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Isooctyl nitrate crude product deacidification method

A technology of isooctyl nitrate and deacidification method is applied in the production field of petrochemical product nitrate, and can solve the problems that it is difficult to achieve acid value, the acid value of isooctyl nitrate product is easy to rebound, etc.

Inactive Publication Date: 2016-05-11
JIANGXI SILINCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to achieve an acid value lower than 3mg / KOH / 100ml with sodium bicarbonate and sodium carbonate aqueous solution, and the acid value of improperly stored isooctyl nitrate products is easy to rebound

Method used

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Experimental program
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Effect test

Embodiment 1

[0011] A kind of deacidification method of isooctyl nitrate crude product, its specific steps are: the saturated sodium chloride solution of 200 grams of 4% sodium hydroxide is added in 650 grams of isooctyl nitrate crude products, stirring reaction 1 hour, static layering , to obtain isooctyl nitrate product, the analysis acid value is 1.2mg / KOH / 100ml. After analyzing the aqueous phase, add 8 grams of sodium hydroxide to make a saturated sodium chloride solution of 6% sodium hydroxide for subsequent use.

Embodiment 2

[0013] A kind of deacidification method of isooctyl nitrate crude product, its concrete steps are: the saturated sodium chloride solution of 200 grams of 6% sodium hydroxide is added in the crude product of 800 grams of isooctyl nitrate, stirring reaction 1.5 hours, static layering , to obtain the isooctyl nitrate product, the analytical acid value is 1.3mg / KOH / 100ml. After analyzing the aqueous phase, add 9 grams of sodium hydroxide to make a saturated sodium chloride solution of 8% sodium hydroxide for subsequent use.

Embodiment 3

[0015] A kind of deacidification method of isooctyl nitrate crude product, its specific steps are: the saturated sodium chloride solution of 200 grams of 8% sodium hydroxide is added in 970 grams of isooctyl nitrate crude products, stirring reaction 1.5 hours, static layering , to obtain the isooctyl nitrate product, the analytical acid value is 0.9mg / KOH / 100ml. After analyzing the aqueous phase, add 6 grams of sodium hydroxide to make a saturated sodium chloride solution of 8% sodium hydroxide for subsequent use.

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Abstract

The present invention discloses an isooctyl nitrate crude product deacidification process, which is characterized that: sodium hydroxide is selected as a deacidification agent, and specifically, a saturated sodium chloride solution of sodium hydroxide is selected. Process steps are as follows: at room temperature, 2.5-10% of saturated sodium chloride solution of sodium hydroxide is added into an isooctyl nitrate crude product for reaction while stirring for 0.5 to 2 hours, the solution is statically stratified, an organic phase is an isooctyl nitrate product, and after an aqueous phase is analyzed, the aqueous phase is recycled by addition of sodium hydroxide. According to the isooctyl nitrate crude product deacidification process, the organic phase and the aqueous phase are quick to separate, the organic phase isooctyl nitrate residue is extremely less in the aqueous phase, and the final product acid number is below 2mg / KOH / 100ml. The isooctyl nitrate crude product deacidification process is simple in operation and low in cost, and the acid value of the product is very ideal.

Description

technical field [0001] The invention belongs to the technical field of production of petrochemical product nitrate, in particular to a method for deacidifying crude isooctyl nitrate. technical background [0002] Isooctyl nitrate is a cetane number improver for diesel oil with excellent performance. After adding it, it can effectively improve the combustion performance of diesel oil, shorten the ignition time, improve the dynamics of locomotive thermal working conditions, and the fuel saving effect is very obvious. [0003] At present, the production of isooctyl nitrate generally adopts the mixed acid method, that is, at low temperature, isooctyl alcohol is added to the mixed acid of concentrated sulfuric acid and concentrated nitric acid to react. Isooctyl products. [0004] Acid value is an important index to measure the quality of isooctyl nitrate products. According to the production technology of existing isooctyl nitrate, all need alkali washing to remove the free in...

Claims

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Application Information

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IPC IPC(8): C07C201/02C07C203/04
CPCC07C201/02C07C203/04
Inventor 廖维林芮培欣钟前熊云奎严楠林春花赵晓华
Owner JIANGXI SILINCO
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