阅读说明：本技术 脱硫剂及其制备方法 (Desulfurizing agent and preparation method thereof ) 是由 王勇 顾耀 于 2020-10-19 设计创作，主要内容包括：本发明公开了脱硫剂,包括以下重量份数的组分：30～50份的甲基二乙醇胺、20～30份的二甘醇胺、15～25份的三乙醇胺、10～15份的二异丙醇胺、5～10份的木质素磺酸盐、10～20份的氢氧化钠和1～5份的消泡剂。同时,本发明还公开了上述脱硫剂的制备方法。本发明采用甲基二乙醇胺复配的方式制备脱硫剂,脱硫后总硫含量可以控制到符合国家环保标准；采用木质素磺酸盐加入配方,能够提高原油的收率；采用硼酸作为消泡剂原料,其添加入原料后能够与三乙醇胺再次发生乳化,从而提高消泡剂的消泡功能。(The invention discloses a desulfurizing agent, which comprises the following components in parts by weight: 30-50 parts of methyldiethanolamine, 20-30 parts of diglycolamine, 15-25 parts of triethanolamine, 10-15 parts of diisopropanolamine, 5-10 parts of lignosulfonate, 10-20 parts of sodium hydroxide and 1-5 parts of an antifoaming agent. Meanwhile, the invention also discloses a preparation method of the desulfurizer. According to the invention, the desulfurizer is prepared by compounding methyldiethanolamine, and the total sulfur content after desulfurization can be controlled to meet the national environmental protection standard; the yield of the crude oil can be improved by adopting a formula of adding lignosulfonate; boric acid is used as a raw material of the defoaming agent, and can be emulsified with triethanolamine again after being added into the raw material, so that the defoaming function of the defoaming agent is improved.)

1. The desulfurizer is characterized by comprising the following components in parts by weight: 30-50 parts of methyldiethanolamine, 20-30 parts of diglycolamine, 15-25 parts of triethanolamine, 10-15 parts of diisopropanolamine, 5-10 parts of lignosulfonate, 10-20 parts of sodium hydroxide and 1-5 parts of an antifoaming agent.

2. The desulfurizing agent according to claim 1, wherein the defoaming agent is prepared from polysiloxane, an emulsifier and a high-activity polyether defoaming agent in a mass ratio of 1: 1: 3-5.

3. The desulfurizing agent according to claim 2, wherein the emulsifier is prepared by mixing glycerol and boric acid in a mass ratio of 1: 2.

4. The method for preparing the desulfurizer as claimed in any one of claims 1 to 3, characterized in that the raw materials are measured according to a formula for standby, methyldiethanolamine, diglycolamine, diisopropanolamine and lignosulfonate are mixed for 20 to 30 minutes, then triethanolamine and defoamer are added and mixed for 40 to 60 minutes, finally sodium hydroxide is added and mixed for 10 to 20 minutes, and all mixing processes are carried out at normal temperature.

Technical Field

The invention belongs to the field of petrochemical industry, and particularly relates to a desulfurizing agent and a preparation method thereof.

Background

With the continuous exploitation and processing of fossil-based crude oil and the continuous improvement of social requirements on petroleum and petrochemical products, the properties of the crude oil increasingly show heaviness and deterioration, which are prominently shown as the continuous increase of the degrees of high sulfur, high acid and deterioration of the crude oil. The raw materials become heavy and poor, and the content of hydrogen sulfide in various dry gases and liquefied gases in refineries is continuously increased due to the application of various auxiliary agents, so that even though the sulfur content of many refineries is still high after desulfurization is carried out by using an alcamine desulfurizer (such as methyldiethanolamine), the quality of the desulfurized products is still unqualified. In addition, the reaction of the alcamines desulfurizer and the hydrogen sulfide is carried out after carbon dioxide and water are mixed and dissolved to form carbonic acid, so that the whole system is acidic and can corrode an engine and the like; in addition, the alcohol amine desulfurizer can be emulsified to form a certain amount of foam in the preparation process, and influences on subsequent use are caused.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a desulfurizing agent aiming at the defects of the prior art.

The invention also aims to disclose a preparation method of the desulfurizing agent.

The technical scheme is as follows: in order to achieve the above object, the present invention is specifically realized as follows: the desulfurizer comprises the following components in parts by weight: 30-50 parts of methyldiethanolamine, 20-30 parts of diglycolamine, 15-25 parts of triethanolamine, 10-15 parts of diisopropanolamine, 5-10 parts of lignosulfonate, 10-20 parts of sodium hydroxide and 1-5 parts of an antifoaming agent.

Wherein the defoaming agent is prepared from polysiloxane, an emulsifier and a high-activity polyether defoaming agent according to a mass ratio of 1: 1: 3-5.

Wherein the emulsifier is formed by mixing glycerol and boric acid according to the mass ratio of 1: 2.

The method for preparing the desulfurizer comprises the steps of weighing all raw materials according to a formula for later use, mixing methyldiethanolamine, diglycolamine, diisopropanolamine and lignosulfonate for 20-30 minutes, adding triethanolamine and defoamer for mixing for 40-60 minutes, and finally adding sodium hydroxide for mixing for 10-20 minutes, wherein all mixing processes are carried out at normal temperature.

Has the advantages that: compared with the prior art, the invention has the following advantages:

(1) according to the invention, the desulfurizer is prepared by compounding methyldiethanolamine, and the total sulfur content after desulfurization can be controlled to meet the national environmental protection standard;

(2) according to the invention, the lignosulfonate is added into the formula, so that the yield of crude oil can be improved;

(3) according to the invention, boric acid is used as a raw material of the defoaming agent, and can be emulsified with triethanolamine again after being added into the raw material, so that the defoaming function of the defoaming agent is improved;

(4) the raw material components are neutral substances, and no corrosion phenomenon is generated on equipment;

(5) the invention can not generate the phenomenon of black sulfur when the tail gas absorbs the sulfur production.

Detailed Description

The implementation of 1:

taking 30 parts of methyldiethanolamine, 20 parts of diglycolamine, 15 parts of triethanolamine, 10 parts of diisopropanolamine, 5 parts of lignosulfonate, 10 parts of sodium hydroxide and 1 part of defoamer according to parts by weight for standby, mixing the methyldiethanolamine, the diglycolamine, the diisopropanolamine and the lignosulfonate for 20-30 minutes, adding the triethanolamine and the defoamer for mixing for 40-60 minutes, and finally adding the sodium hydroxide for mixing for 10-20 minutes, wherein all mixing processes are carried out at normal temperature.

Example 2:

taking 35 parts of methyldiethanolamine, 30 parts of diglycolamine, 20 parts of triethanolamine, 11 parts of diisopropanolamine, 6 parts of lignosulfonate, 12 parts of sodium hydroxide and 2 parts of defoamer according to parts by weight for standby, mixing the methyldiethanolamine, the diglycolamine, the diisopropanolamine and the lignosulfonate for 20-30 minutes, adding the triethanolamine and the defoamer for mixing for 40-60 minutes, and finally adding the sodium hydroxide for mixing for 10-20 minutes, wherein all mixing processes are carried out at normal temperature.

Example 3:

taking 40 parts of methyldiethanolamine, 25 parts of diglycolamine, 25 parts of triethanolamine, 12 parts of diisopropanolamine, 7 parts of lignosulfonate, 13 parts of sodium hydroxide and 3 parts of defoamer according to parts by weight for standby, mixing the methyldiethanolamine, the diglycolamine, the diisopropanolamine and the lignosulfonate for 20-30 minutes, adding the triethanolamine and the defoamer for mixing for 40-60 minutes, and finally adding the sodium hydroxide for mixing for 10-20 minutes, wherein all mixing processes are carried out at normal temperature.

Example 4:

taking 45 parts of methyldiethanolamine, 20 parts of diglycolamine, 18 parts of triethanolamine, 13 parts of diisopropanolamine, 8 parts of lignosulfonate, 18 parts of sodium hydroxide and 4 parts of defoamer according to parts by weight for standby, mixing the methyldiethanolamine, the diglycolamine, the diisopropanolamine and the lignosulfonate for 20-30 minutes, adding the triethanolamine and the defoamer for mixing for 40-60 minutes, and finally adding the sodium hydroxide for mixing for 10-20 minutes, wherein all mixing processes are carried out at normal temperature.

Example 5:

taking 50 parts of methyldiethanolamine, 25 parts of diglycolamine, 22 parts of triethanolamine, 14 parts of diisopropanolamine, 9 parts of lignosulfonate, 16 parts of sodium hydroxide and 3 parts of defoamer according to parts by weight for standby, mixing the methyldiethanolamine, the diglycolamine, the diisopropanolamine and the lignosulfonate for 20-30 minutes, adding the triethanolamine and the defoamer for mixing for 40-60 minutes, and finally adding the sodium hydroxide for mixing for 10-20 minutes, wherein all mixing processes are carried out at normal temperature.

Example 6:

taking 50 parts of methyldiethanolamine, 30 parts of diglycolamine, 24 parts of triethanolamine, 15 parts of diisopropanolamine, 10 parts of lignosulfonate, 20 parts of sodium hydroxide and 5 parts of defoamer according to parts by weight for standby, mixing the methyldiethanolamine, the diglycolamine, the diisopropanolamine and the lignosulfonate for 20-30 minutes, adding the triethanolamine and the defoamer for mixing for 40-60 minutes, and finally adding the sodium hydroxide for mixing for 10-20 minutes, wherein all mixing processes are carried out at normal temperature.