2 Principles of Design

In the design of chemical engineering, we must choose advanced technology, reasonable economy, integrated these two points to complete the design of the program。 It is generally necessary to consider the following:

(1) To understand in detail the specifications and physical and chemical properties of the main raw materials and products, and to determine the necessary production measures and safety measures that we need to take。

(2) Analysis the feasibility of production process。 The synthetic method used in the production is reasonable and advanced, and the production method is guaranteed for the product quality and yield。

(3) The economy gains the greatest benefit。 Choose a low power consumption, high energy efficiency, good economic efficiency of production methods。

(4) Green and sustainable development。 Energy recycling methods and how to recycle raw materials。

The choice of site for chemical engineering requires the maximization of site utilization to achieve economic minimization。 In principle, we are placing equipment according to the terrain and main wind conditions,, and the need to effectively use the workshop floor area and land, with the largest possible savings in the space of the plant, for example, equipment can be placed in the open air。

3 Introduction to information

3。1。1 fatty alcohol polyoxyethylene ether (AEO-3)

Alcohol Polyoxyethylene ether is one of the most important nonionic surfactants。 The ether bond in the molecule is not easily destroyed by acid or alkali, so the stability is higher, the water solubility is better, and it is easy to biodegradable, the electrolyte is resistant and the foam is small。 Its physical and chemical properties: melting point: 41-45 ℃; boiling point: 100 ℃, can be dissolved in oil and insoluble in water。

3。1。2 maleic anhydride

Referred to as maleic anhydride, at room temperature, maleic anhydride is sour taste of colorless or white solid, the molecular formula C4H2O3。 Its chemical properties: orthorhombic colorless needle or flaky crystals, soluble in water maleic anhydride can 

produce maleic acid, soluble in ethanol and ester。

3。2 Introduction to the product

Fatty alcohol polyoxyethylene ether sulfate, English referred to as AES, fatty alcohol polyoxyethylene ether sulfate, also known as ethoxylated sodium alkyl sulfate, is an anionic surfactant。 In the production process, the fatty alcohol polyoxyethylene ether sulfate is an anionic surfactant which is obtained by the addition of the nonionic surfactant into the sulfonation reaction and the alkaline solution to adjust the pH value。 For example, Nonionic fatty alcohol polyoxyethylene ether (AEO-3), and the pH is adjusted using a basic neutralizer。 According to the structural formula of fatty alcohol polyoxyethylene ether sulfate (AES), which has both sulfation and oxyethylene groups, fatty alcohol polyoxyethylene ether sulfate (AES) has both surfactants。

Fatty alcohol polyoxyethylene ether sulfate (AES) can be dissolved in water, do not have toxicity, good biodegradability, harmless to the environment and the human body。 Fatty alcohol polyoxyethylene ether sulfate (AES) chemical properties: combustion difficulties, hydrolysis occurs under certain conditions, that is acidic conditions。

4 Production Method Summarization

4。1 Main reaction equation:

4。2 Production process

The design is mainly designed in three stages: monoesterification, diestering and sulfonation。 The specific process is as follows:

Monoesterification reaction: emptying the air inside the kettle, heating the molten maleic anhydride to start stirring, and controlling the temperature to 80 ° C to start the monoesterification reaction。