Preparation method of diisooctyl dithiophosphate additive of hydraulic oil

An isooctyl dithiophosphate and additive technology, which is applied in the field of lubricants, can solve the problems of poor hydraulic oil-water separation performance, cannot meet the requirements of hydraulic oil, increase production costs, etc., and achieves reduction of waste treatment and dosage. The effect of reducing, simple production process

Active Publication Date: 2018-04-24
XINXIANG RICHFUL LUBE ADDITIVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The products made by the first and second methods have poor water separation performance and fail to meet the requirements of hydraulic oil. The first method has an excess of 25-30% zinc oxide,

Method used

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  • Preparation method of diisooctyl dithiophosphate additive of hydraulic oil
  • Preparation method of diisooctyl dithiophosphate additive of hydraulic oil
  • Preparation method of diisooctyl dithiophosphate additive of hydraulic oil

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preparation example Construction

[0020] Such as figure 1 As shown, according to the preparation method of a diisooctyl dithiophosphate additive for hydraulic oil provided by the present invention, comprising: Step 1: preparing sulfuric acid: step 11, adding excess phosphorus to the flask in a weight ratio of 27.6 %~27.8% phosphorus pentasulfide; step 12, in the flask, drip the required amount of isooctyl alcohol; step 13, keep the temperature of the flask to be 95 ℃, no longer reduce to phosphorus pentasulfide; step 14, filter out the solid phosphorus pentasulfide, make Obtain sulfuric acid; step 2: prepare diisooctyl dithiophosphate: step 21, add excessive zinc oxide in the flask; step 22, add sulfuric acid prepared in step 1 in the flask; step 23, keep the flask The temperature is kept at 100°C for about 1 hour, and the reagent in the flask is vacuumed and distilled under reduced pressure; step 24, the reagent is filtered to obtain diisooctyl dithiophosphate; wherein, zinc oxide contains 25% to 30% The dir...

Embodiment 1

[0027] Add 200.0g of phosphorus pentasulfide solid with a P (phosphorus) content of 27.6% to 27.8% in a four-necked flask equipped with a tail gas absorption device, and connect the tail gas treatment device, first add 40ml of isooctyl alcohol, heat up to 60 ° C, and start drip Add isooctyl alcohol, the maximum reaction temperature is not more than 95°C, keep the temperature at 95°C for about 1 hour after the dropwise addition, stop the reaction when the solid of phosphorus pentasulfide no longer decreases, and then filter while hot to remove unreacted phosphorus pentasulfide to obtain sulfuric acid. After the test is qualified, it is standby; in a four-necked flask equipped with a condenser, add 24.49g (excessive 7%) of zinc oxide, wherein 18.37g (75%) of indirect method zinc oxide, 6.12g (25%) of direct method zinc oxide, oxidized Zinc addition method: first mix 6.12g of direct method zinc oxide and 6.12g of indirect method of zinc oxide and then add it to the flask, add 40ml...

Embodiment 2

[0029]Add 200.0g of phosphorus pentasulfide solid with a P content of 27.9% to 28.1% in a four-necked flask equipped with a tail gas absorption device, and connect the tail gas treatment device, first add 40ml of isooctyl alcohol, raise the temperature to 60°C, and start adding isooctyl alcohol dropwise Alcohol, the maximum reaction temperature does not exceed 95°C, keep the temperature at 95°C for about 1 hour after the dropwise addition, stop the reaction when the solid of phosphorus pentasulfide no longer decreases, and then filter while it is hot to remove unreacted phosphorus pentasulfide to prepare sulfuric acid, after passing the test Standby; add zinc oxide 24.49g (excessive 7%) in the four-necked flask that is equipped with condenser tube, wherein indirect method zinc oxide 18.37g (75%), direct method zinc oxide 6.12g (25%), zinc oxide addition method : First mix 6.12g of direct method zinc oxide and 6.12g of indirect method zinc oxide and then add it to the flask, add...

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Abstract

The invention discloses a preparation method of a diisooctyl dithiophosphate additive of hydraulic oil. The preparation method comprises the following steps: adding excessive phosphorus pentasulfide of which the weight ratio of phosphorus is 27.6%-27.8%; dropwise adding a required amount of isooctanol; maintaining the temperature of a flask to be 95 DEG C until complete reacting; filtering out solid phosphorous pentasulphur; adding excessive zinc oxide; adding prepared phosphorodithioic acid; maintaining the temperature of the flask at the temperature of 100 DEG C and insulating for about 1 hour, and vacuumizing and distilling under reduced pressure; and filtering a reagent to obtain diisooctyl dithiophosphate. The zinc oxide comprises 25-30% of direct-method zinc oxide and 70-75% of indirect-method zinc oxide, and the excessive range of the zinc oxide is 5-8%. When the diisooctyl dithiophosphate additive prepared by the technical scheme of the invention is used on the hydraulic oil, the water separation performance of the hydraulic oil is obviously improved, a production process is simple, the use amount of the zinc oxide is reduced, a catalyst is omitted, treatment of wastes in the later period is relieved, and the production cost is reduced obviously.

Description

technical field [0001] The invention relates to the technical field of lubricants, in particular to a method for preparing a diisooctyl dithiophosphate additive for hydraulic oil. Background technique [0002] Hydraulic oil is an important part of the hydraulic system, which realizes the transmission, conversion and control of energy in the hydraulic system, and at the same time plays the role of lubrication, rust prevention, cooling and shock absorption. The water separation performance is an important indicator to measure the quality of hydraulic oil, and it is also an indicator that users are most concerned about and the easiest to detect. Hydraulic oil with poor water separation performance will form an emulsion with the water in the hydraulic system. The quality of the emulsified oil will deteriorate, the lubricating effect will decrease, and harmful acidic substances will be produced to corrode the equipment. ACCIDENT. [0003] Diisooctyl zinc dithiophosphate is an a...

Claims

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Application Information

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IPC IPC(8): C07F9/17C10M137/10C10N40/08
CPCC07F9/17C10M137/10C10M2223/045C10N2040/08C10N2010/04
Inventor 王建徐坤罗明乔庆文
Owner XINXIANG RICHFUL LUBE ADDITIVE CO LTD
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