Novel industrial process for purifying dibutyl nylon acid ester
A technology of dibutyl nylon acid and nylon acid, which is applied in the field of new industrialization process for purifying dibutyl nylon acid, can solve the problems of high equipment cost, slow purification process, high energy consumption, etc., and achieve high production capacity, reduce energy consumption, equipment less investment
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Embodiment 1
[0037] The invention discloses a novel industrial process for purifying dibutyl nylon acid, which uses nylon acid and isobutanol or n-butanol as raw materials in a mass ratio of 2.6:1, and reacts under catalyst conditions to obtain dibutyl nylon acid The mixture is then purified, and the technological process includes the following steps:
[0038] S1, pretreatment: remove the catalyst in the dibutyl nylon acid mixture, stand-by;
[0039] S2. Distillation treatment: the dibutyl nylonate mixture after the pretreatment of step S1 is removed by vacuum distillation to remove excess or unreacted butanol and generated water to obtain the crude product of dibutyl nylonate; the condition of vacuum distillation is -0.075 MPa, 110°C.
[0040] S3. Purification treatment: Purify the crude dibutyl nylonate obtained in step S2 through an alkaline solid purification column to obtain a purified dibutyl nylonate. The conditions for the dibutyl nylon acid crude product to pass through the alka...
Embodiment 2
[0045] The invention discloses a novel industrial process for purifying dibutyl nylon acid, which uses nylon acid and isobutanol or n-butanol as raw materials in a mass ratio of 2.5:1, and reacts under catalyst conditions to obtain dibutyl nylon acid The mixture is then purified, and the technological process includes the following steps:
[0046] S1, pretreatment: remove the catalyst in the dibutyl nylon acid mixture, stand-by;
[0047] S2. Distillation treatment: the dibutyl nylonate mixture after the pretreatment of step S1 is removed by vacuum distillation to remove excess or unreacted butanol and generated water to obtain the crude product of dibutyl nylonate; the condition of vacuum distillation is -0.085 MPa, 90°C.
[0048]S3. Purification treatment: Purify the crude dibutyl nylonate obtained in step S2 through an alkaline solid purification column to obtain a purified dibutyl nylonate. The conditions for the dibutyl nylon acid crude product to pass through the alkali...
Embodiment 3
[0053] The invention discloses a new type of industrial process for purifying dibutyl nylon acid, using nylon acid and isobutanol or n-butanol as raw materials in a mass ratio of 2.4:1, and reacting under catalyst conditions to obtain dibutyl nylon acid The mixture is then purified, and the technological process includes the following steps:
[0054] S1, pretreatment: remove the catalyst in the dibutyl nylon acid mixture, stand-by;
[0055] S2. Distillation treatment: the dibutyl nylonate mixture after the pretreatment of step S1 is removed by vacuum distillation to remove excess or unreacted butanol and generated water to obtain the crude product of dibutyl nylonate; the condition of vacuum distillation is -0.095 MPa, 130°C.
[0056] S3. Purification treatment: Purify the crude dibutyl nylonate obtained in step S2 through an alkaline solid purification column to obtain a purified dibutyl nylonate. The conditions for the dibutyl nylon acid crude product to pass through the a...
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Abstract
Description
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Application Information
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