as softener and antistatic agent in the textile industry. In re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11C1/04C11C1/10C11C3/12
Inventor 邰卫星白清洁刘尚森朱志宇张延武
Owner 丰益油脂科技(天津)有限公司
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