The present application relates to a compound of the following formula (I) ##STR00001## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represent independently of each other H or a (C.sub.1-C.sub.30) alkyl group, the total sum of the number of carbon atoms of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 being equal to 6+4x, x being a whole number of between 1 and 6, provided that: at most two of the groups R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are H, R.sup.5 represents H, OR, or NRR R, R and R, identical or different, represent H, a (C1-C10) alkyl group, at least one of groups R.sup.1, R.sup.2, R.sup.3 or R.sup.4 comprises or is a tertiobutyl group. (I) the method for preparing same and the uses thereof as a plasticising lubricant, surfactant or in a cosmetic composition.

A catalyst comprises gold particles and titanium-containing particles. The catalyst comprises gold particles that are within at least 15 nm of at least one titanium-containing particle. The gold particles have an average diameter of less than 15 nm and a standard deviation of +/5 nm. A method for preparing methyl methacrylate from methacrolein and methanol using the catalyst is also disclosed.

A catalyst comprises gold particles and titanium-containing particles. The catalyst comprises gold particles that are within at least 15 nm of at least one titanium-containing particle. The gold particles have an average diameter of less than 15 nm and a standard deviation of +/5 nm. A method for preparing methyl methacrylate from methacrolein and methanol using the catalyst is also disclosed.

A process can be used for preparing methyl methacrylate by direct oxidative esterification of methacrolein. Methyl methacrylate is used in large amounts for preparing polymers and copolymers with other polymerizable compounds. In addition, methyl methacrylate is an important synthesis unit for a variety of specialty esters based on methacrylic acid (MAA) which can be prepared by transesterification with the appropriate alcohol. There is consequently a great interest in very simple, economic and environmentally friendly processes for preparing this starting material. A corresponding optimized workup of the reactor output from the oxidative esterification of methacrolein, through which unconverted methacrolein (MAL) can be recycled very efficiently, is useful. In addition, the process can be carried out in a manner which compared to known variants is markedly more energy- and water-saving.

A process can be used for preparing methyl methacrylate by direct oxidative esterification of methacrolein. Methyl methacrylate is used in large amounts for preparing polymers and copolymers with other polymerizable compounds. In addition, methyl methacrylate is an important synthesis unit for a variety of specialty esters based on methacrylic acid (MAA) which can be prepared by transesterification with the appropriate alcohol. There is consequently a great interest in very simple, economic and environmentally friendly processes for preparing this starting material. A corresponding optimized workup of the reactor output from the oxidative esterification of methacrolein, through which unconverted methacrolein (MAL) can be recycled very efficiently, is useful. In addition, the process can be carried out in a manner which compared to known variants is markedly more energy- and water-saving.

Disclosed herein is a process for preparing a compound of formula (I). Also disclosed herein are compounds of formula (V), formula (VI), and formula (VIII).

Disclosed herein is a process for preparing a compound of formula (I). Also disclosed herein are compounds of formula (V), formula (VI), and formula (VIII).

A continuous production system for alcohol ester C-12 is provided, comprising: a feedstock tank, a reaction tower, an atmospheric distillation tower, a vacuum distillation tower, a condenser, a water washing tower, a dehydration tower, an evaporator, a light component removal tower, and a rectifying tower that are all connected with each other through pipelines. The continuous production system for alcohol ester C-12 replaces the traditional intermittent production process with the advantages of good batch stability, less by-products, and high yield.

A continuous production system for alcohol ester C-12 is provided, comprising: a feedstock tank, a reaction tower, an atmospheric distillation tower, a vacuum distillation tower, a condenser, a water washing tower, a dehydration tower, an evaporator, a light component removal tower, and a rectifying tower that are all connected with each other through pipelines. The continuous production system for alcohol ester C-12 replaces the traditional intermittent production process with the advantages of good batch stability, less by-products, and high yield.