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Method for producing pentaerythritol, strontium formate and sodium sulfate with waste liquor generated during preparation of pentaerythritol

A technology of pentaerythritol and sodium sulfate, applied in the preparation of carboxylate, sulfate/bisulfate, separation/purification of hydroxyl compounds, etc., can solve problems such as environmental pollution, waste of valuable substances, etc. Simple equipment, pollution reduction, significant social and economic benefits

Inactive Publication Date: 2011-07-06
王莉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to statistics, the discharge of mother liquor per ton of pentaerythritol products is 2 to 3 tons; at present, the waste liquid produced by the preparation of pentaerythritol is usually discharged after simple precipitation and impurity removal treatment, which not only pollutes the environment to a certain extent, but also wastes Many valuable substances are lost in the waste liquid; there is no relevant report on the method of producing pentaerythritol with the waste liquid produced by the preparation of pentaerythritol to co-produce strontium formate and sodium sulfate at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for producing pentaerythritol co-produced strontium formate and sodium sulfate with waste liquid produced by preparing pentaerythritol, comprising the following preparation steps:

[0022] Step A, the waste liquid (if calculated according to 1000Kg, then wherein, containing sodium formate 300Kg, containing pentaerythritol 80Kg) produced in the low-temperature condensation method production pentaerythritol process earlier is sent in the first underpressure distiller and carry out underpressure distillation; Discharge when saturated, then cool and crystallize with the first graded cooler, and successively obtain pentaerythritol crystals and sodium formate crystals;

[0023] Step B, washing and drying the pentaerythritol crystals obtained in step A with the first washing and drying machine, the first dryer, and the first pulverizer in turn, washing and drying the machine, the dryer, and pulverizing to obtain 80Kg of pentaerythritol products;

[0024] Step C, the s...

Embodiment 2

[0030] A method for producing pentaerythritol co-produced strontium formate and sodium sulfate with waste liquid produced by preparing pentaerythritol, comprising the following preparation steps:

[0031] Step A, the waste liquid (if calculated according to 1000Kg, then wherein, containing sodium formate 300Kg, containing pentaerythritol 80Kg) produced in the low-temperature condensation method production pentaerythritol process earlier is sent in the first underpressure distiller and carry out underpressure distillation; Discharge when saturated, then cool and crystallize with the first graded cooler, and successively obtain pentaerythritol crystals and sodium formate crystals;

[0032] Step B, washing and drying the pentaerythritol crystals obtained in step A with the first washing and drying machine, the first dryer, and the first pulverizer in turn, washing and drying the machine, the dryer, and pulverizing to obtain 80Kg of pentaerythritol products;

[0033] Step C, the s...

Embodiment 3

[0039] A method for producing pentaerythritol co-produced strontium formate and sodium sulfate with waste liquid produced by preparing pentaerythritol, comprising the following preparation steps:

[0040] Step A, the waste liquid (if calculated according to 1000Kg, then wherein, containing sodium formate 300Kg, containing pentaerythritol 80Kg) produced in the low-temperature condensation method production pentaerythritol process earlier is sent in the first underpressure distiller and carry out underpressure distillation; Discharge when saturated, then cool and crystallize with the first graded cooler, and successively obtain pentaerythritol crystals and sodium formate crystals;

[0041] Step B, washing and drying the pentaerythritol crystals obtained in step A with the first washing and drying machine, the first dryer, and the first pulverizer in turn, washing and drying the machine, the dryer, and pulverizing to obtain 80Kg of pentaerythritol products;

[0042] Step C, the s...

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PUM

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Abstract

The invention relates to the technical field of treatment and comprehensive utilization of waste liquor generated during the preparation of pentaerythritol, particularly to a method for producing pentaerythritol, strontium formate and sodium sulfate with the waste liquor generated during the preparation of pentaerythritol. The method mainly comprises the following steps: the waste liquor generated during the preparation of pentaerythritol is distilled under reduced pressure to obtain pentaerythritol crystals and sodium formate; and after the sodium formate reacts with strontium sulfate, strontium formate and sodium sulfate products are obtained through deep processing. The waste liquor can be fully utilized, so that the environmental pollution of waste residues is further reduced; and the valuable strontium formate and sodium sulfate products can be prepared. The method has remarkable social and economical benefits, and the process and the production equipment are simple, so that the method is a more practical treatment and utilization method.

Description

technical field [0001] The invention relates to the technical field of treatment and comprehensive utilization of waste liquid produced in the preparation of pentaerythritol, in particular to a method for producing pentaerythritol and co-producing strontium formate and sodium sulfate with the waste liquid produced in the preparation of pentaerythritol. technical background [0002] Pentaerythritol is an organic intermediate with a wide range of uses. It is often used in the paint industry. It is the raw material of alkyd paint. It can not only improve the hardness, gloss and durability of the paint film, but also can be used as varnish and color paint It can be used as the raw material of rosin resin such as printing ink, and can be used to manufacture flame-retardant coatings, drying oils and aviation oil lubricants; pentaerythritol tetranitrate ester made from pentaerythritol is an explosive explosive; pentaerythritol fatty acid ester can be used as polychloride Plasticize...

Claims

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Application Information

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IPC IPC(8): C07C31/24C07C29/76C07C53/06C07C51/41C01D5/10
Inventor 王嘉兴
Owner 王莉